US20070028733A1 - Safety methods for use in power equipment - Google Patents

Safety methods for use in power equipment Download PDF

Info

Publication number
US20070028733A1
US20070028733A1 US11542938 US54293806A US2007028733A1 US 20070028733 A1 US20070028733 A1 US 20070028733A1 US 11542938 US11542938 US 11542938 US 54293806 A US54293806 A US 54293806A US 2007028733 A1 US2007028733 A1 US 2007028733A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
ser
filed
blade
system
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11542938
Inventor
Stephen Gass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SD3 LLC
Original Assignee
SD3 LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/02Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
    • B23D47/025Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier of tables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/08Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for bringing the circular saw blade to the workpiece or removing same therefrom
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00Accessories specially designed for sawing machines or sawing devices
    • B23D59/001Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22Safety devices specially adapted for cutting machines
    • B26D7/24Safety devices specially adapted for cutting machines arranged to disable the operating means for the cutting member
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B13/00Band or strap sawing machines; Components or equipment therefor
    • B27B13/14Braking devices specially designed for band sawing machines, e.g. acting after damage of the band saw blade
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29Details; Component parts; Accessories
    • B27B5/38Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS; TOOLS; SAFETY DEVICES, e.g. THOSE FOR SAWS
    • B27G19/00Safety guards or devices specially designed for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS; TOOLS; SAFETY DEVICES, e.g. THOSE FOR SAWS
    • B27G19/00Safety guards or devices specially designed for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02Safety guards or devices specially designed for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS; TOOLS; SAFETY DEVICES, e.g. THOSE FOR SAWS
    • B27G19/00Safety guards or devices specially designed for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/06Safety guards or devices specially designed for wood saws; Auxiliary devices facilitating proper operation of wood saws for band or strap saws
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16PSAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16PSAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16PSAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/148Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using capacitive technology
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00Safety arrangements
    • G05B9/02Safety arrangements electric
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00Cutting
    • Y10S83/01Safety devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/04Processes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/081With randomly actuated stopping means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/081With randomly actuated stopping means
    • Y10T83/088Responsive to tool detector or work-feed-means detector
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/081With randomly actuated stopping means
    • Y10T83/088Responsive to tool detector or work-feed-means detector
    • Y10T83/089Responsive to tool characteristic
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/081With randomly actuated stopping means
    • Y10T83/091Responsive to work sensing means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/141With means to monitor and control operation [e.g., self-regulating means]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/162With control means responsive to replaceable or selectable information program
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/162With control means responsive to replaceable or selectable information program
    • Y10T83/173Arithmetically determined program
    • Y10T83/175With condition sensor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/162With control means responsive to replaceable or selectable information program
    • Y10T83/173Arithmetically determined program
    • Y10T83/175With condition sensor
    • Y10T83/178Responsive to work
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/525Operation controlled by detector means responsive to work
    • Y10T83/541Actuation of tool controlled in response to work-sensing means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/606Interrelated tool actuating means and guard means
    • Y10T83/613Work guard
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7684With means to support work relative to tool[s]
    • Y10T83/7693Tool moved relative to work-support during cutting
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7684With means to support work relative to tool[s]
    • Y10T83/7693Tool moved relative to work-support during cutting
    • Y10T83/7697Tool angularly adjustable relative to work-support
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7684With means to support work relative to tool[s]
    • Y10T83/7722Support and tool relatively adjustable
    • Y10T83/7726By movement of the tool
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7734With guard for tool
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7755Carrier for rotatable tool movable during cutting
    • Y10T83/7788Tool carrier oscillated or rotated
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/849With signal, scale, or indicator
    • Y10T83/85Signal; e.g., alarm
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8773Bevel or miter cut

Abstract

Woodworking machines and safety methods for use with those machines are disclosed. The machines include a detection system adapted to detect one or more dangerous conditions and a reaction system associated with the detection system. The reaction system can include an explosive to trigger the system, and also can be configured to retract a cutting tool at least partially away from a cutting region upon detection of a dangerous condition by the detection system.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • [0001]
    This application is a continuation of the following U.S. patent applications, all of which are hereby incorporated by reference in their entireties for all purposes:
  • [0002]
    Ser. No. 09/929,426, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,200, filed Aug. 14, 2000;
  • [0003]
    Ser. No. 09/929,221, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,211, filed Aug. 14, 2000;
  • [0004]
    Ser. No. 09/929,227, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,170, filed Aug. 14, 2000;
  • [0005]
    Ser. No. 11/401,050, filed Apr. 10, 2006, which is a continuation of a number of applications including Ser. No. 09/929,241, filed Aug. 13, 2001, issuing as U.S. Pat. No. 7,024,975 on Apr. 11, 2006, which in turn claimed the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,169, filed Aug. 14, 2000;
  • [0006]
    Ser. No. 09/929,242, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,089, filed Aug. 14, 2000;
  • [0007]
    Ser. No. 10/984,643, filed Nov. 8, 2004, which is a continuation of a number of applications, including Ser. No. 10/205,164, filed Jul. 25, 2002, issuing as U.S. Pat. No. 6,945,149 on Sep. 20, 2005, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/307,756, filed Jul. 25, 2001, and Ser. No. 10/202,928, filed Jul. 25, 2002, issuing as U.S. Pat. No. 7,000,514 on Feb. 21, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/308,492, filed Jul. 27, 2001;
  • [0008]
    Ser. No. 09/929,236, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,201, filed Aug. 14, 2000;
  • [0009]
    Ser. No. 11/061,162, filed Feb. 18, 2005, which is a continuation of Ser. No. 09/929,244, filed Aug. 13, 2001, issuing as U.S. Pat. No. 6,857,345 on Feb. 22, 2005, which in turn claimed the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,212, filed Aug. 14, 2000;
  • [0010]
    Ser. No. 09/929,237, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,059, filed Aug. 14, 2000;
  • [0011]
    Ser. No. 09/929,234, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,094, filed Aug. 14, 2000;
  • [0012]
    Ser. No. 09/929,425, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,210, filed Aug. 14, 2000;
  • [0013]
    Ser. No. 11/190,111, filed Jul. 25, 2005, which is a continuation of a number of applications including Ser. No. 09/929,226, filed Aug. 13, 2001, issuing as U.S. Pat. No. 6,920,814 on Jul. 26, 2005, which in turn claimed the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,206, filed Aug. 14, 2000; Ser. No. 10/205,164, filed Jul. 25, 2002, issuing as U.S. Pat. No. 6,945,149 on Sep. 20, 2005, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/307,756, filed Jul. 25, 2001; and Ser. No. 10/202,928, filed Jul. 25, 2002, issuing as U.S. Pat. No. 7,000,514 on Feb. 21, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/308,492, filed Jul. 27, 2001;
  • [0014]
    Ser. No. 09/929,235, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,058, filed Aug. 14, 2000;
  • [0015]
    Ser. No. 09/929,238, filed Aug. 13, 2001, which claims the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,057, filed Aug. 14, 2000;
  • [0016]
    Ser. No. 11/447,449, filed Jun. 5, 2006, which is a continuation of Ser. No. 09/676,190, filed Sep. 29, 2000, issuing as U.S. Pat. No. 7,055,417 on Jun. 6, 2006, which in turn claimed the benefit of and priority from the following U.S. Provisional Patent Applications: Ser. No. 60/182,866, filed Feb. 16, 2000, and Ser. No. 60/157,340, filed Oct. 1, 1999;
  • [0017]
    Ser. No. 10/053,390, filed Jan. 16, 2002, which is a continuation-in-part of a number of applications including Ser. No. 09/676,190, filed Sep. 29, 2000, issuing as U.S. Pat. No. 7,055,417 on Jun. 6, 2006; and Ser. No. 10/053,390 also claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/270,011, filed Feb. 20, 2001;
  • [0018]
    Ser. No. 11/348,580, filed Feb. 6, 2006, which is a continuation of a number of applications including Ser. No. 10/052,705, filed Jan. 16, 2002, issuing as U.S. Pat. No. 6,994,004 on Feb. 7, 2006, which in turn claimed the benefit of and priority from the following U.S. Provisional Patent Applications: Ser. No. 60/270,011, filed Feb. 20, 2001, Ser. No. 60/270,941, filed Feb. 22, 2001, Ser. No. 60/270,942, filed Feb. 22, 2001, Ser. No. 60/273,177, filed Mar. 2, 2001, and Ser. No. 60/273,178, filed Mar. 2, 2001; and Ser. No. 11/348,580 also claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/667,485, filed Mar. 31, 2005;
  • [0019]
    Ser. No. 10/932,339, filed Sep. 1, 2004, which is a continuation of Ser. No. 10/047,066, filed Jan. 14, 2002, issuing as U.S. Pat. No. 6,945,148 on Sep. 20, 2005, which in turn claimed the benefit of and priority from the following U.S. Provisional Patent Applications: Ser. No. 60/270,011, filed Feb. 20, 2001, Ser. No. 60/270,941, filed Feb. 22, 2001, Ser. No. 60/270,942, filed Feb. 22, 2001, Ser. No. 60/273,177, filed Mar. 2, 2001, Ser. No. 60/273,178, filed Mar. 2, 2001, and Ser. No. 60/273,902, filed Mar. 6, 2001; and Ser. No. 10/392,339 is also a continuation of Ser. No. 10/050,085, filed Jan. 14, 2002;
  • [0020]
    Ser. No. 10/100,211, filed Mar. 13, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/275,583, filed Mar. 13, 2001;
  • [0021]
    Ser. No. 11/256,757, filed Oct. 24, 2005, which is a continuation of Ser. No. 09/955,418, filed Sep. 17, 2001, issuing as U.S. Pat. No. 6,957,601 on Oct. 25, 2005, which in turn claimed the benefit of and priority to a number of U.S. Provisional Patent Applications, including: Ser. No. 60/233,459, filed Sep. 18, 2000, Ser. No. 60/270,011, filed Feb. 20, 2001, Ser. No. 60/270,941, filed Feb. 22, 2001, Ser. No. 60/270,942, filed Feb. 22, 2001, Ser. No. 60/273,177, filed Mar. 2, 2001, Ser. No. 60/273,178, filed Mar. 2, 2001, Ser. No. 60/273,902, filed Mar. 6, 2001, Ser. No. 60/275,594, filed Mar. 13, 2001, Ser. No. 60/275,595, filed Mar. 13, 2001, Ser. No. 60/279,313, filed Mar. 27, 2001, Ser. No. 60/292,081, filed May 17, 2001, Ser. No. 60/292,100, filed May 17, 2001, Ser. No. 60/298,207, filed Jun. 13, 2001, Ser. No. 60/302,937, filed Jul. 2, 2001, Ser. No. 60/302,916, filed Jul. 3, 2001, Ser. No. 60/306,202, filed Jul. 18, 2001, Ser. No. 60/307,657, filed Jul. 25, 2001, Ser. No. 60/308,492, filed Jul. 27, 2001, and Ser. No. 60/312,141, filed Aug. 13, 2001;
  • [0022]
    Ser. No. 10/146,527, filed May 15, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/292,100, filed May 17, 2001;
  • [0023]
    Ser. No. 11/218,356, filed Sep. 2, 2005, which is a continuation of a number of applications including Ser. No. 10/146,527, filed May 15, 2002, which in turn claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/292,100, filed May 17, 2001;
  • [0024]
    Ser. No. 10/172,553, filed Jun. 13, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/298,207, filed Jun. 13, 2001;
  • [0025]
    Ser. No. 10/189,031, filed Jul. 2, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/302,937, filed Jul. 2, 2001;
  • [0026]
    Ser. No. 10/189,027, filed Jul. 2, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/302,916, filed Jul. 3, 2001;
  • [0027]
    Ser. No. 11/353,423, filed Feb. 13, 2006, which is a continuation of Ser. No. 10/785,361, filed Feb. 23, 2004, issuing as U.S. Pat. No. 6,997,090 on Feb. 14, 2006, which in turn is a continuation of Ser. No. 10/215,929, filed Aug. 9, 2002, which in turn claimed the benefit of and priority to U.S. Provisional Patent Application Ser. No. 60/312,141, filed Aug. 13, 2001;
  • [0028]
    Ser. No. 11/208,214, filed Aug. 19, 2005, which is a continuation of Ser. No. 10/251,576, filed Sep. 20, 2002, which in turn was a continuation-in-part of Ser. No. 10/197,975, filed Jul. 18, 2002, and which claimed the benefit of and priority to U.S. Provisional Patent Application Ser. No. 60/323,975, filed Sep. 21, 2001, and Ser. No. 11/208,214 is also a continuation-in-part of Ser. No. 09/676,190, filed Sep. 29, 2000, issuing as U.S. Pat. No. 7,055,417 on Jun. 6, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/157,340, filed Oct. 1, 1999 and Ser. No. 60/182,866, filed Feb. 16, 2000;
  • [0029]
    Ser. No. 10/243,042, filed Sep. 13, 2002, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/324,729, filed Sep. 24, 2001;
  • [0030]
    Ser. No. 11/487,717, filed Jul. 17, 2006, which is a continuation of Ser. No. 10/292,607, filed Nov. 12, 2002, issuing as U.S. Pat. No. 7,077,039 on Jul. 18, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/335,970, filed Nov. 13, 2001;
  • [0031]
    Ser. No. 10/345,630, filed Jan. 15, 2003, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/349,989, filed Jan. 16, 2002;
  • [0032]
    Ser. No. 10/341,260, filed Jan. 13, 2003, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/351,797, filed Jan. 25, 2002;
  • [0033]
    Ser. No. 11/445,548, filed Jun. 2, 2006, which is a continuation of a number of applications, including the following: Ser. No. 09/929,240, filed Aug. 13, 2001, issuing as U.S. Pat. No. 7,100,483 on Sep. 5, 2006, which in turn claimed the benefit of and priority from a number of U.S. Provisional Patent Applications including Ser. No. 60/225,056, filed Aug. 14, 2000; Ser. No. 10/643,296, filed Aug. 18, 2003, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/406,138, filed Aug. 27, 2002; and Ser. No. 10/794,161, filed Mar. 4, 2004, issuing as U.S. Pat. No. 7,098,800 on Aug. 29, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/452,159, filed Mar. 5, 2003;
  • [0034]
    Ser. No. 10/923,290, filed Aug. 20, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/496,550, filed Aug. 20, 2003;
  • [0035]
    Ser. No. 10/923,273, filed Aug. 20, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/496,574, filed Aug. 20, 2003;
  • [0036]
    Ser. No. 11/401,774, filed Apr. 11, 2006, which is a continuation of a number of applications including Ser. No. 11/027,322, filed Dec. 31, 2004, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/533,598, filed Dec. 31, 2003; and Ser. No. 11/401,774 is also a continuation of Ser. No. 09/676,190, filed Sep. 29, 2000, issuing as U.S. Pat. No. 7,055,417 on Jun. 6, 2006, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/157,340, filed Oct. 1, 1999 and Ser. No. 60/182,866, filed Feb. 16, 2000;
  • [0037]
    Ser. No. 11/506,260, filed Aug. 18, 2006, which is a continuation of a number of application including Ser. No. 10/923,282, filed Aug. 20, 2004, which in turn claimed the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/496,568, filed Aug. 20, 2003;
  • [0038]
    Ser. No. 11/027,600, filed Dec. 31, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/533,791, filed Dec. 31, 2003;
  • [0039]
    Ser. No. 11/107,499, filed Apr. 15, 2005;
  • [0040]
    Ser. No. 11/027,254, filed Dec. 31, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/533,852, filed Dec. 31, 2003;
  • [0041]
    Ser. No. 11/026,114, filed Dec. 31, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/533,811, filed Dec. 31, 2003;
  • [0042]
    Ser. No. 11/026,006, filed Dec. 31, 2004, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/533,575, filed Dec. 31, 2003;
  • [0043]
    Ser. No. 11/045,972, filed Jan. 28, 2005, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/540,377, filed Jan. 29, 2004;
  • [0044]
    Ser. No. 11/395,502, filed Mar. 31, 2006, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/667,485, filed Mar. 31, 2005; and
  • [0045]
    Ser. No. 11/098,984, filed Apr. 4, 2005, which is a continuation of a Ser. No. 09/929,238, filed Aug. 13, 2001, Ser. No. 10/047,066, filed Jan. 14, 2002, issuing as U.S. Pat. No. 6,945,148 on Sep. 20, 2005, Ser. No. 10/051,782, filed Jan. 15, 2002, issuing as U.S. Pat. No. 6,877,410 on Apr. 12, 2005, which in turn claimed the benefit of and priority from the following U.S. Provisional Patent Applications: Ser. No. 60/270,011, filed Feb. 20, 2001, Ser. No. 60/270,941, filed Feb. 22, 2001, Ser. No. 60/270,942, filed Feb. 22, 2001, Ser. No. 60/273,177, filed Mar. 2, 2001, Ser. No. 60/273,178, filed Mar. 2, 2001, Ser. No. 60/273,902, filed Mar. 6, 2001, and Ser. No. 60/275,594, filed Mar. 13, 2001; and Ser. No. 11/098,984 is also a continuation of Ser. No. 10/052,806, filed Jan. 16, 2002, issuing as U.S. Pat. No. 6,880,440 on Apr. 19, 2005, which in turn claimed the benefit of and priority from the following U.S. Provisional Patent Applications: Ser. No. 60/270,011, filed Feb. 20, 2001, Ser. No. 60/270,941, filed Feb. 22, 2001, and Serial No. 60/270,942, filed Feb. 22, 2001; and Ser. No. 11/098,984 is also a continuation of Ser. No. 10/643,296, filed Aug. 18, 2003, and Ser. No. 10/932,339, filed Sep. 1, 2004.
  • FIELD
  • [0046]
    The present disclosure relates to safety systems and more particularly to methods for enhancing the safety of power equipment.
  • BACKGROUND
  • [0047]
    Power equipment such as table saws, miter saws and other woodworking machinery include cutting tools like circular saw blades and knife blades that present a risk of injury to a user of the equipment. Accordingly, safety features or systems are incorporated with power equipment to minimize the risk of injury. Probably the most common safety feature is a guard that physically blocks an operator from making contact with dangerous components of machinery, such as belts, shafts or blades. In many cases, guards effectively reduce the risk of injury, however, there are many instances where the nature of the operations to be performed precludes using a guard that completely blocks access to hazardous machine parts.
  • [0048]
    Other safety systems try to prevent or minimize injury by detecting and reacting to an event. For instance, U.S. Pat. Nos. 3,953,770, 4,075,961, 4,470,046, 4,532,501 and 5,212,621, the disclosures of which are incorporated herein by reference, disclose radio-frequency safety systems which utilize radio-frequency signals to detect the presence of a user's hand in a dangerous area of the machine and thereupon prevent or interrupt operation of the machine. U.S. Pat. Nos. 3,785,230 and 4,026,177, the disclosures of which are herein incorporated by reference, disclose a safety system for use on circular saws to stop the blade when a user's hand approaches the blade. The system uses the blade as an antenna in an electromagnetic proximity detector to detect the approach of a user's hand prior to actual contact with the blade. Upon detection of a user's hand, the system engages a brake using a standard solenoid.
  • [0049]
    U.S. Pat. No. 4,117,752, which is herein incorporated by reference, discloses a braking system for use with a band saw, where the brake is triggered by actual contact between the user's hand and the blade. However, the system described for detecting blade contact does not appear to be functional to accurately and reliably detect contact. Furthermore, the system relies on standard electromagnetic brakes operating off of line voltage to stop the blade and pulleys of the band saw. It is believed that such brakes would take 50 ms-1 s to stop the blade. Therefore, the system is too slow to stop the blade quickly enough to avoid serious injury.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0050]
    FIG. 1 is a schematic block diagram of a machine with a fast-acting safety system.
  • [0051]
    FIG. 2 is a schematic diagram of an exemplary safety system in the context of a machine having a circular blade.
  • [0052]
    FIG. 3 is a schematic side view of a table saw with a retraction system.
  • [0053]
    FIG. 4 is a schematic side view of a second side of a table saw with a retraction system.
  • [0054]
    FIG. 5 is a schematic, side view of a saw with another embodiment of a retraction system.
  • [0055]
    FIG. 6 is a section view of a retraction system using a deformable bushing.
  • [0056]
    FIG. 7 is a schematic side view of a miter saw with a retraction system.
  • [0057]
    FIG. 8 is a section view of the miter saw shown in FIG. 7.
  • [0058]
    FIG. 9 shows another embodiment of a miter saw with a retraction system.
  • [0059]
    FIG. 10 shows a schematic drawing of a retraction system using a spring to retract a cutting tool.
  • [0060]
    FIG. 11 is a sectional view of the retraction system shown in FIG. 10.
  • [0061]
    FIG. 12 also is a sectional view of the retraction system shown in FIG. 10.
  • [0062]
    FIG. 13 is a schematic view of a band saw with a retraction system.
  • [0063]
    FIG. 14 is a top view of a roller used in the system shown in FIG. 13.
  • [0064]
    FIG. 15 shows an explosive charge that can be triggered by a firing subsystem.
  • DETAILED DESCRIPTION
  • [0065]
    A machine that may incorporate a retraction system according to the present disclosure is shown schematically in FIG. 1 and indicated generally at 10. Machine 10 may be any of a variety of different machines adapted for cutting workpieces, such as wood, including a table saw, miter saw (chop saw), radial arm saw, circular saw, band saw, jointer, planer, etc. Machine 10 includes an operative structure 12 having a cutting tool 14 and a motor assembly 16 adapted to drive the cutting tool. Machine 10 also includes a safety system 18 configured to minimize the potential of a serious injury to a person using machine 10. Safety system 18 is adapted to detect the occurrence of one or more dangerous conditions during use of machine 10. If such a dangerous condition is detected, safety system 18 is adapted to engage operative structure 12 to limit any injury to the user caused by the dangerous condition.
  • [0066]
    Machine 10 also includes a suitable power source 20 to provide power to operative structure 12 and safety system 18. Power source 20 may be an external power source such as line current, or an internal power source such as a battery. Alternatively, power source 20 may include a combination of both external and internal power sources. Furthermore, power source 20 may include two or more separate power sources, each adapted to power different portions of machine 10.
  • [0067]
    It will be appreciated that operative structure 12 may take any one of many different forms, depending on the type of machine 10. For example, operative structure 12 may include a stationary housing configured to support motor assembly 16 in driving engagement with cutting tool 14. Alternatively, operative structure 12 may include a movable structure configured to carry cutting tool 14 between multiple operating positions. As a further alternative, operative structure 12 may include one or more transport mechanisms adapted to convey a workpiece toward and/or away from cutting tool 14.
  • [0068]
    Motor assembly 16 includes one or more motors adapted to drive cutting tool 14. The motors may be either directly or indirectly coupled to the cutting tool, and may also be adapted to drive workpiece transport mechanisms. Cutting tool 14 typically includes one or more blades or other suitable cutting implements that are adapted to cut or remove portions from the workpieces. The particular form of cutting tool 14 will vary depending upon the various embodiments of machine 10. For example, in table saws, miter saws, circular saws and radial arm saws, cutting tool 14 will typically include one or more circular rotating blades having a plurality of teeth disposed along the perimetrical edge of the blade. For a jointer or planer, the cutting tool typically includes a plurality of radially spaced-apart blades. For a band saw, the cutting tool includes an elongate, circuitous tooth-edged band.
  • [0069]
    Safety system 18 includes a detection subsystem 22, a reaction subsystem 24 and a control subsystem 26. Control subsystem 26 may be adapted to receive inputs from a variety of sources including detection subsystem 22, reaction subsystem 24, operative structure 12 and motor assembly 16. The control subsystem may also include one or more sensors adapted to monitor selected parameters of machine 10. In addition, control subsystem 26 typically includes one or more instruments operable by a user to control the machine. The control subsystem is configured to control machine 10 in response to the inputs it receives.
  • [0070]
    Detection subsystem 22 is configured to detect one or more dangerous, or triggering, conditions during use of machine 10. For example, the detection subsystem may be configured to detect that a portion of the user's body is dangerously close to, or in contact with, a portion of cutting tool 14. As another example, the detection subsystem may be configured to detect the rapid movement of a workpiece due to kickback by the cutting tool, as is described in U.S. Provisional Patent Application Ser. Nos. 60/182,866, the disclosure of which is herein incorporated by reference. In some embodiments, detection subsystem 22 may inform control subsystem 26 of the dangerous condition, which then activates reaction subsystem 24. In other embodiments, the detection subsystem may be adapted to activate the reaction subsystem directly.
  • [0071]
    Once activated in response to a dangerous condition, reaction subsystem 24 is configured to engage operative structure 12 quickly to prevent serious injury to the user. It will be appreciated that the particular action to be taken by reaction subsystem 24 will vary depending on the type of machine 10 and/or the dangerous condition that is detected. For example, reaction subsystem 24 may be configured to do one or more of the following: stop the movement of cutting tool 14, disconnect motor assembly 16 from power source 20, place a barrier between the cutting tool and the user, or retract the cutting tool from its operating position, etc. The reaction subsystem may be configured to take a combination of steps to protect the user from serious injury. Placement of a barrier between the cutting tool and teeth is described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,206, entitled “Cutting Tool Safety System,” filed Aug. 14, 2000 by SD3, LLC, the disclosure of which is herein incorporated by reference.
  • [0072]
    The configuration of reaction subsystem 24 typically will vary depending on which action(s) are taken. In the exemplary embodiment depicted in FIG. 1, reaction subsystem 24 is configured to stop the movement of cutting tool 14 and includes a brake mechanism 28, a biasing mechanism 30, a restraining mechanism 32, and a release mechanism 34. Brake mechanism 28 is adapted to engage operative structure 12 under the urging of biasing mechanism 30. During normal operation of machine 10, restraining mechanism 32 holds the brake mechanism out of engagement with the operative structure. However, upon receipt of an activation signal by reaction subsystem 24, the brake mechanism is released from the restraining mechanism by release mechanism 34, whereupon, the brake mechanism quickly engages at least a portion of the operative structure to bring the cutting tool to a stop.
  • [0073]
    It will be appreciated by those of skill in the art that the exemplary embodiment depicted in FIG. 1 and described above may be implemented in a variety of ways depending on the type and configuration of operative structure 12. Turning attention to FIG. 2, one example of the many possible implementations of safety system 18 is shown. System 18 is configured to engage an operative structure having a cutting tool in the form of a circular blade 40 mounted on a rotating shaft or arbor 42. Blade 40 includes a plurality of cutting teeth (not shown) disposed around the outer edge of the blade. As described in more detail below, braking mechanism 28 is adapted to engage the teeth of blade 40 and stop the rotation of the blade. U.S. Provisional Patent Application Ser. No. 60/225,210, entitled “Translation Stop For Use In Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, the disclosure of which is herein incorporated by reference, describes other systems for stopping the movement of the cutting tool. U.S. Provisional Patent Application Ser. No. 60/225,058, entitled “Table Saw With Improved Safety System,” filed Aug. 14, 2000 by SD3, LLC, and U.S. Provisional Patent Application Ser. No. 60/225,057, entitled “Miter Saw With Improved Safety System,” filed Aug. 14, 2000 by SD3, LLC, the disclosures of which are herein incorporated by reference, describe safety system 18 in the context of particular types of machines 10.
  • [0074]
    In the exemplary implementation, detection subsystem 22 is adapted to detect the dangerous condition of the user coming into contact with blade 40. The detection subsystem includes a sensor assembly, such as contact detection plates 44 and 46, capacitively coupled to blade 40 to detect any contact between the user's body and the blade. Typically, the blade, or some larger portion of cutting tool 14 is electrically isolated from the remainder of machine 10. Alternatively, detection subsystem 22 may include a different sensor assembly configured to detect contact in other ways, such as optically, resistively, etc. In any event, the detection subsystem is adapted to transmit a signal to control subsystem 26 when contact between the user and the blade is detected. Various exemplary embodiments and implementations of detection subsystem 22 are described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,200, entitled “Contact Detection System For Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, and U.S. Provisional Patent Application Ser. No. 60/225,211, entitled “Apparatus And Method For Detecting Dangerous Conditions In Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, the disclosures of which are herein incorporated by reference.
  • [0075]
    Control subsystem 26 includes one or more instruments 48 that are operable by a user to control the motion of blade 40. Instruments 48 may include start/stop switches, speed controls, direction controls, etc. Control subsystem 26 also includes a logic controller 50 connected to receive the user's inputs via instruments 48. Logic controller 50 is also connected to receive a contact detection signal from detection subsystem 22. Further, the logic controller may be configured to receive inputs from other sources (not shown) such as blade motion sensors, workpiece sensors, etc. In any event, the logic controller is configured to control operative structure 12 in response to the user's inputs through instruments 48. However, upon receipt of a contact detection signal from detection subsystem 22, the logic controller overrides the control inputs from the user and activates reaction subsystem 24 to stop the motion of the blade. Various exemplary embodiments and implementations of control subsystem 26 are described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,059, entitled “Logic Control For Fast Acting Safety System,” filed Aug. 14, 2000 by SD3, LLC, and U.S. Provisional Patent Application Ser. No. 60/225,094, entitled “Motion Detecting System For Use In Safety System For Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, the disclosures of which are herein incorporated by reference.
  • [0076]
    In the exemplary implementation, brake mechanism 28 includes a pawl 60 mounted adjacent the edge of blade 40 and selectively moveable to engage and grip the teeth of the blade. Pawl 60 may be constructed of any suitable material adapted to engage and stop the blade. As one example, the pawl may be constructed of a relatively high strength thermoplastic material such as polycarbonate, ultrahigh molecular weight polyethylene (UHMW) or Acrylonitrile Butadiene Styrene (ABS), etc., or a metal such as aluminum, etc. It will be appreciated that the construction of pawl 60 will vary depending on the configuration of blade 40. In any event, the pawl is urged into the blade by a biasing mechanism in the form of a spring 66. In the illustrative embodiment shown in FIG. 2, pawl 60 is pivoted into the teeth of blade 40. It should be understood that sliding or rotary movement of pawl 60 might also be used. The spring is adapted to urge pawl 60 into the teeth of the blade with sufficient force to grip the blade and quickly bring it to a stop.
  • [0077]
    The pawl is held away from the edge of the blade by a restraining mechanism in the form of a fusible member 70. The fusible member is constructed of a suitable material adapted to restrain the pawl against the bias of spring 66, and also adapted to melt under a determined electrical current density. Examples of suitable materials for fusible member 70 include NiChrome wire, stainless steel wire, etc. The fusible member is connected between the pawl and a contact mount 72. Preferably, fusible member 70 holds the pawl relatively close to the edge of the blade to reduce the distance the pawl must travel to engage the blade. Positioning the pawl relatively close to the edge of the blade reduces the time required for the pawl to engage and stop the blade. Typically, the pawl is held approximately 1/32-inch to ¼-inch from the edge of the blade by fusible member 70, however other pawl-to-blade spacings may also be used within the scope of the invention.
  • [0078]
    Pawl 60 is released from its unactuated, or cocked, position to engage blade 40 by a release mechanism in the form of a firing subsystem 76. The firing subsystem is coupled to contact mount 72, and is configured to melt fusible member 70 by passing a surge of electrical current through the fusible member. Firing subsystem 76 is coupled to logic controller 50 and activated by a signal from the logic controller. When the logic controller receives a contact detection signal from detection subsystem 22, the logic controller sends an activation signal to firing subsystem 76, which melts fusible member 70, thereby releasing the pawl to stop the blade. Various exemplary embodiments and implementations of reaction subsystem 24 are described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,056, entitled “Firing Subsystem For Use In Fast Acting Safety System,” filed Aug. 14, 2000 by SD3, LLC, U.S. Provisional Patent Application Ser. No. 60/225,170, entitled “Spring-Biased Brake Mechanism for Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, and U.S. Provisional Patent Application Ser. No. 60/225,169, entitled “Brake Mechanism For Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, the disclosures of which are herein incorporated by reference.
  • [0079]
    Other systems can also be used to shift the pawl or pawls into contact with the blade, and firing system 76 may also be used to trigger some action other than burning a fusible member. For example, firing system 76 can fire a small explosive charge to move a pawl. FIG. 15 shows a relatively small, self-contained explosive charge 660 in the form of a squib or detonator that can be used to drive pawl 60 against a blade. An example of a suitable explosive charge is an M-100 detonator available, for example, from Stresau Laboratory, Inc., of Spooner, Wis. Although any suitable explosive charge system may be used, the exemplary embodiment preferably uses a self-contained charge or squib to increase safety and focus the force of the explosion along the direction of movement of the pawl. A trigger line 662 extends from the charge, and it may be connected to firing system 76 to trigger detonation.
  • [0080]
    Explosive charge 660 can be used to move pawl 60 by inserting the charge between the pawl and a stationary block 664 adjacent the charge. When the charge detonates, the pawl is pushed away from the block. A compression spring 66 is placed between the block and pawl to ensure the pawl does not bounce back from the blade when the charge is detonated. Prior to detonation, the pawl is held away from the blade by the friction-fit of the charge in both the block and pawl. However, the force created upon detonation of the charge is more than sufficient to overcome the friction fit. Alternatively, the pawl may be held away from the blade by other mechanisms such as a frangible member, gravity, a spring between the pawl and block, etc.
  • [0081]
    Firing system 76 may also trigger a DC solenoid, which can be over-driven with a current surge to create a rapid displacement, a pressurized air or gas cylinder to supply the pressure in place of the spring or charge, or an electromagnet to either repel the pawl against the blade or to release a spring-loaded pawl toward the blade.
  • [0082]
    It will be appreciated that activation of the brake mechanism will require the replacement of one or more portions of safety system 18. For example, pawl 60 and fusible member 70 typically must be replaced before the safety system is ready to be used again. Thus, it may be desirable to construct one or more portions of safety system 18 in a cartridge that can be easily replaced. For example, in the exemplary implementation depicted in FIG. 2, safety system 18 includes a replaceable cartridge 80 having a housing 82. Pawl 60, spring 66, fusible member 70 and contact mount 72 are all mounted within housing 82. Alternatively, other portions of safety system 18 may be mounted within the housing. In any event, after the reaction system has been activated, the safety system can be reset by replacing cartridge 80. The portions of safety system 18 not mounted within the cartridge may be replaced separately or reused as appropriate. Various exemplary embodiments and implementations of a safety system using a replaceable cartridge are described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,201, entitled “replaceable Brake Mechanism For Power Equipment,” filed Aug. 14, 2000 by SD3, LLC, and U.S. Provisional Patent Application Ser. No. 60/225,212, entitled “Brake Positioning System,” filed Aug. 14, 2000 by SD3, LLC, the disclosures of which are herein incorporated by reference.
  • [0083]
    While one particular implementation of safety system 18 has been described, it will be appreciated that many variations and modifications are possible within the scope of the invention. Many such variations and modifications are described in U.S. Provisional Patent Application Ser. Nos. 60/182,866 and 60/157,340, the disclosures of which are herein incorporated by reference.
  • [0084]
    As briefly mentioned above, reaction subsystem 24 can be configured with a retraction system to retract or move a cutting tool away from the point of accidental contact with a user. Moving away from the point of accidental contact reduces the time the cutting tool is in contact with the user, thereby minimizing any injury to the user. Moving the cutting tool away from the point of accidental contact also prevents the cutting tool from moving toward the user, which could increase any injury to the user. For example, a spinning blade in a miter saw has substantial angular momentum, and that angular momentum could cause the blade to move downward toward a user when a brake pawl hits the blade. The spinning blade in a table saw also has substantial angular momentum that could cause the blade to move upward toward a user when a brake pawl hits the blade, depending on the position of the brake, the weight of the blade and the amount of play in the structure supporting the blade. Preventing any such movement lessens the potential injury to the user. A retraction system may be used in addition to or instead of other safety mechanisms.
  • [0085]
    FIGS. 3 and 4 show side views of a table saw configured with both a retraction system and a braking mechanism. A blade 300 is mounted on an arbor 301 to spin in the direction of arrow 302. A table 303 (not shown in FIG. 4), which defines the work surface or cutting region for the table saw, is adjacent the blade and the blade extends above the table. A support structure 304 may support blade 300 and arbor 301 in any known way, or as described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,058, titled “Table Saw with Improved Safety System,” filed Aug. 14, 2000.
  • [0086]
    Blade 300 is configured to pivot up and down so that a user can position the blade to extend above the table as needed. The blade pivots around a pin 305. A user may pivot the blade to adjust its position by turning a shaft 306 on which a worm gear 307 is mounted. The worm gear is mounted on the shaft so that it turns with the shaft, but so that it may slide on the shaft when necessary, as explained below. Worm gear 307 is mounted on shaft 306 like a collar, with the shaft extending through a longitudinal hole in the worm gear. The worm gear is held in place during normal operation of the saw by a spring clip 308, which is positioned in a groove or channel 309 on the worm gear and which also engages a detent or shoulder on shaft 306 to hold the worm gear in place. The worm gear engages an arcuate rack 310 that supports an arbor block 311, which in turn supports arbor 301 and blade 300. Thus, when a user turns shaft 306, such as by turning a knob attached to the shaft (not shown), worm gear 307 moves arbor block 311 and the blade up or down, depending on the direction that the worm gear is turned.
  • [0087]
    A brake cartridge 312 is mounted in the saw adjacent blade 300. The brake cartridge includes a pawl 314 biased toward blade 300 by a spring 316. The pawl is held away from blade 300 by a release mechanism 318, as described generally above and as described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,170, entitled “Spring-Biased Brake Mechanism for Power Equipment,” U.S. Provisional Patent Application Ser. No. 60/225,169, entitled “Brake Mechanism for Power Equipment,” U.S. Provisional Patent Application Ser. No. 60/225,201, entitled “Replaceable Brake Mechanism for Power Equipment,” and U.S. Provisional Patent Application Ser. No. 60/225,212, entitled “Brake Positioning System,” all filed Aug. 14, 2000. The cartridge is configured so that the release mechanism releases the pawl into the blade upon the receipt of a detection signal, as explained generally above and as explained in more detail in U.S. Provisional Patent Application Ser. No. 60/225,056, titled “Firing Subsystem for use in a Fast-Acting Safety System,” filed Aug. 14, 2000.
  • [0088]
    Brake cartridge 312 is positioned on the blade's pivot axis so that pawl 314 can move around pin 305. Thus, when pawl 314 hits the blade, the angular momentum of the blade is transferred to the arbor block, and the blade, arbor block, rack and cartridge try to retract or move down in the direction of arrow 320. Alternatively, the cartridge may be positioned on a pin different from pin 305, but that still pivots with the blade.
  • [0089]
    The blade will move down to the extent permitted by the contact between rack 310 and worm gear 307. If the worm gear is fixed in place, the downward movement of the blade may strip teeth on the rack and/or worm gear, and may prevent the blade from moving down as far as desired. In the embodiment shown in FIGS. 3 and 4, the worm gear is adapted to snap free and move on shaft 306 when the pawl hits the blade.
  • [0090]
    When the pawl hits the blade, the resultant angular momentum impulse causes spring clip 308 to snap loose, allowing the worm gear to slide down the shaft toward an end 322 of the shaft. The spring clip snaps loose because the rack moves down when the blade is stopped, and the rack contacts the worm gear and forces the worm gear to move. The force of the rack against the worm gear causes the spring clip to snap loose. The worm gear is put back in place by moving it back along shaft 306 until the spring clip snaps into place on the shaft.
  • [0091]
    The table saw shown in FIGS. 3 and 4 also includes a support 326 configured with a seat or region 328 in which is placed an impact-absorbing material 330. The support is positioned under the arbor and arbor block so that when the blade retracts, the arbor block strikes impact-absorbing material 330. Support 326 and impact absorbing material 330 act as a barrier to stop the downward movement of the blade. The support is positioned so that blade 300 may retract a sufficient distance. The impact-absorbing material can be any one of a number of cushioning materials, such as rubber, dense foam, plastic, etc. One material found to be suitable is available under the part number C-1002-06 from AearoEAR, of Indianapolis, Ind. Alternatively, impact-absorbing material 330 may be attached to the undersurface of the arbor block instead of on support 326. Additionally, support 326 may take many forms. In fact, shaft 306 may be configured and positioned so that it provides a surface to stop the downward movement of the blade.
  • [0092]
    FIG. 4 also shows a splitter 335 that extends above table 303 behind blade 300 to prevent kickback. A blade guard may also substantially enclose blade 300. FIG. 4 further shows a housing 337 for electronic components relating to the safety system, and a motor mount 339, which are not shown in FIG. 3.
  • [0093]
    In the construction described above, the angular momentum of the blade causes the blade, arbor block and cartridge to all pivot down away from the cutting region when the pawl strikes the blade. Thus, the angular momentum of the blade causes the retraction. Blade 300 is permitted to move downward a sufficient distance so that the blade is completely retracted. In independent experiments, the safety system depicted in FIGS. 3 and 4 and described above has been shown to retract the blade completely below table 303 within approximately 14 milliseconds after contact is detected. Indeed the downward motion of the blade during retraction is too fast to detect with the human eye, i.e., the blade disappears below table 303 with no discernable transition or downward motion. The ability of the blade to retract minimizes any injury from accidental contact with the blade.
  • [0094]
    FIG. 5 shows another embodiment of a retraction system used with a brake pawl. A saw 331 includes a blade 300 and a brake cartridge 312 housing a brake pawl 314. The cartridge and pawl are mounted to the frame of the saw by a pin 332. The pin is mounted to the saw in such a way that it may not pivot up and down with the blade. When the blade hits the pawl, the blade climbs down the pawl or in other words, moves generally around the point of contact with the pawl. The pawl and blade do not pivot downward together, as in the embodiment shown in FIGS. 3 and 4, because the pawl is fixed to the frame of the saw. In this embodiment, the blade retracts by “climbing” down the pawl.
  • [0095]
    Another embodiment of a retraction system comprises a compressible bushing. Typically, a blade 300 in a table saw, miter saw or other machine is mounted to an arbor over a bushing 333, as shown in FIG. 6. A locking nut, washers and an arbor flange are used to secure the blade to the arbor. Bushing 333 may be constructed from a material that is soft enough to deform when the blade is stopped suddenly. For example, depending on the type of braking system used, a substantial radial impact load may be transmitted to the arbor when the brake is actuated. A deformable bushing can be used to absorb some of this impact and reduce the chance of damage to the arbor. In addition, proper positioning of the brake in combination with a deformable bushing may be employed to cause the blade to move away from the user upon activation of the brake. Where a plastic bushing is placed between the blade and the arbor, the substantial force created by stopping the blade almost instantly may cause the bushing to deform. Typically, the edge of the mounting hole of the blade will bite into the bushing as the blade attempts to rotate about the pawl. Therefore, if the pawl is mounted at the back of the blade, then the blade will tend to move downward into the bushing and away from the user when the pawl engages the blade.
  • [0096]
    FIGS. 7 and 8 show a miter saw equipped with both a brake and a retraction system.
  • [0097]
    The miter saw is configured with a pivotal motor assembly to allow the blade to move upward into the housing upon engagement with a brake pawl 348. Motor assembly 350 is connected to housing 352 via pivot bolt 354, allowing the motor assembly to pivot about bolt 354 in the direction of blade rotation. A spring 356 is compressed between the motor assembly and an anchor 358 to bias the motor assembly against the direction of blade rotation. The motor assembly may include a lip 360, which slides against a flange 362 on the housing to hold the end of the motor assembly opposite the pivot bolt against the housing.
  • [0098]
    When the saw is in use, spring 356 holds the motor assembly in a normal position rotated fully counter to the direction of blade rotation. However, once the pawl is released to engage the blade, the motor assembly and blade pivot upward against the bias of the spring. In this embodiment, the pawl is positioned at the front of the blade so that the pivot bolt 354 is between the pawl and the arbor. This arrangement encourages the blade to move upward into the housing when stopped. The spring is selected to be sufficiently strong to hold the motor assembly down when cutting through a workpiece, but sufficiently compressible to allow the blade and motor assembly to move upward when the blade is stopped. Of course, the blade and motor assembly may be configured in any of a variety of ways to at least partially absorb the angular momentum of the blade.
  • [0099]
    FIG. 9 shows an alternative configuration of a miter saw adapted to move away from an accidental contact with a user by absorbing the angular momentum of the blade. In this configuration, the miter saw includes two swing arms 370 and 372. One end 374 of each swing arm 370, 372 is connected to base 376, and the opposite end 378 of each swing arm is connected to housing 380, the blade, and/or the motor assembly (not shown). The position of the swing arms relative to each other may vary depending on the swing arm motion desired. In FIG. 9, swing arm 370 is connected to base 376 somewhat below and forward of swing arm 372. Typically, the motor assembly is rigidly attached to end 378 of swing arm 370, while housing 380 is connected to rotate about end 378 of swing arm 370. End 378 of swing arm 372 is connected only to the housing. Alternatively, the motor assembly may be connected to rotate about end 378 of swing arm 370 along with the housing.
  • [0100]
    The geometry of the configuration shown in FIG. 9 causes the housing and/or motor assembly to rotate as the swing arms pivot. Significantly, when the swing arms move upward, the housing and/or motor assembly rotate in the same direction in which the blade rotates during cutting. As a result, when a brake pawl engages the blade and transfers the angular momentum of the blade to the housing and/or motor assembly, the housing and/or motor assembly tend to rotate in the same direction as the blade. This causes the swing arms to pivot upward, drawing the blade away from the workpiece and the user's body. Thus, the miter saw configuration illustrated in FIG. 9 is adapted to absorb the angular momentum of the blade and translate that angular momentum into an upward force on the swing arms.
  • [0101]
    In any of the systems described above, a spring or other force can be used to push the blade away from the point of contact with the user. The spring could be released by a mechanism similar to the mechanism that releases the pawl to strike the blade. FIGS. 10-12 show how a spring may be used to retract a blade in a table saw. FIG. 10 is a top view and FIGS. 11 and 12 are side views of an arbor block 381 holding an arbor 382 used to drive a blade (not shown). Arbor block 381 is pivotally mounted to pin 383 so that the arbor block and blade may pivot up and down to adjust the position of the blade in the saw.
  • [0102]
    A segment gear 384, like rack 310 described above in connection with FIGS. 3 and 4, is also mounted on pin 383, and is connected to arbor block 381 in the manner described below, to raise and lower the arbor. Segment gear 384 includes a side portion 385 positioned substantially perpendicularly to the plane of arbor block 381, and a top portion 386 positioned over arbor block 381. The side portion 385 includes gear teeth 387 to engage a worm gear to raise and lower the arbor block. Side portion 385 and top portion 386 are connected to each other and move together. Top portion 386 extends over the top of the entire arbor block, as shown. The arbor block is constructed with a region to accommodate top portion 386 so that top portion 386 does not extend substantially above the arbor block, which could limit the ability of the arbor block and blade to pivot upward when desired, such as by contacting the underside of a table in a table saw.
  • [0103]
    A pocket 388 is formed in arbor block 381 to house a spring 389. In the position shown in FIG. 11, spring 389 is compressed between top portion 386 of segment gear 384 and arbor block 381 because the segment gear and arbor block are coupled together.
  • [0104]
    The segment gear and arbor block are coupled by a compound linkage having, as shown in FIG. 12, a first arm 390 attached at one end to the arbor block and at its other end to a second arm 391. The second arm, in turn, is attached to top portion 386 of segment gear 384, as shown. First and second arms 390 and 391 are hingedly connected to each other, and to the arbor block and segment gear. The arms are configured so that the force of the spring pushing apart the arbor block and the top portion of the segment gear biases the first and second arms in such a way that the arms want to move. A fusible member 392, which may take the form of a wire as described above, restrains the arms from movement. Of course, numerous different linkages may be used, and numerous types and configurations of fusible members or other release mechanisms may be used. The linkage may be selected to provide a sufficient mechanical advantage so that the arbor block and top portion of the segment gear may be held together with as thin a fusible member as possible, so that the fusible member may be burned as easily as possible. Various analogous compound linkages are described in U.S. Provisional Patent Application Ser. No. 60/225,170, entitled “Spring-Biased Brake Mechanism for Power Equipment,” filed Aug. 14, 2000. The fusible member may be burned by a system as described above, or as described in more detail in U.S. Provisional Patent Application Ser. No. 60/225,056, entitled “Firing Subsystem for Use in Fast-Acting Safety System,” filed Aug. 14, 2000, the disclosure of which is hereby incorporated by reference. The compound linkage and the fusible member are preferably configured so that they accommodate spring forces of 100 to 500 pounds or more. In other embodiments, the restraining member may include various mechanical linkages, or may be part of various actuators, and those linkages and/or actuators may be released or fired by solenoids, gas cylinders, electromagnets, and/or explosives, as explained in U.S. Provisional Patent Application Ser. No. 60/302,916, entitled “Actuators for Use in Fast-Acting Safety Systems,” filed Jul. 3, 2001, the disclosure of which is hereby incorporated by reference.
  • [0105]
    When the fusible member is burned, the compound linkage is free to move, and the spring pushes arbor block 381 down, away from top portion 386 of the segment gear, as shown by the dashed lines in FIG. 11, thereby retracting the blade. The stronger the spring, the faster the blade will be retracted. The segment gear does not move because it is coupled through teeth 387 to a worm gear or some other structure.
  • [0106]
    Retracting a blade by a spring or some other force may be thought of as direct retraction. A spring or other force may be used with some other retraction system to increase the speed that a cutting tool retracts, or a spring or other force may be used as the sole means of retraction. The systems for direct retraction described above may be used on various pieces of equipment, including table saws, miter saws and band saws.
  • [0107]
    FIG. 13 is a schematic diagram of a system to retract the blade of a band saw. Typically, a band saw includes a main housing enclosing a pair of vertically spaced-apart wheels. The perimeter of each wheel is coated or covered in a high-friction material such as rubber, etc. A relatively thin, continuous loop blade tightly encircles both wheels. A workpiece is cut by passing it toward the blade in a cutting zone between the wheels. The workpiece is passed toward the blade on a table, which forms the bottom of the cutting zone.
  • [0108]
    The band saw shown in FIG. 13 includes roller 393 positioned adjacent the blade. The roller is configured to contact the blade and push the blade away from the point of accidental contact with a user. In addition, the roller may be configured to push the blade off the wheels, thereby stopping the motion of the blade. A top view of the roller is shown in FIG. 14 pushing against a blade in the direction of the arrow. The roller may be part of a cartridge, and may be released into the blade just as the pawls described above are released. The roller should have a diameter large enough so that the roller can roll over the teeth of the blade.
  • [0109]
    The systems for direct retraction of a cutting tool may also be implemented on hand-held circular saws. Such saws typically include a base plate that contacts a workpiece during sawing. The base plate supports the saw on the workpiece. The base plate may be configured so that it is pushed down when the blade contacts a user. The result of that action is to effectively retract the blade because the base plate would push the user away from the blade.
  • INDUSTRIAL APPLICABILITY
  • [0110]
    The present invention is applicable to power equipment, and specifically to woodworking equipment such as table saws, miter saws, band saws, circular saws, jointers, etc. The present invention provides a safety system wherein a cutting tool or other dangerous item is retracted upon the occurrence of a specified event, such as when accidental contact between a user and a blade is detected. Retraction of a cutting tool, for example, can minimize any injury from accidental contact with the cutting tool by reducing the amount of time the cutting tool is in contact with a user or by moving the cutting tool to a position where the user cannot contact it. A retraction system may be used in combination with other safety features to maximize the performance of an overall safety system. For example, a retraction system may be used with a system that quickly stops a cutting tool so that the cutting tool simultaneously stops and moves away from a user.
  • [0111]
    It is believed that the disclosure set forth above encompasses multiple distinct inventions with independent utility. While each of these inventions has been disclosed in its preferred form, the specific embodiments thereof as disclosed and illustrated herein are not to be considered in a limiting sense as numerous variations are possible. The subject matter of the inventions includes all novel and non-obvious combinations and subcombinations of the various elements, features, functions and/or properties disclosed herein. No single feature, function, element or property of the disclosed embodiments is essential to all of the disclosed inventions. Similarly, where the claims recite “a” or “a first” element or the equivalent thereof, such claims should be understood to include incorporation of one or more such elements, neither requiring nor excluding two or more such elements.
  • [0112]
    It is believed that the following claims particularly point out certain combinations and subcombinations that are directed to one of the disclosed inventions and are novel and non-obvious. Inventions embodied in other combinations and subcombinations of features, functions, elements and/or properties may be claimed through amendment of the present claims or presentation of new claims in this or a related application. Such amended or new claims, whether they are directed to a different invention or directed to the same invention, whether different, broader, narrower or equal in scope to the original claims, are also regarded as included within the subject matter of the inventions of the present disclosure.

Claims (20)

  1. 1. A cutting machine comprising:
    a blade configured to cut a workpiece;
    a detection system configured to detect a dangerous condition;
    a reaction system adapted to perform a specified action to mitigate possible injury from the dangerous condition; and
    an explosive to trigger the reaction system to perform the specified action when fired.
  2. 2. The cutting machine of claim 1, where the blade moves to cut a workpiece, and where the specified action is to stop the blade.
  3. 3. The cutting machine of claim 1, where the specified action is to cover the blade.
  4. 4. The cutting machine of claim 1, where the blade is configured to cut a workpiece in a work zone, and where the specified action is to retract the blade at least partially away from the workzone.
  5. 5. The cutting machine of claim 1, where the dangerous condition is contact between a person and the blade.
  6. 6. The cutting machine of claim 1, where the dangerous condition is proximity between a person and the blade.
  7. 7. The cutting machine of claim 1, where the blade is configured to cut a workpiece in a work zone, where the specified action is to retract the blade at least partially out of the workzone, and where the dangerous condition is contact between a person and the blade.
  8. 8. The cutting machine of claim 1, where the blade is configured to cut a workpiece in a work zone, where the specified action is to retract the blade at least partially out of the workzone, and where the dangerous condition is proximity between a person and the blade.
  9. 9. The cutting machine of claim 1, where the reaction system is configured so that firing the explosive causes at least a part of the reaction system to move.
  10. 10. The cutting machine of claim 1, further comprising a firing subsystem to fire the explosive upon detection of the dangerous condition.
  11. 11. A woodworking machine having a cutting region for cutting workpieces, comprising:
    a movable cutting tool for cutting workpieces in the cutting region;
    a detection system adapted to detect a dangerous condition between a person and the cutting tool; and
    a reaction system associated with the detection system and the cutting tool, where the reaction system is configured to pivot the cutting tool at least partially away from the cutting region upon detection of the dangerous condition by the detection system.
  12. 12. The woodworking machine of claim 11 where the dangerous condition is contact between a person and the cutting tool.
  13. 13. The woodworking machine of claim 11 where the dangerous condition is proximity of a person to the cutting tool.
  14. 14. The woodworking machine of claim 11 further comprising a rotatable arbor on which the cutting tool is mounted, an arbor block adapted to support the arbor, and a support structure to which the arbor block is pivotally mounted; and where the reaction system is configured to pivot the arbor block, arbor and cutting tool at least partially away from the cutting region upon detection of the dangerous condition by the detection system.
  15. 15. The woodworking machine of claim 14 where the cutting tool is a circular blade, where the machine is configured to cut a workpiece by moving the workpiece in a feed direction past the blade, and where the arbor block is pivotally mounted to the support structure downstream from the blade relative to the feed direction.
  16. 16. The woodworking machine of claim 14 where the cutting tool is a circular blade, where the machine is configured to cut a workpiece by moving the workpiece in a feed direction past the blade, and where the arbor block is mounted to the support structure at a pivot point behind the blade relative to the feed direction.
  17. 17. The woodworking machine of claim 14 where the cutting tool is a circular blade, where the machine is configured to cut a workpiece by moving the workpiece in a feed direction past the blade, where the support structure includes a trunnion to which the arbor block is pivotally mounted, and where the trunnion is positioned behind the blade relative to the feed direction.
  18. 18. A woodworking machine comprising:
    a table having a work surface defining a cutting region;
    a cutting tool positioned to extend at least partially into the cutting region;
    a detection system adapted to detect a dangerous condition between a person and the cutting tool; and
    a reaction system associated with the detection system and the cutting tool, where the reaction system is configured to retract the cutting tool completely below the work surface within approximately 14 milliseconds after the dangerous condition is detected by the detection system.
  19. 19. The woodworking machine of claim 18 where the dangerous condition is contact between a person and the cutting tool.
  20. 20. The woodworking machine of claim 18 where the dangerous condition is proximity of a person to the cutting tool.
US11542938 1999-10-01 2006-10-02 Safety methods for use in power equipment Abandoned US20070028733A1 (en)

Priority Applications (117)

Application Number Priority Date Filing Date Title
US15734099 true 1999-10-01 1999-10-01
US18286600 true 2000-02-16 2000-02-16
US22521200 true 2000-08-14 2000-08-14
US22521000 true 2000-08-14 2000-08-14
US22505600 true 2000-08-14 2000-08-14
US22508900 true 2000-08-14 2000-08-14
US22505700 true 2000-08-14 2000-08-14
US22520100 true 2000-08-14 2000-08-14
US22509400 true 2000-08-14 2000-08-14
US22505800 true 2000-08-14 2000-08-14
US22505900 true 2000-08-14 2000-08-14
US22520600 true 2000-08-14 2000-08-14
US22520000 true 2000-08-14 2000-08-14
US22516900 true 2000-08-14 2000-08-14
US22517000 true 2000-08-14 2000-08-14
US22521100 true 2000-08-14 2000-08-14
US23345900 true 2000-09-18 2000-09-18
US09676190 US7055417B1 (en) 1999-10-01 2000-09-29 Safety system for power equipment
US27001101 true 2001-02-20 2001-02-20
US27094201 true 2001-02-22 2001-02-22
US27094101 true 2001-02-22 2001-02-22
US27317701 true 2001-03-02 2001-03-02
US27317801 true 2001-03-02 2001-03-02
US27390201 true 2001-03-06 2001-03-06
US27559401 true 2001-03-13 2001-03-13
US27558301 true 2001-03-13 2001-03-13
US27559501 true 2001-03-13 2001-03-13
US27931301 true 2001-03-27 2001-03-27
US29210001 true 2001-05-17 2001-05-17
US29208101 true 2001-05-17 2001-05-17
US29820701 true 2001-06-13 2001-06-13
US30293701 true 2001-07-02 2001-07-02
US30291601 true 2001-07-03 2001-07-03
US30620201 true 2001-07-18 2001-07-18
US30775601 true 2001-07-25 2001-07-25
US30849201 true 2001-07-27 2001-07-27
US31214101 true 2001-08-13 2001-08-13
US09929221 US7284467B2 (en) 2000-08-14 2001-08-13 Apparatus and method for detecting dangerous conditions in power equipment
US09929227 US7308843B2 (en) 2000-08-14 2001-08-13 Spring-biased brake mechanism for power equipment
US09929425 US7137326B2 (en) 2000-08-14 2001-08-13 Translation stop for use in power equipment
US09929236 US7610836B2 (en) 2000-08-14 2001-08-13 Replaceable brake mechanism for power equipment
US09929244 US6857345B2 (en) 2000-08-14 2001-08-13 Brake positioning system
US09929238 US20020017179A1 (en) 2000-08-14 2001-08-13 Miter saw with improved safety system
US09929237 US7600455B2 (en) 2000-08-14 2001-08-13 Logic control for fast-acting safety system
US09929242 US7509899B2 (en) 2000-08-14 2001-08-13 Retraction system for use in power equipment
US09929240 US7100483B2 (en) 2000-08-14 2001-08-13 Firing subsystem for use in a fast-acting safety system
US09929241 US7024975B2 (en) 2000-08-14 2001-08-13 Brake mechanism for power equipment
US09929226 US6920814B2 (en) 2000-08-14 2001-08-13 Cutting tool safety system
US09929426 US7210383B2 (en) 2000-08-14 2001-08-13 Detection system for power equipment
US09929234 US7225712B2 (en) 2000-08-14 2001-08-13 Motion detecting system for use in a safety system for power equipment
US09929235 US7350444B2 (en) 2000-08-14 2001-08-13 Table saw with improved safety system
US09955418 US6957601B2 (en) 2000-08-14 2001-09-17 Translation stop for use in power equipment
US32397501 true 2001-09-21 2001-09-21
US32472901 true 2001-09-24 2001-09-24
US33597001 true 2001-11-13 2001-11-13
US10047066 US6945148B2 (en) 2000-09-29 2002-01-14 Miter saw with improved safety system
US10050085 US20020056349A1 (en) 2000-09-29 2002-01-14 Miter saw with improved safety system
US10051782 US6877410B2 (en) 2000-09-29 2002-01-15 Miter saw with improved safety system
US34998902 true 2002-01-16 2002-01-16
US10053390 US7377199B2 (en) 2000-09-29 2002-01-16 Contact detection system for power equipment
US35179702 true 2002-01-25 2002-01-25
US10100211 US9724840B2 (en) 1999-10-01 2002-03-13 Safety systems for power equipment
US10146527 US9927796B2 (en) 2001-05-17 2002-05-15 Band saw with improved safety system
US10172553 US7231856B2 (en) 2001-06-13 2002-06-13 Apparatus and method for detecting dangerous conditions in power equipment
US10189031 US7171879B2 (en) 2001-07-02 2002-07-02 Discrete proximity detection system
US10189027 US7712403B2 (en) 2001-07-03 2002-07-02 Actuators for use in fast-acting safety systems
US10197975 US20030015253A1 (en) 2001-07-18 2002-07-18 Router with improved safety system
US10202928 US7000514B2 (en) 2001-07-27 2002-07-25 Safety systems for band saws
US10205164 US6945149B2 (en) 2001-07-25 2002-07-25 Actuators for use in fast-acting safety systems
US10215929 US20030037651A1 (en) 2001-08-13 2002-08-09 Safety systems for power equipment
US40613802 true 2002-08-27 2002-08-27
US10243042 US7197969B2 (en) 2001-09-24 2002-09-13 Logic control with test mode for fast-acting safety system
US10251576 US20030056853A1 (en) 2001-09-21 2002-09-20 Router with improved safety system
US10292607 US7077039B2 (en) 2001-11-13 2002-11-12 Detection system for power equipment
US10341260 US20030140749A1 (en) 2002-01-25 2003-01-13 Brake Pawls for power equipment
US10345630 US20030131703A1 (en) 2002-01-16 2003-01-15 Apparatus and method for detecting dangerous conditions in power equipment
US45215903 true 2003-03-05 2003-03-05
US39233903 true 2003-03-18 2003-03-18
US10643296 US20040040426A1 (en) 2002-08-27 2003-08-18 Miter saw with improved safety system
US49656803 true 2003-08-20 2003-08-20
US49655003 true 2003-08-20 2003-08-20
US49657403 true 2003-08-20 2003-08-20
US53379103 true 2003-12-31 2003-12-31
US53357503 true 2003-12-31 2003-12-31
US53359803 true 2003-12-31 2003-12-31
US53381103 true 2003-12-31 2003-12-31
US53385203 true 2003-12-31 2003-12-31
US54037704 true 2004-01-29 2004-01-29
US10785361 US6997090B2 (en) 2001-08-13 2004-02-23 Safety systems for power equipment
US10794161 US7098800B2 (en) 2003-03-05 2004-03-04 Retraction system and motor position for use with safety systems for power equipment
US10923290 US7472634B2 (en) 2003-08-20 2004-08-20 Woodworking machines with overmolded arbors
US10923282 US20050041359A1 (en) 2003-08-20 2004-08-20 Motion detecting system for use in a safety system for power equipment
US10923273 US7350445B2 (en) 2003-08-20 2004-08-20 Brake cartridge for power equipment
US10932339 US7290472B2 (en) 2002-01-14 2004-09-01 Miter saw with improved safety system
US10984643 US8061245B2 (en) 2000-09-29 2004-11-08 Safety methods for use in power equipment
US11027254 US20050139056A1 (en) 2003-12-31 2004-12-31 Fences for table saws
US11026006 US8459157B2 (en) 2003-12-31 2004-12-31 Brake cartridges and mounting systems for brake cartridges
US11027322 US20050139459A1 (en) 2003-12-31 2004-12-31 Switch box for power tools with safety systems
US11026114 US7707920B2 (en) 2003-12-31 2004-12-31 Table saws with safety systems
US11027600 US7536238B2 (en) 2003-12-31 2004-12-31 Detection systems for power equipment
US11045972 US7827890B2 (en) 2004-01-29 2005-01-28 Table saws with safety systems and systems to mount and index attachments
US11061162 US7228772B2 (en) 2000-08-14 2005-02-18 Brake positioning system
US66748505 true 2005-03-31 2005-03-31
US11098984 US7353737B2 (en) 2001-08-13 2005-04-04 Miter saw with improved safety system
US11190111 US7357056B2 (en) 2000-09-29 2005-07-25 Cutting tool safety system
US11208214 US7784507B2 (en) 2000-09-29 2005-08-19 Router with improved safety system
US11218356 US7621205B2 (en) 1999-10-01 2005-09-02 Band saw with safety system
US11256757 US8065943B2 (en) 2000-09-18 2005-10-24 Translation stop for use in power equipment
US11353423 US20060123960A1 (en) 2001-08-13 2006-02-13 Safety systems for power equipment
US11395502 US20060219076A1 (en) 2005-03-31 2006-03-31 Table saw throat plates and table saws including the same
US11401050 US7788999B2 (en) 1999-10-01 2006-04-10 Brake mechanism for power equipment
US11401774 US7525055B2 (en) 1999-10-01 2006-04-11 Switch box for power tools with safety systems
US11445548 US7347131B2 (en) 1999-10-01 2006-06-02 Miter saw with improved safety system
US11447449 US20060225551A1 (en) 1999-10-01 2006-06-05 Safety system for power equipment
US11487717 US7421315B2 (en) 2001-11-13 2006-07-17 Detection system for power equipment
US11506260 US7359174B2 (en) 2000-08-14 2006-08-18 Motion detecting system for use in a safety system for power equipment
US11542938 US20070028733A1 (en) 1999-10-01 2006-10-02 Safety methods for use in power equipment

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
US11542938 US20070028733A1 (en) 1999-10-01 2006-10-02 Safety methods for use in power equipment
US12313162 US7789002B2 (en) 2000-09-29 2008-11-17 Table saw with improved safety system
US12800607 US7895927B2 (en) 1999-10-01 2010-05-19 Power equipment with detection and reaction systems
US12806830 US8191450B2 (en) 2000-08-14 2010-08-20 Power equipment with detection and reaction systems
US12806829 US9522476B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12806836 US8196499B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12807146 US8291797B2 (en) 1999-10-01 2010-08-27 Table saw with improved safety system
US12807147 US8402869B2 (en) 1999-10-01 2010-08-27 Brake mechanism for power equipment
US13442290 US8408106B2 (en) 1999-10-01 2012-04-09 Method of operating power equipment with detection and reaction systems
US13854270 US20170190012A9 (en) 1999-10-01 2013-04-01 Power equipment with detection and reaction systems
US14862571 US9925683B2 (en) 1999-10-01 2015-09-23 Table saws
US15357928 US9969014B2 (en) 1999-10-01 2016-11-21 Power equipment with detection and reaction systems
US15362388 US9878380B2 (en) 1999-10-01 2016-11-28 Table saw throat plates and table saws including the same

Related Parent Applications (6)

Application Number Title Priority Date Filing Date
US09929242 Continuation US7509899B2 (en) 2000-08-14 2001-08-13 Retraction system for use in power equipment
US10984643 Continuation US8061245B2 (en) 1999-10-01 2004-11-08 Safety methods for use in power equipment
US11348580 Continuation US20060123964A1 (en) 1999-10-01 2006-02-06 Table saw with improved safety system
US11401774 Continuation US7525055B2 (en) 1999-10-01 2006-04-11 Switch box for power tools with safety systems
US11445548 Continuation US7347131B2 (en) 1999-10-01 2006-06-02 Miter saw with improved safety system
US11506260 Continuation US7359174B2 (en) 2000-08-14 2006-08-18 Motion detecting system for use in a safety system for power equipment

Related Child Applications (10)

Application Number Title Priority Date Filing Date
US10215929 Continuation US20030037651A1 (en) 2001-08-13 2002-08-09 Safety systems for power equipment
US10785361 Continuation US6997090B2 (en) 2001-08-13 2004-02-23 Safety systems for power equipment
US10794161 Continuation US7098800B2 (en) 2003-03-05 2004-03-04 Retraction system and motor position for use with safety systems for power equipment
US12313162 Continuation US7789002B2 (en) 1999-10-01 2008-11-17 Table saw with improved safety system
US12800607 Continuation US7895927B2 (en) 1999-10-01 2010-05-19 Power equipment with detection and reaction systems
US12806829 Continuation US9522476B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12806836 Continuation US8196499B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12806830 Continuation US8191450B2 (en) 1997-08-04 2010-08-20 Power equipment with detection and reaction systems
US12807146 Continuation US8291797B2 (en) 1999-10-01 2010-08-27 Table saw with improved safety system
US12807147 Continuation US8402869B2 (en) 1999-10-01 2010-08-27 Brake mechanism for power equipment

Publications (1)

Publication Number Publication Date
US20070028733A1 true true US20070028733A1 (en) 2007-02-08

Family

ID=27585540

Family Applications (15)

Application Number Title Priority Date Filing Date
US09929426 Active 2024-02-10 US7210383B2 (en) 2000-08-14 2001-08-13 Detection system for power equipment
US11445548 Active US7347131B2 (en) 1999-10-01 2006-06-02 Miter saw with improved safety system
US11542938 Abandoned US20070028733A1 (en) 1999-10-01 2006-10-02 Safety methods for use in power equipment
US11796819 Active 2023-09-16 US8079292B2 (en) 2000-08-14 2007-04-30 Detection system for power equipment
US12800607 Active US7895927B2 (en) 1999-10-01 2010-05-19 Power equipment with detection and reaction systems
US12806830 Active US8191450B2 (en) 1997-08-04 2010-08-20 Power equipment with detection and reaction systems
US12806836 Active US8196499B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12806829 Active 2021-04-10 US9522476B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12807147 Active US8402869B2 (en) 1999-10-01 2010-08-27 Brake mechanism for power equipment
US12807146 Active 2020-10-01 US8291797B2 (en) 1999-10-01 2010-08-27 Table saw with improved safety system
US13374290 Active US8438958B2 (en) 2000-08-14 2011-12-19 Detection system for power equipment
US13442290 Active US8408106B2 (en) 1999-10-01 2012-04-09 Method of operating power equipment with detection and reaction systems
US14862571 Active US9925683B2 (en) 1999-10-01 2015-09-23 Table saws
US15357928 Active US9969014B2 (en) 1999-10-01 2016-11-21 Power equipment with detection and reaction systems
US15362388 Active US9878380B2 (en) 1999-10-01 2016-11-28 Table saw throat plates and table saws including the same

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US09929426 Active 2024-02-10 US7210383B2 (en) 2000-08-14 2001-08-13 Detection system for power equipment
US11445548 Active US7347131B2 (en) 1999-10-01 2006-06-02 Miter saw with improved safety system

Family Applications After (12)

Application Number Title Priority Date Filing Date
US11796819 Active 2023-09-16 US8079292B2 (en) 2000-08-14 2007-04-30 Detection system for power equipment
US12800607 Active US7895927B2 (en) 1999-10-01 2010-05-19 Power equipment with detection and reaction systems
US12806830 Active US8191450B2 (en) 1997-08-04 2010-08-20 Power equipment with detection and reaction systems
US12806836 Active US8196499B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12806829 Active 2021-04-10 US9522476B2 (en) 1999-10-01 2010-08-20 Power equipment with detection and reaction systems
US12807147 Active US8402869B2 (en) 1999-10-01 2010-08-27 Brake mechanism for power equipment
US12807146 Active 2020-10-01 US8291797B2 (en) 1999-10-01 2010-08-27 Table saw with improved safety system
US13374290 Active US8438958B2 (en) 2000-08-14 2011-12-19 Detection system for power equipment
US13442290 Active US8408106B2 (en) 1999-10-01 2012-04-09 Method of operating power equipment with detection and reaction systems
US14862571 Active US9925683B2 (en) 1999-10-01 2015-09-23 Table saws
US15357928 Active US9969014B2 (en) 1999-10-01 2016-11-21 Power equipment with detection and reaction systems
US15362388 Active US9878380B2 (en) 1999-10-01 2016-11-28 Table saw throat plates and table saws including the same

Country Status (1)

Country Link
US (15) US7210383B2 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020017181A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Retraction system for use in power equipment
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US20050139056A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Fences for table saws
US20060225551A1 (en) * 1999-10-01 2006-10-12 Gass Stephen F Safety system for power equipment
US7628101B1 (en) 2006-03-13 2009-12-08 Power Tool Institute Pyrotechnic drop mechanism for power tools
US20100023137A1 (en) * 2003-12-31 2010-01-28 Gass Stephen F Detection systems for power equipment
US20100059144A1 (en) * 2008-09-08 2010-03-11 Power Tool Institute Detection system for power tool
US7827893B2 (en) 2003-12-31 2010-11-09 Sd3, Llc Elevation mechanism for table saws
US7836804B2 (en) 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
US7866239B2 (en) 2003-12-31 2011-01-11 Sd3, Llc Elevation mechanism for table saws
US7888826B1 (en) 2005-05-19 2011-02-15 Power Tool Institute Capacitive sensing system for power cutting tool
US7895927B2 (en) 1999-10-01 2011-03-01 Sd3, Llc Power equipment with detection and reaction systems
US20110048188A1 (en) * 2009-08-26 2011-03-03 Credo Technology Corporation Table saw with actuator module
US8534174B2 (en) 2010-09-27 2013-09-17 Power Tool Institute Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator
US8919231B2 (en) 2008-11-19 2014-12-30 Power Tool Institute Safety mechanisms for power tools
US8950305B1 (en) * 2011-08-09 2015-02-10 Innovative Engineering Solutions, Inc. Saw brake

Families Citing this family (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6826988B2 (en) 2000-09-29 2004-12-07 Sd3, Llc Miter saw with improved safety system
US8061245B2 (en) 2000-09-29 2011-11-22 Sd3, Llc Safety methods for use in power equipment
US7377199B2 (en) 2000-09-29 2008-05-27 Sd3, Llc Contact detection system for power equipment
US20170190012A9 (en) * 1999-10-01 2017-07-06 Stephen F. Gass Power equipment with detection and reaction systems
US6813983B2 (en) 2000-09-29 2004-11-09 Sd3, Llc Power saw with improved safety system
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US6857345B2 (en) * 2000-08-14 2005-02-22 Sd3, Llc Brake positioning system
US20020017179A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Miter saw with improved safety system
US8065943B2 (en) 2000-09-18 2011-11-29 Sd3, Llc Translation stop for use in power equipment
US7024975B2 (en) * 2000-08-14 2006-04-11 Sd3, Llc Brake mechanism for power equipment
US7350444B2 (en) * 2000-08-14 2008-04-01 Sd3, Llc Table saw with improved safety system
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
US7231856B2 (en) * 2001-06-13 2007-06-19 Sd3, Llc Apparatus and method for detecting dangerous conditions in power equipment
US7171879B2 (en) * 2001-07-02 2007-02-06 Sd3, Llc Discrete proximity detection system
US7712403B2 (en) 2001-07-03 2010-05-11 Sd3, Llc Actuators for use in fast-acting safety systems
DE60238424D1 (en) * 2001-07-11 2011-01-05 Black & Decker Inc Security mechanisms for a powered tool
US20030056853A1 (en) 2001-09-21 2003-03-27 Gass Stephen F. Router with improved safety system
US7077039B2 (en) * 2001-11-13 2006-07-18 Sd3, Llc Detection system for power equipment
US6900728B2 (en) * 2002-07-29 2005-05-31 Home Depot U.S.A., Inc. System to detect user entry into a defined danger zone
US20040060404A1 (en) * 2002-09-30 2004-04-01 Emerson Electric Co. Breakaway hub for saw
CA2448479C (en) * 2002-11-12 2009-05-05 Makita Corporation Power tools
US20040123709A1 (en) * 2002-12-30 2004-07-01 Emerson Electric Co. System for sensing user contact with a saw blade
US20040194594A1 (en) * 2003-01-31 2004-10-07 Dils Jeffrey M. Machine safety protection system
US6922153B2 (en) 2003-05-13 2005-07-26 Credo Technology Corporation Safety detection and protection system for power tools
US7472634B2 (en) * 2003-08-20 2009-01-06 Sd3, Llc Woodworking machines with overmolded arbors
US20050041359A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Motion detecting system for use in a safety system for power equipment
JP2005088248A (en) * 2003-09-12 2005-04-07 Makita Corp Power tool
US8459157B2 (en) 2003-12-31 2013-06-11 Sd3, Llc Brake cartridges and mounting systems for brake cartridges
USRE44161E1 (en) 2005-07-11 2013-04-23 Fellowes, Inc. Shredder with thickness detector
US7661614B2 (en) * 2004-09-10 2010-02-16 Fellowes Inc. Shredder throat safety system
US7311276B2 (en) * 2004-09-10 2007-12-25 Fellowes Inc. Shredder with proximity sensing system
US7631822B2 (en) * 2004-09-10 2009-12-15 Fellowes Inc. Shredder with thickness detector
US7481140B2 (en) * 2005-04-15 2009-01-27 Sd3, Llc Detection systems for power equipment
US7421932B1 (en) 2005-05-19 2008-09-09 Power Tool Institute Power cutting tool comprising a radar sensing system
US20100037739A1 (en) * 2005-06-01 2010-02-18 Anderson Will H Power cutting tool with overhead sensing system
US20080245200A1 (en) * 2005-07-18 2008-10-09 Bladestop Pty Limited Electric Saw with Operator Protection System
GB2437594B (en) * 2006-04-24 2010-08-11 Acco Uk Ltd A shredding machine
US8008812B2 (en) 2006-07-14 2011-08-30 Aurora Office Equipment Co., Ltd. Paper shredder control system responsive to touch-sensitive element
CN2915259Y (en) 2006-07-14 2007-06-27 上海震旦办公设备有限公司 Paper shredder touch safety device
US20080053994A1 (en) * 2006-08-30 2008-03-06 Aurora Office Equipment Co., Ltd. Shanghai Paper-Breaker Wastebin Structure
US7757982B2 (en) * 2006-09-28 2010-07-20 Fellowes, Inc. Shredder with intelligent activation switch
US7905786B2 (en) * 2007-02-20 2011-03-15 Robert Bosch Gmbh Decoupling mechanism for power tools
GB2451513B (en) * 2007-08-02 2012-04-18 Acco Uk Ltd A shredding machine
DE102007044800A1 (en) * 2007-09-20 2009-04-02 Robert Bosch Gmbh machine tool
DE102008000038A1 (en) * 2008-01-11 2009-07-16 Robert Bosch Gmbh device
CN201239643Y (en) 2008-08-06 2009-05-20 上海震旦办公设备有限公司 Full automatic paper crusher without selecting paper
CN201244502Y (en) 2008-08-19 2009-05-27 上海震旦办公设备有限公司 Structure capable of removing nail of automatic paper crusher
US8122798B1 (en) 2008-11-19 2012-02-28 Power Tool Institute Power cutting tool with proximity sensing system
US20110005537A1 (en) * 2009-01-13 2011-01-13 Wei Hsu Nail Clipping Device with a Warning Module
CN101543799B (en) * 2009-04-28 2012-10-10 上海震旦办公设备有限公司 Novel protector for paper crusher
WO2010127018A1 (en) * 2009-04-28 2010-11-04 Georgia Tech Research Corporation Smart conductive tool-part registration system
CN101543800A (en) 2009-05-07 2009-09-30 上海震旦办公设备有限公司 Paper jamming prevention protective device of paper shredder
US8082825B2 (en) 2009-06-09 2011-12-27 Butler David J Health and safety system for a table saw
US8245612B2 (en) * 2009-08-26 2012-08-21 Robert Bosch Gmbh Table saw with swing arm support
US8286537B2 (en) * 2009-08-26 2012-10-16 Robert Bosch Gmbh Table saw with pressure operated actuator
US9079258B2 (en) * 2009-08-26 2015-07-14 Robert Bosch Gmbh Table saw with belt stop
US8250957B2 (en) * 2009-08-26 2012-08-28 Robert Bosch Gmbh Table saw with linkage drop system
US8291801B2 (en) * 2009-08-26 2012-10-23 Robert Bosch Gmbh Table saw with ratchet mechanism
US8316748B2 (en) * 2009-08-26 2012-11-27 Robert Bosch Gmbh Table saw with alignment plate
US20110048205A1 (en) * 2009-08-26 2011-03-03 Credo Technology Corporation Table saw with dust shield
US8210076B2 (en) 2009-08-26 2012-07-03 Robert Bosch Gmbh Table saw with mechanical fuse
US8186258B2 (en) 2009-08-26 2012-05-29 Robert Bosch Gmbh Table saw with actuator reset mechanism
US8297159B2 (en) * 2009-08-26 2012-10-30 Robert Bosch Gmbh Table saw with dropping blade
US20110048189A1 (en) * 2009-08-26 2011-03-03 Credo Technology Corporation Table saw with positive locking mechanism
US8327744B2 (en) * 2009-08-26 2012-12-11 Robert Bosch Gmbh Table saw with reset mechanism
DE102010034299A1 (en) 2010-08-13 2012-02-16 Bizerba Gmbh & Co. Kg cutting machine
US8723468B2 (en) 2011-04-28 2014-05-13 Aurora Office Equipment Co., Ltd. Cooled motor
US8708260B2 (en) 2011-08-08 2014-04-29 Aurora Office Equipment Co., Ltd. Depowered standby paper shredder and method
JP2013071194A (en) * 2011-09-27 2013-04-22 Hitachi Koki Co Ltd Cutting machine, and emergency stop method of motor
US9517516B2 (en) 2013-03-14 2016-12-13 Robert Bosch Tool Corporation Blade drop power tool with dust management
US9511429B2 (en) 2013-03-15 2016-12-06 Robert BoschTool Corporation Blade drop for power device and method of manufacturing thereof
US20140331833A1 (en) * 2013-05-13 2014-11-13 Stephen F. Gass Detection system for power equipment
JP6181450B2 (en) * 2013-07-24 2017-08-16 株式会社マキタ Reciprocating power tools
EP3079868A4 (en) * 2013-12-11 2017-07-05 Bosch Gmbh Robert Miter saw including a chain drive
US9914239B2 (en) 2015-03-12 2018-03-13 Robert Bosch Tool Corporation User interface system in a table saw
US9849527B2 (en) 2015-03-12 2017-12-26 Robert Bosch Tool Corporation Power tool with lightweight actuator housing
US9868166B2 (en) 2015-03-12 2018-01-16 Robert Bosch Tool Corporation Power tool with pyrotechnic lockout
US9687922B2 (en) 2015-03-12 2017-06-27 Robert Bosch Tool Corporation Power tool with cammed throat plate
US9868167B2 (en) 2015-03-12 2018-01-16 Robert Bosch Tool Corporation Power tool with drop arm orbit bracket
US9969015B2 (en) 2015-03-12 2018-05-15 Robert Bosch Tool Corporation Power tool with protected coupling plate
US20180036906A1 (en) 2016-08-05 2018-02-08 Robert Bosch Tool Corporation Blade Guard Having a Safety Feature

Citations (98)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170370B2 (en) *
US146886A (en) * 1874-01-27 Improvement in sawing-machines
US982312A (en) * 1910-02-04 1911-01-24 Edmond O Swafford Wood-sawing machine.
US1050649A (en) * 1910-05-28 1913-01-14 Crescent Machine Company Saw-guard.
US1054558A (en) * 1912-07-29 1913-02-25 Nye Company Self-adjusting support for circular-saw and shaper guards.
US1126970A (en) * 1913-02-10 1915-02-02 Eastman Kodak Co Saw-guard.
US1255886A (en) * 1915-11-23 1918-02-12 Emerald E Jones Saw-guard.
US1526128A (en) * 1923-10-20 1925-02-10 Flohr Andrew Saw guard
US1527587A (en) * 1923-12-07 1925-02-24 Hutchinson Frank Saw guard
US1616478A (en) * 1926-01-19 1927-02-08 Julius C Reiche Guard for circular saws
US1701948A (en) * 1925-04-02 1929-02-12 Crowe Mfg Corp Portable saw
US1896924A (en) * 1933-02-07 Table fob saws ob the like
US1988102A (en) * 1932-04-02 1935-01-15 William H Woodward Circular saw machine
US2106288A (en) * 1934-09-27 1938-01-25 Herbert E Tautz Circular saw apparatus
US2106321A (en) * 1937-02-16 1938-01-25 Guertin Gilles Saw guard
US2312118A (en) * 1940-07-31 1943-02-23 Ray H Neisewander Adjustable woodworking machine
US2392486A (en) * 1943-10-20 1946-01-08 Melvin J Larsen Machine tool
US2434174A (en) * 1944-06-19 1948-01-06 Joseph P Morgan Safety brake for band-saw blades
US2496613A (en) * 1944-05-30 1950-02-07 William H Woodward Guard for rotary disks
US2625966A (en) * 1951-06-01 1953-01-20 Callender Foundry & Mfg Compan Motor and belt drive for tilt arbor saws
US2626639A (en) * 1950-11-04 1953-01-27 Duro Metal Products Co Belt and pulley drive means for tiltable saws and the like
US2731049A (en) * 1954-06-10 1956-01-17 Orville C Akin Saw guard assembly for rotary table saws
US2736348A (en) * 1954-04-23 1956-02-28 Kropp Forge Company Band saw blade trap
US2873773A (en) * 1954-06-14 1959-02-17 King Seeley Corp Shiftable motor drive for tilting arbor saw
US3021881A (en) * 1956-12-31 1962-02-20 Yuba Cons Ind Inc Power saw
US3232326A (en) * 1962-10-04 1966-02-01 Rockwell Mfg Co Blade guard and splitter assembly for table saws
US3306149A (en) * 1964-02-12 1967-02-28 Dienes Werke Rotary cutter
US3368596A (en) * 1965-07-09 1968-02-13 John A. Comer Multi-purpose table saw
US3554067A (en) * 1969-02-26 1971-01-12 Joseph Scutella Fail-safe double-action safety guard
US3716113A (en) * 1969-11-01 1973-02-13 Aisin Seiki Warning device for indicating wear of friction pads in disk brake
US3785230A (en) * 1972-11-08 1974-01-15 Lokey Tool Inc Automatic safety brake for rotary blade equipment
US3793915A (en) * 1970-09-30 1974-02-26 Agfa Gevaert Ag Film cutting apparatus
US3861016A (en) * 1973-11-19 1975-01-21 Usm Corp Electric safety control mechanism
US3863208A (en) * 1973-02-14 1975-01-28 Eaton Corp Vehicle safety system control circuit having a malfunction indicator
US3931727A (en) * 1974-09-09 1976-01-13 Verson Allsteel Press Company Method and system for detecting brake wear in a metal forming machine
US3935777A (en) * 1974-06-13 1976-02-03 Alvin Lee Bassett Portable cutting device
US4007679A (en) * 1975-09-22 1977-02-15 Cincinnati Milacron, Inc. Press and safety latch therefor
US4070940A (en) * 1977-02-01 1978-01-31 Caterpillar Tractor Co. Machine tool with protective light curtain and work stock holding mechanism
US4075961A (en) * 1976-05-07 1978-02-28 Burlington Industries, Inc. Injury protection device for machinery
US4184394A (en) * 1977-04-01 1980-01-22 A/S Norcem Motor-driven saw having a circular saw blade
US4190000A (en) * 1962-10-23 1980-02-26 The United States Of America As Represented By The Secretary Of The Army Mine proximity fuse
US4249117A (en) * 1979-05-01 1981-02-03 Black And Decker, Inc. Anti-kickback power tool control
US4249442A (en) * 1979-07-25 1981-02-10 Black & Decker Inc. Elevation setting mechanism for a table saw and the like
US4251599A (en) * 1979-08-23 1981-02-17 Ramsey Corporation Ferrous metal body coated with an alloy formed by an iron/silicon extended molybdenum plasma spray powder
US4372427A (en) * 1979-09-21 1983-02-08 Valeo Industrial emergency brake
US4372202A (en) * 1980-11-20 1983-02-08 Ross Operating Valve Company Emergency brake for presses
US4374552A (en) * 1979-06-29 1983-02-22 Horton Manufacturing Co., Inc. Pivoted lever caliper brake
US4427042A (en) * 1981-05-13 1984-01-24 Emerson Electric Co. Power tool
US4492291A (en) * 1981-02-13 1985-01-08 Commissariat A L'energie Atomique Device for damping shocks caused by _moving heavy objects
US4566512A (en) * 1985-03-11 1986-01-28 Wilson Basil L R Router attachment
US4637289A (en) * 1984-11-02 1987-01-20 Whirlwind, Inc. Work presence controller
US4637188A (en) * 1986-02-28 1987-01-20 Owens-Corning Fiberglas Corporation Splicing means for faced insulation batts
US4644832A (en) * 1985-03-21 1987-02-24 Smith H Reid Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines
US4718229A (en) * 1985-10-30 1988-01-12 Rolls-Royce Plc Failsafe electronic control systems
US4721023A (en) * 1986-06-20 1988-01-26 Shopsmith, Inc. Saw guard system
US4722021A (en) * 1982-09-23 1988-01-26 Robert Bosch Gmbh Safety circuit for hand tools, and method for safe operation thereof
US4805505A (en) * 1988-03-02 1989-02-21 John Cantlin Multi-stop
US4805504A (en) * 1986-12-29 1989-02-21 Makita Electric Works, Ltd. Safety cover for miter saw
US4896607A (en) * 1987-10-01 1990-01-30 Hall James C Boosted kinetic energy penetrator fuze
US5081406A (en) * 1990-06-26 1992-01-14 Saf-T-Margin, Inc. Proximity responsive capacitance sensitive method, system, and associated electrical circuitry for use in controlling mechanical and electro-mechanical equipment
US5082316A (en) * 1989-12-01 1992-01-21 The Cookson Company Release mechanism and method with alarm circuit
US5083973A (en) * 1989-10-26 1992-01-28 Townsend Engineering Company Safety method and means for stopping meat skinning machines
US5086890A (en) * 1990-03-14 1992-02-11 Briggs & Stratton Corporation Engine braking system
US5184534A (en) * 1990-11-16 1993-02-09 Samsung Electronics Co., Ltd. Operation safety device for a portable power tool
US5276431A (en) * 1992-04-29 1994-01-04 Checkpoint Systems, Inc. Security tag for use with article having inherent capacitance
US5285708A (en) * 1992-05-18 1994-02-15 Porter-Cable Corporation Miter saw alignment system
US5377571A (en) * 1993-10-19 1995-01-03 Josephs; Harold Safety guard system for band saws and similar equipment
US5377544A (en) * 1991-12-19 1995-01-03 Motorola, Inc. Rotational vibration gyroscope
US5392568A (en) * 1993-12-22 1995-02-28 Black & Decker Inc. Random orbit sander having braking member
US5392678A (en) * 1992-08-27 1995-02-28 Makita Corporation Miter saw
US5480009A (en) * 1993-09-11 1996-01-02 Andreas Stihl Brake system with two independent mechanical brakes
US5592353A (en) * 1994-04-18 1997-01-07 Fujitsu Limited Power supply system
US5720213A (en) * 1994-12-12 1998-02-24 Black & Decker Inc. Bevel table saw adjustment
US5857507A (en) * 1996-09-20 1999-01-12 Black & Decker Inc. Table saw
US5861809A (en) * 1997-09-22 1999-01-19 Checkpoint Systems, Inc. Deactivateable resonant circuit
US6009782A (en) * 1997-06-19 2000-01-04 Makita Corporation Table saw
US6018284A (en) * 1998-07-29 2000-01-25 Schneider Electric Industries Sa Circuit breaker with high electrodynamic strength and breaking capacity
US6170370B1 (en) * 1998-08-19 2001-01-09 Sommerville Design & Manufacturing Inc. Circular saw splitter device with integral anti-kick back
US6336273B1 (en) * 1997-06-25 2002-01-08 Aktiebolaget Electrolux (Publ) Device to hold and guide an annular shaped saw blade
US20020017178A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Motion detecting system for use in a safety system for power equipment
US20020017336A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Apparatus and method for detecting dangerous conditions in power equipment
US20020017181A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Retraction system for use in power equipment
US20020017184A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Table saw with improved safety system
US20020017182A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake positioning system
US20020017180A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake mechanism for power equipment
US20020017175A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Translation stop for use in power equipment
US20020017179A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Miter saw with improved safety system
US20020017176A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Detection system for power equipment
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US20030002942A1 (en) * 2001-07-02 2003-01-02 Gass Stephen F. Discrete proximity detection system
US20030000359A1 (en) * 2001-06-27 2003-01-02 Eccardt Curtis J. Table saw blade heel adjuster
US20030005588A1 (en) * 2001-07-03 2003-01-09 Gass Stephen F. Actuators for use in fast-acting safety systems
US20030015253A1 (en) * 2001-07-18 2003-01-23 Gass Stephen F. Router with improved safety system
USD469354S1 (en) * 2001-12-14 2003-01-28 Black & Decker Inc. Shrink ring protector for circular saw blades
US20040011177A1 (en) * 2002-07-17 2004-01-22 Durq Machinery Corp. Quick-detachable blade guard mounting structure
US20060000337A1 (en) * 1999-10-01 2006-01-05 Gass Stephen F Band saw with safety system
US6986370B1 (en) * 2000-02-01 2006-01-17 Home Depot U.S.A., Inc. Table saw
US20080016998A1 (en) * 2003-04-29 2008-01-24 Keller David V System and Method for Rapidly Stopping a Spinning Table Saw Blade

Family Cites Families (646)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US302041A (en) 1884-07-15 Saw-guard
US1324136A (en) 1919-12-09 Tool-operating machine
US162814A (en) 1875-05-04 Improvement in saw-guards
US545504A (en) 1895-09-03 Saw-guard
US2675707A (en) 1954-04-20 brown
US307112A (en) 1884-10-28 Saw-guard
US15262A (en) 1856-07-01 wa ward
US509253A (en) 1893-11-21 Safety-guard for rip-saws
DE76186C (en)
US264412A (en) 1882-09-12 Half to john h
US1311508A (en) 1919-07-29 Planooraph co
US299480A (en) 1884-05-27 Saw-guard
USRE20687E (en) 1938-04-05 For cutting paper and other fibrous materials
US261090A (en) 1882-07-11 Circular-saw guard
US869513A (en) 1907-06-17 1907-10-29 Frederick C Pfeil Saw-guard.
US941726A (en) 1907-10-15 1909-11-30 Charles F Pfalzgraf Safety trip device for power-operated machines.
FR12487E (en) 1909-08-07 1910-09-23 Othon Troupenat Safety apparatus for circular saws
US1037843A (en) 1911-10-30 1912-09-10 David S Ackley Saw-guard
US1082870A (en) 1912-11-20 1913-12-30 John W Humason Saw-guard.
US1148169A (en) 1913-01-06 1915-07-27 Andrew F Howe Saw-guard.
US1074198A (en) 1913-03-21 1913-09-30 Francis Vosburgh Phillips Saw-guard.
US1101515A (en) 1913-06-27 1914-06-30 George H Adam Safety saw-guard.
US1205246A (en) 1913-10-27 1916-11-21 Int Harvester Canada Shipping-package.
US1132129A (en) 1914-06-15 1915-03-16 Fred M Stevens Safety-grip for circular saws.
US1154209A (en) 1914-08-11 1915-09-21 John L Rushton Saw-guard.
US1258961A (en) 1916-03-09 1918-03-12 James G Tattersall Saw-guard and splitter.
US1240430A (en) 1916-07-22 1917-09-18 Peter Erickson Cutter-guard.
US1228047A (en) 1916-12-18 1917-05-29 Darwin O Reinhold Self-adjusting spreader for saws.
US1244187A (en) 1917-02-17 1917-10-23 Warren M Frisbie Circular-saw guard.
US1397606A (en) 1918-07-29 1921-11-22 Christian N Smith Safety-shield for circular saws
US1450906A (en) 1919-07-28 1923-04-10 Charles W Anderson Power control for saw tables and the like
US1381612A (en) 1919-10-24 1921-06-14 George A Anderson Saw-guard
US1427005A (en) 1919-12-26 1922-08-22 James D Mcmichael Saw guard
US1465224A (en) 1921-07-22 1923-08-14 Lantz Joseph Edward Automatic shield for circular saws
US1430983A (en) 1921-10-05 1922-10-03 Granberg Wilhelm Guard for sawing machines
US1464924A (en) 1922-06-20 1923-08-14 William D Drummond Saw guard
US1584086A (en) 1922-12-11 1926-05-11 Lester T Fonda Sawing machine
US1492145A (en) 1922-12-29 1924-04-29 Randal E Talley Composite gear wheel
US1496212A (en) 1923-02-06 1924-06-03 James F Sullivan Circular-saw guard
US1552665A (en) 1923-07-13 1925-09-08 Authenrieth Herschel Chip box
US1511797A (en) 1924-02-15 1924-10-14 Frank E Berghold Saw guard
US1640517A (en) 1924-04-17 1927-08-30 Paine Lumber Company Ltd Saw guard
US1553996A (en) 1924-04-19 1925-09-15 Federer Joseph Safety saw guard
US1590988A (en) 1924-09-24 1926-06-29 Wheland Company Combined setwork and recede for sawmill carriages
US1551900A (en) 1924-12-05 1925-09-01 Robert L Morrow Safety device
US1582483A (en) 1925-01-13 1926-04-27 Geniah B Runyan Meat cutter
US1600604A (en) 1926-03-06 1926-09-21 Sorlien Andrew Board holder for sawing machines
US1662372A (en) 1926-04-26 1928-03-13 Abraham D Ward Saw guard
US1668061A (en) 1926-08-11 1928-05-01 Fred B Falkins Universal woodworking machine
US1712828A (en) 1927-02-14 1929-05-14 Henry J Klehm Saw guard
US1711490A (en) 1927-09-12 1929-05-07 William D Drummond Saw guard
US1774521A (en) 1928-10-31 1930-09-02 Wilbur S Neighbour Saw guard
US1816069A (en) 1928-11-02 1931-07-28 Ernest W Bennett Woodworking machine
US1811066A (en) 1929-02-23 1931-06-23 Carl E Tannewitz Sawing machine
US1807120A (en) 1929-03-11 1931-05-26 Hall & Brown Wood Working Mach Saw
US1879280A (en) 1930-08-30 1932-09-27 George V James Guard for circular saws
US1904005A (en) 1932-02-03 1933-04-18 Masset Edward Saw guard
US1902270A (en) 1932-06-02 1933-03-21 Delta Mfg Co Miter gauge
US1910651A (en) 1932-12-05 1933-05-23 Delta Mfg Co Trunnion table mounting
US1938548A (en) 1933-02-04 1933-12-05 Delts Mfg Company Machine table extension
US1963688A (en) 1933-02-15 1934-06-19 Delta Mfg Co Hollow fence bar and process of making the same
US1993219A (en) 1933-07-12 1935-03-05 Herberts Machinery Company Ltd Circular saw
US1938549A (en) 1933-07-22 1933-12-05 Delta Mfg Co Machine table
US2007887A (en) 1933-09-20 1935-07-09 Delta Mfg Co Saw guard
US2008673A (en) 1934-03-07 1935-07-23 Walker Turner Company Inc Power-driven tool
US2010851A (en) 1934-07-02 1935-08-13 William D Drummond Automatic hood guard
US2038810A (en) 1934-09-06 1936-04-28 Delta Mfg Co Circular-saw machine
US2044481A (en) 1934-12-08 1936-06-16 Western Electric Co Material working machine
US2054932A (en) 1935-04-03 1936-09-22 Fleming Isaac Dust collecting apparatus
US2020222A (en) 1935-04-08 1935-11-05 Delta Mfg Co Machine table insert
US2075282A (en) 1935-05-27 1937-03-30 Duro Metal Prod Co Bench saw
US2095330A (en) 1936-07-25 1937-10-12 Duro Metal Prod Co Bench saw
US2131492A (en) 1936-11-28 1938-09-27 Walker Turner Company Inc Tilting arbor table saw
US2168282A (en) 1936-12-18 1939-08-01 Delta Mfg Co Circular saw
US2163320A (en) 1937-05-01 1939-06-20 William P Morgan Sawing appliance
US2121069A (en) 1937-06-14 1938-06-21 Atlas Press Company Circular saw
US2241556A (en) 1938-06-20 1941-05-13 Hydraulic Dev Corp Inc Photoelectrically controlled press
US2236232A (en) 1938-09-03 1941-03-25 Western Electric Co Exhausting apparatus
US2265407A (en) 1939-01-25 1941-12-09 Delta Mfg Co Tilting arbor saw
US2261696A (en) 1939-03-15 1941-11-04 Walker Turner Co Inc Tilting saw
US2299262A (en) 1940-04-29 1942-10-20 Uremovich Mark Power-driven bench saw
US2292872A (en) 1940-07-10 1942-08-11 Elwyn A Eastman Double hinge tilting arbor saw
US2286589A (en) 1940-10-28 1942-06-16 Carl E Tannewitz Blade grabber for band saws
US2328244A (en) 1941-02-24 1943-08-31 William H Woodward Circular saw machine
US2313686A (en) 1941-03-17 1943-03-09 Uremovich Mark Saw guard
US2352235A (en) 1941-09-10 1944-06-27 Delta Mfg Co Saw guard
US2377265A (en) 1942-01-09 1945-05-29 Gen Motors Corp Sealed-in regulator
US2402232A (en) 1942-04-20 1946-06-18 Automatic Elect Lab Automatic telephone system
US2452589A (en) 1943-01-22 1948-11-02 Standard Telephones Cables Ltd Electric remote control and indication system
GB598204A (en) 1943-03-25 1948-02-12 Citroen Sa Andre Improvements in the protective control of the operations of machine tools
US2501134A (en) 1944-07-20 1950-03-21 Meckoski Universal machine tool
US2466325A (en) 1945-07-18 1949-04-05 Kearney & Trecker Corp Saw guard for adjustable-saw saw tables
US2425331A (en) 1945-12-13 1947-08-12 Linzie F Kramer Guard device for circular-saw table sawing machines
US2554124A (en) 1946-03-05 1951-05-22 Zita Wallace Salmont Means for automatic control of machinery or other devices
US2601878A (en) 1946-03-08 1952-07-01 St Paul Foundry & Mfg Co Table saw with part of the table swingably and laterally adjustable
US2530290A (en) 1946-12-12 1950-11-14 Atlas Press Company Table saw with tiltable and vertically adjustable arbor
US2562396A (en) 1947-03-15 1951-07-31 Walt Inc De Safety device for saws
US2590035A (en) 1947-09-10 1952-03-18 Pollak Abraham Tilting-arbor saw and cradle suspension therefor
US2509813A (en) 1947-09-29 1950-05-30 Stratos Corp Emergency disconnect means for auxiliaries
US2572326A (en) 1948-07-12 1951-10-23 Evans Mervyn Camille Circular saw guard
US2623555A (en) 1948-07-14 1952-12-30 Rockwell Mfg Co Saw guard
US2695638A (en) 1949-02-17 1954-11-30 King Seeley Corp Tilting arbor circular wood saw
US2593596A (en) 1949-03-24 1952-04-22 George V Olson Circular saw guard
US2517649A (en) 1949-04-09 1950-08-08 Frechtmann Jean Blade guard
US2518684A (en) 1949-04-21 1950-08-15 Hyman M Harris Duplex bench saw
US2737213A (en) 1950-02-02 1956-03-06 Syntron Co Belt-driven hand saw with increased belt friction
US2690084A (en) 1950-08-01 1954-09-28 Atlas Press Company Spring belt tension equalizer for machine tools
US2661780A (en) 1950-08-02 1953-12-08 Harry Crisci Automatic magnetic brake for band saws
US2711762A (en) 1951-12-08 1955-06-28 King Seeley Corp Arbor saw
US2719547A (en) * 1952-03-01 1955-10-04 Gjerde Arne Universally adjustable underbench saw
US2661777A (en) 1952-09-15 1953-12-08 Edgar J Hitchcock Self-adjusting motor mounting for vertically adjusted saws
US2678071A (en) 1953-02-06 1954-05-11 Duro Metal Products Co Motor mounting and drive means for power tools
US2704560A (en) 1953-02-12 1955-03-22 Gibraltar Mfg Co Inc Tilt arbor bench saw
US2722246A (en) 1953-05-22 1955-11-01 Arnoldy Leo Safety guards for power saws
US2913581A (en) 1953-09-25 1959-11-17 Bernard R Katshen Method and apparatus for controlling production machines
US2883486A (en) 1954-03-09 1959-04-21 Bell Telephone Labor Inc Piezoelectric switching device
US2758615A (en) 1954-03-11 1956-08-14 Hampden Brass And Aluminum Com Mounting for tilting arbor rotary miter saws
US2785710A (en) 1954-05-03 1957-03-19 Walt Inc De Automatic brake for power tools
US2839943A (en) 1954-05-28 1958-06-24 Westinghouse Electric Corp Molded article of manufacture and method of making the same
US2810408A (en) 1954-06-11 1957-10-22 Boice Crane Company Adjustable mounting and drive mechanism for table saws
US3085602A (en) 1954-06-14 1963-04-16 King Seeley Thermos Co Tilting arbor saw
US2711061A (en) 1954-07-29 1955-06-21 Gallagher Kaiser Corp Dust collector
US2844173A (en) 1954-09-13 1958-07-22 King Seely Corp Arbor saw with single handle control of tilt and elevation
US2804890A (en) 1955-09-26 1957-09-03 Elijah C Fink Adjustable power saw mounting
US2894546A (en) 1955-11-23 1959-07-14 Yates American Machine Co Combination saw, jointer, and sander tool
US2786496A (en) 1955-12-06 1957-03-26 Yates American Machine Co Safety guard for circular saw
US2852047A (en) 1956-04-16 1958-09-16 Duro Metal Products Co Tilting and elevating mechanism for a disc type table saw
US2876809A (en) 1956-06-29 1959-03-10 Rentsch Walter Low blade-tension band saw constructions
US2850054A (en) 1956-07-09 1958-09-02 Yates American Machine Co Tilting arbor saw
US2957166A (en) 1956-12-28 1960-10-18 Burroughs Corp Signal pulse converter
US2945516A (en) 1956-12-31 1960-07-19 Yuba Cons Ind Inc Tilting arbor table saw with coaxial control of elevation and tilt
US2937672A (en) 1957-10-17 1960-05-24 Gjerde Arne Adjustable motor-driven saw
US3005477A (en) 1957-12-23 1961-10-24 Horstmann & Sherwen Ltd Rotary tool wood working machines
US2954118A (en) 1958-06-23 1960-09-27 Doall Co Guard for protecting the cutting edges of saw blades
US2984268A (en) 1958-07-07 1961-05-16 George E Vuichard Manually-actuated saw brake
US3035995A (en) 1958-08-11 1962-05-22 North American Aviation Inc Electronic reactor safety control device
US3047116A (en) * 1958-08-27 1962-07-31 Rockwell Standard Co Safety device for power presses
US2978084A (en) * 1958-10-21 1961-04-04 Safeguard Mfg Company Safety interlock
US3013592A (en) 1959-03-23 1961-12-19 Theodore G Ambrosio Tilting table saw
US3007501A (en) 1959-06-11 1961-11-07 Handman Inc Combination woodworking machine
US2991593A (en) 1959-08-17 1961-07-11 Cohen Murray Abrading and cutting tool
US3011529A (en) 1959-09-08 1961-12-05 Rockwell Mfg Co Tilt and elevating mechanism for tilting arbor saws
US3011610A (en) * 1959-10-09 1961-12-05 Rockwell Standard Co Safety device for power presses
US3129731A (en) 1960-10-17 1964-04-21 Mc Culloch Corp Chain saw protector
US3105530A (en) 1961-10-23 1963-10-01 Russell E Peterson Guard for a circular table saw
US3356111A (en) 1961-10-31 1967-12-05 Rockwell Mfg Co Power tool improvements
US3163732A (en) 1961-11-20 1964-12-29 Gray & Huleguard Inc Electrically fused spring package
US3246205A (en) 1962-07-19 1966-04-12 Imrich M Miller Capacitor protective device
US3207273A (en) 1962-07-20 1965-09-21 Garcy Corp Closure release device
US3184001A (en) 1962-08-16 1965-05-18 Gen Motors Corp Brake drum and lining
US3313185A (en) 1962-10-29 1967-04-11 Drake Corp Automatic grinders
US3280861A (en) 1963-05-31 1966-10-25 Gjerde Arne Adjustable motor-driven underbench saw
US3186256A (en) 1963-07-22 1965-06-01 Reznick Louis Safety guards for brakes, punch presses and similar machines
US3274876A (en) 1963-10-15 1966-09-27 Linotype Gmbh Apparatus for symmetrically cutting a cast line
US3276497A (en) 1964-01-25 1966-10-04 Paul Kg Alfred Slicing machine having adjustable article support means
US3249134A (en) 1964-01-30 1966-05-03 Wilton Corp Saw and dado guard
US3337008A (en) 1964-05-02 1967-08-22 Daimler Benz Ag Disk brake construction
US3213731A (en) 1964-08-04 1965-10-26 John J Renard Paper log cutting apparatus
US3289713A (en) 1964-10-26 1966-12-06 Emerson Electric Co Machinery table insert
US3224474A (en) 1964-12-17 1965-12-21 Black & Decker Mfg Co Automatically-applied friction braking means for a portable electric tool
US3323814A (en) 1964-12-24 1967-06-06 Gray & Huleguard Inc Electromechanical actuator package
US3315715A (en) 1965-05-17 1967-04-25 Moak Machine And Foundry Compa Tilting arbor saw
US3444670A (en) 1965-06-21 1969-05-20 Ernest C Hungate Apparatus for treating gas
GB1132708A (en) 1965-10-15 1968-11-06 Wilmot Breeden Ltd Improvements in or relating to object detection systems
US3445835A (en) 1965-11-09 1969-05-20 R F Controls Inc Capacitive proximity sensor
US3439183A (en) 1966-03-16 1969-04-15 Intern Electric Fence Co Inc Solid state fence controller
US3386322A (en) 1966-03-21 1968-06-04 Stone Machinery Company Inc Cut-off machine
US3456696A (en) 1966-07-13 1969-07-22 Rockwell Mfg Co Portable circular saw
DE6607106U (en) 1966-11-15 1971-02-11 Eisele Maschf Chr Brake device for braking a driven rotating organs belastungsabhaengigen
US3454286A (en) * 1967-03-01 1969-07-08 Us Navy Thermally operated release mechanism
US3538964A (en) 1967-11-20 1970-11-10 Rockwell Mfg Co Motor driven table saw
US3547232A (en) * 1968-07-10 1970-12-15 Eaton Yale & Towne Explosive actuated brake
US3566934A (en) 1968-10-28 1971-03-02 Masonite Corp Saw guided splitter
DE1945392B2 (en) 1968-11-05 1978-08-24 Aktiengesellschaft Adolph Saurer, Arbon (Schweiz)
US3540338A (en) 1968-11-21 1970-11-17 James Mcewan Inc Cutoff machine
US3580376A (en) 1969-01-02 1971-05-25 Reliance Electric Co Escalator system having fault indicator
US3566996A (en) 1969-03-21 1971-03-02 Richard L Crossman Automatic brake adjuster
US3613748A (en) 1969-09-11 1971-10-19 Dolen A De Pue Safety guard arrangement for circular saw
US3593266A (en) 1969-10-16 1971-07-13 Gen Motors Corp Disc brake wear monitor system
US3621894A (en) 1969-10-30 1971-11-23 Us Plywood Champ Papers Inc Spiral band saw
US3581784A (en) * 1969-11-21 1971-06-01 Rockwell Mfg Co Saw table insert
US3670788A (en) 1970-05-22 1972-06-20 Henry M Pollak Arbor saw
US3695116A (en) * 1970-09-30 1972-10-03 Bunker Ramo Non-explosive electrically initiated heat-ignitable actuator
US3675444A (en) 1970-11-03 1972-07-11 Gen Electric High speed shaft disconnect utilizing a fusible element
US3648126A (en) 1970-12-28 1972-03-07 Standard Oil Co Ohio Electrical capacitor employing paste electrodes
US3680609A (en) 1970-12-28 1972-08-01 Troy Steel Corp Cutting apparatus
US3688815A (en) 1971-04-30 1972-09-05 Charles A Ridenour Radial arm saw depth gauge
US3745546A (en) 1971-06-07 1973-07-10 Allen Bradley Co Controller output circuit
US3889567A (en) 1971-07-06 1975-06-17 Amada Co Ltd Horizontal band saw machine
US3740000A (en) 1971-07-12 1973-06-19 Takata Kojyo Co Safety belt mechanism
US3719103A (en) 1971-10-07 1973-03-06 Design Systems Laminated gear construction
US3739475A (en) * 1971-10-19 1973-06-19 Mc Culloch Corp Chain saw safety method and apparatus
US3749933A (en) 1971-12-02 1973-07-31 W Davidson Underwater release device
US3754493A (en) 1971-12-10 1973-08-28 Rockwell Mfg Co Circular saw blade guard
US3829850A (en) * 1971-12-17 1974-08-13 Tyco Laboratories Inc Proximity detector
US3865493A (en) * 1972-02-09 1975-02-11 Bausch & Lomb Apparatus for direct electronic measurement of images
US3772590A (en) 1972-05-24 1973-11-13 Mc Graw Edison Co Method of production testing fuses and circuit for accomplishing such testing
US3967161A (en) * 1972-06-14 1976-06-29 Lichtblau G J A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination
US3805658A (en) 1972-07-24 1974-04-23 Whitney Corp W Punch press with safety door
US3793727A (en) * 1972-10-04 1974-02-26 Mcculloch Corp Chain saw safety method and apparatus
US3805639A (en) 1972-11-21 1974-04-23 Best & Donovan Safety guard for a breaking saw
US3886413A (en) 1973-01-29 1975-05-27 Xenex Corp Presence sensing and self-checking control system
US3808932A (en) 1973-02-23 1974-05-07 Stanley Fixture Mfg Co Inc Saw guard
US3880032A (en) 1973-08-22 1975-04-29 Dwight C Green Feeler operated saw guard
US3882744A (en) 1973-08-24 1975-05-13 Xerox Corp Electrostatographic web feeding apparatus
US3858095A (en) * 1973-08-28 1974-12-31 Riedl Ohg Adolf Protective circuit arrangement for band cutter machines
US3970178A (en) 1973-09-04 1976-07-20 Outboard Marine Corporation Chain saw clutch with engaging and releasing centrifugal weights
US3829970A (en) 1973-09-20 1974-08-20 Milwaukee Electric Tool Corp Compression spring tensioner for the blade of portable electric band saw
US3874747A (en) 1973-10-03 1975-04-01 Walter Case Fluid actuated brake locking mechanism
JPS5078998A (en) 1973-11-15 1975-06-27
US3946631A (en) 1974-03-04 1976-03-30 Malm John A Undercut saw
US3924688A (en) 1974-04-05 1975-12-09 G & H Technology Fire fighting system
DE2422940B2 (en) 1974-05-11 1976-06-10 Means for controlling the feed motion of a rotating, carried by a tool spindle tool, in particular a grinding wheel
US3960310A (en) 1974-05-20 1976-06-01 Lucian Nussbaum Apparatus for brazing hardened tips to surfaces
US4029159A (en) 1974-06-05 1977-06-14 Svend Nymann Brake control for rotary electric tools
DE7420476U (en) 1974-06-14 1974-09-12 Eisele Ch Maschinenfabrik
US4090345A (en) 1976-03-17 1978-05-23 Briggs & Stratton Corporation Brake safety system for a power driven rotary mower
US3953770A (en) * 1974-07-11 1976-04-27 Jinnosuke Hayashi Safety equipment for machinery used in processing plates, etc.
US3905263A (en) 1974-08-09 1975-09-16 Roger W Smith Table mounting for portable power saw
US3947734A (en) * 1974-09-06 1976-03-30 The Stanley Works Electronic personnel safety sensor
US3942607A (en) 1974-09-06 1976-03-09 Dane Sobat Elevator safety brake
US3945286A (en) 1974-11-08 1976-03-23 Smith Roger W Portable radial arm saw
ES208471Y (en) 1974-12-18 1976-08-01 Vidaller Fierro protective device for circular saws.
DE2460057B2 (en) 1974-12-19 1977-02-10 Switching arrangement with a stray field capacitor
US3974565A (en) 1975-02-07 1976-08-17 Simplex Cutting Machine Company, Inc. Adjustable cutting machine
US3949636A (en) 1975-02-21 1976-04-13 Armstrong Cork Company Saw guard
JPS5541931B2 (en) * 1975-04-19 1980-10-27
US3975600A (en) 1975-06-06 1976-08-17 Marston Harvey J Telephone line splicing apparatus
US4091698A (en) 1975-09-08 1978-05-30 Western Gear Corporation Rotary cutting blade control system
US4060160A (en) * 1975-11-17 1977-11-29 Raymond Stanley Lieber Safety guard for power operated machine
US4085303A (en) * 1976-03-08 1978-04-18 Ametek, Inc. Safety double protection device for machines having plural circuit breaker assemblies associated with doffer roller and hand guard
US4175452A (en) 1976-03-30 1979-11-27 Mukachevsky Stankostroitelny Zavod Imeni S.M. Kirova Machine for the mechanical working of band saws
US4047156A (en) * 1976-04-12 1977-09-06 Wagner Electric Corporation Reactively decoupled dual channel keying circuit for wide-band frequency modulated keyable control circuit
JPS52157588U (en) * 1976-05-25 1977-11-30
US4033218A (en) * 1976-06-04 1977-07-05 Spanjer Brothers, Inc. Table-saw guard
US4026177A (en) * 1976-07-21 1977-05-31 Lokey Tool, Inc. Rotary insulated saw blade
US4077161A (en) 1976-07-23 1978-03-07 Wyle Laboratories Cut-off machine
JPS5853249Y2 (en) 1976-07-28 1983-12-03
US4119864A (en) * 1976-08-23 1978-10-10 Rca Corporation Touch switch circuits
DE2641465C3 (en) 1976-09-15 1980-11-27 Gustav Wagner Maschinenfabrik, 7410 Reutlingen
US4048886A (en) 1976-09-16 1977-09-20 Xenex Corporation Brake monitor with self-checking
US4063478A (en) 1976-10-20 1977-12-20 Diebold Incorporated Saw enclosure construction
JPS592653B2 (en) * 1977-01-25 1984-01-19 Toyota Motor Co Ltd
US4152833A (en) * 1977-06-22 1979-05-08 Crow, Lytle, Gilwee, Donoghue, Adler And Weineger Chain saw braking mechanism
US4161649A (en) 1977-12-21 1979-07-17 American Motors Corporation Multimode electronic brake monitor system
DE2800403A1 (en) 1978-01-05 1979-07-19 Bosch Gmbh Robert Operator protection on press or drilling machine tool - has probe which, on operator contact, causes tool feed to reverse
US4199930A (en) 1978-01-19 1980-04-29 The Gillette Company Alarm switch for an alarm circuit in a horological device
US4145940A (en) 1978-01-26 1979-03-27 Woloveke Eugene L Brake apparatus for a motor driven saw blade
US4195722A (en) * 1978-04-19 1980-04-01 Outboard Marine Corporation Circuit for a power operated machine
US4206910A (en) 1978-06-28 1980-06-10 Biesemeyer William M Table saw fence system
US4302879A (en) 1978-09-18 1981-12-01 Beaird-Poulan Division Emerson Electric Co. Safety braking apparatus for portable chain saw
US4206666A (en) 1978-11-16 1980-06-10 James Joseph Morrison Management Ltd. Press control system
US4288048A (en) * 1979-03-06 1981-09-08 U.S. Philips Corporation Cassette
US4305442A (en) 1979-03-29 1981-12-15 Bruce Currie Saw including resiliently mounted flexible guard means
US4276799A (en) * 1979-04-18 1981-07-07 Black & Decker Inc. Power tool apparatus
US4267914A (en) * 1979-04-26 1981-05-19 Black & Decker Inc. Anti-kickback power tool control
DE2917497A1 (en) 1979-04-30 1980-11-13 Eduard Righi Brake for circular saw blade - is mounted on saw guide wedge to protect it from sawdust
US4241505A (en) 1979-05-21 1980-12-30 Johns-Manville Corporation Dust shroud for portable circular saw
DE2922573C2 (en) 1979-06-02 1989-06-15 Fa. Andreas Stihl, 7050 Waiblingen, De
US4334450A (en) 1979-06-20 1982-06-15 Giben Impianti S.P.A. Sawing machines
US4466170A (en) 1979-08-06 1984-08-21 Davis Harry C Adjustable circular insulation saw system
US4291794A (en) 1979-10-10 1981-09-29 The B. F. Goodrich Company Power transmission and energy absorbing systems
US4262278A (en) 1979-10-10 1981-04-14 The Bendix Corporation Diagnostic brake system warning circuit
FR2469616B1 (en) 1979-11-14 1982-08-20 Ferodo Sa
US4560033A (en) 1980-01-21 1985-12-24 Julian C. Renfro Multifunction wheelchair handbrake especially adapted for ramp climbing
US4255995A (en) 1980-01-24 1981-03-17 Connor J Franklin Dust confining and collection housing for power table saws and the like
US4270427A (en) * 1980-02-04 1981-06-02 Black & Decker Inc. Bevel angle setting means for a power tool apparatus
US4321841A (en) * 1980-04-10 1982-03-30 Steelcase Inc. Press safety device
US4319146A (en) 1980-05-23 1982-03-09 The Will-Burt Company Power driven equipment safety device
US4276459A (en) 1980-06-16 1981-06-30 Ingersoll-Rand Company Paddle switch safety button
US4326864A (en) 1980-08-08 1982-04-27 Sittler Werner G Apparatus for and method of collecting sawdust particles
US4391358A (en) * 1980-11-05 1983-07-05 Haeger Virgil J Hardware press and punch apparatus
US4367665A (en) 1980-12-19 1983-01-11 Emerson Electric Co. Sawdust collection system
DE3111684A1 (en) 1981-03-25 1982-10-14 Ver Glaswerke Gmbh "Electronic control circuit for the drive motor of a submersible car window"
GB2096844A (en) 1981-04-10 1982-10-20 Beswick Kenneth E Ltd Electrical fuse
US4385539A (en) 1981-08-14 1983-05-31 Black & Decker Inc. Articulated dust cover means for table saw or other power-driven apparatus
DE3219901A1 (en) * 1981-10-07 1983-04-21 Rolf Susemihl The safety drive for an electric motor-powered arbeitsgeraet with gefahrbringendem, moving tool
US4576072A (en) 1981-10-16 1986-03-18 Emerson Electric Co. Sawdust collection apparatus for a table saw
US4418597A (en) 1982-01-18 1983-12-06 Emerson Electric Co. Anti-kickback device
US4503739A (en) 1982-01-22 1985-03-12 Konieczka Edmund T Table saw with multiple blade turret
US4470046A (en) * 1982-02-02 1984-09-04 E. I. Du Pont De Nemours And Company Capacitively coupled machine tool safety system having a digital quantizer
US4532501A (en) * 1982-02-02 1985-07-30 E. I. Du Pont De Nemours And Company Capacitively coupled machine tool safety system
EP0088390B1 (en) 1982-03-06 1986-07-16 Gaus, Harry Protection device for electrical appliances
DE3209162C2 (en) 1982-03-13 1993-04-08 Fa. Andreas Stihl, 7050 Waiblingen, De
JPS6156046B2 (en) 1982-03-30 1986-12-01 Amada Co Ltd
US4512224A (en) 1982-04-01 1985-04-23 Kabushiki Kaisha Kindai Slitter device
US4510489A (en) * 1982-04-29 1985-04-09 Allied Corporation Surveillance system having magnetomechanical marker
US4518043A (en) 1982-08-09 1985-05-21 Jack F. Anderson Tool apparatus with control to move tool when object approached
JPH0418394B2 (en) * 1982-09-02 1992-03-27 Fuji Photo Film Co Ltd
US4466233A (en) 1982-09-30 1984-08-21 Thesman Industries, Inc. Mower drive assembly
US4559858A (en) 1982-12-20 1985-12-24 Laskowski Enterprises, Incorporated Portable band saw saw mill apparatus
US4573556A (en) * 1983-05-20 1986-03-04 Aktiebolaget Electrolux Actuator for the release of an automatic emergency brake of a hand-operated powered tool
DE3322907C2 (en) 1983-06-25 1991-10-24 Skf Gmbh, 8720 Schweinfurt, De
DK149179C (en) 1983-06-27 1986-08-25 Herluf Kallesoee Circular with detachable drive clutch
US4576073A (en) 1983-07-01 1986-03-18 Stinson Robert J Saw blade guard
FR2551928B1 (en) 1983-09-14 1986-05-23 Sames Sa Device for protection of low voltage equipment circuits electrostatic projection and projection equipment incorporating the device
US4532844A (en) * 1983-09-16 1985-08-06 Chang Jen W Device for supporting a circular saw of sawing machine
EP0139581B1 (en) 1983-10-20 1988-07-20 Cehess Technologies Fuse devices particularly suitable for being mounted on printed-circuit cards
US4572556A (en) * 1983-10-24 1986-02-25 Best Lock Corporation Mortise lock
US4675664A (en) 1983-10-26 1987-06-23 Hydro-Quebec Alarm system and method for detecting proximity of an object to electrical power lines
FR2556074B1 (en) 1983-12-06 1987-03-06 Ereis Exploit Method and protection device, using a laser beam, a working machine of a tole
FR2556643A1 (en) 1983-12-20 1985-06-21 Stempniakowski Tonny Safety electronic contact detector
FR2570017A2 (en) 1983-12-20 1986-03-14 Tony Stempniakowski Electronic safety contact detector
DE3409957C2 (en) 1984-03-17 1989-02-09 Felten & Guilleaume Energietechnik Ag, 5000 Koeln, De
JPH0219214Y2 (en) 1984-03-21 1990-05-28
EP0158593B1 (en) 1984-04-09 1989-05-24 GET Gesellschaft für Elektronik-Technologie mbH Electronic surveillance and warning device for a manipulator
DE3519802A1 (en) 1984-06-19 1985-12-19 Electrolux Ab Control device for a power saw
US4621300A (en) * 1984-07-05 1986-11-04 Summerer Ray E Safety monitoring system for punch press operators
DE3427733A1 (en) 1984-07-27 1986-01-30 Reich Maschf Gmbh Karl Circular saw with a run-down brake
DE3430840A1 (en) 1984-08-22 1986-03-06 Stihl Maschf Andreas Motorkettensaege
US4599927A (en) * 1985-05-08 1986-07-15 Emerson Electric Co. Tool elevation and bevel adjustment for direct drive power tool
DK215385D0 (en) * 1985-05-15 1985-05-15 Northern Food Line Machines K Safety system for use in conjunction with workstations
US4757881A (en) * 1985-05-31 1988-07-19 Aktiebolaget Electrolux Motor saw brake
US4625604A (en) 1985-06-10 1986-12-02 Hirsh Company Splitter and blade guard assembly
US4606251A (en) 1985-07-31 1986-08-19 Cae Machinery Ltd. Adjustable sawdust shear for bandmills
US4657428A (en) 1985-09-10 1987-04-14 Wiley Edward R Quick change mechanism for circular saw blades and other spinning disc devices
US4615247A (en) 1985-09-13 1986-10-07 Shopsmith, Inc. Anti-kickback system
CN86107973B (en) * 1985-12-03 1988-08-03 三菱电机株式会社 Control device for sewing machine
US4756220A (en) 1985-12-18 1988-07-12 Engineering Consulting Services Safety mechanism for saws
US4679719A (en) 1985-12-27 1987-07-14 Senco Products, Inc. Electronic control for a pneumatic fastener driving tool
US4694721A (en) 1986-04-08 1987-09-22 Delta International Machinery Corp. Motor pack for circular saw
US4751603A (en) * 1986-07-07 1988-06-14 Simatelex Manufactory Company Limited Safety devices
US4888869A (en) 1986-04-17 1989-12-26 Leatherman Tool Group, Inc. Lock-bar foldable tool
US4742743A (en) 1986-04-24 1988-05-10 Scarpone William J Radial saw accessory for preventing sawdust buildup
US5201110A (en) 1986-08-22 1993-04-13 Bane Marvin L Pallet dismantler
US4831279A (en) 1986-09-29 1989-05-16 Nartron Corporation Capacity responsive control circuit
DK552186D0 (en) 1986-11-19 1986-11-19 Smidth & Co As F L Method and apparatus for detecting tilbagestraaling in an electrostatic precipitator by regular or intermittent jaevnspaendingsforsyning
FR2608781B1 (en) 1986-12-17 1989-03-03 Thomas Jean Detector proximity between a metal and a mass element in electrical voltage
JPH0634897Y2 (en) 1987-01-12 1994-09-14 リョービ株式会社 Roagado apparatus of the table saw
US4792965A (en) * 1987-01-29 1988-12-20 Morgan Harvey L Oscillator system for detecting a selected one of a plurality of tuned circuits
US4875398A (en) 1988-01-15 1989-10-24 Atlantic Richfield Company Retractable dust control hood and guard for rotary table saw
US4864455A (en) 1988-02-16 1989-09-05 Mitsubishi Denki Kabushiki Kaisha Arrester disconnecting device
EP0358740A1 (en) 1988-03-09 1990-03-21 Werner Lüber Process and arrangement for removing sprues from castings
US4819501A (en) * 1988-04-12 1989-04-11 Handy & Harman Automotive Group, Inc. Self-adjusting brake mechanism
US4934233B1 (en) 1988-06-29 1994-08-23 Emerson Electric Co Compound miter saw
US5119555A (en) 1988-09-19 1992-06-09 Tini Alloy Company Non-explosive separation device
EP0362937B1 (en) 1988-10-04 1995-04-12 Giorgio Grasselli Safety control system for power operated equipment
US4965909A (en) * 1988-10-04 1990-10-30 Mccullough Timothy J Safety control for power operated equipment
US4962685A (en) 1988-10-27 1990-10-16 Hagstrom Oscar E Production table saw
US5230269A (en) 1988-12-30 1993-07-27 Ryobi Limited Table saw
US5293802A (en) 1989-08-11 1994-03-15 Ryobi Limited Table saw
US4906962A (en) * 1989-01-05 1990-03-06 Babcock, Inc. Fuse wire switch
US4907679A (en) 1989-01-10 1990-03-13 Wilhelm Menke Catch device for a roll-up door, grate, grill or the like
FR2646485B1 (en) * 1989-04-28 1991-08-23 Sime Ind Brake is self-adjusting opening and wear compensator
US4969063A (en) 1989-05-16 1990-11-06 Square D Company Circuit breaker with status indicating lights
DE69010568T2 (en) 1989-05-19 1994-11-24 Murata Manufacturing Co Ceramic resonance type electrostatic sensor device.
US4937554A (en) 1989-05-22 1990-06-26 Paccar Inc. Electronic brake monitoring system and method
US5052255A (en) * 1989-06-12 1991-10-01 Gaines Robert C Speed brake
DE3921778A1 (en) 1989-07-01 1991-01-10 Hilti Ag Handtools with separable or grinding wheel
JP2573057B2 (en) 1989-07-07 1997-01-16 株式会社マキタ Tabletop circular saw
US5067366A (en) * 1989-07-28 1991-11-26 Fiat Auto S.P.A. Servo-assisted device for operating a vehicle parking brake
US5149176A (en) 1989-08-07 1992-09-22 Tekonsha Engineering Company Controller for electric braking systems
US5116249A (en) 1989-08-11 1992-05-26 Ryobi Limited Table saw
US5606534A (en) 1989-09-01 1997-02-25 Quantronix, Inc. Laser-based dimensioning system
US4975798A (en) 1989-09-05 1990-12-04 Motorola Inc. Voltage-clamped integrated circuit
DE3930980A1 (en) * 1989-09-16 1991-03-28 Autoflug Gmbh Ausloesevorrichtung for a mechanical energy storage
US5201684A (en) * 1989-10-10 1993-04-13 Townsend Engineering Company Safety means for powered machinery
US5148053A (en) * 1989-10-10 1992-09-15 Townsend Engineering Company Safety device for powered machinery
US5025175A (en) * 1989-10-10 1991-06-18 Townsend Engineering Company Safety means for powered machinery
US5046426A (en) * 1989-10-31 1991-09-10 The Boeing Company Sequential structural separation system
US4964450A (en) 1989-12-15 1990-10-23 Hughes James D Extension for table saw
US5156508A (en) 1989-12-27 1992-10-20 Grisley Kenneth M Cam action clamp
DE4007030A1 (en) 1990-03-02 1991-09-05 Black & Decker Inc Power-driven hand tool machine with a rotationally driven tool
US5198702A (en) * 1990-03-07 1993-03-30 Mccullough Timothy J Control and safety system for electrically operated devices
US5212621A (en) * 1990-04-26 1993-05-18 Cnc Retrofits, Inc. Proximity switched machine control method and apparatus
US5239879A (en) 1990-05-24 1993-08-31 Economou Demitri G Simple stepless variables transmission
US5331875A (en) * 1990-06-28 1994-07-26 Ryobi America Corporation Anti-kick forward device for power driven saws
US5257570A (en) 1990-07-16 1993-11-02 Ryobi Limited Circular saw unit
US5074047A (en) 1990-09-10 1991-12-24 Tuscarora Designs, Inc. Anti-pinch device for chain saw
US5122091A (en) * 1990-09-20 1992-06-16 Townsend Engineering Company Safety mechanism for meat skinning machines
DE4107110C2 (en) 1991-03-06 1999-06-02 Stihl Maschf Andreas Motor chain saw with a lubricating oil pump
US5123317A (en) 1991-03-20 1992-06-23 Ryobi Motor Products Corp. Support structure for a table saw blade assembly
US5181447A (en) 1991-03-25 1993-01-26 Timothy Hewitt Adjustable protecting guard apparatus for a blade of a table saw
US5341133A (en) 1991-05-09 1994-08-23 The Rowland Institute For Science, Inc. Keyboard having touch sensor keys for conveying information electronically
US5125160A (en) 1991-05-15 1992-06-30 Textron Inc. Power tool inertia brake
US5320382A (en) 1991-05-31 1994-06-14 Gt-Devices Pulsed pressure source particularly adapted for vehicle occupant air bag restraint systems
US5206625A (en) 1991-06-27 1993-04-27 Davis William E Brake wear indicator
US5537748A (en) 1991-07-09 1996-07-23 Ryobi Limited Cover structure for electric circular saw
US5174349A (en) 1991-08-09 1992-12-29 Skil Corporation Power table saw assemblies having integral spare part storage
US5158001A (en) 1991-08-09 1992-10-27 Skil Corporation Power table tool assemblies with dust collection system
US5218189A (en) * 1991-09-09 1993-06-08 Checkpoint Systems, Inc. Binary encoded multiple frequency rf indentification tag
US5159864A (en) * 1991-09-23 1992-11-03 Wedemeyer Arlan B Insert for a table saw
US5205069A (en) * 1991-10-02 1993-04-27 The United States Of America As Represented By The United States Department Of Energy High speed door assembly
US6427570B1 (en) 1991-10-09 2002-08-06 Black & Decker Inc. Dust collection system for compound miter saw
US5819619A (en) 1991-10-09 1998-10-13 Black & Decker Inc. Dust collection system for compound miter saw
US5199343A (en) 1991-10-09 1993-04-06 Black & Decker Inc. Power saw with louvered blade guard
DE4235161A1 (en) 1991-11-25 1993-05-27 Intecma Konstruktions Und Hand A device for securing a limited workspace
US5265510A (en) 1992-01-13 1993-11-30 Hoyer Ellefsen Sigurd Material working and tool control system
KR940005058B1 (en) 1992-02-14 1994-06-10 강진구 Out-put circuit and method of microwave oven
DE4205965C1 (en) 1992-02-27 1993-07-08 Fried Kunststofftechnik Gmbh, 7068 Urbach, De Protective hood for circular saw or combined circular cross-cut saw - has guide walls forming flow channels, which extend over top end of splitting wedge above table
US5201863A (en) 1992-03-02 1993-04-13 Ryobi Motor Products Corporation Miter table assembly for a table saw
US5207253A (en) 1992-03-20 1993-05-04 Ryobi Motor Products, Corp Plunge router
US5272946A (en) * 1992-03-20 1993-12-28 Food Industry Equipment International, Inc. Safety control system for power operated equipment
US5245879A (en) 1992-05-07 1993-09-21 Mckeon Rolling Steel Door Co., Inc. Fail-safe fire door release mechanism having automatic reset
US5231906A (en) 1992-09-30 1993-08-03 Julien Kogej Table saw guard
US5239978A (en) 1992-09-30 1993-08-31 The United States Of America As Represented By The Secretary Of The Navy Oscillatory abrasive cable power saw
US5353670A (en) 1993-03-15 1994-10-11 Emerson Electric Co. Independently and jointly operable radial saw guards
US5587618A (en) 1993-04-15 1996-12-24 Hathaway; George D. Direct current homopolar machine
CA2095398C (en) 1993-05-03 2001-06-12 Kalyan Ghosh System for detecting human presence in hazardous situations
JPH06328359A (en) 1993-05-21 1994-11-29 Hitachi Koki Co Ltd Grinding wheel shaft of portable grinder
US5411221A (en) 1993-05-24 1995-05-02 Allied-Signal Inc. Seat belt retractor with tension relief mechanism
US5321230A (en) 1993-06-02 1994-06-14 Shanklin Corporation Seal wire heat control system
US5401928A (en) 1993-06-07 1995-03-28 Kelley; William J. Safety control for power tool
GB9314163D0 (en) 1993-07-08 1993-08-18 Black & Decker Inc Chop/table saw arrangement
GB9314165D0 (en) 1993-07-08 1993-08-18 Black & Decker Inc Chop/table saw with parallelogram arrangement
DE69406070T2 (en) * 1993-07-29 1998-02-05 Giorgio Grasselli Safety device for a to-handle by an operator device with electric motor
DE4326313A1 (en) 1993-08-05 1995-02-09 Rolf Neusel Method and arrangement for the electrical release of mechanically stored power for unlocking
US5453903A (en) 1993-08-18 1995-09-26 Abb Power T&D Company, Inc. Sub-cycle digital distance relay
ES2129480T3 (en) 1993-10-18 1999-06-16 Inventio Ag Braking safety device for elevator cars.
US5423232A (en) 1993-10-22 1995-06-13 Imo Industries Inc., Boston Gear Division Self-lubricating gear system
US5398740A (en) 1993-11-12 1995-03-21 Miller; Manford B. Power tool table with adjustable tool mounting plate insert and related method
US5531147A (en) 1993-11-23 1996-07-02 Alpine Engineered Products, Inc. Saw guard
FR2713372B1 (en) 1993-12-01 1996-03-01 Neopost Ind Thermally protective arrangement for secure electronic appliance, in particular franking machine.
US5447085A (en) 1994-03-10 1995-09-05 Gochnauer; Marshall Table saw accessories for improved operability
CA2140991A1 (en) 1994-03-22 1995-09-23 Eberhard Kirbach Apparatus for predicting the cutting performance of saws
US5791224A (en) 1994-03-24 1998-08-11 Ryobi Limited Circular sawing machine
US5647258A (en) 1994-03-30 1997-07-15 Ryobi Outdoor Products Fence adjustment mechanism
US5471888A (en) 1994-04-12 1995-12-05 G & H Technology, Inc. Motion initiator
US6418829B1 (en) 1994-05-06 2002-07-16 Thomas Stanley Pilchowski Power tool safety device
DE4424615B4 (en) 1994-07-13 2008-03-20 Elumatec Gmbh & Co. Kg Under-table miter saw
US5602734A (en) 1994-09-23 1997-02-11 Advanced Safety Concepts, Inc. Automobile air bag systems
US5852951A (en) 1994-10-04 1998-12-29 Briggs & Stratton Corporation Composite gear and method of making same
US5510587A (en) 1994-10-19 1996-04-23 Reitech Corporation Electric circuit actuating mechanism
US5572916A (en) 1994-10-20 1996-11-12 Hitachi Koki Haramachi Co., Ltd. Desk-top cutting machine
CA2179524A1 (en) 1994-10-21 1996-05-02 Charles J. Moorman Pneumatic fastener driving tool and an electronic control system therefor
US5534836A (en) * 1994-11-28 1996-07-09 Sensormatic Electronics Corporation Deactivator for theft-deterrent markers
GB9425390D0 (en) 1994-12-12 1995-02-15 Black & Decker Inc A double bevel table saw
US5623860A (en) 1994-12-15 1997-04-29 Emerson Electric Co. Adjustable/bypassable bevel stop for compound miter saw
US5503059A (en) 1995-01-03 1996-04-02 Pacholok; David R. Vehicle disabling device and method
US6479958B1 (en) 1995-01-06 2002-11-12 Black & Decker Inc. Anti-kickback and breakthrough torque control for power tool
US5588213A (en) 1995-03-07 1996-12-31 Swanberg; Alan M. Circular saw with dust trapper
DK0824388T3 (en) 1995-05-12 2000-05-08 Reich Spezialmaschinen Gmbh Vertical panel-saw
JP3214295B2 (en) 1995-05-12 2001-10-02 日立工機株式会社 This portable dust collector round
US5667152A (en) * 1995-05-30 1997-09-16 Mooring; Jonathan E. Safety system for a wood chipper
DE19523021A1 (en) 1995-06-24 1997-01-02 Teves Gmbh Alfred Vacuum brake booster for motor vehicles
US5619896A (en) 1995-06-27 1997-04-15 Chen; Ruey Z. Base of a sawing machine
US5755148A (en) 1995-07-07 1998-05-26 Black & Decker Inc. Adjustable fence for a compound miter saw
DE19525197A1 (en) * 1995-07-11 1997-01-16 Hoechst Ag Granular detergent builder
US5791223A (en) 1995-07-13 1998-08-11 Midwest Rail Inc. Angled power saw for railroad rails
US5937720A (en) 1995-08-10 1999-08-17 Milwaukee Electric Tool Corporation Lower blade guard actuating mechanism for a slide compound miter saw
JP3263284B2 (en) 1995-09-04 2002-03-04 株式会社マキタ Electric chain saw
US5771742A (en) * 1995-09-11 1998-06-30 Tini Alloy Company Release device for retaining pin
US5606889A (en) * 1995-09-19 1997-03-04 G & H Technology, Inc. Reusable initiator for use in triggering high-load actuators
EP0850385B1 (en) * 1995-09-25 2002-10-02 Jorn Sorensen A method and a device for sensing the distance between a first object and a second object
US5724875A (en) * 1995-10-10 1998-03-10 Black & Decker Inc. Guard and control apparatuses for sliding compound miter saw
US5722308A (en) 1995-10-10 1998-03-03 Black & Decker Inc. Movable fence for a machine tool
US5880954A (en) 1995-12-04 1999-03-09 Thomson; Robert Continous real time safety-related control system
US5700165A (en) 1995-12-11 1997-12-23 General Motors Corporation Fused high ampacity electrical quick disconnect
US5730165A (en) * 1995-12-26 1998-03-24 Philipp; Harald Time domain capacitive field detector
US5671633A (en) * 1996-02-12 1997-09-30 Wagner Electronic Products, Inc. Plate array for moisture sensor with reduced sensitivity to loading effects
US5921367A (en) * 1996-03-01 1999-07-13 Mitsubishi Cable Industries, Ltd. Safety device for a kneading machine using rolls
DE19609771A1 (en) 1996-03-13 1998-06-04 Jan Nieberle Active safety device for table-mounted circular saws
WO1997035145A1 (en) 1996-03-19 1997-09-25 Doherty Steven G Machine safety guard
US5695306A (en) * 1996-05-08 1997-12-09 Lockheed Martin Corp. Fusible member connection apparatus and method
US5875698A (en) 1996-06-17 1999-03-02 Black & Decker Inc. Blade and motor carrier with height/angle adjustment mechanism
US20010032534A1 (en) 1996-06-17 2001-10-25 Warren A. Ceroll Table saw with switched reluctance motor
JP2963053B2 (en) 1996-07-12 1999-10-12 津根精機株式会社 Circular saw cutting machine
US5782001A (en) 1996-08-27 1998-07-21 Gray; John W. Circular saw guard hold and release device
US5791441A (en) 1996-11-25 1998-08-11 Matos; Anthony Brake failure monitoring system
DE19649514A1 (en) 1996-11-29 1998-06-04 Bosch Gmbh Robert Hand tool
US5797307A (en) 1996-12-10 1998-08-25 Horton; Edward H. Portable combination table, cross-cut, rip-cut, and miter saw
US6148504A (en) 1996-12-23 2000-11-21 Eastlex Machine Corporation Operator safety device for attaching apparatus
JP3616223B2 (en) * 1996-12-27 2005-02-02 株式会社ボッシュオートモーティブシステム Solenoid valve driving device
US6037729A (en) 1997-02-06 2000-03-14 Black & Decker Inc. Apparatus and method for braking electric motors
US6757602B2 (en) 1997-02-06 2004-06-29 Automotive Technologies International, Inc. System for determining the occupancy state of a seat in a vehicle and controlling a component based thereon
US5950514A (en) 1997-02-28 1999-09-14 Benedict Engineering Company Miter saw blade guards
US5768786A (en) 1997-03-10 1998-06-23 Kane; Steven F. Hand-held motor or engine powered rigid blade brush cutting device having fail-safe design
JP3439317B2 (en) 1997-04-03 2003-08-25 株式会社エンプラス Molded plastic gear
CA2234576C (en) 1997-05-09 2002-07-09 James Hilliard Table saw
KR100256609B1 (en) 1997-06-03 2000-05-15 윤종용 Overvoltage and surge protection circuit in a hard disk drive
WO1998056529A1 (en) 1997-06-09 1998-12-17 Elektra Beckum Ag Transportable bench circular saw
US6052884A (en) 1997-06-30 2000-04-25 National Railroad Passenger Corporation Conveyorized system for rebuilding tread and disc brake actuator units for use in railway cars
US5933308A (en) 1997-11-19 1999-08-03 Square D Company Arcing fault protection system for a switchgear enclosure
US5963173A (en) * 1997-12-05 1999-10-05 Sensormatic Electronics Corporation Antenna and transmitter arrangement for EAS system
JP3356043B2 (en) 1997-12-26 2002-12-09 三菱電機株式会社 The laser processing apparatus for a distance detector
US5989116A (en) 1998-02-03 1999-11-23 Swift & Company, Inc. High-speed bone-in loin slicer
US20010047706A1 (en) 1998-02-13 2001-12-06 James Parks Table saw
US6139411A (en) 1998-03-03 2000-10-31 Ryobi North America, Inc. Disc sander
CA2327613A1 (en) 1998-04-08 1999-10-14 John J. Egan, Iii Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof
US6470778B1 (en) 1998-05-20 2002-10-29 Black & Decker Inc. Dust collector for a power tool
WO1999062663A1 (en) 1998-05-30 1999-12-09 Kanefusa Kabushiki Kaisha Circular saw cutting machine
JP4178658B2 (en) * 1998-06-30 2008-11-12 株式会社デンソー Capacitive physical quantity detecting device
US6405624B2 (en) 1998-07-08 2002-06-18 Delta International Machinery Corp. Splitter and cutting member guard assembly
US6899004B1 (en) 1998-08-14 2005-05-31 Delta International Machinery Corp. Sawing apparatus and saw fence system
US5970835A (en) 1998-09-10 1999-10-26 Black & Decker Inc. Throat plate for a tool
US6734581B1 (en) 1998-10-28 2004-05-11 Eigenpoint Company Programmable emergency-stop circuit with testing
USD445119S1 (en) 1998-11-20 2001-07-17 Black & Decker Inc. Table saw with telescoping rails
US6216575B1 (en) 1999-02-12 2001-04-17 One World Technologies Inc. Table saw throat plate with blade height scale
US6095092A (en) * 1999-02-18 2000-08-01 Chou; Wayne W. Apparatus and method for confining an animal within a boundary
US6796208B1 (en) 1999-02-19 2004-09-28 Matthew Roy Jorgensen Sawdust collection hood for table saw
US6223865B1 (en) 1999-03-02 2001-05-01 Textron Inc. Golf car having disk brakes and single point latching brake
JP3972064B2 (en) 1999-04-02 2007-09-05 住友化学株式会社 Sensors and safety devices
USD440239S1 (en) 1999-04-13 2001-04-10 Black & Decker Inc. Side panel for a table saw
JP3613066B2 (en) 1999-04-15 2005-01-26 ソニー株式会社 Driving device using a shape memory alloy
ES2152184B1 (en) 1999-04-26 2001-08-16 Sanchez Jose Maria Martinez preventive apparatus accidents, home and circulation.
US6536536B1 (en) 1999-04-29 2003-03-25 Stephen F. Gass Power tools
CA2280378C (en) 1999-04-29 2009-05-26 S&C Electric Company Arrangements to detect and respond to disturbances in electrical power systems
US6227563B1 (en) * 1999-04-30 2001-05-08 Rueben Talisman Airbag responsive seat release safety system
EP1052423B1 (en) 1999-05-14 2004-03-03 I.C.P. S.r.l. Wear detector for a vehicle braking member
US6420814B1 (en) 1999-05-18 2002-07-16 Stephen M. Bobbio Spiral wound transducer
US6360641B1 (en) 1999-06-09 2002-03-26 S-B Power Tool Company Rip fence with dual locking mechanism
US6109157A (en) 1999-06-09 2000-08-29 S-B Power Tool Company Arbor locking mechanism
US6530303B1 (en) 1999-06-10 2003-03-11 Black & Decker Inc. Table saw
US6430007B1 (en) 1999-07-15 2002-08-06 International Business Machines Corporation Air-activated spindle/disk pack locking system
US6119984A (en) * 1999-07-16 2000-09-19 Swales Aerospace Low shock anti-friction release device
CA2285638A1 (en) 1999-07-26 2001-01-26 Louis C. Brickner, Jr. Improved dust collection system
US6133818A (en) * 1999-08-11 2000-10-17 Space Systems/Loral, Inc. Redundant fuse wire release device
US6295910B1 (en) 1999-08-13 2001-10-02 S-B Power Tool Company Clutch assembly for use with a circular saw
US7114494B2 (en) 1999-09-17 2006-10-03 Husqvarna Professional Outdoor Products Inc. Fluid pickup assembly and blade guard for a pavement treatment apparatus
US7377199B2 (en) * 2000-09-29 2008-05-27 Sd3, Llc Contact detection system for power equipment
US7055417B1 (en) 1999-10-01 2006-06-06 Sd3, Llc Safety system for power equipment
US20020056349A1 (en) 2000-09-29 2002-05-16 Gass Stephen F. Miter saw with improved safety system
US6994004B2 (en) 2000-09-29 2006-02-07 Sd3, Llc Table saw with improved safety system
US6877410B2 (en) 2000-09-29 2005-04-12 Sd3, Llc Miter saw with improved safety system
US6957601B2 (en) 2000-08-14 2005-10-25 Sd3, Llc Translation stop for use in power equipment
US6945148B2 (en) 2000-09-29 2005-09-20 Sd3, Llc Miter saw with improved safety system
US7789002B2 (en) * 2000-09-29 2010-09-07 Sd3, Llc Table saw with improved safety system
US8061245B2 (en) 2000-09-29 2011-11-22 Sd3, Llc Safety methods for use in power equipment
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US6813983B2 (en) 2000-09-29 2004-11-09 Sd3, Llc Power saw with improved safety system
CA2389596C (en) * 1999-10-01 2009-06-09 Sd3, Llc Safety systems for power equipment
US20150283630A1 (en) * 2003-12-31 2015-10-08 Sd3, Llc Table saws with elevation mechanisms
US6880440B2 (en) 2000-09-29 2005-04-19 Sd3, Llc Miter saw with improved safety system
US6826988B2 (en) 2000-09-29 2004-12-07 Sd3, Llc Miter saw with improved safety system
US6112785A (en) 1999-10-12 2000-09-05 Yu; Ben Work table having auxiliary sliding table
US6312028B1 (en) 1999-12-04 2001-11-06 Ford Global Technologies, Inc. Motor vehicle energy absorbing member
US6366099B1 (en) * 1999-12-21 2002-04-02 Conrad Technologies, Inc. Differential capacitance sampler
US6889585B1 (en) 2000-01-04 2005-05-10 International Business Machines Corporation Cutter blade position detection mechanism and method of reporting cutter malfunction
US6578856B2 (en) 2000-01-10 2003-06-17 W. Scott Kahle Collapsible portable saw stand
US6283002B1 (en) 2000-01-28 2001-09-04 Pei-Lieh Chiang Table saw apparatus
US6352137B1 (en) 2000-03-22 2002-03-05 Indian Head Industries, Inc. Brake monitoring system
JP2001348014A (en) * 2000-06-02 2001-12-18 Sankyo Seiki Mfg Co Ltd Original display preparing apparatus, and hot stamp unit
JP2002021978A (en) 2000-07-06 2002-01-23 Enplas Corp Resin-made gear and metal molding structure
US6492802B1 (en) 2000-07-14 2002-12-10 Ge Medical Technology Services, Inc. Apparatus and method for detecting defects in a multi-channel scan driver
US6920814B2 (en) 2000-08-14 2005-07-26 Sd3, Llc Cutting tool safety system
US7353737B2 (en) 2001-08-13 2008-04-08 Sd3, Llc Miter saw with improved safety system
US8065943B2 (en) 2000-09-18 2011-11-29 Sd3, Llc Translation stop for use in power equipment
US7100483B2 (en) * 2000-08-14 2006-09-05 Sd3, Llc Firing subsystem for use in a fast-acting safety system
US7308843B2 (en) * 2000-08-14 2007-12-18 Sd3, Llc Spring-biased brake mechanism for power equipment
US7600455B2 (en) * 2000-08-14 2009-10-13 Sd3, Llc Logic control for fast-acting safety system
US7168502B2 (en) 2000-08-17 2007-01-30 Hilti Aktiengesellschaft Electric power tool with locking mechanism
US7856724B2 (en) 2000-08-17 2010-12-28 Hilti Aktiengesellschaft Electrical power tool with a rotatable working tool
US7290472B2 (en) 2002-01-14 2007-11-06 Sd3, Llc Miter saw with improved safety system
US6601493B1 (en) 2000-10-19 2003-08-05 Grizzly Industrial, Inc. Band saw fence systems and methods
US6361092B1 (en) 2000-11-13 2002-03-26 Daimlerchrysler Corporation Automotive frame bumper interface for discriminated deceleration response
US6578460B2 (en) 2000-12-26 2003-06-17 James A. Sartori Blade guard assembly
JP4521798B2 (en) 2001-01-22 2010-08-11 タカタ株式会社 Seat belt retractor
US6546835B2 (en) 2001-01-25 2003-04-15 Tian Wang Wang Saw blade adjusting device for table saw
US6592067B2 (en) * 2001-02-09 2003-07-15 Georgia-Pacific Corporation Minimizing paper waste carousel-style dispenser apparatus, sensor, method and system with proximity sensor
WO2002066191A1 (en) 2001-02-15 2002-08-29 Htc Products, Inc. Fence with a fine adjustment mechanism
DE20102704U1 (en) 2001-02-16 2001-06-28 Feldmann Christian Circular saw with sensor protection
US6736042B2 (en) 2001-03-01 2004-05-18 Porter-Cable Corporation Work piece guiding system for a table saw
US6484614B1 (en) 2001-05-08 2002-11-26 Durq Machinery Corp. Worktable of workpiece processing machine
US7231856B2 (en) 2001-06-13 2007-06-19 Sd3, Llc Apparatus and method for detecting dangerous conditions in power equipment
US6581655B2 (en) 2001-06-25 2003-06-24 Duro Machinery Corp. Work bench of process machinery
DE60238424D1 (en) * 2001-07-11 2011-01-05 Black & Decker Inc Security mechanisms for a powered tool
US20030056853A1 (en) 2001-09-21 2003-03-27 Gass Stephen F. Router with improved safety system
US6945149B2 (en) 2001-07-25 2005-09-20 Sd3, Llc Actuators for use in fast-acting safety systems
JP3937765B2 (en) * 2001-07-25 2007-06-27 ティアック株式会社 Indicator with a switch device
US7000514B2 (en) 2001-07-27 2006-02-21 Sd3, Llc Safety systems for band saws
US20030037651A1 (en) * 2001-08-13 2003-02-27 Gass Stephen F. Safety systems for power equipment
US20030037655A1 (en) * 2001-08-21 2003-02-27 Chang Chin-Chin Catch structure of rotary cover plate of circular sawing machine
US6832466B2 (en) 2001-09-19 2004-12-21 Cross Tech Manufacturing, Inc. Brush cutter emergency stop system
US7197969B2 (en) * 2001-09-24 2007-04-03 Sd3, Llc Logic control with test mode for fast-acting safety system
US6644157B2 (en) 2001-10-11 2003-11-11 Durq Machinery Corp. Table saw having adjustable worktable
US6640683B2 (en) 2001-10-25 2003-11-04 P&F Brother Industrial Corporation Apparatus for clamping a workpiece-blocking plate of a table saw
US7077039B2 (en) * 2001-11-13 2006-07-18 Sd3, Llc Detection system for power equipment
US6471106B1 (en) 2001-11-15 2002-10-29 Intellectual Property Llc Apparatus and method for restricting the discharge of fasteners from a tool
US20020043776A1 (en) 2001-11-21 2002-04-18 Chuang Bor Yann Mobile machinary base
US6659233B2 (en) 2001-12-04 2003-12-09 Hydro-Aire, Inc. System and method for aircraft braking system usage monitoring
US6722242B2 (en) 2001-12-05 2004-04-20 Bor Yann Chuang Transmission device of a table saw
US6856125B2 (en) * 2001-12-12 2005-02-15 Lifescan, Inc. Biosensor apparatus and method with sample type and volume detection
US20030131703A1 (en) 2002-01-16 2003-07-17 Gass Stephen F. Apparatus and method for detecting dangerous conditions in power equipment
US6619348B2 (en) 2002-01-25 2003-09-16 Tian Wang Wang Adjustable and extendible platform for working table
US20030140749A1 (en) 2002-01-25 2003-07-31 Gass Stephen F. Brake Pawls for power equipment
US6742430B2 (en) 2002-03-18 2004-06-01 Rexon Co., Ltd. Circular sawing machine having a hidden-type infrared guide device
US6684750B2 (en) * 2002-04-29 2004-02-03 Shi-Hui Yu Structure of a connection seat and a suspension seat of the connection seat for a suspension round saw
US6607015B1 (en) 2002-05-09 2003-08-19 Rexon Industrial Corp., Ltd. Foldable worktable
US20030213349A1 (en) 2002-05-16 2003-11-20 Chin-Chin Chang Table saw having a workpiece positioning and push cutting device
JP3732463B2 (en) 2002-06-07 2006-01-05 日本航空電子工業株式会社 Click feeling with switch unit
US20040040426A1 (en) * 2002-08-27 2004-03-04 Gass Stephen F. Miter saw with improved safety system
US6874399B2 (en) 2002-09-18 2005-04-05 Wy Peron Lee Cutting machine with built-in miter cutting feature
US6966350B1 (en) 2002-09-25 2005-11-22 Delta International Machinery Corp. Power tool supporting cabinet with a detachable dust bin
US20040060404A1 (en) 2002-09-30 2004-04-01 Emerson Electric Co. Breakaway hub for saw
US7137327B2 (en) 2002-10-31 2006-11-21 Black & Decker Inc. Riving knife assembly for a dual bevel table saw
WO2004041490A3 (en) 2002-10-31 2004-07-29 Delta Int Machinery Corp Dual bevel table saw
CA2448479C (en) 2002-11-12 2009-05-05 Makita Corporation Power tools
WO2004045814A1 (en) 2002-11-18 2004-06-03 Young-Suok Lee Apparatus for cutting lumber
US6854371B2 (en) 2002-12-09 2005-02-15 Shi-Whi Yu Device for smooth sliding of a positioning rod of a sawing device platform
DE10261791A1 (en) 2002-12-23 2004-07-15 Robert Bosch Gmbh Contact protection device and method for protecting the touch of a movable part
US7698975B2 (en) 2003-01-31 2010-04-20 Techtronic Power Tools Technology Limited Table saw with cutting tool retraction system
US20040194594A1 (en) 2003-01-31 2004-10-07 Dils Jeffrey M. Machine safety protection system
US7249549B2 (en) 2003-02-18 2007-07-31 Thomas Stoffel Zero-clearance table saw insert
US7098800B2 (en) 2003-03-05 2006-08-29 Sd3, Llc Retraction system and motor position for use with safety systems for power equipment
US6874397B2 (en) 2003-05-08 2005-04-05 P&F Brother Industrial Corporation Circular cutter with a friction-provided plate
US6922153B2 (en) * 2003-05-13 2005-07-26 Credo Technology Corporation Safety detection and protection system for power tools
US20040255745A1 (en) 2003-06-23 2004-12-23 One World Technologies Limited Table saw guard assembly
US20050041359A1 (en) 2003-08-20 2005-02-24 Gass Stephen F. Motion detecting system for use in a safety system for power equipment
US7836804B2 (en) * 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
US7472634B2 (en) * 2003-08-20 2009-01-06 Sd3, Llc Woodworking machines with overmolded arbors
US6968767B2 (en) 2003-08-20 2005-11-29 Hsi Hui Yu Saw machine having two saw blades
JP2005088248A (en) 2003-09-12 2005-04-07 Makita Corp Power tool
US6826992B1 (en) 2003-10-21 2004-12-07 Durq Machinery Corp. Detachable saw blade guard mounting structure for bench saw
US6942229B2 (en) 2003-10-31 2005-09-13 One World Technologies Limited Collapsible stand for a bench-top power tool
US20050139056A1 (en) 2003-12-31 2005-06-30 Gass Stephen F. Fences for table saws
US8459157B2 (en) 2003-12-31 2013-06-11 Sd3, Llc Brake cartridges and mounting systems for brake cartridges
US7707920B2 (en) * 2003-12-31 2010-05-04 Sd3, Llc Table saws with safety systems
US7536238B2 (en) * 2003-12-31 2009-05-19 Sd3, Llc Detection systems for power equipment
US20050139459A1 (en) 2003-12-31 2005-06-30 Gass Stephen F. Switch box for power tools with safety systems
US7827890B2 (en) 2004-01-29 2010-11-09 Sd3, Llc Table saws with safety systems and systems to mount and index attachments
US7134373B1 (en) * 2004-02-23 2006-11-14 James Perry Vice Throat insert for a table saw
US7540223B2 (en) 2004-03-12 2009-06-02 Makita Corporation Mountings for riving knives of table saws
US7191692B2 (en) 2004-03-22 2007-03-20 Durq Machinery Corp. Table saw
DE202004004463U1 (en) 2004-03-22 2004-08-12 Durq Machinery Corp., Shen Kang Saw bench with circular saw unit, has dust guard with tubular extension movable along curved opening in table side wall
US7665393B2 (en) 2004-04-22 2010-02-23 Black & Decker Inc. Table saw guard
JP2006026283A (en) * 2004-07-21 2006-02-02 Konica Minolta Medical & Graphic Inc Radiography system
US7400239B2 (en) * 2004-09-03 2008-07-15 Simply Automated, Incorporated Universal control apparatus and methods
US20060219076A1 (en) 2005-03-31 2006-10-05 Gass Stephen F Table saw throat plates and table saws including the same
US7481140B2 (en) * 2005-04-15 2009-01-27 Sd3, Llc Detection systems for power equipment
US7421932B1 (en) 2005-05-19 2008-09-09 Power Tool Institute Power cutting tool comprising a radar sensing system
US7210386B1 (en) 2005-11-02 2007-05-01 Kingsand Machinery Ltd. Quickly detachable protective cover unit of a table sawing machine
US20080055836A1 (en) * 2006-08-25 2008-03-06 The Boeing Company System and method for compartment control
US7721633B2 (en) 2006-10-24 2010-05-25 Gaw Stanley E Dual bevel table and slide miter saw
DE102006058749A1 (en) * 2006-12-12 2008-06-19 Robert Bosch Gmbh Hand tool protective device
DE602008001000D1 (en) * 2007-02-20 2010-06-02 Bosch Gmbh Robert Decoupling mechanism for power tools
US7905786B2 (en) * 2007-02-20 2011-03-15 Robert Bosch Gmbh Decoupling mechanism for power tools
US8646369B2 (en) * 2007-10-01 2014-02-11 Sd3, Llc Table saw guards, splitter assemblies, accessories, and table saws including the same
US7971613B2 (en) * 2007-12-31 2011-07-05 Sd3, Llc Detection systems for power equipment
US8082826B2 (en) 2008-03-25 2011-12-27 Power Tool Institute Saw accessories and clamp for use therewith
US7980163B2 (en) 2008-05-20 2011-07-19 Black & Decker Inc. Air deflector assemblies for miter saws
US9981326B2 (en) * 2008-08-18 2018-05-29 Sawstop Holding Llc Table saw
US8274233B2 (en) * 2008-11-25 2012-09-25 Lutron Electronics Co., Inc. Load control device having a visual indication of energy savings and usage information
DE102008054698A1 (en) * 2008-12-16 2010-06-17 Robert Bosch Gmbh machine tool
US20100307308A1 (en) 2009-06-09 2010-12-09 Butler David J Blade enclosure for a table saw
US8418591B2 (en) 2009-07-24 2013-04-16 Robert Bosch Gmbh Power table saw with extension table
US20110057374A1 (en) 2009-09-10 2011-03-10 James Liu Worktable and Its Mounting Structure
US9586335B2 (en) 2010-01-27 2017-03-07 Sd3, Llc Blade guard with dust collection
US8752462B2 (en) 2010-08-13 2014-06-17 Robert Bosch Gmbh Dust management system in a table saw
US8726773B2 (en) 2010-10-19 2014-05-20 Robert Bosch Gmbh Table saw having airflow apparatus
US20130299325A1 (en) * 2011-06-06 2013-11-14 Andrew (Andrzej) Lewicki "On - on master switch"
US9261234B2 (en) * 2012-02-17 2016-02-16 Johnson Industries, Inc. Safety system
US8587147B2 (en) * 2012-02-17 2013-11-19 Johnson Industries, Inc. Safety system
WO2014165281A1 (en) * 2013-03-12 2014-10-09 Robotica, Inc. Photonic box opening system
US20160016240A1 (en) * 2013-03-12 2016-01-21 Robert Bosch Gmbh Workpiece Material Detector for a Power Tool
US20160243632A9 (en) * 2013-11-01 2016-08-25 Sd3, Llc Table saws
US20150277431A1 (en) * 2014-04-01 2015-10-01 The M. K. Morse Company Saw data acquisition system and method of operating a saw

Patent Citations (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170370B2 (en) *
US146886A (en) * 1874-01-27 Improvement in sawing-machines
US1896924A (en) * 1933-02-07 Table fob saws ob the like
US982312A (en) * 1910-02-04 1911-01-24 Edmond O Swafford Wood-sawing machine.
US1050649A (en) * 1910-05-28 1913-01-14 Crescent Machine Company Saw-guard.
US1054558A (en) * 1912-07-29 1913-02-25 Nye Company Self-adjusting support for circular-saw and shaper guards.
US1126970A (en) * 1913-02-10 1915-02-02 Eastman Kodak Co Saw-guard.
US1255886A (en) * 1915-11-23 1918-02-12 Emerald E Jones Saw-guard.
US1526128A (en) * 1923-10-20 1925-02-10 Flohr Andrew Saw guard
US1527587A (en) * 1923-12-07 1925-02-24 Hutchinson Frank Saw guard
US1701948A (en) * 1925-04-02 1929-02-12 Crowe Mfg Corp Portable saw
US1616478A (en) * 1926-01-19 1927-02-08 Julius C Reiche Guard for circular saws
US1988102A (en) * 1932-04-02 1935-01-15 William H Woodward Circular saw machine
US2106288A (en) * 1934-09-27 1938-01-25 Herbert E Tautz Circular saw apparatus
US2106321A (en) * 1937-02-16 1938-01-25 Guertin Gilles Saw guard
US2312118A (en) * 1940-07-31 1943-02-23 Ray H Neisewander Adjustable woodworking machine
US2392486A (en) * 1943-10-20 1946-01-08 Melvin J Larsen Machine tool
US2496613A (en) * 1944-05-30 1950-02-07 William H Woodward Guard for rotary disks
US2434174A (en) * 1944-06-19 1948-01-06 Joseph P Morgan Safety brake for band-saw blades
US2626639A (en) * 1950-11-04 1953-01-27 Duro Metal Products Co Belt and pulley drive means for tiltable saws and the like
US2625966A (en) * 1951-06-01 1953-01-20 Callender Foundry & Mfg Compan Motor and belt drive for tilt arbor saws
US2736348A (en) * 1954-04-23 1956-02-28 Kropp Forge Company Band saw blade trap
US2731049A (en) * 1954-06-10 1956-01-17 Orville C Akin Saw guard assembly for rotary table saws
US2873773A (en) * 1954-06-14 1959-02-17 King Seeley Corp Shiftable motor drive for tilting arbor saw
US3021881A (en) * 1956-12-31 1962-02-20 Yuba Cons Ind Inc Power saw
US3232326A (en) * 1962-10-04 1966-02-01 Rockwell Mfg Co Blade guard and splitter assembly for table saws
US4190000A (en) * 1962-10-23 1980-02-26 The United States Of America As Represented By The Secretary Of The Army Mine proximity fuse
US3306149A (en) * 1964-02-12 1967-02-28 Dienes Werke Rotary cutter
US3368596A (en) * 1965-07-09 1968-02-13 John A. Comer Multi-purpose table saw
US3554067A (en) * 1969-02-26 1971-01-12 Joseph Scutella Fail-safe double-action safety guard
US3716113A (en) * 1969-11-01 1973-02-13 Aisin Seiki Warning device for indicating wear of friction pads in disk brake
US3793915A (en) * 1970-09-30 1974-02-26 Agfa Gevaert Ag Film cutting apparatus
US3785230A (en) * 1972-11-08 1974-01-15 Lokey Tool Inc Automatic safety brake for rotary blade equipment
US3863208A (en) * 1973-02-14 1975-01-28 Eaton Corp Vehicle safety system control circuit having a malfunction indicator
US3861016A (en) * 1973-11-19 1975-01-21 Usm Corp Electric safety control mechanism
US3935777A (en) * 1974-06-13 1976-02-03 Alvin Lee Bassett Portable cutting device
US3931727A (en) * 1974-09-09 1976-01-13 Verson Allsteel Press Company Method and system for detecting brake wear in a metal forming machine
US4007679A (en) * 1975-09-22 1977-02-15 Cincinnati Milacron, Inc. Press and safety latch therefor
US4075961A (en) * 1976-05-07 1978-02-28 Burlington Industries, Inc. Injury protection device for machinery
US4070940A (en) * 1977-02-01 1978-01-31 Caterpillar Tractor Co. Machine tool with protective light curtain and work stock holding mechanism
US4184394A (en) * 1977-04-01 1980-01-22 A/S Norcem Motor-driven saw having a circular saw blade
US4249117A (en) * 1979-05-01 1981-02-03 Black And Decker, Inc. Anti-kickback power tool control
US4374552A (en) * 1979-06-29 1983-02-22 Horton Manufacturing Co., Inc. Pivoted lever caliper brake
US4249442A (en) * 1979-07-25 1981-02-10 Black & Decker Inc. Elevation setting mechanism for a table saw and the like
US4251599A (en) * 1979-08-23 1981-02-17 Ramsey Corporation Ferrous metal body coated with an alloy formed by an iron/silicon extended molybdenum plasma spray powder
US4372427A (en) * 1979-09-21 1983-02-08 Valeo Industrial emergency brake
US4372202A (en) * 1980-11-20 1983-02-08 Ross Operating Valve Company Emergency brake for presses
US4492291A (en) * 1981-02-13 1985-01-08 Commissariat A L'energie Atomique Device for damping shocks caused by _moving heavy objects
US4427042A (en) * 1981-05-13 1984-01-24 Emerson Electric Co. Power tool
US4722021A (en) * 1982-09-23 1988-01-26 Robert Bosch Gmbh Safety circuit for hand tools, and method for safe operation thereof
US4637289A (en) * 1984-11-02 1987-01-20 Whirlwind, Inc. Work presence controller
US4566512A (en) * 1985-03-11 1986-01-28 Wilson Basil L R Router attachment
US4644832A (en) * 1985-03-21 1987-02-24 Smith H Reid Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines
US4718229A (en) * 1985-10-30 1988-01-12 Rolls-Royce Plc Failsafe electronic control systems
US4637188A (en) * 1986-02-28 1987-01-20 Owens-Corning Fiberglas Corporation Splicing means for faced insulation batts
US4721023A (en) * 1986-06-20 1988-01-26 Shopsmith, Inc. Saw guard system
US4805504A (en) * 1986-12-29 1989-02-21 Makita Electric Works, Ltd. Safety cover for miter saw
US4896607A (en) * 1987-10-01 1990-01-30 Hall James C Boosted kinetic energy penetrator fuze
US4805505A (en) * 1988-03-02 1989-02-21 John Cantlin Multi-stop
US5083973A (en) * 1989-10-26 1992-01-28 Townsend Engineering Company Safety method and means for stopping meat skinning machines
US5082316A (en) * 1989-12-01 1992-01-21 The Cookson Company Release mechanism and method with alarm circuit
US5086890A (en) * 1990-03-14 1992-02-11 Briggs & Stratton Corporation Engine braking system
US5081406A (en) * 1990-06-26 1992-01-14 Saf-T-Margin, Inc. Proximity responsive capacitance sensitive method, system, and associated electrical circuitry for use in controlling mechanical and electro-mechanical equipment
US5184534A (en) * 1990-11-16 1993-02-09 Samsung Electronics Co., Ltd. Operation safety device for a portable power tool
US5377544A (en) * 1991-12-19 1995-01-03 Motorola, Inc. Rotational vibration gyroscope
US5276431A (en) * 1992-04-29 1994-01-04 Checkpoint Systems, Inc. Security tag for use with article having inherent capacitance
US5285708A (en) * 1992-05-18 1994-02-15 Porter-Cable Corporation Miter saw alignment system
US5392678A (en) * 1992-08-27 1995-02-28 Makita Corporation Miter saw
US5480009A (en) * 1993-09-11 1996-01-02 Andreas Stihl Brake system with two independent mechanical brakes
US5377571A (en) * 1993-10-19 1995-01-03 Josephs; Harold Safety guard system for band saws and similar equipment
US5392568A (en) * 1993-12-22 1995-02-28 Black & Decker Inc. Random orbit sander having braking member
US5592353A (en) * 1994-04-18 1997-01-07 Fujitsu Limited Power supply system
US5720213A (en) * 1994-12-12 1998-02-24 Black & Decker Inc. Bevel table saw adjustment
US5857507A (en) * 1996-09-20 1999-01-12 Black & Decker Inc. Table saw
US6009782A (en) * 1997-06-19 2000-01-04 Makita Corporation Table saw
US6336273B1 (en) * 1997-06-25 2002-01-08 Aktiebolaget Electrolux (Publ) Device to hold and guide an annular shaped saw blade
US5861809A (en) * 1997-09-22 1999-01-19 Checkpoint Systems, Inc. Deactivateable resonant circuit
US6018284A (en) * 1998-07-29 2000-01-25 Schneider Electric Industries Sa Circuit breaker with high electrodynamic strength and breaking capacity
US6170370B1 (en) * 1998-08-19 2001-01-09 Sommerville Design & Manufacturing Inc. Circular saw splitter device with integral anti-kick back
US20060000337A1 (en) * 1999-10-01 2006-01-05 Gass Stephen F Band saw with safety system
US6986370B1 (en) * 2000-02-01 2006-01-17 Home Depot U.S.A., Inc. Table saw
US20020017184A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Table saw with improved safety system
US20020017336A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Apparatus and method for detecting dangerous conditions in power equipment
US20020017182A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake positioning system
US20020017180A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Brake mechanism for power equipment
US20020017175A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Translation stop for use in power equipment
US20020017179A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Miter saw with improved safety system
US20020017178A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Motion detecting system for use in a safety system for power equipment
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US20020017181A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Retraction system for use in power equipment
US20020017176A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Detection system for power equipment
US6502493B1 (en) * 2001-06-27 2003-01-07 Emerson Electric Co. Table saw blade heel adjuster
US20030000359A1 (en) * 2001-06-27 2003-01-02 Eccardt Curtis J. Table saw blade heel adjuster
US20030002942A1 (en) * 2001-07-02 2003-01-02 Gass Stephen F. Discrete proximity detection system
US20030005588A1 (en) * 2001-07-03 2003-01-09 Gass Stephen F. Actuators for use in fast-acting safety systems
US20030015253A1 (en) * 2001-07-18 2003-01-23 Gass Stephen F. Router with improved safety system
USD469354S1 (en) * 2001-12-14 2003-01-28 Black & Decker Inc. Shrink ring protector for circular saw blades
US20040011177A1 (en) * 2002-07-17 2004-01-22 Durq Machinery Corp. Quick-detachable blade guard mounting structure
US6840144B2 (en) * 2002-07-17 2005-01-11 Durq Machinery Corp. Quick-detachable blade guard mounting structure
US20080016998A1 (en) * 2003-04-29 2008-01-24 Keller David V System and Method for Rapidly Stopping a Spinning Table Saw Blade

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7895927B2 (en) 1999-10-01 2011-03-01 Sd3, Llc Power equipment with detection and reaction systems
US20120260782A1 (en) * 1999-10-01 2012-10-18 Gass Stephen F Power equipment with detection and reaction systems
US9925683B2 (en) 1999-10-01 2018-03-27 Sawstop Holding Llc Table saws
US20060225551A1 (en) * 1999-10-01 2006-10-12 Gass Stephen F Safety system for power equipment
US9522476B2 (en) 1999-10-01 2016-12-20 Sd3, Llc Power equipment with detection and reaction systems
US8408106B2 (en) * 1999-10-01 2013-04-02 Sd3, Llc Method of operating power equipment with detection and reaction systems
US8402869B2 (en) * 1999-10-01 2013-03-26 Sd3, Llc Brake mechanism for power equipment
US8196499B2 (en) 1999-10-01 2012-06-12 Sd3, Llc Power equipment with detection and reaction systems
US9969014B2 (en) 1999-10-01 2018-05-15 Sawstop Holding Llc Power equipment with detection and reaction systems
US20110061768A1 (en) * 1999-10-01 2011-03-17 Gass Stephen F Brake mechanism for power equipment
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US8191450B2 (en) 2000-08-14 2012-06-05 Sd3, Llc Power equipment with detection and reaction systems
US20020017181A1 (en) * 2000-08-14 2002-02-14 Gass Stephen F. Retraction system for use in power equipment
US7836804B2 (en) 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
US20050139056A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Fences for table saws
US7866239B2 (en) 2003-12-31 2011-01-11 Sd3, Llc Elevation mechanism for table saws
US20100023137A1 (en) * 2003-12-31 2010-01-28 Gass Stephen F Detection systems for power equipment
US7827893B2 (en) 2003-12-31 2010-11-09 Sd3, Llc Elevation mechanism for table saws
US7991503B2 (en) 2003-12-31 2011-08-02 Sd3, Llc Detection systems for power equipment
US8505424B2 (en) 2004-01-29 2013-08-13 Sd3, Llc Table saws with safety systems and systems to mount and index attachments
US8074546B1 (en) 2005-03-11 2011-12-13 Power Tool Institute Pyrotechnic drop mechanism for power tools
US7888826B1 (en) 2005-05-19 2011-02-15 Power Tool Institute Capacitive sensing system for power cutting tool
US7628101B1 (en) 2006-03-13 2009-12-08 Power Tool Institute Pyrotechnic drop mechanism for power tools
US8186253B2 (en) 2008-09-08 2012-05-29 Power Tool Institute Detection system for power tool
US7739934B2 (en) 2008-09-08 2010-06-22 Power Tool Institute Detection system for power tool
US20100059144A1 (en) * 2008-09-08 2010-03-11 Power Tool Institute Detection system for power tool
US8919231B2 (en) 2008-11-19 2014-12-30 Power Tool Institute Safety mechanisms for power tools
US20110048188A1 (en) * 2009-08-26 2011-03-03 Credo Technology Corporation Table saw with actuator module
US9969013B2 (en) * 2009-08-26 2018-05-15 Robert Bosch Tool Corporation Table saw with actuator module
US8534174B2 (en) 2010-09-27 2013-09-17 Power Tool Institute Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator
US8950305B1 (en) * 2011-08-09 2015-02-10 Innovative Engineering Solutions, Inc. Saw brake

Also Published As

Publication number Publication date Type
US20110056351A1 (en) 2011-03-10 application
US20020017176A1 (en) 2002-02-14 application
US8291797B2 (en) 2012-10-23 grant
US9969014B2 (en) 2018-05-15 grant
US20110061768A1 (en) 2011-03-17 application
US8438958B2 (en) 2013-05-14 grant
US8191450B2 (en) 2012-06-05 grant
US20110072942A1 (en) 2011-03-31 application
US8408106B2 (en) 2013-04-02 grant
US8196499B2 (en) 2012-06-12 grant
US20070199622A1 (en) 2007-08-30 application
US20100236663A1 (en) 2010-09-23 application
US20170072582A1 (en) 2017-03-16 application
US7210383B2 (en) 2007-05-01 grant
US20120167732A1 (en) 2012-07-05 application
US20170072481A1 (en) 2017-03-16 application
US20060230896A1 (en) 2006-10-19 application
US7895927B2 (en) 2011-03-01 grant
US7347131B2 (en) 2008-03-25 grant
US20120260782A1 (en) 2012-10-18 application
US9925683B2 (en) 2018-03-27 grant
US8402869B2 (en) 2013-03-26 grant
US9878380B2 (en) 2018-01-30 grant
US8079292B2 (en) 2011-12-20 grant
US20110023670A1 (en) 2011-02-03 application
US20160008997A1 (en) 2016-01-14 application
US20110023673A1 (en) 2011-02-03 application
US9522476B2 (en) 2016-12-20 grant

Similar Documents

Publication Publication Date Title
US5054352A (en) Miter saw
US5957021A (en) Guard and control apparatuses for sliding compound miter saw
US4028975A (en) Blade guard lift for power saw
US4962685A (en) Production table saw
US7437981B2 (en) Modular guard system and apparatus for a power saw
US6971297B1 (en) Guard and control apparatuses for sliding compound miter saw
US3994192A (en) Circular saw apparatus including safety locking means
US6474206B1 (en) Miter saw with wear plates and orientation system therefor
US5724875A (en) Guard and control apparatuses for sliding compound miter saw
US5074047A (en) Anti-pinch device for chain saw
US5802943A (en) Bevel locking system for a sliding compound miter saw
US5870938A (en) Bevel locking system for a sliding compound miter saw
US4756220A (en) Safety mechanism for saws
US20060101960A1 (en) Optical proximity device for power tools
US4029159A (en) Brake control for rotary electric tools
US5358062A (en) Portable handheld drilling apparatus
US5353670A (en) Independently and jointly operable radial saw guards
US6014813A (en) Power hand saw with powered blade guard assembly
US3821918A (en) Motorized miter box
US4448261A (en) Motorized hand tool for drilling
US4418597A (en) Anti-kickback device
US5331875A (en) Anti-kick forward device for power driven saws
US6182548B1 (en) Guard and control apparatuses for sliding compound miter saw
GB2220128A (en) Seat belt tightening system incorporated with a vehicle seat
US3982616A (en) Latch operated centrifugally released safety clutch for saws

Legal Events

Date Code Title Description
AS Assignment

Owner name: SD3, LLC, OREGON

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GASS, STEPHEN F.;REEL/FRAME:018495/0501

Effective date: 20061107