WO1996022175A3 - Safety device for electrically driven hand tools, in particular circular and compass saws - Google Patents

Safety device for electrically driven hand tools, in particular circular and compass saws Download PDF

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Publication number
WO1996022175A3
WO1996022175A3 PCT/EP1996/000196 EP9600196W WO9622175A3 WO 1996022175 A3 WO1996022175 A3 WO 1996022175A3 EP 9600196 W EP9600196 W EP 9600196W WO 9622175 A3 WO9622175 A3 WO 9622175A3
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
safety device
tool
hand tools
particular circular
Prior art date
Application number
PCT/EP1996/000196
Other languages
German (de)
French (fr)
Other versions
WO1996022175A2 (en
Inventor
Iradj Hessabi
Original Assignee
Iradj Hessabi
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
Application filed by Iradj Hessabi filed Critical Iradj Hessabi
Priority to AU46198/96A priority Critical patent/AU4619896A/en
Priority to EP96901733A priority patent/EP0873226A2/en
Publication of WO1996022175A2 publication Critical patent/WO1996022175A2/en
Publication of WO1996022175A3 publication Critical patent/WO1996022175A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/006—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for reciprocating saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F16D27/118—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with interengaging jaws or gear teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety 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
    • F16P3/12—Safety 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D2027/002—Electric or electronic circuits relating to actuation of electromagnetic clutches

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Sawing (AREA)

Abstract

The invention concerns a safety device for electrically operated hand tools (1), in particular circular and compass saws in which the motor drive is transmitted via a clutch plate with a clutch (10) to a tool (5) fitted on a tool carrier (4). The safety device in question is provided with an electronic sensor circuit (SÜS) with lifting magnet control (HS) which, if the tool (5) comes into contact with any part of the operator's body, breaks the connection between the drive motor (8) and tool (10) by causing the clutch magnetically to disengage. To ensure easy re-engagement of the clutch (10) where there is no danger to the operator, it is proposed that the disengageable clutch should be provided with coupling elements (13, 16) capable of axial displacement or radial excursion, the said coupling elements being displaced/lifted by a lifting magnet (15) once energised out of the seats (11, 25) which create the force flux.
PCT/EP1996/000196 1995-01-20 1996-01-18 Safety device for electrically driven hand tools, in particular circular and compass saws WO1996022175A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU46198/96A AU4619896A (en) 1995-01-20 1996-01-18 Safety device for electrically driven hand tools, in paricular circular and compass saws
EP96901733A EP0873226A2 (en) 1995-01-20 1996-01-18 Safety device for electrically driven hand tools, in particular circular and compass saws

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995101579 DE19501579A1 (en) 1995-01-20 1995-01-20 Safety device for electrically powered hand tools, in particular jigsaws and circular saws
DE19501579.7 1995-01-20

Publications (2)

Publication Number Publication Date
WO1996022175A2 WO1996022175A2 (en) 1996-07-25
WO1996022175A3 true WO1996022175A3 (en) 1996-10-24

Family

ID=7751881

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/000196 WO1996022175A2 (en) 1995-01-20 1996-01-18 Safety device for electrically driven hand tools, in particular circular and compass saws

Country Status (5)

Country Link
EP (1) EP0873226A2 (en)
AU (1) AU4619896A (en)
DE (1) DE19501579A1 (en)
TW (1) TW349898B (en)
WO (1) WO1996022175A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1298236B1 (en) * 1998-02-13 1999-12-20 Bruno Pianu PORTABLE SAW DECORTING MACHINE, WITH ELECTRONIC SENSITIVE FOOT, ESPECIALLY FOR CORK
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
DE102009045944A1 (en) * 2009-10-23 2011-04-28 Robert Bosch Gmbh Protection sensor for hand-held power tool
ITFI20120055A1 (en) * 2012-03-15 2013-09-16 Flash Elettronica Di Duccio Gemigna Ni ELECTRIC CUTTING TOOL WITH SAFETY STOP
DE102017201493A1 (en) * 2017-01-31 2018-08-02 Robert Bosch Gmbh Circular saw, in particular circular saw
DE102019208898A1 (en) * 2019-06-19 2020-12-24 Robert Bosch Gmbh Hand machine tool with at least one safety brake device

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554124A (en) * 1946-03-05 1951-05-22 Zita Wallace Salmont Means for automatic control of machinery or other devices
DE1935071A1 (en) * 1969-07-10 1971-02-11 Philips Patentverwaltung Electromagnetically actuated form-fitting step-by-step coupling
DE2064524A1 (en) * 1970-01-19 1971-07-29 Ehtex Zavody textilniho strojirenst vi generalm rzeditelstvi, Reichenberg (Tschechoslowakei) Electromagnetic clutch for textile machines, especially for machines for spindleless fine spinning
DE2055681A1 (en) * 1970-11-12 1972-05-18 Ece Gmbh Electromagnetic clutch
DE2227184B1 (en) * 1972-06-03 1973-10-25 PROTECTIVE CIRCUIT FOR TAPE KNIFE MACHINES
DE2705581A1 (en) * 1976-05-25 1977-12-08 Kichi Yoneda EMERGENCY STOP DEVICE FOR A BANDSAW
DE2804884A1 (en) * 1978-02-04 1979-08-16 Bosch Gmbh Robert MAGNETIC CLUTCH
FR2502273A1 (en) * 1981-03-17 1982-09-24 Walterscheid Gmbh Jean SAFETY RELEASE FOR A SPLITTER ATTACHED TO AN AGRICULTURAL TRACTOR
DE3145116A1 (en) * 1981-03-17 1983-05-26 Jean Walterscheid Gmbh, 5204 Lohmar Shiftable safety coupling
FR2556643A1 (en) * 1983-12-20 1985-06-21 Stempniakowski Tonny Safety electronic contact detector
FR2575529A1 (en) * 1984-12-31 1986-07-04 Darval Device for blocking a rotating part with the object of locking
DE9109573U1 (en) * 1991-08-04 1991-12-12 Hessabi, Iradj, Dipl.-Ing., 4811 Oerlinghausen Sawing tool

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554124A (en) * 1946-03-05 1951-05-22 Zita Wallace Salmont Means for automatic control of machinery or other devices
DE1935071A1 (en) * 1969-07-10 1971-02-11 Philips Patentverwaltung Electromagnetically actuated form-fitting step-by-step coupling
DE2064524A1 (en) * 1970-01-19 1971-07-29 Ehtex Zavody textilniho strojirenst vi generalm rzeditelstvi, Reichenberg (Tschechoslowakei) Electromagnetic clutch for textile machines, especially for machines for spindleless fine spinning
DE2055681A1 (en) * 1970-11-12 1972-05-18 Ece Gmbh Electromagnetic clutch
DE2227184B1 (en) * 1972-06-03 1973-10-25 PROTECTIVE CIRCUIT FOR TAPE KNIFE MACHINES
DE2705581A1 (en) * 1976-05-25 1977-12-08 Kichi Yoneda EMERGENCY STOP DEVICE FOR A BANDSAW
DE2804884A1 (en) * 1978-02-04 1979-08-16 Bosch Gmbh Robert MAGNETIC CLUTCH
FR2502273A1 (en) * 1981-03-17 1982-09-24 Walterscheid Gmbh Jean SAFETY RELEASE FOR A SPLITTER ATTACHED TO AN AGRICULTURAL TRACTOR
DE3145116A1 (en) * 1981-03-17 1983-05-26 Jean Walterscheid Gmbh, 5204 Lohmar Shiftable safety coupling
FR2556643A1 (en) * 1983-12-20 1985-06-21 Stempniakowski Tonny Safety electronic contact detector
FR2575529A1 (en) * 1984-12-31 1986-07-04 Darval Device for blocking a rotating part with the object of locking
DE9109573U1 (en) * 1991-08-04 1991-12-12 Hessabi, Iradj, Dipl.-Ing., 4811 Oerlinghausen Sawing tool

Also Published As

Publication number Publication date
EP0873226A2 (en) 1998-10-28
WO1996022175A2 (en) 1996-07-25
DE19501579A1 (en) 1996-07-25
AU4619896A (en) 1996-08-07
TW349898B (en) 1999-01-11

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