US3568909A - Fastener driving machine - Google Patents

Fastener driving machine Download PDF

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Publication number
US3568909A
US3568909A US843942A US3568909DA US3568909A US 3568909 A US3568909 A US 3568909A US 843942 A US843942 A US 843942A US 3568909D A US3568909D A US 3568909DA US 3568909 A US3568909 A US 3568909A
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US
United States
Prior art keywords
piston
driving machine
fastener driving
bumper
housing
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.)
Expired - Lifetime
Application number
US843942A
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English (en)
Inventor
Garry R Perkins
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.)
VENICULUM INCORPORATED 1100 HICKS ROAD ROLLING MEADOWS IL A CORP OF
Spotnails Inc
Original Assignee
Spotnails Inc
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Filing date
Publication date
Application filed by Spotnails Inc filed Critical Spotnails Inc
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Publication of US3568909A publication Critical patent/US3568909A/en
Assigned to BANKERS TRUST COMPANY, A NY BANKING CORPORATION reassignment BANKERS TRUST COMPANY, A NY BANKING CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VENICULUM INCORPORATED
Assigned to VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING MEADOWS, IL A CORP OF reassignment VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING MEADOWS, IL A CORP OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SWINGLINE INC.
Assigned to BANKERS TRUST COMPANY A NEW YORK BANKING CORP reassignment BANKERS TRUST COMPANY A NEW YORK BANKING CORP SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VENICULUM INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder

Definitions

  • a fastener driving machine is adapted shown I having a housing with a piston movable therewithin.
  • An air pressure system is to move the piston in a driving stroke and a bumper is abuttable with the piston at the end of the driving stroke.
  • An air return chamber is connected to the housing by means of a plurality of openings within the housing and these openings are normally below the piston at the time that the piston commences its return stroke. These openings will be above the piston if the bumper is damaged and, therefore, will not permit the machine to operate in this condition.
  • the conventional fluid-operated fastener driving machine consists of a housingand a piston reciprocatingly movable within the housing.
  • the piston is controlled by means of impingement of pressure air thereupon which is brought into impingement with the piston by means of valve structure.
  • Other valve structure is provided in order to return the piston after the completion of the driving stroke. Since the driving stroke of the piston is produced by impingement of considerable force thereupon a resilient bumper is provided to cushion the shock.
  • the bumper because of the considerable impact that has been placed against it, will fail.
  • the bumper is, of course, normally invisible to the operator of the machine. Hence the machine is operated, in many cases, when the bumper has already failed.
  • One of the objects of this invention is to provide a system which will automatically prevent the tool from operating if the bumper is damaged.
  • a further object of this invention is, at the same time that the safety feature involved herein is provided, to produce an air return system which will be simple and foolproof in opera tion.
  • Another object of this invention is to provide a tool of extremely compact construction because the air return system involved is carried by the magazine.
  • Another object of this invention is to provide a safety mechanism which is simple and foolproof in operation and is inexpensive to manufacture.
  • FIG. 1 is a front elevational view, partly in section, showing a fastener driving machine containing the improvements of this invention.
  • FIG. 2 is an enlarged detail sectional view of the safety mechanism utilized in the fastener driving machine of this invention.
  • the manually actuated trigger has been depressed by the control valve plunger will not operate.
  • FIG. Za is a view similar to that of FIG. 2 but showing the position of the parts when the safety trigger and manually operated trigger are both depressed.
  • FIG. 3 is a view similar to that of FIG. 2 but showing the parts in the normal rest position.
  • FIG. 4 is a cross-sectional view showing the valve plunger and associated parts taken along lines 44 of FIG. 2.
  • a fastener driving machine 11 which includes an outer casing 12 which contains a housing (cylinder) 13 therewithin. Within cylinder 13 a piston 14 is reciprocatingly movable. Piston 14 has an opening 15 therewithin through which a pin 16 is disposed. Pin 16 is in turn connected to driver blade 17. Piston 14 also bears a downwardly depending portion 18 which is adapted to fit within an opening 19 which is provided within bumper 20. Bumper 20 is made of a resilient material such as rubber and contains an additional opening 21 therewithin through which driver blade 17 passes. Opening 21 is not sealed with respect to the passage of air so that air may pass therethrough during the operation of this device as will be subsequently explained.
  • Housing 13 bears a plurality of spaced openings 23 therewithin and an additional plurality of spaced openings 24 which are downwardly spaced from openings 23 and are larger in diameter. Openings 23 and 24 are spaced about the periphery of housing 13.
  • Driver blade 17 fits within a slot 25 which is disposed within the forward portion of magazine 26.
  • A. plurality of fasteners 27 are disposed within magazine 26 and are sequentially propelled into position to impinge with driver blade 17 by follower means 28.
  • An air return chamber 29 is carried by magazine 26 and openings 23 and 24 join the interior of housing 13 with air return chamber 29
  • a poppet valve member 30 Above housing 13 and within member 12 is a poppet valve member 30.
  • Poppet valve 30 contains an opening 32 therewithin and is upwardly and downwardly movable within opening 31 disposed within member 12.
  • Poppet valve 30 bears an upwardly extending portion 33' therewithin which portion carries a spring 34 normally biasing the valve in the downward position.
  • a seal 35 is provided and an opening to atmosphere 36 is likewise provided.
  • Piston 14 is sealed within housing 13 by means of 0 rings 37 and poppet 30 is likewise sealed within chamber 31 by means of 0 rings 38 and 38a.
  • Pressure air chamber 39 is provided within member 12. Chamber 39 is connected to a source of pressure air through opening 40 and conduit 40a. Chamber 3 9 is under air pressure. In the normal rest position of the device pressure air is also present within chamber 31 and this pressure air reaches chamber 31 through conduit 41 which in turn is connected to chamber 42 which in turn is connected to conduit 42a which extends into chamber 400 and thus permits pressure air to proceed where desired.
  • valve plunger 43 In the normal rest position of the device valve plunger 43 is in the position shown in FIG. 3 and is sealed within chamber 42 by means of an 0 ring 44. Member 43 is maintained in the down position by means of spring 45. Member 43 can be selectively actuated either by link 49 (which is connected to a downwardly depending probe 50 which has a right-angle bend thereupon) or by a hand-operated trigger 47. However, either of these elements will not move valve stem 43 sufficiently in order to cause 0 ring 44 to pass the lower portion 50 of conduit 41. It is noted that trigger 47 is pivotally connected at 48 and member 49 is pivotally connected to member 50. Mem' bers 49 and 47 are slidably connected to one another at 51.
  • Trigger 47 may then be manually controlled to move valve member 43 in the position shown in FIG. 2a. At this point pressure air is no longer supplied through port 52 into conduit 41 but, instead, the pressure air contained in space 31 is being released to atmosphere through the flutes between elements 46. Since pressure air is always acting on the lower portion of poppet 30, poppet 30 then rises and seals against members 35 and 53 thereby permitting pressure air to impinge on piston 14. This causes piston 14 to move downwardly and rapidly and causes the lower portion of piston 14 to abut bumper 20.
  • bumper 20 Since bumper 20 is resilient and is not of sufficient size to fill housing 13 completely, bumper 20 at the point of its initial contact with piston 14 is compressed and causes piston 14, for a short instant, to go below the level of openings 23. This permits pressure air to pass through openings 23 and into chamber 29. However, the resiliency of the bumper almost immediately thereafter, causes piston 14 to lie above the level openings 23. Pressure air also flows through opening 22 within piston 14 and enters chamber 29. This condition will continueuntil trigger 47 or, selectively link 49 is released and the valve stem 43 assumes the positions shown in FIGS. 2 and 3. At that point, of course, pressure air again flows through port 52 into conduit 41 and repressurizes space 31. This causes poppet 30 to assume the position shown in FIG.
  • openings 24 air flowing through openings 24 will cool bumper 20 and prolong its life. Also some pressure air will flow through opening 21 and thus will prevent dirt from jamming the mechanism.
  • piston 14 will remain below the levels of openings 23. This means, of course, that the pressure air contained in chamber 29 will act above piston 14 rather than below it. However, this pressure air will then exhaust through opening 32 and 36 to atmosphere. Thereby preventing the piston from returning. The operator of the device will, of course, immediately know, at that point, that something is wrong and will bring the device in for servicing for replacement of the bumper.
  • a fastener driving machine comprising, in combination, a housing, a piston reciprocatingly movable within said housing, fastener driving means operatively connected to said piston, pressure air means selectively adapted to move said piston in a driving direction, resilient bumper means adapted to abut said piston at the end of said driving movement, an air return chamber, continuously open air passage means normally below said piston and joining said housing to said air return chamber, means permitting pressure air to enter said air return chamber during the driving stroke of said piston, said air passage means being closed by said piston at the time that the piston commences its return stroke but said passage means being opened if said bumper means are at least partially destroyed.
  • passage means being a plurality of spaced openings connectinasaid housing with said air return chamber.
  • a fastener driving machine as described in claim 2 including a second plurality of spaced openings connecting said housing and said air return chamber spaced below said first openings.
  • a fastener driving machine as described in claim 2 said second openings being larger than said first openings.
  • a fastener driving machine as described in claim 4 including an elongated magazine for storage of fasteners connected to said housing and fastener advancing means within said magazine, said magazine also carrying a portion of said air return chamber.
  • a fastener driving machine as described in claim 1 said opening being diagonally and outwardly extending.
  • a fastener driving machine as described in claim 6 said bumper provided with a cavity therewithin and said piston having a downwardly depending portion adapted to fit within said cavity when said piston and said bumper are in abutting w relationship.
  • said bumper means having a portion lying between said first and said second plurality of spaced openings.
  • a fastener driving machine as described in claim 5 said means permitting pressure air to enter said air return chamber during the driving movement of said piston comprising an opening provided within said piston.
  • a fastener driving machine as described in claim 7 said bumper being also provided with an inclined portion therein adjacent said second plurality of spaced openings.
  • a fastener driving machine as described in claim 1 said bumper provided with an inclined portion adjacent said air passage means.
  • a fastener driving machine as described in claim 5 said means permitting pressure air to enter said air return chamber during the driving movement of said piston comprising the resiliency of said bumper permitting said piston to pass below said first plurality of spaced openings.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US843942A 1969-07-23 1969-07-23 Fastener driving machine Expired - Lifetime US3568909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84394269A 1969-07-23 1969-07-23

Publications (1)

Publication Number Publication Date
US3568909A true US3568909A (en) 1971-03-09

Family

ID=25291381

Family Applications (1)

Application Number Title Priority Date Filing Date
US843942A Expired - Lifetime US3568909A (en) 1969-07-23 1969-07-23 Fastener driving machine

Country Status (5)

Country Link
US (1) US3568909A (enrdf_load_stackoverflow)
CA (1) CA961201A (enrdf_load_stackoverflow)
DE (1) DE2035452C3 (enrdf_load_stackoverflow)
FR (1) FR2051005A5 (enrdf_load_stackoverflow)
GB (1) GB1267141A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771710A (en) * 1971-09-27 1973-11-13 Spotnails Pneumatically powered fastener-driving tool
US3795357A (en) * 1971-03-09 1974-03-05 Bukama Gmbh Stapling or nailing device operated by pressure medium
US4319706A (en) * 1978-11-17 1982-03-16 Halstead Donald B Percussion tool
US5207143A (en) * 1991-05-16 1993-05-04 Umberto Monacelli Pneumatic fastener driving apparatus with an improved valve
US20040188488A1 (en) * 2000-01-24 2004-09-30 Hitachi Koki Co., Ltd. Trigger valve apparatus for a pneumatic tool
US20050184120A1 (en) * 2004-02-20 2005-08-25 Terrell Timothy E. Dual mode pneumatic fastener actuation mechanism
US20050189396A1 (en) * 2004-02-24 2005-09-01 Leasure Jeremy D. Pneumatic fastener
US20050189394A1 (en) * 2004-02-24 2005-09-01 Terrell Timothy E. Pneumatic fastener
US20060273132A1 (en) * 2003-12-31 2006-12-07 Leasure Jeremy D Pneumatic fastener
US20070113733A1 (en) * 2004-01-20 2007-05-24 Yoshiichi Komazaki Pneumatically operated fastener driving tool
US20090218383A1 (en) * 2006-06-01 2009-09-03 Ricardo Segura Control Valve Assembly for Fastener-Driving Tool
WO2009123533A1 (en) * 2008-03-31 2009-10-08 Atlas Copco Construction Tools Ab Percussion tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278106A (en) * 1965-04-15 1966-10-11 Senco Products Firing control means
US3278105A (en) * 1965-09-22 1966-10-11 Senco Products Firing control means
US3353737A (en) * 1965-12-27 1967-11-21 Signode Corp Nail feeding mechanism for pneumatically operable impact tools
US3496840A (en) * 1968-01-29 1970-02-24 Fastener Corp Fastener driving apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278106A (en) * 1965-04-15 1966-10-11 Senco Products Firing control means
US3278105A (en) * 1965-09-22 1966-10-11 Senco Products Firing control means
US3353737A (en) * 1965-12-27 1967-11-21 Signode Corp Nail feeding mechanism for pneumatically operable impact tools
US3496840A (en) * 1968-01-29 1970-02-24 Fastener Corp Fastener driving apparatus

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795357A (en) * 1971-03-09 1974-03-05 Bukama Gmbh Stapling or nailing device operated by pressure medium
US3771710A (en) * 1971-09-27 1973-11-13 Spotnails Pneumatically powered fastener-driving tool
US4319706A (en) * 1978-11-17 1982-03-16 Halstead Donald B Percussion tool
US5207143A (en) * 1991-05-16 1993-05-04 Umberto Monacelli Pneumatic fastener driving apparatus with an improved valve
US7014089B2 (en) * 2000-01-24 2006-03-21 Hitachi Koki Co., Ltd. Trigger valve apparatus for pneumatic tool
US20040188488A1 (en) * 2000-01-24 2004-09-30 Hitachi Koki Co., Ltd. Trigger valve apparatus for a pneumatic tool
US20060273132A1 (en) * 2003-12-31 2006-12-07 Leasure Jeremy D Pneumatic fastener
US7398647B2 (en) * 2004-01-20 2008-07-15 Hitachi Koki Co., Ltd. Pneumatically operated fastener driving tool
US20070113733A1 (en) * 2004-01-20 2007-05-24 Yoshiichi Komazaki Pneumatically operated fastener driving tool
US20070034660A1 (en) * 2004-02-20 2007-02-15 Black & Decker Inc. Dual mode pneumatic fastener actuation mechanism
US20050184120A1 (en) * 2004-02-20 2005-08-25 Terrell Timothy E. Dual mode pneumatic fastener actuation mechanism
US8556149B2 (en) 2004-02-20 2013-10-15 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fastener
US7137540B2 (en) 2004-02-20 2006-11-21 Black & Decker Inc. Dual mode pneumatic fastener actuation mechanism
US7484649B2 (en) 2004-02-20 2009-02-03 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fasteners
US20050189393A1 (en) * 2004-02-20 2005-09-01 Schnell John W. Adjustable exhaust assembly for pneumatic fasteners
US20050189392A1 (en) * 2004-02-20 2005-09-01 Schnell John W. Oil free head valve for pneumatic nailers and staplers
US7278561B2 (en) 2004-02-20 2007-10-09 Black & Decker Inc. Oil free head valve for pneumatic nailers and staplers
US7316341B2 (en) 2004-02-20 2008-01-08 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fasteners
US7458492B2 (en) 2004-02-20 2008-12-02 Black & Decker Inc. Dual mode pneumatic fastener actuation mechanism
US20080197166A1 (en) * 2004-02-20 2008-08-21 Black & Decker Inc. Adjustable Exhaust Assembly For Pneumatic Fasteners
US20050189394A1 (en) * 2004-02-24 2005-09-01 Terrell Timothy E. Pneumatic fastener
US20050189396A1 (en) * 2004-02-24 2005-09-01 Leasure Jeremy D. Pneumatic fastener
US7988025B2 (en) 2004-02-24 2011-08-02 Black & Decker Inc. Pneumatic fastener
US20050189395A1 (en) * 2004-02-24 2005-09-01 Terrell Timothy E. Pneumatic fastener
US20090218383A1 (en) * 2006-06-01 2009-09-03 Ricardo Segura Control Valve Assembly for Fastener-Driving Tool
US8523037B2 (en) * 2006-06-01 2013-09-03 Illinois Tool Works Inc. Control valve assembly for fastener-driving tool
WO2009123533A1 (en) * 2008-03-31 2009-10-08 Atlas Copco Construction Tools Ab Percussion tool
US20110005786A1 (en) * 2008-03-31 2011-01-13 Oestensson Olof Percussion tool
US8955616B2 (en) 2008-03-31 2015-02-17 Construction Tools Pc Ab Percussion tool

Also Published As

Publication number Publication date
DE2035452A1 (de) 1971-02-18
CA961201A (en) 1975-01-21
FR2051005A5 (enrdf_load_stackoverflow) 1971-04-02
GB1267141A (enrdf_load_stackoverflow) 1972-03-15
DE2035452B2 (de) 1979-02-22
DE2035452C3 (de) 1979-10-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BANKERS TRUST COMPANY, A NY BANKING CORPORATION

Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004172/0159

Effective date: 19830819

AS Assignment

Owner name: VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING M

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SWINGLINE INC.;REEL/FRAME:004196/0645

Effective date: 19830819

AS Assignment

Owner name: BANKERS TRUST COMPANY A NEW YORK BANKING CORP

Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004404/0886

Effective date: 19830819