US3657968A - Pneumatic stapling device - Google Patents

Pneumatic stapling device Download PDF

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Publication number
US3657968A
US3657968A US10929A US3657968DA US3657968A US 3657968 A US3657968 A US 3657968A US 10929 A US10929 A US 10929A US 3657968D A US3657968D A US 3657968DA US 3657968 A US3657968 A US 3657968A
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United States
Prior art keywords
cylinder
air
storage chamber
piston
working
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Expired - Lifetime
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US10929A
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English (en)
Inventor
Wilfried Lange
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Individual
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Individual
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    • 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
    • B25C1/042—Main valve and main cylinder

Definitions

  • a pneumatic stapler of the type having a working cylinder communicating with a surrounding air chamber by means of ports in the cylinder wall is provided with an annular valve means movable on the external surface of the cylinder wall.
  • said valve means closes the ports in the cylinder wall and opens an outlet passage for venting the air from the cylinder displaced by the piston and from the air chamber to the atmosphere.
  • said valve means opens the ports in the cylinder wall and connects the air chamber with a space beneath the piston and closes the outlet passage, whereby the piston is exposed to air pressure from the chamber for returning the piston to its initial position.
  • the present invention relates to a pneumatic stapling device and especially to a portable device operable by compressed air and serving to drive fastening means such as staples and the like into a work piece by means of a driver which is actuated by a piston operated by compressed air, which piston is returned to its initial position by pneumatic operation.
  • the prior art devices providing for a pneumatic return of the piston to its initial position have an additional storage chamber receiving the air which is necessary for moving the piston to its initial or retracted position.
  • Said storage chamber encloses the working cylinder and communicates with said cylinder by means of ports arranged in its side wall.
  • a first group of said ports is provided for admitting compressed air to the storage chamber from the interior of the working cylinder toward the end of the driving stroke of the piston.
  • Practical experience has shown that after each working stroke of the piston more compressed air is passed from the interior of the cylinder into the storage chamber than is needed for returning the piston. If the piston performs at very high speeds, the air displaced by the piston is pumped into the storage chamber whereby a counterpressure is produced which reduces the efficiency ofthe stapling device.
  • Another object of the invention is the provision of a pneumatic stapler with the interior of its working cylinder beneath the piston vented during the working stroke of said piston.
  • a further object of the invention is to provide a portable stapler with a piston pneumatically returned to its initial position, and the storage chamber of which receives no increase of air pressure during a rapid sequence of working strokes.
  • FIG. 1 is a fragmentary sectional view of a pneumatic stapler embodying this invention with the piston in its initial position
  • FIG. 2 is a similar view with the piston in its terminal position after completion of its working stroke.
  • the invention comprises a pneumatic valve means for directly exhausting the storage chamber and the interior of the working cylinder beneath the piston to the atmosphere during its working stroke.
  • an annular slide valve is provided with pressure faces which are of different size and are directed opposite one another.
  • Said slide valve comprises a check valve for the admission of compressed air.
  • Said annular slide valve encloses the lower end of the working cylinder and has transverse ports for venting the air contained in the storage chamber. These transverse ports together with venting openings of the working cylinder open in an annular passage formed between said annular slide valve and the working cylinder.
  • Said cylinder communicates with venting openings leading to the atmosphere.
  • the pressure face of the annular slide valve effecting its descending motion is greater than the pressure face which effects its upward motion. The face effecting the upward motion is always acted on by compressed air.
  • the provision of the pneumatic valve means according to the invention provides during each working stroke of the piston an intense venting of the storage chamber and of the interior of the working stroke beneath the piston.
  • the staplers embodying the invention are especially adapted for a rapid sequence of working strokes as is the case with automatic devices.
  • a body casing l of a portable pneumatic stapler encloses a working cylinder 2 with a side wall and a bottom end wall having a. storage chamber 3 surrounding the cylinder.
  • a piston 4 is reciprocable and is secured to a driver 5.
  • transverse ports 14 and 18 are arranged, which connect the cylinder with the atmosphere and the storage chamber 3, respectively.
  • a step shaped annular slide valve member 6 surrounds the lower portion of the working cylinder which is provided with said transverse ports 14 adjacent the end of the cylinder and ports 18 intermediate the ends of the cylinder.
  • the slide valve member 6 has two opposed pressure faces 7 and8. Pressure face 8 is greater than the other pressure face 7.
  • First passage means including trans verse bores 10 in the slide valve member 6 communicate the interior of the cylinder with the storage chamber 3 by means of the intermediate ports 18 in the side wall of the cylinder 2.
  • the slide valve member 6 is provided with a second passage means including transverse ports 11 which open into an annular chamber 12 which communicates with ports 14 on the lower end of the cylinder side wall.
  • the annular chamber 12 communicates with outletpassages 13 adjacent the bottom wall of the body casing and connects said annular chamber 12 directly with the atmosphere when the slide valve 6 is in the position shown in FIG. 1.
  • the upper pressure face 8 is adjacent a shoulder 15 of the side wall of the working cylinder, the shoulder 15 limiting the travel of the valve 6.
  • the lower face 7 of the slide valve member 6 is permanently exposed to the pressure of the compressed air contained in an air reservoir :19 which communicates by means of a passage 16 with the space7 beneath the pressure face 7.
  • the annular slide valve member 6 by sealing rings 20 is closed off against the external surface of the working cylinder 2.
  • An elastic ring 9 inserted in an annular recess 17 encircling the bores 10 serves as a check valve for the slide valve member 6 to permit air to pass only into the chamber 3.
  • the air reservoir 19 communicates by means of a control valve 21 manually actuated by a trigger level 22 with a firing valve 23, which in its initial position as shown in FIG. 1 is exposed to the pressure of the air contained in the air reservoir 19 via control valve 21.
  • control valve 21 When control valve 21 is lifted to its upper terminal position by means of trigger level 22, the air acting on the firing valve 23 can escape to the atmosphere via the venting openings 24 and 25, as is illustrated in FIG. 2.
  • the air under pressure contained in reservoir 19 moves the firing valve 23 upward, enters the working space 2' of the cylinder and acts upon the upper face of the piston 4 and moves it in its working direction. Beneath piston 4 the interior of the working cylinder via the ports 14, the annular chamber 12 and the openings 13 is completely vented.
  • the storage chamber 3 at this moment is also connected to the chamber 12 by the ports 11 and contains no air under pressure, so that the annular slide valve member 6 by means of the lower pressure face 7 is held in its upper position.
  • the upper frontal face 26 of the annular slide valve member 6 (see FIG. 2) is so dimensioned that the air contained in the storage chamber 3 can hold the valve member 6 in its lower terminal position till the piston has reached its upper terminal position.
  • the present invention is of considerable advantage for pneumatic equipment of all kinds, and in particular for portable pneumatic percussion devices having a rapid series of working strokes. This is of particular importance where the percussion device is concerned for driving in staples, nails and other fasteners, so widely used in mass production.
  • the invention is also of importance for pliers and packing devices for stapling the lids of cardboard boxes.
  • a pneumatic stapling device including a body portion containing an air reservoir, a cylinder having a side wall and a wall at one end thereof, an air storage chamber surrounding said cylinder, a piston reciprocable in a working stroke and a return stroke in said cylinder and separating said cylinder into a working space on one side of said piston and a return space on the other side of said piston, and outlet passage means for venting said return space and said air storage chamber during said working stroke
  • said cylinder having valve means at the other end thereof for admitting compressed air from said air reservoir into said working space of said cylinder for moving said piston in said working stroke
  • said cylinder having first port means in said side wall of said cylinder to connect said working space to said air storage chamber to fill said air storage chamber and second port means in said cylinder to connect said air storage chamber to said return space for moving said piston in said return stroke and for venting said return space; the improvement comprising a pneumatic valve for exhausting said return space of said cylinder and said air storage chamber through said outlet passage means, said pneumatic valve
  • said check valve comprises an elastic ring and said first passage means includes at east one transverse bore in said pneumatic valve, said elastic ring covering said bore.
  • said first passage means further includes an annular recess on said pneumatic valve, said elastic ring being located in said recess.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US10929A 1969-02-13 1970-02-12 Pneumatic stapling device Expired - Lifetime US3657968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691907069 DE1907069A1 (de) 1969-02-13 1969-02-13 Mit Druckluft betriebenes Schlaggeraet,insbesondere zum Eintreiben von Befestigungsmitteln

Publications (1)

Publication Number Publication Date
US3657968A true US3657968A (en) 1972-04-25

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US10929A Expired - Lifetime US3657968A (en) 1969-02-13 1970-02-12 Pneumatic stapling device

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US (1) US3657968A (de)
DE (1) DE1907069A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030655A (en) * 1971-12-22 1977-06-21 Senco Products, Inc. Improved fastener applying device
US5207143A (en) * 1991-05-16 1993-05-04 Umberto Monacelli Pneumatic fastener driving apparatus with an improved valve
US20050184120A1 (en) * 2004-02-20 2005-08-25 Terrell Timothy E. Dual mode pneumatic fastener actuation mechanism
US20050189394A1 (en) * 2004-02-24 2005-09-01 Terrell Timothy E. Pneumatic fastener
US20050189395A1 (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
US7290691B1 (en) * 2006-08-30 2007-11-06 De Poan Pheumatic Corp. Pneumatic nail gun
US20080272326A1 (en) * 2007-05-02 2008-11-06 Buck William C Driving tool and head valve assembly for a driving tool
JPWO2016190133A1 (ja) * 2015-05-27 2018-03-08 日立工機株式会社 打込機
EP3670089A1 (de) * 2018-12-18 2020-06-24 Tia Spolka z .o.o. Pneumatischer tacker

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523646A (en) * 1980-06-02 1985-06-18 Duo-Fast Corporation Fastener driving tool
DE3227855A1 (de) * 1982-07-26 1984-01-26 Hilti AG, 9494 Schaan Druckluftnagler
DE3540953A1 (de) * 1985-11-19 1987-05-21 Hilti Ag Pulverkraftbetriebenes bolzensetzgeraet
TWI321085B (en) * 2006-10-24 2010-03-01 De Poan Pneumatic Corp Air actuated nail driver
TWI317679B (en) * 2006-10-24 2009-12-01 De Poan Pneumatic Corp Air actuated nail driver

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396636A (en) * 1967-01-28 1968-08-13 Behrens Friedrich Joh Compressed air-operated drive-in apparatus to drive-in fasteners, for instance, nails, staples or the like
US3479926A (en) * 1965-12-29 1969-11-25 Gaston E Marbaix Ltd Pneumatic devices for driving fasteners or like purposes
US3512454A (en) * 1968-01-02 1970-05-19 Swingline Inc Air return mechanism for a fastener driving machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479926A (en) * 1965-12-29 1969-11-25 Gaston E Marbaix Ltd Pneumatic devices for driving fasteners or like purposes
US3396636A (en) * 1967-01-28 1968-08-13 Behrens Friedrich Joh Compressed air-operated drive-in apparatus to drive-in fasteners, for instance, nails, staples or the like
US3512454A (en) * 1968-01-02 1970-05-19 Swingline Inc Air return mechanism for a fastener driving machine

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030655A (en) * 1971-12-22 1977-06-21 Senco Products, Inc. Improved fastener applying device
US5207143A (en) * 1991-05-16 1993-05-04 Umberto Monacelli Pneumatic fastener driving apparatus with an improved valve
US20060273132A1 (en) * 2003-12-31 2006-12-07 Leasure Jeremy D Pneumatic fastener
US20050189392A1 (en) * 2004-02-20 2005-09-01 Schnell John W. Oil free head valve for pneumatic nailers and staplers
US8556149B2 (en) 2004-02-20 2013-10-15 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fastener
US20080197166A1 (en) * 2004-02-20 2008-08-21 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
US7484649B2 (en) 2004-02-20 2009-02-03 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fasteners
US7137540B2 (en) 2004-02-20 2006-11-21 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
US20070034660A1 (en) * 2004-02-20 2007-02-15 Black & Decker Inc. Dual mode pneumatic fastener actuation mechanism
US7278561B2 (en) 2004-02-20 2007-10-09 Black & Decker Inc. Oil free head valve for pneumatic nailers and staplers
US7458492B2 (en) 2004-02-20 2008-12-02 Black & Decker Inc. Dual mode pneumatic fastener actuation mechanism
US7316341B2 (en) 2004-02-20 2008-01-08 Black & Decker Inc. Adjustable exhaust assembly for pneumatic fasteners
US20050189395A1 (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
US20050189394A1 (en) * 2004-02-24 2005-09-01 Terrell Timothy E. Pneumatic fastener
US7290691B1 (en) * 2006-08-30 2007-11-06 De Poan Pheumatic Corp. Pneumatic nail gun
US20080272326A1 (en) * 2007-05-02 2008-11-06 Buck William C Driving tool and head valve assembly for a driving tool
JPWO2016190133A1 (ja) * 2015-05-27 2018-03-08 日立工機株式会社 打込機
EP3670089A1 (de) * 2018-12-18 2020-06-24 Tia Spolka z .o.o. Pneumatischer tacker

Also Published As

Publication number Publication date
DE1907069A1 (de) 1970-10-22

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