US3796270A - Release stop means for pneumatic nail driving or stapling device - Google Patents

Release stop means for pneumatic nail driving or stapling device Download PDF

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Publication number
US3796270A
US3796270A US00266491A US3796270DA US3796270A US 3796270 A US3796270 A US 3796270A US 00266491 A US00266491 A US 00266491A US 3796270D A US3796270D A US 3796270DA US 3796270 A US3796270 A US 3796270A
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United States
Prior art keywords
release
air chamber
auxiliary member
valve stem
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
US00266491A
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English (en)
Inventor
W Lange
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.)
BUKAMA GmbH
Original Assignee
BUKAMA GmbH
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 BUKAMA GmbH filed Critical BUKAMA GmbH
Application granted granted Critical
Publication of US3796270A publication Critical patent/US3796270A/en
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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
    • B25C1/043—Trigger valve and trigger mechanism

Definitions

  • a release block or stop means for use with a pneumatically operated nail driving or stapling device comprises a slidable actuating member or slip-on part slidable in the direction it is slipped or installed on the device. The part protrudes from its position of rest beyond the mouthpiece of the device. Placing both the slip-on part and a release or tripping lever in operating position actuates a valve tappet mounted above an auxiliary member for causing a working stroke of the pneumatically operated nail driving device.
  • Said auxiliary member is non-slidable, but has bushings slidably mounted thereon, the first of said bushings being coupled to the release lever and the second of said bushings being coupled to the slip-on part.
  • This invention relates to a release block or stop means used with a pneumatically operated nail driving or stapling device having a slip-on part which is slidable in its slip-on direction and protrudes in its position of rest beyond the mouthpiece of the device.
  • the slip-on part in conjunction with a release or tripping lever when both are placed in an operating position actuates with an auxiliary member a valve tappet co-axially aligned to initiate a working stroke of the pneumatically operated nail driving device.
  • the valve tappet defines with the auxiliary member an air space communicating with a pressurized air reservoir.
  • the basic objective of the invention is to provide a release stop or blocking device such that the aforementioned disadvantages are avoided and that permits subsequent installation on a pneumatic nail driving device whereby a rapid mode of operation is achieved.
  • the release stop according to the invention comprises the improvements of an auxiliary member located in a portion of a housing or case bore so as to be non-slidable therein, the bore also a valve tappet controlling the working stroke of the pneumatic nail driving device. No special superposed valve is necessary and simplification of the structure is obtained.
  • the improvement permits subsequent installation to be easily performed without any difficulty in pneumatic nail driving devices having a valve tappet controlling the working stroke thereof.
  • the auxiliary member is provided with two sleeves or bushings slidably mounted independently of each other, the first bushing being coupled to the release lever and the second bushing being coupled to the slip-on part.
  • the air chamber above the auxiliary member is in constant communication via a channel in the valve tappet with the pressured air reservoir.
  • the air chamber can be connected via channels in the auxiliary member to a control chamber located in the first bushing and to a venting channel provided in the second bushing.
  • the air chamber can be vented and the valve tappet may reach its downward position for initiating the working stroke of the pneumatic nail driving device only when both the release lever and the slip-on part are in operating position. In all other positions as well as when not in operation, pressure in the air chamber due to its permanent communication with the pressurized air reservoir holds the valve tappet in its upper position to prevent a working stroke.
  • valve tappet In order to assure that the valve tappet is raised immediately after having reached its lower position preparatory to the next working stroke and to block the supply of pressured air to the working cylinder for the last working stroke, it is recommended to connect the air. chamber between the valve tappet and the auxiliary member through a throttling channel to the pressurized air reservoir so as to provide a definite time lapse before sufficient pressure is built up in said air chamber to raise the valve tappet.
  • the throttling means is most suitably provided with a nozzle, preferably of the changeable type, such that the time to raise the valve tappet may be adjusted to different operating conditions of the nail driving device.
  • FIG. 1 is a partial sectional view, of a nail driving device when not in use
  • FIG. 2 is a view of FIG. 1 with the slip-on part and the release lever in the non-operating position;
  • FIG. 3 is a view similar to FIG. 2, but with the slip-on part in non-operating position and the release lever in operating position;
  • FIG. 4 is a view similar FIG. 2, but with the slip-on part in operating position and the release lever in nonoperating position, and
  • FIG. 5 is view similar to FIG. 2, but with the slip-on part and the release lever in operating positions for, i.e. in the position actuating a working stroke of the nail driving device.
  • FIG. I a nail driving device used for driving nails or staples into a work piece (not illustrated).
  • the device has a body or housing 1 made of a material such as light metal and comprises a handle 2 enclosing a reservoir 3 for pressurized air connected to a source of compressed air (not shown).
  • a working cylinder 4 in which is slidably mounted a piston 5.
  • the piston 5 drives a plunger or rod 6 which separates, during the working stroke, a staple from a bar of staples introduced into magazine 7 and which drives said staple through an ejector channel 9 located in a mouthpiece 8 into a work piece (not shown).
  • the working stroke of the pneumatically operated nail driver or stapler is actuated by a valve stem or tappet l0 traversing the air reservoir 3 and carrying a control valve 11 on the upper portion thereon.
  • the valve 11 controls, in a manner will known, the piston-type intake valve 12 for the working cylinder 4.
  • the intake valve 12 In the upper position of the valve 11, shown in FIG. 1, the intake valve 12 is closed and the piston 5 is in its initial position abutting the housing cover 13.
  • the valve tappet 10 is provided on its lower end with an enlargement 14 having the cylindrical end 15.
  • the end 15 is received in a bore 16 of the housing, and the bore' 16 also receives the upper end of an auxiliary member 17 non-slidably mounted therein.
  • the bore 16 of the housing forms an air chamber or space 18 permanently communicating, via a radial bore 19 (FIG. 1,), as well as the axial bore 20 of the valve tappet and- /or its enlargement 14 and a nozzle 21 mounted in the cylindrical end portion 15, with the pressurized air reservoir 3.
  • the valve tappet 10 is held in the upper position'shown in FIG. I so that the intake valve 12 of the working cylinder 4 is kept closed.
  • the lower portion 22 of the auxiliary member 17 is received in the bore 16 and is non-slidable therein.
  • the member 17 is provided with a sleeve or bushing 23 slidably mounted thereon.
  • the bushing 23 has on its upper end an annular groove 24 which is engaged by the release lever 26 which is pivotablymounted on a horizontal stud 25.
  • Below the bushing 23 there is mounted a second sleeve or bushing 27 independent thereof and slidable on the lower cylindrical part 22 of the auxiliary member 17.
  • This bushing 27 is provided with an annular groove 28 engaged by a structural member 29, the lower end 30 of which engages an oblong hole 31 at the upper end of the actuating member or slip-on part 32.
  • the other end of the slip-on part 32 is bent at a right angle and carries a rest 33 acted on by a biasing spring 34 and is connected to a downwardly projecting foot 35.
  • the lower end of the cylindrical part 22 engages a hole 36 provided on the upper side of the magazine 7.
  • the upper portion of the auxiliary member 17 is fixedly mounted with respect to the housing 1 by means of a retainer ring (FIG. 2).
  • the upper portion of the auxiliary member 17 is provided with a turned groove 38 in open communication with the air space 18 via a radial bore 39 and an axial bore 40.
  • the groove 38 is sealed with respect to bushing 23 by means of an upper O-ring 41 and a lower O-ring 42.
  • the bushing 23 is provided underneath O-ring 42 with an annular groove 43 which is sealed at its top by O-ring 42 and at its bottom by O- ring 44.
  • the lower auxiliary member part 22 is provided with :1 turned groove 45 communicating, via both radial bores 46 and 47 and an axial bore 48 interconnecting the latter bores, with the annular groove 43.
  • the turned groove 45 is sealed off by O-ring 49 at the top and by O-ring 50 at the bottom, the lower end of said bushing being provided with radial venting bores I.
  • the mode of operation is as follows:
  • valve tappet As long as the air space 18 above auxiliary member 17 is exposed via channels 19, 20 and the nozzle 21 to the pressurized air in the reservoir 3 the valve tappet is held in the upper position shown in FIG. ll, wherein the control valve 11 holds the intake valve 12 in closed position and piston 5 remains in its upper initial position. In order to open the intake valve 12 it is necessary to vent the air space 18 so that the stapling or nail driving device can perform a working stroke.
  • the air space 18 can be vented only' when both the bushings 23 and 27 slidably mounted on the lower part 22 of the auxiliary member 17 are moved to the proper position by movement of the release lever 26 and the slip-on part 32.
  • the pneumatic control system used in accordance with the invention provides a number of advantages as opposed to the prior art mechanical device and may be subsequently installed, without any difficulties, on existing devices to equip them with a reliable stop means.
  • a release stop means for a pneumatically operated stapling device having a housing forming a pressurized air reservoir, a piston and cylinder contained in the housing, a cylinder valve at an end of the cylinder, a mouthpiece through which staples are ejected, an actuating member extending in a rest position beyond the mouthpiece and being movable into operating position by being pressed against a work piece, and manual release lever means located on said housing;
  • said release stop means comprising a control valve stem slidably located in an opening in said housing for pneumatically operating the cylinder valve, an auxiliary member fixedly located in said opening'below said valve stem, an air chamber formed between said auxiliary member and said valve stem, first and second sleeves slidably mounted on said auxiliary member, said first sleeve being connected to the release lever means and said second sleeve being connected to the actuating member, said first sleeve having a control space, said second sleeve having vent channel means, first passage means in said valve
  • a release stop means for a pneumatically operated stapling device having a housing containing a pressurized air reservoir, a piston and cylinder, an actuating member extending below said device and being movable into operating position by being pressed against a work piece, and manual release lever means; said release stop means comprising a control valve stem'slidable in said housing for initiating a working stroke, an
  • auxiliary member fixedly located in said housing and forming an air chamber with said valve stem, a pair of sleeves slidably mounted on said auxiliary member, said first sleeve being connected to the release lever means and said second sleeve being connected to the actuating member,-one of said sleeves having a control space, and the other of said sleeves having vent means, first passage means in said device connecting said air chamber to said pressurized air reservoir, and second passage means in said device for connecting said air chamber to said control space and for connecting said control space to said vent means upon operation of said release lever means and actuating member, thereby venting said air chamber to permit movement of said valve stem to initiate a working stroke.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00266491A 1971-06-26 1972-06-26 Release stop means for pneumatic nail driving or stapling device Expired - Lifetime US3796270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712131849 DE2131849B2 (de) 1971-06-26 1971-06-26 Ausloesesperre an einem druckluftnagler

Publications (1)

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US3796270A true US3796270A (en) 1974-03-12

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US00266491A Expired - Lifetime US3796270A (en) 1971-06-26 1972-06-26 Release stop means for pneumatic nail driving or stapling device

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US (1) US3796270A (enExample)
DE (1) DE2131849B2 (enExample)
GB (1) GB1373058A (enExample)
IT (1) IT959881B (enExample)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4534500A (en) * 1981-12-28 1985-08-13 Hilti Aktiengesellschaft Setting device with a driving piston propelled by high pressure gases
US20050072585A1 (en) * 2003-10-01 2005-04-07 Takeshi Kamo Pneumatically operated screw driver
US20090057367A1 (en) * 2007-08-31 2009-03-05 Illinois Tool Works, Inc. Pneumatic tool actuation device
US20090072005A1 (en) * 2007-08-31 2009-03-19 Illinois Tool Works Inc. Enhanced pneumatic tool actuation device
US20100012700A1 (en) * 2008-07-17 2010-01-21 Stanley Fastening Systems, Lp Fastener driving device with mode selector and trigger interlock
US20100038398A1 (en) * 2008-08-17 2010-02-18 Chia-Sheng Liang Linkage Mechanism for Control Valve in Pneumatic Nail Guns
US20100301091A1 (en) * 2009-06-01 2010-12-02 Chia-Sheng Liang Linkage Mechanism between Trigger Valve and Control Valve in Pneumatic Nail Guns
US20100308098A1 (en) * 2009-06-08 2010-12-09 Illinois Tool Works, Inc. Fastening tool with blind guide work contact tip
US20100327040A1 (en) * 2009-06-29 2010-12-30 Max Co., Ltd. Driving tool and bumper of driving tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718942C3 (de) * 1977-04-28 1980-02-14 Senco Products, Inc., Cincinnati, Ohio (V.St.A.) Auslösesicherung an einem Druckluftnagler
DE3014803C2 (de) * 1980-04-17 1985-07-25 Joh. Friedrich Behrens AG, 2070 Ahrensburg Druckluftnagler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854953A (en) * 1955-10-17 1958-10-07 Lloyd M Osborne Fluid-actuated fastener-applying machine
US3677456A (en) * 1970-07-15 1972-07-18 Fastener Corp Safety for fastener driving tool
US3685396A (en) * 1970-06-15 1972-08-22 Fastener Corp Fastener driving tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854953A (en) * 1955-10-17 1958-10-07 Lloyd M Osborne Fluid-actuated fastener-applying machine
US3685396A (en) * 1970-06-15 1972-08-22 Fastener Corp Fastener driving tool
US3677456A (en) * 1970-07-15 1972-07-18 Fastener Corp Safety for fastener driving tool

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4534500A (en) * 1981-12-28 1985-08-13 Hilti Aktiengesellschaft Setting device with a driving piston propelled by high pressure gases
US20050072585A1 (en) * 2003-10-01 2005-04-07 Takeshi Kamo Pneumatically operated screw driver
US7165478B2 (en) * 2003-10-01 2007-01-23 Hitachi Koki Co., Ltd. Pneumatically operated screw driver
US20090057367A1 (en) * 2007-08-31 2009-03-05 Illinois Tool Works, Inc. Pneumatic tool actuation device
US20090072005A1 (en) * 2007-08-31 2009-03-19 Illinois Tool Works Inc. Enhanced pneumatic tool actuation device
US7690546B2 (en) * 2007-08-31 2010-04-06 Illinois Tool Works Inc. Pneumatic tool actuation device
US8881963B2 (en) 2007-08-31 2014-11-11 Illinois Tool Works Inc. Enhanced pneumatic tool actuation device
US8800835B2 (en) * 2008-07-17 2014-08-12 Stanley Fastening Systems, Lp Fastener driving device with mode selector and trigger interlock
US20100012700A1 (en) * 2008-07-17 2010-01-21 Stanley Fastening Systems, Lp Fastener driving device with mode selector and trigger interlock
US20100038398A1 (en) * 2008-08-17 2010-02-18 Chia-Sheng Liang Linkage Mechanism for Control Valve in Pneumatic Nail Guns
US20100301091A1 (en) * 2009-06-01 2010-12-02 Chia-Sheng Liang Linkage Mechanism between Trigger Valve and Control Valve in Pneumatic Nail Guns
US8387846B2 (en) 2009-06-08 2013-03-05 Illinois Tool Works Inc Fastening tool with blind guide work contact tip
US8627991B2 (en) 2009-06-08 2014-01-14 Illinois Tool Works Inc. Fastening tool with blind guide work contact tip
US20100308098A1 (en) * 2009-06-08 2010-12-09 Illinois Tool Works, Inc. Fastening tool with blind guide work contact tip
US8544561B2 (en) * 2009-06-29 2013-10-01 Max Co., Ltd. Driving tool and bumper of driving tool
US20100327040A1 (en) * 2009-06-29 2010-12-30 Max Co., Ltd. Driving tool and bumper of driving tool

Also Published As

Publication number Publication date
DE2131849B2 (de) 1973-08-23
DE2131849C3 (enExample) 1974-03-28
DE2131849A1 (de) 1973-01-25
GB1373058A (en) 1974-11-06
IT959881B (it) 1973-11-10

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