US3563439A - Powder actuated tool - Google Patents

Powder actuated tool Download PDF

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Publication number
US3563439A
US3563439A US737900A US3563439DA US3563439A US 3563439 A US3563439 A US 3563439A US 737900 A US737900 A US 737900A US 3563439D A US3563439D A US 3563439DA US 3563439 A US3563439 A US 3563439A
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US
United States
Prior art keywords
barrel
piston
breech
housing
breechblock
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
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US737900A
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English (en)
Inventor
Raymond V Pomeroy
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Omark Industries Inc
Thomas and Betts Holdings Inc
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Omark Industries Inc
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Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Assigned to FL INDUSTRIES, INC., A CORP. OF N.J. reassignment FL INDUSTRIES, INC., A CORP. OF N.J. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ITT CORPORATION, 320 PARK AVENUE, NEW YORK, NY 10022, A CORP. OF DE.
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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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated
    • 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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • B25C1/146—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil operated by a hammer blow
    • 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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers

Definitions

  • a piston retractor is slidably [51] Int. Cl B25c 1/14 carried on the barrel and includes a member extending [50] Field ofSearch 227/8, 9, l0 through a slot in the barrel for engaging the head of the piston used for moving of a piston into a firing position.
  • the barrel [56] References Cited may be pivotally returned to firing position only after the UNITED STATES PATENTS piston retractor has been moved forwardly and out of the way 3,022,513 2/1962 Temple et al. 227/8 ofpiston movement in the subsequent firing of the tool.
  • Such a tool is cocked by pressure of the muzzle against a workpiece or wall, resulting in movement of the tools breechblock into a firing position.
  • a cartridge may then be fired to force the captive piston through the barrel and drive the fastener device.
  • the barrel and the breechblock are conventionally separated so that a new cartridge or power load may be inserted, and the captive piston must be returned to its firing position.
  • Various constructions have been employed hereto fore to facilitate the loading and piston return operations.
  • the barrel may be rotated laterally to the side of the tool facilitating the removal of the captive piston to a firing position and insertion of a new load.
  • the barrel may be movable longitudinally forward of the tool for retraction of the piston and reloading. In the case of these constructions and other similar arrangements, the tool mechanism is apt to be quite complex and/or somewhat unbalanced.
  • a powder actuated tool comprises a housing including a rearward breech portion and a forward barrel portion.
  • the tool's barrel is cradled by the barrel portion when the barrel is in a first position in substantial alignment with the tool's breechblock.
  • the barrel is pivotally engaged by the barrel portion at a forward location so that the breech end of the barrel can be pivotally upraised away from the breechblock into a loading position.
  • the tool further includes a piston retractor slidably carried by the barrel, which retractor includes a member for engaging the piston, and a handle portion which is manually engageable for moving the piston retractor. The piston may be moved thereby to a firing position toward the breech end of the barrel.
  • the retractor and housing construction prevent the barrel from being pivotable back into firing position in alignment with the breechblock until such retractor is moved forwardly out of the way of the captive piston, allowing firing of the tool.
  • the tool is compact, and movement of component parts thereof is reduced to a minimum.
  • FIG. I is a longitudinal cross section of a powder actuated tool according to the present invention.
  • FIG. 2 is a lateral cross section of the FIG. I tool taken at 2-2 in FIG. I;
  • FIG. 3 is a lateral view of the cross section of the FIG. It tool taken at 3-3 in FIG. 1;
  • FIG. 4 is a top view partially broken away in horizontal cross section of the FIG. 1 tool.
  • FIG. 5 is a side view of the FIG. 1 tool in a loading position thereof.
  • an explosively operated tool includes a housing generally indicated at 10 including a forward portion 12 which may be designated as a barrel portion and a rearward portion 13 which may be designated as a breech portion.
  • Rearward portion 13 includes a handle portion or grip 118.
  • Barrel portion 12 is semicircular in cross section and cradles barrel 14 in a first position thereof wherein the barrel is aligned with the breechblock 16 positioned in the breech portion of the housing.
  • Barrel M extends from muzzle 15 rearwardly to a power plug 118 received in the breech end of the barrel.
  • the barrel is provided with an inner bore 20 within which a captive piston 22 is slidable, such piston having an enlarged piston head 24 which slides within inner bore 20 and a ram or plunger 26 adapted to contact and drive the head of a fastener device (not shown) into a workpiece at the left end of muzzle l5.
  • Enlarged head 24 of the captive piston includes a rearward head portion 25 and a forward head portion 27 slidably engaged with the inside of the barrel bore. Head portion 25 is suitably provided with a piston ring or seal 32 therearound to prevent excessive escape of gas past head 24.
  • Power plug 18 is slidably positioned in the breech end of barrel bore 20 wherein the bore 20 is substantially smooth.
  • the outer circumference of power plug 18 is grooved and provided with a spring retainer 34 which releasably secures the power plug at the end of the barrel.
  • Power plug 18 includes a chamber 36 for the receiving a power charge or cartridge.
  • Breechblock 16 is longitudinally slidable within breech portion 13 of the housing and is recessed at 38 to receive power plug 18 in the firing positionthereof.
  • Breechblock 16 slidably carries firing pin holder 40 in turn carrying a tapered firing pin 42.
  • the firing pin holder is normally held in a retracted position relative to breechblock 16 by sear 44 which is urged at this time by spring 46 to a location adjacent an edge 48 of the breechblock.
  • firing pin spring 56 When breechblock I6 is in such cocked position, firing pin spring 56 is compressed, and upward movement of the sear 44 causes tapered firing pin 42 to be driven by spring 56 into tapered bore 58 in the breechblock 16.
  • the firing pin 42 is adapted to project through tapered bore 58 and strike a rim fire power load or the like positioned in chamber 36.
  • trigger 60 To fire the tool, trigger 60 is compressed against spring 62 moving trigger bar 54 upward into contact with sear 44, providing the latter is in cocked position.
  • Trigger bar 54 is carried in a vertical slot in the trigger and is pivoted at 57, being maintained in alignment with the trigger by internal spring 59.
  • trigger bar 54 This mechanism permits the trigger bar 54 to turn in a clockwise manner without damage in the event that the tool is cocked with the trigger compressed. In this event, trigger bar 54 will merely rotate in a clockwise sense as the side of sear 44 contacts the same. The tool may then not be fired until the trigger is released and compressed again.
  • the barrel portion 12 of the housing is substantially channel-shaped and open upwardly where it receives or cradles cylindrical barrel 14 in the first position of the barrel in alignment with breechblock 16.
  • the barrel 14 is pivotally engaged by the barrel portion 12 of the housing at a location towards the muzzle end of the barrel so that the breech end of the barrel can be upraised away from the breechblock into loading position.
  • a substantially horizontal pin member 64 is carried by the barrel portion of the housing at the aforementioned location toward the muzzle end of the barrel, pin member 64 being positioned at the lower side of the barrel and extending transversely of the tool.
  • a pinmatching longitudinal and transverse slot 66 is located on the underside of barrel 14 through which pin member 64 extends.
  • Slot 66 has longitudinal length along the barrel permitting longitudinal sliding movement of the barrel for full engagement of power plug 18 within recess 38 of breechblock 16, as well as movement of the breechblock 16 within breech portion 13 of the housing into the aforementioned cocked position.
  • dimension X substantially corresponds at least to the depth of penetration of power plug 18 within recess 38
  • dimension Y corresponds to the movement of breechblock 16 further to the right to the cocked position wherein sear 44 is above trigger bar 54.
  • barrel 14 when moved to the left by the distance X, will clear power plug 18 from breechblock l6, and when moved to the right by the distance Y, will compress breechblock 16 against the bias of springs 50 and 52 until sear 44 is over trigger bar 54.
  • the barrel portion 12 is provided with an arched barrel retaining member 68 proximate and above the location of pin member 64.
  • the arched barrel retaining member 68 has an inner surface 70 semicircular in cross section which substantially matches the cylindrical barrel 14, but which is angled upwardly and to the right in FIG. 1. It will be apparent that barrel 14 may be moved to the left by a distance X whereby power plug 18 clears breechblock l6, and then the breech end of the barrel may be moved upwardly into a loading position, with the barrel pivoting substantially around pin member 64.
  • arched barred retaining member 68 limits the upward movement of the barrel, and when barrel 14 is upraised as far as it will go, the inner surface 70 of the retaining member substantially matches or cradles the upper side of barrel 14. Retaining member 68 prevents the barrel from moving away from pin member 64 by a distance as great as the diameter of pin member 64 so that the barrel pivots substantially around pin member 64.
  • the barrel 14 is provided with a longitudinal slot 72 on the underside thereof or the side adjacent barrel portion 12 of the housing.
  • This longitudinal slot does not extend the full length of the barrel, but stops short of the breech and muzzle ends thereof as illustrated.
  • ring 32 on piston head 24 is located a predetermined distance toward power plug 18 from the breech end of slot 72 in the firing position of the piston.
  • the muzzle end of slot 72 is proximate an insert or stop 74 located at the left end or muzzle end of barrel 14.
  • the tool is provided with a piston retractor 76 carried by the barrel.
  • This piston retractor comprises a ring slidably mounted on the exterior of the cylindrical barrel and fitted on the outside of the barrel for easy slidable movement therealong.
  • the retractor 76 is provided with a pair of horizontal handles 78 and 80 extending horizontally outwardly from the retractor and just above the upper edges of barrel portion 12 of the housing toward the muzzle end thereof adjacent retaining member 68.
  • Retractor 76 includes a member 82 for engaging piston head portion 27 as when the piston 22 has moved toward the muzzle end of the barrel. As illustrated in H0.
  • barrel 14 may be upraised by pivoting around pin member 64, after which either of the handles 78 or 80 may then be grasped to move retractor 76 to the right.
  • Member 82 engages head portion 27 as retractor 76 is moved to the right, bringing with it piston 22 until the piston is returned to the right end or breech end of barrel 14. Then, retractor 76 is moved to the left-hand position illustrated in the drawings, and indeed must be before barrel 14 can be returned to a position in alignment with breechblock 16.
  • the barrel portion 12 of the housing is cut down at 90 to receive handles 78 and 80 only when retractor 76 is in its forwardmost position.
  • the barrel portion of the housing includes wedge-shaped recess 92 for receiving a lower wedge-shaped portion 94 of the retractor only when the retractor is returned to its left-hand position. Therefore, the retractor 76 is removed out of the way of the movement of piston 22 when the tool is in firing position, thereby avoiding danger to the operator of the tool from undesired movement of retractor 76 when the tool is fired.
  • Lower wedge-shaped portion 94 of retractor 76 carries member 82 in a vertical slot 96 at the middle thereof, with the L-shaped member 82 being pivotally secured in the slot at its rearward end by means of horizontal pin 98.
  • a setscrew 100 in wedge-shaped portion 94 of the retractor normally maintains member 82 in its operating position shown. However, for disassembly of the tool, the retractor 76 is moved rearwardly toward the breech end of the upraised barrel (as illustrated in H6. 5) and the setscrew 100 may be loosened whereby member 82 can be pivoted out of engagement with slot 72 in the barrel. This allows the retractor 76 to be slid off the barrel.
  • Piston 22 is provided with an ejector 86 which may protrude into chamber 36 for ejecting power load or cartridge 88.
  • the ejector 86 is tapered at its rearwardmost end where it may extend into chamber 36. This tapered configuration acts to guide explosion gases along the chamber with minimum lateral deflection of such gases during firing of the tool to prevent chamber erosion.
  • a muffier recess 102 extending longitudinally of the barrel portion of the housing.
  • This mufi'ler recess 102 is closed at the top by liner 104, forming a part of the barrel portion of the housing, and secured by screw 106, except for longitudinal slot 108 substantially matching slot 72 in the barrel.
  • Muffler recess 102 is desirably provided with an internal muffier 110 here comprising a loosely coiled roll of sheet metal.
  • the axis of the roll of sheet metal is disposed in recess 102 in a direction longitudinal of the tool, and the outer end of the roll of sheet metal is oriented upwardly toward slot 108, so the outer entrance of the passage between convolutions of the roll opens toward such slot to receive the explosion gases.
  • the explosion gases tend to take a path between convolutions of the roll, this circuitous path tending to dissipate the energy thereof.
  • the captive piston 22 is tapered between head 24 and ram or plunger 26, and this tapered portion and head 24 have a low hardness and high ductility as compared with a high hardness and little or no ductility of stop 74.
  • the hard metal stop 74 includes a long cylindrical entrance bore 114 and a frustoconical die portion 116.
  • the bore 114 serves to slidably receive the muzzle end of the piston head 24, to the left of head portion 25, should the captive piston 22 be overdriven so that ram 26 extends outwardly at the left of muzzle 15. Should the piston thus be overdriven, piston energy is dissipated by extruding, by frustoconical die portion 116, the tapered portion of the captive piston 22.
  • a fastener device is inserted in muzzle l5 and the user grasps a handle portion or grip 118 and forces the fastener device against a workpiece such as a masonry wall or the like. Urging the tool against a workpiece brings about full contact between power plug 18 and breechblock l6, and
  • the barrel is moved to the left in F IG. l by a distance, X, and the breech end thereof is pivoted upwardly around horizontal pin member 64.
  • the tool may be grasped by means of grip 1113 and snapped in a downward direction causing the barrel M to lower and pivot around horizontal pin member 64 so that the breech end of the barrel including power plug 16 tilts away from the breechblock.
  • a handle 78 or 80 of the retractor 76 is grasped and pulled rearwardly.
  • member 82 engages the outer edge of head portion 27 pulling the piston 22 to the right, back to a firing position.
  • the movement of the piston, as head portion 25 reaches the breech end of slot 72, may force shell or power load 88 from chamber 36. if ejection is not accomplished by air pressure, the ejector contacts the cartridge for forcibly removing the same.
  • the retractor is then returned to its forwardmost position by means of handles 78 or 80, and a new cartridge or power load is inserted in chamber 36.
  • the barrel 14 is then pivoted back into alignment with breechblock 16 for the next operation.
  • retractor 76 when the tool is urged against a workpiece, retractor 76 is automatically urged to the rear of wedge-shaped recess 92, assuming the retractor is not already in such position. With the tool forced against a workpiece, the retractor 76 is held in position between the breech end of recess 92 and the muzzle end ofslot 72. The muzzle end ofslot 72 engages the inwardly extending portion of member 82. Therefore, when the tool is fired, no undesired movement of retractor 76 will take place. It should be noted that even if the piston 22 should be overdriven into stop 74, the edge of head portion 27 will not strike or move member 82 with the retractor 76 in its locked position between the edges of recess 92 and slot 72.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a forward barrel portion
  • breechblock carried by said breech portion
  • said barrel being pivotally engaged by the barrel portion of said housing at a location toward the muzzle end of said barrel so that the breech end of said barrel can be upraised away from said breechblock into a loading position;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end of said barrel;
  • a piston retractor slidably carried by said barrel, said retractor including a member extending into said barrel for engaging said piston and a handle portion which is manually engageable for moving said piston retractor and said piston to a firing position toward the breech end of said barrel.
  • the tool according to claim 1 including a power plug received in the breech end of said barrel for receiving a power load cartridge, with the breechblock being movable rearwardly within said breech portion of said housing from an uncocked to a fully cocked or triggerable position, and wherein the barrel, in addition to being pivotally engaged by the barrel portion of said housing, is also slidable with respect to the barrel portion of said housing into full engagement with said breechblock and is further rearwardly slidable for urging said breechblock into a cocked position in response to pressure of the muzzle end of the barrel against a workpiece.
  • said captive piston includes a head provided with an ejector extending from the breech end of said head for ejecting a cartridge from the power plug when said piston retractor moves the captive piston to the firing position.
  • the tool according to claim 5 including a substantially horizontal pin member carried by said barrel portion of said housing at said location toward the muzzle end of said barrel, said pin member being positioned at the lower side of said barrel, and a matching slot in the underside of said barrel through which said pin member extends, said last mentioned slot having a longitudinal length along said barrel permitting longitudinal sliding movement of the barrel for full engagement with the breechblock plus movement of the breechblock into a cocked position.
  • the barrel portion of the housing is substantially semicircular in cross section for cradling a cylindrical barrel, and is provided with an arched barrel-retaining member proximate said location toward the muzzle end of the barrel for substantially enclosing the upper side of the barrel at such location, said arched barrel-retaining member having an inner semicircular surface for substantially matching the cylindrical barrel in an upraised position thereof and for limiting the upward movement of the barrel.
  • the tool according to claim 8 including a substantially horizontal pin member carried by said barrel portion of said housing at said location toward the muzzle end of the barrel, and at the lower side of said barrel, and a matching slot in the underside of said barrel through which said pin member extends, said last mentioned slot having a longitudinal length along said barrel for permitting longitudinal slidable movement of the barrel for full engagement with the breechblock plus movement of the breechblock into a cocked position.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a for ward barrel portion
  • breechblock carried by said breech portion
  • said barrel being pivotally engaged by the barrel portion of said housing at a location toward the muzzle end of said barrel so that the breech end of said barrel can be upraised away from said breechblock into a loading position;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end ofsaid barrel;
  • handle means extending outwardly from either side of said ring for moving said ring and said piston to a firing position toward the breech end of said barrel;
  • said barrel being provided with a longitudinal slot ending short of the breech and muzzle ends of said barrel, wherein said member for engaging the head of said captive piston extends through said longitudinal slot in said barrel.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a forward barrel portion
  • breechblock carried by said breech portion
  • said barrel being pivotally engaged by the barrel portion of said housing at a location toward the muzzle end of said barrel so that the breech end of said barrel can be upraised away from said breechblock into a loading position;
  • said barrel also being slidable with respect to the barrel portion ofsaid housing in and out ofcocked position;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end ofsaid barrel;
  • a piston retractor slidably carried by said barrel, said retractor including a member for engaging said piston for moving said piston to a firing position toward the breech end ofsaid barrel;
  • said barrel portion of said housing including a recess for receiving a portion of said piston retractor toward the muzzle end of the barrel portion of the housing when said barrel is in said first angular position, the piston retractor being restrained between a portion of said barrel and said recess in the barrel portion of said housing when said barrel is in its cocked position so that said piston retractor will not be struck by movement of said piston in response to explosion of the power load.
  • the tool according to claim 2 including a power plug received in the breech end of said barrel for holding a power load, said breechblock being movable within said breech portion of said housing from an uncocked to a fully cocked or triggerable position, wherein the barrel, in addition to being pivotally engaged by the barrel portion of said housing, is also rearwardly slidable with respect to the barrel portion of said housing into full engagement with said breechblock and is further rearwardly slidable for urging said breechblock into a cocked position in response to pressure of the muzzle end of the barrel against a workpiece, and wherein said barrel portion of said housing includes a recess for receiving said piston retractor toward the muzzle end of the barrel portion of the housing when said barrel is in said first position, the piston retractor being restrained between the muzzle end of the slot in the barrel and the rearward end of the recess in the barrel portion of the housing when the barrel is in a cocked position.
  • the tool according to claim 1 including a power plug received in the breech end of said barrel for receiving a power load, said barrel having a substantially smooth inner bore at the breech end thereof, with said power plug being slidably received therewithin and yieldably retained within said inner bore.
  • said power plug includes a circumferential groove, and spring retaining means mounted within said groove for bearing against the inner bore ofsaid barrel.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a forward barrel portion
  • breechblock carried by said breech portion
  • said barrel being pivotally engaged by the barrel portion of said housing at a location toward the muzzle end of said barrel so that the breech end of said barrel can be upraised away from said breechblock into a loading position;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end ofsaid barrel;
  • a piston retractor slidably carried by said barrel, said retractor including a member for engaging said piston and a handle portion which is manually engageable for moving said piston retractor and said piston to a firing position toward the breech end of said barrel;
  • said tool further including a slot in said barrel at least adjacent the breech end of said barrel, said barrel portion of said housing including a muffler recess communicating with said slot in said barrel when said barrel is in said first position.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a forward barrel portion
  • breechblock carried by said breech portion
  • said barrel being pivotally engaged by the barrel portion of said housing at a location toward the muzzle end of said barrel so that the breech end of said barrel can be upraised away from said breechblock into a loading posi tion;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end of said barrel;
  • a piston retractor slidably carried by said barrel, said retractor including a member for engaging said piston and a handle portion which is manually engageable for moving said piston retractor and said piston to a firing position toward the breech end of said barrel;
  • said barrel being provided with a longitudinal slot ending short of the breech and muzzle ends of said barrel, and wherein said member for engaging said piston extends through said longitudinal slot in said barrel for engaging the head of said piston at the muzzle end thereof;
  • said barrel portion of said housing including a muffler recess communicating with said longitudinal slot in said barrel when said barrel is in said first position, wherein explosive gases from said barrel travel through said slot and into said recess as the head of said captive piston moves past the breech end of said longitudinal slot, said gases further passing along said longitudinal slot toward the muule end ofsaid barrel, and a muffler in said muffler recess.
  • a powder actuated tool comprising:
  • a housing including a rearward breech "portion and a forward barrel portion;
  • a breechblock carried by said breech portion and movable within said breech portion of said housing from an uncocked to a fully cocked or triggerable position;
  • said breechblock also carrying a triggerable firing pin
  • trigger means for operating said firing pin when said breechblock is in a cocked position
  • a substantially horizontal pin member carried by said barrel portion of said housing at a location toward the muzzle end of said barrel, said horizontal pin member being positioned at the lower side of said barrel;
  • a power plug positioned at the breech end of said barrel having a chamber communicating with said barrel for receiving a power load adapted to be fired by said firing pin;
  • first slot in the underside of said barrel through which said horizontal pin member extends, said first slot having a longitudinal length along such barrel permitting longitudinal sliding movement of the barrel for full engagement of the power plug with the breechblock plus movement of the breechblock into a cocked position as the barrel is urged toward a workpiece;
  • said barrel being pivotable about horizontal pin member so that the breech end of said barrel including said power plug can be upraised away from said breechblock into a loading position when the barrel carrying the power plug is withdrawn from engagement with said breechblock;
  • said barrel portion of said housing being provided with an arched barrel retaining member proximate and above the location of said horizontal pin member for substantially enclosing the upper side of the barrel proximate said location, said arched barrel retaining member having an inner surface semicircular in cross section for substantially matching the upper side of the barrel in an upraised position of the barrel for limiting the upward movement of the barrel;
  • said barrel having a longitudinal second slot on the underside of the barrel ending short of the breech and muzzle ends of said barrel;
  • a captive piston longitudinally slidable within said barrel and movable in response to an explosion of the power load in the power plug for driving a fastener element
  • a ring-shaped piston retractor slidably carried on the exterior of said barrel, said retractor including a member for engaging said piston through a longitudinal second slot in the barrel and a handle portion which is manually engageable for moving said piston retractor and said piston to a firing position toward the breech end of said barrel;
  • said barrel portion of said housing including a recess for receiving said piston retractor toward the muzzle end of the barrel portion when the barrel is in a position of alignment with the breechblock such that said piston retractor does not interfere with the movement of said captive piston in response to explosion of the power load.
  • the tool according to claim 1 further including means for preventing movement of said barrel into said first position until said piston retractor is positioned far enough toward the muzzle end of said barrel so that said member for engaging said piston does not interfere with the movement of said piston in driving said fastener element.
  • a powder actuated tool comprising:
  • a housing including a rearward breech portion and a forward barrel portion
  • breechblock carried by said breech portion
  • a barrel carried by said barrel portion and provided with a longitudinal slot ending short of the breech and muzzle ends of said barrel and through which explosive gases may escape from said barrel;
  • a captive piston longitudinally slidable within said barrel and movable in res onse to explosion of a power load for driving a fastener e ement mto a workpiece at the muzzle end of said barrel;
  • said barrel portion of said housing being provided with a muffler recess communicating with said slot near the breech end thereof for receiving expansion of explosive gases from said barrel as the head of the captive piston passes the breech end of said longitudinal slot;
  • a muffler in said muffler recess wherein said muffler comprises a roll of sheet metal located in said muffler recess.
  • a powder actuated tool comprising:
  • a housing including 'a rearward breech portion and a forward barrel portion;
  • breechblock carried by said breech portion
  • a barrel carried by said barrel portion and provided with a longitudinal "slot ending short of the breech and muzzle ends of said barrel and through which explosive gases may escape from said barrel;
  • a captive piston longitudinally slidable within said barrel and movable in response to explosion of a power load for driving a fastener element into a workpiece at the muzzle end of said barrel;
  • said barrel portion of said housing being provided with a muffler recess communicating with said slot near the breech end thereof for receiving expansion of explosive gases from said barrel as the head of the captive piston passes the breech end of said longitudinal slot;
  • said barrel portion of said housing includes a longitudinal slot matching the breech end portion of said longitudinal slot in said barrel, said muffler recess being closed except for the longitudinal slot in the barrel portion of the housing communicating therewith.
  • said muffler comprises a loosely coiled roll of sheet metal disposed in said recess with the axis of the roll in a direction longitudinal of said tool.

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  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US737900A 1968-06-18 1968-06-18 Powder actuated tool Expired - Lifetime US3563439A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73790068A 1968-06-18 1968-06-18
US05/656,615 US4025029A (en) 1968-06-18 1976-02-09 Hammer-activated powder-actuated fastening tool

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US3563439A true US3563439A (en) 1971-02-16

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US737900A Expired - Lifetime US3563439A (en) 1968-06-18 1968-06-18 Powder actuated tool
US05/656,615 Expired - Lifetime US4025029A (en) 1968-06-18 1976-02-09 Hammer-activated powder-actuated fastening tool

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US05/656,615 Expired - Lifetime US4025029A (en) 1968-06-18 1976-02-09 Hammer-activated powder-actuated fastening tool

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US (2) US3563439A (de)
BE (1) BE850926A (de)
DE (2) DE1930661C3 (de)
FR (1) FR2340176A1 (de)
GB (2) GB1251849A (de)

Cited By (14)

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US3670942A (en) * 1970-10-15 1972-06-20 Omark Industries Inc Automatic feeding of fasteners
US3688964A (en) * 1970-09-01 1972-09-05 Speed Fastener Inc Fastener drive tool for caseless loads
US3718271A (en) * 1969-10-10 1973-02-27 Impex Essen Vertrieb Driving device for driving bolts or other drivepins into fixed structural or building elements or the like
US3804315A (en) * 1972-06-02 1974-04-16 Omark Industries Inc Powder actuated tool
US3915242A (en) * 1974-05-14 1975-10-28 Star Expansion Ind Corp Fastener driving power tool
US3997096A (en) * 1974-03-08 1976-12-14 Hilti Aktiengesellschaft Arrangement for cooling an explosive charge-driven setting gun
US4025029A (en) * 1968-06-18 1977-05-24 Desa Industries, Inc. Hammer-activated powder-actuated fastening tool
US4093110A (en) * 1977-03-11 1978-06-06 Olin Corporation Noise and fouling reducer for powder-actuated tool
US4705200A (en) * 1985-02-08 1987-11-10 Uniset Corporation Pivot-load powder actuated tool with firing chamber insert
WO2005013438A2 (en) * 2003-08-01 2005-02-10 Tyco Electronics Corporation Tools for securing connectors using explosive charges and methods for using the same
US6996987B2 (en) 2003-08-01 2006-02-14 Tyco Electronics Corporation Tools for securing connectors using explosive charges and methods for using the same
US7182653B1 (en) 2006-04-21 2007-02-27 Tyco Electronics Corporation Connector assemblies and methods for forming a connection between cables
US20070240301A1 (en) * 2006-04-17 2007-10-18 Tyco Electronics Corporation Methods and apparatus for connecting conductors using a wedge connector
US20110186321A1 (en) * 2010-02-02 2011-08-04 Chambers Scott E Pneumatically Powered Impact Device and Method

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US4252259A (en) * 1979-05-29 1981-02-24 Brosius Bros., Inc. Hammer drive tool
US4487353A (en) * 1981-11-18 1984-12-11 International Telephone And Telegraph Corporation Powder actuated tool
CA1220302A (en) * 1983-05-24 1987-04-14 Harry M. Haytayan Powder-actuated fastener-driving tool
PL146731B1 (en) * 1985-01-17 1989-03-31 Ct Kt Maszyn Gorniczych Komag Roof support dynamic load generator
US4651912A (en) * 1985-05-28 1987-03-24 Uniset Corporation Hammer-activated fastener tool
US4830252A (en) * 1986-07-23 1989-05-16 Continental/Midland, Inc. Hammer-activated, powder-actuated drive tool
DE3642606A1 (de) * 1986-12-13 1988-06-23 Hilti Ag Pulverkraftbetriebenes bolzensetzgeraet
US4890778A (en) * 1988-04-29 1990-01-02 Hawkins Robert E Hammer-activated fastener tool for driving fastener projectiles
US5038665A (en) * 1990-02-02 1991-08-13 Honeywell Inc. Silent stud gun attachment device
US5271309A (en) * 1992-07-06 1993-12-21 Desa International, Inc. Cartridge retaining means for a hammer-activated powder-actuated fastening tool
US5269450A (en) * 1993-02-10 1993-12-14 Illinois Tool Works, Inc. Hammer-strikable, powder-actuated, fastener-driving tool
CA2287033A1 (en) 1999-10-21 2001-04-21 Geoid Exploration Ltd. Land-marking device and a method of land surveying and marking
US6631668B1 (en) 2000-11-10 2003-10-14 David Wilson Recoilless impact device
WO2003001075A1 (en) * 2001-06-21 2003-01-03 Black & Decker, Inc. Explosive assisted expanding fastener
WO2003001073A2 (en) * 2001-06-21 2003-01-03 Black & Decker Inc. Method and apparatus for fastening steel framing with nails
WO2003001072A1 (en) * 2001-06-21 2003-01-03 Black & Decker Inc. Method and apparatus for fastening steel framing using helical features
WO2003001074A1 (en) * 2001-06-21 2003-01-03 Black & Decker Inc. Method and apparatus for fastening steel framing members
WO2003000466A2 (en) * 2001-06-21 2003-01-03 Black & Decker Inc. Method and apparatus for fastening steel framing by crimping
DE102007000226A1 (de) * 2007-04-13 2008-10-16 Hilti Aktiengesellschaft Handgeführtes Eintreibgerät
TWM363973U (en) * 2009-04-28 2009-09-01 Chung-Yi Lee Fired pin assembly for powder actuated nail gun
GB201308564D0 (en) * 2013-05-13 2013-06-19 Qinetiq Ltd Tool
NL1042591B1 (en) 2017-10-16 2019-04-24 Magali Shachar Cleft-Mallet
AU2022373162A1 (en) * 2021-10-22 2024-06-06 Dan ESSLINGER Golf balls with kinetic projectiles

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US3022513A (en) * 1960-09-20 1962-02-27 Mine Safety Appliances Co Explosive actuated stud driving tool
US3029435A (en) * 1955-04-15 1962-04-17 Olin Mathieson Power-actuated tool
US3172120A (en) * 1956-12-31 1965-03-09 Olin Mathieson Explosive actuated tool
US3172119A (en) * 1961-09-08 1965-03-09 Olin Mathieson Explosive-powered fastening tools
US3297224A (en) * 1965-04-30 1967-01-10 Olin Mathieson Power actuated tool
US3348751A (en) * 1965-08-02 1967-10-24 Olin Mathieson Power operated piston tool

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US2768375A (en) * 1955-08-04 1956-10-30 Remington Arms Co Inc Cartridge-powered tool
DE1210390B (de) * 1958-06-07 1966-02-03 Alpine Ag Maschinenfabrik Vorrichtung zum Eintreiben von Bolzen, insbesondere fuer schwere Verankerungen
DE1176577B (de) * 1958-06-07 1964-08-20 Mettmann Walter Schulz Bolzensetzgerät
DE1212008B (de) * 1960-12-13 1966-03-03 Georg Groetsch Gad Kohlgrub Dr Bolzensetzgeraet
GB1007188A (en) * 1962-10-26 1965-10-13 Georg Grotsch Improvements in or relating to cartridge-actuated bolt injecting devices
DE1603722B2 (de) * 1966-12-10 1971-01-21 The Birmingham Small Arms Co Ltd , Birmingham (Großbritannien) Sicherheitseinrichtung gegen unbeab sichtigtes Zünden eines mit Schubkolben ver sehenen Brennkraftbolzensetzers
US3563439A (en) * 1968-06-18 1971-02-16 Omark Industries Inc Powder actuated tool
DE1703945A1 (de) * 1968-08-03 1972-06-08 Impex Essen Vertrieb Bolzensetzgeraet
US3558032A (en) * 1969-06-12 1971-01-26 Usm Corp Hammer ignition explosive tools with safety means
US3688964A (en) * 1970-09-01 1972-09-05 Speed Fastener Inc Fastener drive tool for caseless loads

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US3029435A (en) * 1955-04-15 1962-04-17 Olin Mathieson Power-actuated tool
US3172120A (en) * 1956-12-31 1965-03-09 Olin Mathieson Explosive actuated tool
US3022513A (en) * 1960-09-20 1962-02-27 Mine Safety Appliances Co Explosive actuated stud driving tool
US3172119A (en) * 1961-09-08 1965-03-09 Olin Mathieson Explosive-powered fastening tools
US3297224A (en) * 1965-04-30 1967-01-10 Olin Mathieson Power actuated tool
US3348751A (en) * 1965-08-02 1967-10-24 Olin Mathieson Power operated piston tool

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025029A (en) * 1968-06-18 1977-05-24 Desa Industries, Inc. Hammer-activated powder-actuated fastening tool
US3718271A (en) * 1969-10-10 1973-02-27 Impex Essen Vertrieb Driving device for driving bolts or other drivepins into fixed structural or building elements or the like
US3688964A (en) * 1970-09-01 1972-09-05 Speed Fastener Inc Fastener drive tool for caseless loads
US3670942A (en) * 1970-10-15 1972-06-20 Omark Industries Inc Automatic feeding of fasteners
US3804315A (en) * 1972-06-02 1974-04-16 Omark Industries Inc Powder actuated tool
US3997096A (en) * 1974-03-08 1976-12-14 Hilti Aktiengesellschaft Arrangement for cooling an explosive charge-driven setting gun
US3915242A (en) * 1974-05-14 1975-10-28 Star Expansion Ind Corp Fastener driving power tool
US4093110A (en) * 1977-03-11 1978-06-06 Olin Corporation Noise and fouling reducer for powder-actuated tool
US4705200A (en) * 1985-02-08 1987-11-10 Uniset Corporation Pivot-load powder actuated tool with firing chamber insert
WO2005013438A3 (en) * 2003-08-01 2005-06-02 Tyco Electronics Corp Tools for securing connectors using explosive charges and methods for using the same
WO2005013438A2 (en) * 2003-08-01 2005-02-10 Tyco Electronics Corporation Tools for securing connectors using explosive charges and methods for using the same
US6996987B2 (en) 2003-08-01 2006-02-14 Tyco Electronics Corporation Tools for securing connectors using explosive charges and methods for using the same
AU2004301925B2 (en) * 2003-08-01 2010-08-12 Te Connectivity Solutions Gmbh Tools for securing connectors using explosive charges and methods for using the same
CN1864306B (zh) * 2003-08-01 2010-12-08 泰科电子有限公司 使用炸药来固定连接器的工具及其使用方法
US20070240301A1 (en) * 2006-04-17 2007-10-18 Tyco Electronics Corporation Methods and apparatus for connecting conductors using a wedge connector
US7426782B2 (en) 2006-04-17 2008-09-23 Tyco Electronics Corporation Methods and apparatus for connecting conductors using a wedge connector
US8402641B2 (en) 2006-04-17 2013-03-26 Tyco Electronics Corporation Apparatus for connecting conductors using a wedge connector
US7182653B1 (en) 2006-04-21 2007-02-27 Tyco Electronics Corporation Connector assemblies and methods for forming a connection between cables
US20110186321A1 (en) * 2010-02-02 2011-08-04 Chambers Scott E Pneumatically Powered Impact Device and Method
US8418781B2 (en) * 2010-02-02 2013-04-16 Rapid Entry Solutions, Llc Pneumatically powered impact device and method

Also Published As

Publication number Publication date
DE1930661A1 (de) 1970-06-11
DE2705172A1 (de) 1977-08-11
DE1930661C3 (de) 1979-03-22
GB1515254A (en) 1978-06-21
DE1930661B2 (de) 1978-07-20
FR2340176A1 (fr) 1977-09-02
US4025029A (en) 1977-05-24
GB1251849A (de) 1971-11-03
FR2340176B1 (de) 1982-03-12
BE850926A (fr) 1977-05-16

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