US3786977A - Explosive fastener driving tool - Google Patents

Explosive fastener driving tool Download PDF

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Publication number
US3786977A
US3786977A US00256085A US3786977DA US3786977A US 3786977 A US3786977 A US 3786977A US 00256085 A US00256085 A US 00256085A US 3786977D A US3786977D A US 3786977DA US 3786977 A US3786977 A US 3786977A
Authority
US
United States
Prior art keywords
barrel
breech
housing
ram
pawl
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
US00256085A
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English (en)
Inventor
T Shamaly
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.)
Illinois Tool Works Inc
USM Corp
Original Assignee
USM Corp
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 USM Corp filed Critical USM Corp
Application granted granted Critical
Publication of US3786977A publication Critical patent/US3786977A/en
Assigned to ILLINOIS TOOL WORKS INC, A CORP. OF DE. reassignment ILLINOIS TOOL WORKS INC, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OLIN CORPORATION
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
    • B25C1/08—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

Definitions

  • a tool generally desigtools of the type employing a captive driving rarn recipnated comprises a barrel 12 (FIGS. 1 and 5) longiturocable axially in a barrel.
  • the fastener is. muzzle loaded, and a charge such as a cartridge is loaded in a breech bore of the barrel.
  • the breech is locked by rota.- tion of a safety collar that prevents air firing.
  • the tool is cocked by pressing its muzzle against a surface, usually concrete or metal, into which the fastener is to be driven.
  • Another object of the invention is to provide a ramtype fastener driving tool of simple construction wherein cocking can not be effected unless a barrel for the ram is locked in breech closed position.
  • a further object of the invention is to provide, in a tool of the type indicated, means whereby a barrel for the ram can not be unlocked when the tool is cocked in the firing position.
  • a feature of this invention resides in the provision of a tool having, in, combination, a receiver, a barrel slidably carrying a ram and axially movable and rotatably mounted in the receiver, the barrel being formed with circumferentially interrupted sets of threads lockable in breech-closed relation and having a longitudinal slot extending forwardly thereof between two of such thread sets, and a pawl pivotally carried by the receiver and adapted, when the barrel breech is unlocked, to be engaged in the barrel slot. As herein shown the pawl is spring-urged to interengage with the barrel slot.
  • FIG. 1 is an axial section of a fastener driving tool in its barrel breech closed and unlocked and uncocked condition
  • FIG. 2 is a transverse section of the tool taken on line Il--II of FIG. 1 and showing a pawl engaged in a longitudinal slot of the barrel which is unlocked;
  • FIG. 3 is a section similar to that of FIG. 2 and showing disengagement of the pawl when the barrel is relatively turned to locked position;
  • FIG. 4 is a perspective detail of barrel and receiver interlock portions looking in the general direction of the arrows IV-IV in FIG. 1, and
  • FIG. 5 is a view in side elevation of the barrel and indicating angular relation of its guide slot and breech locking threads.
  • a handle housing 16 is secured externally to the breech end of the receiver.
  • a piston-type ram 24 is axially slidable from a first position shown in FIG. 1 to a final or fired, leftward position indicated by dash lines wherein a head portion 26 of the ram abuts the buffer 22.
  • the ram is tapered as at 30 (FIG. 1) to radially expand the bore of the buffer 22 on overdrive.
  • a flange 28 of the guide 20 is threadedly retained against the muzzle end of the barrel and an inner end of the guide abuts the buffer 22.
  • a safety barrel-turning collar 32 is mounted on the guide 20 by a pair of guide lock screws 34, 34 respectively slidable in longitudinal slots 36 of the collar and threaded into the barrel.
  • the barrel 12 has its breech end formed with sets of circumferentially interrupted locking threads 38. Also, for purposes hereinafter explained, the barrel is formed with a longitudinal slot 40 aligned with an interruption or non-threaded breech portion. An end portion 42 of the slot 40, as indicated in FIGS. 2, 3, and 5 is angularly offset for permitting pivotal movement therein of one arm of a twoarmed pawl 44 secured on a pin 46 mounted in bores in the receiver parallel to the barrel axis. The arrangement is such that when, as in FIG.
  • the sets of barrel threads 38 are not in locking engagement with corresponding sets of interrupted locking threads 48 formed in an action or breechblock 50 secured in the breech end of the receiver, an end of a coil spring 52 nested in the receiver urges a portion of the pawl 44 into the barrel slot 40.
  • the pawl can engage the driven ram head 26, and accordingly subsequent relative forward, i.e., muzzleward, movement of the barrel l2 enables the pawl 44 to restore the ram 24 to its initial position therein indicated in FIG. 1.
  • the receiver 14 has an open-sided portion 54 (FIG. 1) providing access to a barrel breech bore 56, when the barrel is unlocked and retracted from the breechblock, for loading a cartridge or the like therein.
  • the barrel When a charge is loaded, the barrel may be relatively rotated a fraction of a turn by means of the collar 32 to lock the barrel threads 38 with the breechblock locking threads 48 as shown in FIG. 3. This simultaneously effects disengagement of the pawl 44 from the barrel slot 40 against resistance of the spring 52.
  • the latter may be brought to bear endwise on a structure to cook the tool in preparation for firing. Resulting relative displacement to the right (in FIG. 1) of the guide flange 28, and hence of the barrel 12, cocks a compression spring of firing mechanism which may,
  • the barrel 12 is preferably also formed with stop means for preventing unlocking of the barrel breech when the tool is armed, i.e., loaded and locked.
  • the barrel as shown in FIGS. 4 and 5, has adjacent its end and circumferentially spaced pads, three of which are designated 84 and a fourth pad having reduced interlock projection 86.
  • the latter is shown in different positions in FIG. 4 and arranged to circumferentially abut with a complemental land 88 internally formed on the receiver 14 when the barrel breech has been closed and locked, insuring that the barrel 12 is always locked into the housing 16 in the same orientation.
  • the projection 86 may further serve to prevent the barrel breech from being excessively rotated on being shifted to open position.
  • the pad arrangement 84 prevents arming the tool with its breech unlocked.
  • this rotation aligns the barrel pads 84 with their complementary housing recesses allowing rearward movement of the barrel 12 to take place.
  • the tool being uncooked and locked, but with the ram head 26 in firing position, the fastener to be driven is placed into the detachable guide 20.
  • the tool is cocked by bringing the muzzle end of the guide 20 to contact the structure which is to receive the fastener and bearing on the housing 16 to urge it forwardly relative to the barrel 12.
  • the tool is now cocked and locked, but if the operator tries to cock the tool while it is unlocked, the barrel engages the pawl 44, and the pads 84 abut the receiver 14 to prevent him.
  • pawl 44 prevents tool cocking when the barrel 12 is not locked to the housing 16 so that the tool cannot be fired when unlocked and rapid separation of the barrel is avoided.
  • pads 84 also insure the tool is not cocked in unlocked condition.
  • pads 84 prevent unlocking the barrel from the housing while the firing mechanism is cocked.
  • pad 86 prevents excessive rotation of the barrel, which would eliminate the safety afforded by the pawl 44.
  • a receiver In an explosively actuated fastener driving tool, a receiver, a barrel axially slidable and rotatable in the receiver, a ram slidable in the barrel between an initial firing position and a second fired position, the barrel having its breech end formed with circumferentially interrupted sets of threads for locking the barrel in the receiver in breech-closed relation and having a longitudinal slot extending in alignment with the thread set interruption, and a pawl movably carried by the receiver and adapted, when the barrel breech is unlocked, to be engaged in the barrel slot.
  • an explosively actuated fastener driving tool having a receiver for housing the breechblock and firing mechanism, a barrel axially slidable and rotatable in the receiver and having a muzzle portion extending beyond the receiver, the breech end of the barrel and the breechblock being formed with circumferentially interrupted threads engageable to lock said breech end in operative relation to the firing mechanism, the firing mechanism being energizable by relative longitudinal movement of the barrel and receiver, and an interlock means formed on said muzzle portion of the barrel for cooperation with the receiver whereby .the barrel breech is prevented from being unlocked when the tool is armed.
  • interlock means comprises a circumferential series of pads on the barrel, each of said pads being receivable in a complemental mating recess in an end of the receiver, and one of said barrel pads having a reduced, projection engageable with a complemental land of the receiver.
  • An explosive fastener driving tool comprising a housing, a barrel axially movable and rotatable therein between a breech open and breech closed position, a spring-pressed firing mechanism including a breechblock in the breech end of the housing and cocked by relative movement of the barrel and the housing when the latter is urged toward a structure into which the fastener is to be driven, and means at the muzzle end of the barrel for rotating it into breech closed and locked relation to the breechblock, said means being longitudinally movable on the barrel and having a formation for interlocking with the housing in one rotational position to prevent unlocking of the barrel breech when the tool is cocked.
  • a resilient buffer is disposed in the muzzle of the barrel and formed with a bore wall coaxial with the ram and adapted to be radially enlarged upon engagement therewith of a trailing portion of the ram, such engagement being potentially permitted by breech locking movement of the barrel to clear the pawl from the barrel slot.
  • An explosive fastener driving tool comprising a housing, a barrel axially movable and rotatable therein between a breech open and a breech closed position, a breechblock in the housing having a threaded formation for locking the barrel in breech closed relation, 2 ram axially slidable in the barrel and having an axially tapering portion, a pawl pivotal in the housing and having a portion extending radially through a longitudinal slot in the barrel and partly into the path of the ram, said pawl being cammed out of said path by rotation of the barrel into locking relation with the breechblock, and a resilient, tubular buffer on the other side of the pawl from the breech end of the tool, the bore of the buffer being adapted to be radially expandable upon engagement by said ram tapering portion for absorbing ram energy in the event of overdrive.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00256085A 1972-05-23 1972-05-23 Explosive fastener driving tool Expired - Lifetime US3786977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25608572A 1972-05-23 1972-05-23

Publications (1)

Publication Number Publication Date
US3786977A true US3786977A (en) 1974-01-22

Family

ID=22971052

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256085A Expired - Lifetime US3786977A (en) 1972-05-23 1972-05-23 Explosive fastener driving tool

Country Status (8)

Country Link
US (1) US3786977A (enrdf_load_stackoverflow)
JP (1) JPS4943281A (enrdf_load_stackoverflow)
AU (1) AU5591373A (enrdf_load_stackoverflow)
CA (1) CA977501A (enrdf_load_stackoverflow)
DE (1) DE2325113A1 (enrdf_load_stackoverflow)
FR (1) FR2185482B1 (enrdf_load_stackoverflow)
IT (1) IT987826B (enrdf_load_stackoverflow)
SE (1) SE407027B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006786A (en) * 1975-07-22 1977-02-08 M. E. Cunningham Company Power actuated portable marking tool
US4487353A (en) * 1981-11-18 1984-12-11 International Telephone And Telegraph Corporation Powder actuated tool
US4492329A (en) * 1981-11-18 1985-01-08 International Telephone And Telegraph Corporation Powder actuated tool
EP0868979A1 (fr) * 1997-04-02 1998-10-07 Societe De Prospection Et D'inventions Techniques Spit Appareil de scellement de tampon à retenue de canon effaçable
US20050051590A1 (en) * 2003-09-05 2005-03-10 Johann Buechel Setting tool
US20060027087A1 (en) * 2004-08-09 2006-02-09 Paul Gaudron Firing pin actuation and reset mechanism for a powder actuated setting tool and method
US20090320673A1 (en) * 2008-06-27 2009-12-31 Rheinmetall Waffe Munition Gmbh Gun barrel
US20110006097A1 (en) * 2008-01-30 2011-01-13 Itw Construction Systems Australia Pty Ltd Fastener driving tool
US20160311096A1 (en) * 2013-12-18 2016-10-27 Hilti Aktiengesellschaft Driving device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1220302A (en) * 1983-05-24 1987-04-14 Harry M. Haytayan Powder-actuated fastener-driving tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494125A (en) * 1968-06-24 1970-02-10 Omark Industries Inc Powder actuated tool
US3543986A (en) * 1968-11-06 1970-12-01 Olin Corp Extractor for cartridge-actuated device
US3549074A (en) * 1968-05-01 1970-12-22 Olin Mathieson Power adjustment for piston tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549074A (en) * 1968-05-01 1970-12-22 Olin Mathieson Power adjustment for piston tool
US3494125A (en) * 1968-06-24 1970-02-10 Omark Industries Inc Powder actuated tool
US3543986A (en) * 1968-11-06 1970-12-01 Olin Corp Extractor for cartridge-actuated device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006786A (en) * 1975-07-22 1977-02-08 M. E. Cunningham Company Power actuated portable marking tool
US4487353A (en) * 1981-11-18 1984-12-11 International Telephone And Telegraph Corporation Powder actuated tool
US4492329A (en) * 1981-11-18 1985-01-08 International Telephone And Telegraph Corporation Powder actuated tool
EP0868979A1 (fr) * 1997-04-02 1998-10-07 Societe De Prospection Et D'inventions Techniques Spit Appareil de scellement de tampon à retenue de canon effaçable
FR2761631A1 (fr) * 1997-04-02 1998-10-09 Spit Soc Prospect Inv Techn Appareil de scellement de tampon a retenue de canon effacable
US6015078A (en) * 1997-04-02 2000-01-18 Societe De Prospection Et D'inventions Techniques Spit Retractable barrel-holding plug fixing apparatus
US20050051590A1 (en) * 2003-09-05 2005-03-10 Johann Buechel Setting tool
WO2006020446A1 (en) * 2004-08-09 2006-02-23 Powers Products Iii, Llc Firing pin actuation and reset mechanism for a powder actuated setting tool and method
US20060027087A1 (en) * 2004-08-09 2006-02-09 Paul Gaudron Firing pin actuation and reset mechanism for a powder actuated setting tool and method
US7237705B2 (en) 2004-08-09 2007-07-03 Powers Products Iii, Llc Firing pin actuation and reset mechanism for a powder actuated setting tool and method
US20110006097A1 (en) * 2008-01-30 2011-01-13 Itw Construction Systems Australia Pty Ltd Fastener driving tool
US8640939B2 (en) * 2008-01-30 2014-02-04 Itw Construction Systems Australia Pty Ltd Fastener driving tool
US20090320673A1 (en) * 2008-06-27 2009-12-31 Rheinmetall Waffe Munition Gmbh Gun barrel
US8215221B2 (en) * 2008-06-27 2012-07-10 Rheinmetall Waffe Munition Gmbh Gun barrel
US20160311096A1 (en) * 2013-12-18 2016-10-27 Hilti Aktiengesellschaft Driving device
US10556332B2 (en) * 2013-12-18 2020-02-11 Hilti Aktiengesellschaft Driving device

Also Published As

Publication number Publication date
JPS4943281A (enrdf_load_stackoverflow) 1974-04-23
FR2185482A1 (enrdf_load_stackoverflow) 1974-01-04
CA977501A (en) 1975-11-11
IT987826B (it) 1975-03-20
DE2325113A1 (de) 1973-12-06
FR2185482B1 (enrdf_load_stackoverflow) 1977-02-11
SE407027B (sv) 1979-03-12
AU5591373A (en) 1974-11-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ILLINOIS TOOL WORKS INC, A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OLIN CORPORATION;REEL/FRAME:004511/0377

Effective date: 19860131