By Breech Block Or Barrel Motion Patents (Class 89/145)
  • Patent number: 10598452
    Abstract: An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: March 24, 2020
    Assignee: LWRC International LLC
    Inventor: Jesus S. Gomez
  • Patent number: 10309739
    Abstract: An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearms gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pins annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end and an extractor recess. The extractor recess is constructed to accommodate an enlarged extractor claw while not undercutting the bolt lugs adjacent thereto. The extractor engages approximately 57% more of a seated ammunition cartridges rim as compared to some prior art AR15/M16 type extractors used with automatic firearms chambered in 6.8SPC. The result is an improved bolt and bolt carrier which provides for increased operational reliability.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: June 4, 2019
    Assignee: LWRC International LLC
    Inventor: Jesue S. Gomez
  • Patent number: 10247502
    Abstract: Invention is about the innovation in trigger locking pins which prevent the pistols to be fired involuntarily.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: April 2, 2019
    Assignee: SAMS UN YURT SAVUNMA SANAYI VE TICARET A. S.
    Inventor: Recep Kilic
  • Patent number: 10234225
    Abstract: A disconnector for pistols having a trigger bar uses a body rotatably mounted on the pistol frame to permit or prevent engagement between the trigger bar and the pistol's sear. The body has a plurality of surfaces, one of which engages the trigger bar and pivots it between a safe orientation, out of alignment with the pistol's sear, and a fire orientation, aligned with the sear, when the body rotates between a safe position and a fire position. Another body surface engages the slide, the body being rotated into the safe position when the slide is out of battery. Another surface engages a grip safety and another surface engages a manual safety. Both safeties effect rotation of the body between the safe and fire positions when they are actuated.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 19, 2019
    Assignee: Smith & Wesson Corp.
    Inventors: Gary Zukowski, Simon M. Muska
  • Patent number: 10203172
    Abstract: A pistol with a frame, a slide which is movable thereon and a rotary barrel which is located in the slide. The rotary barrel is rotated and moved axially with respect to the slide between a locked position and an open position by means of cams and grooves. In order to avoid the wear which is customary in weapons of this type, the slide is provided with a stop surface running obliquely with respect to the bore axis, and the barrel has a corresponding contact surface. During the locking by the flat contact between said surfaces, the beginning of the relative rotational movement is initiated. By virtue of this precisely guided and directed interaction, wear can be reduced by orders of magnitude relative to the prior art.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: February 12, 2019
    Assignee: Glock Technology GmbH
    Inventor: Friedrich Dechant
  • Patent number: 10113821
    Abstract: Exemplary trigger systems reduce trigger slop in polymer-framed pistols. Via use of an oil-impregnated bushing, stacked tolerances are reduced and/or eliminated, leading to improved trigger feel and function.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: October 30, 2018
    Assignee: Nous Defions, LLC
    Inventor: David Pavlick
  • Patent number: 9810495
    Abstract: An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: November 7, 2017
    Assignee: LWRC International LLC
    Inventor: Jesus S. Gomez
  • Patent number: 9772156
    Abstract: A method of installing a safety selector in a firearm includes inserting the safety selector into an opening in the firearm, aligning a hole extending through the safety selector with a cavity extending transversely from the opening, inserting a spring through the hole and into the cavity, inserting a detent plunger through the hole and at least partially into the cavity, thereby compressing the spring, and moving the safety selector within the opening transversely to the cavity so as to capture the detent plunger at least partially within the cavity. The invention also encompasses a method of removing the safety selector.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: September 26, 2017
    Assignee: Smith & Wesson Corp.
    Inventors: Matteo Vincenzio Viviano, Joshua Raymond Lloyd
  • Patent number: 9752841
    Abstract: A trigger device for activating a firing mechanism, the trigger device comprising a housing, a trigger pivotally mounted on the housing via a trigger pivot pin, a sear arm comprising a first sear surface, a ticker extending generally from the trigger to the sear arm, the ticker pivotable about a ticker pivot pin, the ticker comprising spaced apart flanges, each of which comprises an aperture defining at least a first contact surface, and a captured roller positioned at least partially within the apertures, wherein in a captured position the first sear surface and the first contact surfaces engage the captured roller and in a released position the first contact surfaces disengage from the captured roller to allow the captured roller to move within the aperture.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: September 5, 2017
    Assignee: Trigger Tech
    Inventor: Mats Lipowski
  • Patent number: 9140510
    Abstract: A pistol has a disconnector for disconnecting a trigger bar from a sear to allow the sear to reset and engage and hold a hammer in a cocked position. Motion of a slide causes rotation of the disconnector through interaction between a cam surface on the slide and a cam follower on the disconnector. A contact surface on the disconnector engages the trigger bar upon rotation of the disconnector and moves the trigger bar out of engagement with the sear. A biasing spring resets the sear into engagement with the hammer which is rotated into the cocked position by motion of the slide.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: September 22, 2015
    Assignee: Smith & Wesson Corp.
    Inventor: Simon Michael Muska
  • Patent number: 8601932
    Abstract: A semi-automatic pistol is provided having a frame, a slide and an arced cam surface extending longitudinally on an inner surface of the slide. The pistol has a barrel mounted between the frame and the slide, and a firing pin mechanism mounted in the slide. A trigger is mounted on the frame. A trigger bar and a sear are also provided. The trigger bar includes a generally planar surface extending between the ends of the trigger bar. The first end is connected to the trigger and the second end has a sear disconnect surface to engage and disengage a sear rotatably disposed in the frame that engages an end of the firing pin. A tab is disposed at an angle to the generally planar surface, where the tab has a top curved surface to slide along the arced cam surface of the slide as the slide moves.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: December 10, 2013
    Assignee: Kimber IP, LLC
    Inventors: Yury Karfiol, John Goliber
  • Patent number: 7676974
    Abstract: In an automatic rifle which has been converted for non-military purposes to be semi-automatic by the removal of parts that allow its automatic function, additional suppressing elements are provided to ensure that the interruptor remains depressed until the bolt carrier fully passes the striker catch before the striker catch is engaged by the interruptor. This prevents premature connection of the striker catch and the interruptor, which could prevent sufficient striker spring pressure so that the next round can be fired. In one embodiment the trigger mechanism is fitted with an additional suppressing element (10) formed as a side push plate 7 on the bridge (6) of bolt carrier (5).
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: March 16, 2010
    Assignee: Tomas Quis
    Inventor: Vladimir Zemanek
  • Patent number: 7562614
    Abstract: A closed bolt system with a trigger assembly for converting an open bolt, blowback type submachine gun into a single firing carbine is provided. The closed bolt system with trigger assembly includes a tensioned trigger member supporting a tensioned disconnector system. A tensioned sear interacts with the disconnector system and a tensioned hammer. The hammer strikes a firing pin in the bolt when it is released from the sear. The blowback of the bolt, as a result of expanding gases from the exploding and exiting round, re-cocks the hammer by re-engaging the sear with the hammer and disengages the sear from the disconnector system. Only after releasing the trigger will the sear re-engage with the disconnector system and thereby permit another round to be fired. A receiver having a cavity encloses the bolt and prohibits a fully automatic bolt to be used therewith.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: July 21, 2009
    Assignee: SA Ordinance, LLC
    Inventor: Timothy J. Polston
  • Patent number: 7343706
    Abstract: A camblock assembly with a camblock and a guide rod is employed in a firearm having a frame constructed of synthetic polymer material. The camblock has a front flange with flange surfaces that engage corresponding bearing surfaces of the frame to distribute forces and energy to the frame during recoil of the firearm. A shelf member is positioned at a front end of the camblock and a coiled flat wire buffer spring is positioned about the guide rod to resist movement of a reciprocating slide. A detent mechanism positioned within the camblock contacts a surface of a slide stop pin to hold the slide stop latch in place. The interior of the slide stop latch contains an elongated wire having an end that engages the frame such that the slide stop latch is biased in a down position.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 18, 2008
    Assignee: Sturm Ruger & Co., Inc.
    Inventor: James McGarry
  • Patent number: 7337571
    Abstract: A camblock assembly with a camblock and a guide rod is employed in a firearm having a frame constructed of synthetic polymer material. The camblock has a front flange with flange surfaces that engage corresponding bearing surfaces of the frame to distribute forces and energy to the frame during recoil of the firearm. A shelf member is positioned at a front end of the camblock and a coiled flat wire buffer spring is positioned about the guide rod to resist movement of a reciprocating slide. A detent mechanism positioned within the camblock contacts a surface of a slide stop pin to hold the slide stop latch in place. The interior of the slide stop latch contains an elongated wire having an end that engages the frame such that the slide stop latch is biased in a down position.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 4, 2008
    Assignee: Sturm, Ruger & Co., Inc.
    Inventor: James McGarry
  • Patent number: 7337570
    Abstract: A camblock assembly with a camblock and a guide rod is employed in a firearm having a frame constructed of synthetic polymer material. The camblock has a front flange with flange surfaces that engage corresponding bearing surfaces of the frame to distribute forces and energy to the frame during recoil of the firearm. A shelf member is positioned at a front end of the camblock and a coiled flat wire buffer spring is positioned about the guide rod to resist movement of a reciprocating slide. A detent mechanism positioned within the camblock contacts a surface of a slide stop pin to hold the slide stop latch in place. The interior of the slide stop latch contains an elongated wire having an end that engages the frame such that the slide stop latch is biased in a down position.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 4, 2008
    Assignee: Sturm, Ruger & Co., Inc.
    Inventor: James McGarry
  • Patent number: 7103998
    Abstract: A camblock assembly with a camblock and a guide rod is employed in a firearm having a frame constructed of synthetic polymer material. The camblock has a front flange with flange surfaces that engage corresponding bearing surfaces of the frame to distribute forces and energy to the frame during recoil of the firearm. A shelf member is positioned at a front end of the camblock and a coiled flat wire buffer spring is positioned about the guide rod to resist movement of a reciprocating slide. A detent mechanism positioned within the camblock contacts a surface of a slide stop pin to hold the slide stop latch in place. The interior of the slide stop latch contains an elongated wire having an end that engages the frame such that the slide stop latch is biased in a down position.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: September 12, 2006
    Assignee: Sturm Ruger & Co., Inc.
    Inventor: James McGarry
  • Patent number: 6826997
    Abstract: A firearm according to this invention has a bed (21) formed in the front part of a frame (2) in which is crosswise situated a pin (22). In the rear part of a barrel (3) there is formed a recess (31) of a helical form having on its opposed side ground off unlocking recess (32). The barrel (3) can rotate round its longitudinal axis due to a recoil resulting in unlocking the barrel (3) and a bolt element (4). The firearm (1) has a trigger (51) with independently from each other suspended single-shot draw bar (52) with a single-shot protrusion (53) engaging into a single-shot groove (42) and a double-shot draw bar (58) with a double-shot protrusion (59), engaging into a double-shot groove (43), the protrusions of which lean against the bottom surface of the bolt element (4). The double-shot mode of a firearm (1) is put out of operation by means of a safety catch situated in the frame (2). A locking catch is formed in one pressed piece of sheet metal.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: December 7, 2004
    Assignee: Grand Power, s.r.o.
    Inventor: Jaroslav Kuracina
  • Patent number: 6543169
    Abstract: A semi-automatic firing and disconnecting device for a non-hammer fired machine. A first trigger member coupled to the weapon's firing pin and a second trigger member adapted for engagement by a user of the weapon move relative to one another from a first position, in which the trigger members are operably connected to one another, to a second position, in which the trigger members are not operably connected to one another, and back to the first position as a result of firing the weapon. The configuration of the second trigger member, upon the trigger members' returning to the first position from the second position, is altered so that the trigger members are not enabled to fire unless and until the user releases and reengages the second trigger member.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: April 8, 2003
    Inventor: Timothy S. Bero
  • Patent number: 6405631
    Abstract: A semi-automatic handgun is disclosed including a frame having a barrel housing mounted thereon. A barrel is movably mounted on the barrel housing and has a cartridge chamber at its rearward end for receiving a cartridge therein. The barrel is movable between a rearward position and a forward position with respect to the barrel housing and is normally in its rearward position. The barrel moves forwardly in a straight line from its rearward position upon firing of the cartridge in the chamber to counteract the rearward energy of discharge, thereby reducing recoil. The handgun may be fired in either a single action or double action manner. The firing hammer of the handgun is re-cocked, upon firing of the cartridge, by means of a movable piston having a firing pin positioned therein with the firing pin engaging the hammer to move the hammer to its re-cocked position.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: June 18, 2002
    Inventor: Robert C. Milek
  • Patent number: 6371004
    Abstract: A bore sighting assembly for accurately mounting a telescopic sight on a rifle or other firearm, with the sighting assembly utilizing a laser beam generator for creating a beam having a diameter of less than that of the bore, and with the light being directed axially through the bore onto a remote target. In addition to the laser generator, the bore sighting assembly includes a guide for controllably directing the beam from the generator through and along the axis of the bore for impingement onto a remote target. The guide includes eccentric bushings for adjustably positioning the laser generator in the receiver area of the rifle or firearm, and a beam control disc may be secured to the distal tip of the barrel for additional guidance and control of the laser beam.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: April 16, 2002
    Assignee: Stoney Point Products, Inc.
    Inventor: Thomas K. M. Peterson
  • Patent number: 6026728
    Abstract: A blank cartridge device is disclosed for use with a firearm having a flash reducer. The blank cartridge device includes a bushing defining a bore sized to receive the flash reducer. It also includes a block mounted within the busing bore and defining a blind hole disposed in substantial alignment with the barrel bore. In addition, the blank cartridge device includes a compression spring disposed within the bushing bore such that movement of the bushing from the released position to the locked position compresses the spring.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: February 22, 2000
    Assignee: Heckler & Koch GmbH
    Inventors: Manfred Guhring, Hermann Albrecht
  • Patent number: 5983772
    Abstract: The bolt of a blowback operated weapon is driven rearward by multiplying the area acted upon by pressurized gas generated by a subcaliber bulleted cartridge or a blank cartridge fired in a subcaliber barrel inserted into the weapon barrel and attached to the weapon barrel muzzle.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: November 16, 1999
    Inventors: George L. Reynolds, S. Paul Reynolds, John M. Miller
  • Patent number: 5829180
    Abstract: A semiautomatic pistol adapted to repetitively fire blank ammunition includes a frame, a barrel slidably mounted to the frame, a slide slidably mounted to the frame and adapted for reciprocal longitudinal movement relative to the frame between a forward battery position and a rearward position and an occlusion member at least partially positioned within a longitudinal bore defined in the barrel for generating sufficient back pressure in the barrel to move the slide rearwardly to the rearward position thereof. The occlusion member defines a length ranging from about 15% to about 60% the length of the barrel.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: November 3, 1998
    Inventor: Edward J. Leiter
  • Patent number: 5677505
    Abstract: A two part cartridge has a rearwardly recoiling inner piston and a choked orifice at its forward end to develop a blow-back thrust that will cycle a recoil operated automatic firearm. The piston operates by thrusting off the inner end wall of the firearm chamber in which the cartridge is loaded.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 14, 1997
    Inventor: William A. Dittrich
  • Patent number: 5675106
    Abstract: An automatic pistol adapted to repetitively fire blank ammunition includes a frame, a barrel unit supported by the frame and a slide unit reciprocally mounted on the frame between the forward and rear position. The barrel unit and/or frame incorporate structure which enables the pistol to operate in a highly reliable, repetitive manner without visible alteration to the pistol. A method for forming a blank firing pistol is also disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 7, 1997
    Inventor: Edward J. Leiter
  • Patent number: 5492063
    Abstract: A two part cartridge has a rearwardly recoiling inner piston and a choked orifice at its forward end to develop a blow-back thrust that will cycle a recoil operated automatic firearm. The piston itself may serve to contain propellant and preferably contains all propellant within the cartridge.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: February 20, 1996
    Assignees: SNC Industrial Technologies Inc., Les Technologies Industrielles SNC
    Inventor: William A. Dittrich
  • Patent number: 5463930
    Abstract: A weapon for firing practice ammunition includes a barrel having a frontal length portion terminating in a muzzle; an ammunition loading chamber at a barrel end opposite the muzzle; and a plurality of first gas outlet bores provided in the frontal length portion. The first gas outlet bores are arranged in a plurality of circumferentially spaced axial rows. There is further provided a muzzle brake sleeve coaxially surrounding the frontal length portion and having a frontal end situated close to the muzzle. The muzzle brake sleeve includes a plurality of second gas outlet bores arranged in a plurality of circumferentially spaced axial rows. The first gas outlet bores are staggered with respect to the second gas outlet bores as viewed along the barrel. The frontal end of the muzzle brake sleeve is closed off by a plug.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: November 7, 1995
    Assignee: Rheinmetall GmbH
    Inventors: Bernhard Bisping, Lothar Post
  • Patent number: 5448939
    Abstract: A firearm having a disconnector movable in two planes to disconnect the gun if the bolt moves rearward, disconnects the gun if the magazine box is removed and is the connecting member between the trigger and the sears. The firearm has a double sear both of which must be released from the firing pin carrier before the firing pin carrier can move into a firing mode. The firing pin carrier has an indicator visible to the operator to indicate whether or not the gun is in a firing mode. The magazine latch has an integral ejector and the barrel has projections between the magazine box is received to align the magazine box to the chamber mouth. Additionally, there is a firing pin retractor plunger in the bolt which separates the firing pin carrier from the bolt immediately after firing to enhance ejection of spent rounds.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: September 12, 1995
    Assignee: Remington Arms Company, Inc.
    Inventors: David Findlay, Sr., David S. Findlay, Floyd H. Smith
  • Patent number: 5438907
    Abstract: The weapon bolt is driven rearward by gas pressure from a blank cartridge with the reaction being transmitted to the weapon frame through a spigot inserted through the barrel and attached to the weapon muzzle. Power is thereby provided to perform cycling of the weapon.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: August 8, 1995
    Inventors: George L. Reynolds, John M. Miller
  • Patent number: 5433134
    Abstract: An automatic pistol for repetitively firing blank ammunition includes a frame, a barrel unit including a barrel chamber portion and a barrel element extending from the barrel chamber portion, and a slide mounted on the frame and reciprocally longitudinally moveable relative to the frame between a forward battery position where the pistol is capable of firing and a rearward position where a spent blank cartridge is ejected. The slide is initially freely moveable relative to the barrel unit to an engaging position of the slide displaced from the forward battery position. At the engaging position, the slide engaes an abutment surface of the barrel unit thereby moving the barrel unit to a position where the barrel chamber portion receives a blank cartridge. A mechanism, e.g., a restrictor element, may be provided for generating sufficient back pressure in the barrel unit upon firing of a blank cartridge to move the slide to the rearward position.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: July 18, 1995
    Inventor: Edward J. Leiter
  • Patent number: 5386659
    Abstract: A fire control mechanism for a firing pin striker operated semiautomatic double action handgun includes a sear pivotably disposed on a frame between forward and rearward positions. The sear includes an edge portion for controlling the firing pin and further includes a cam surface for downward displacement of the sear to release the firing pin in response to trigger firing movement. The firing pin includes an extension adapted to be in planar movement with the controlling edge of the sear with selective engagement and disengagement therewith in response to angular and translatory movement of the sear upon response to actuation of the trigger. A trigger bar includes a disconnect portion disposed to move the trigger bar downwardly upon recoil of the slide. The sear, firing pin extension, cam surface and trigger are all movable in coplanar relationship with one another and the trigger bar and disconnect are movable in a plane parallel thereto.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: February 7, 1995
    Assignee: Smith & Wesson Corp.
    Inventors: Pardip K. Vaid, Lee M. Lenkarski, Kevin G. Foley
  • Patent number: 5377438
    Abstract: A device for preventing the accidental discharge of a bullet from a firearm, including an attachment adapted to engage the muzzle end of a firearm barrel, a tubular body coaxially attachable with one of its ends to the barrel via the attachment, the bore of the tubular body is provided with an abutment, a stopper fixedly attachable to the other end of the body and having a central bore of a diameter exceeding the calibre of the firearm, an impact disk slidably disposed in the bore of the tubular body, and energy-absorbing and storing element interposed in the bore between the impact disk and the stopper. Upon the discharge of a bullet, the latter pierces the impact disk while transferring some of its kinetic energy to the energy-absorbing and storing element, causing the bullet to disintegrate into small particles escaping through the bore in the stopper.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: January 3, 1995
    Assignee: Etzion Metal Works
    Inventors: Naftali Sheinfeld, Michael Cohen
  • Patent number: 5373775
    Abstract: A firearm having a disconnector movable in two planes to disconnect the gun if the bolt moves rearward, disconnects the gun if the magazine box is removed and is the connecting member between the trigger and the sears. The firearm has a double sear both of which must be released from the firing pin carrier before the firing pin carrier can move into a firing mode. The firing pin carrier has an indicator visible to the operator to indicate whether or not the gun is in a firing mode. The magazine latch has an integral ejector and the barrel has projections between the magazine box is received to align the magazine box to the chamber mouth. Additionally, there is a firing pin retractor plunger in the bolt which separates the firing pin carrier from the bolt immediately after firing to enhance ejection of spent rounds.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: December 20, 1994
    Assignee: Remington Arms Company, Inc.
    Inventors: David Findlay, Sr., David S. Findlay, Floyd H. Smith
  • Patent number: 5320022
    Abstract: A method and apparatus are provided for reducing the recoil and muzzle climb from the discharge of a firearm. A hollow cylinder member having a front end with a restricted opening forming a gas chamber is attached to the muzzle end of a firearm and serves to rearwardly divert the highly pressurized gas produced from the combustion of gunpowder. The cylinder member is provided with rearwardly angled holes along both its top and bottom surface which act as jets to create a forward propulsive force from the expelled gas. This forward force counteracts and reduces the backward force of the firearm's recoil. By providing a greater ratio of top holes to bottom holes, thereby effecting a downward force greater than the upward force, muzzle climb can also be effectively reduced. The apparatus can be constructed for quick attachment to the muzzle of the firearm.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: June 14, 1994
    Assignee: Gunstar, Inc.
    Inventors: Jerold R. Kimbro, James P. Kimbro
  • Patent number: 5272957
    Abstract: A firearm (10) is provided which is light weight, safe and simple to operate. The firearm (10) comprises a bolt-barrel-receiver assembly (12), a grip assembly (14) and a magazine assembly (16). the bolt-barrel-receiver assembly (12) comprises a barrel assembly 41, a receiver assembly, (42) and a bolt assembly (44). The grip assembly (14) comprises a grip body (110) and a fire control assembly (112). Plastic is incorporated into the barrel assembly (41), the fire control assembly (112) and the grip body (110). The firearm (10) incorporates several safety features through a safety actuator (222) and a disconnect (148). These safety features include a surface (243) for blocking movement of a sear (120), a blocking surface (248) for blocking movement of the disconnect (148) and a hammer passage (246) allowing blocking of the hammer (118). Due to the design of the various assemblies, the firearm (10) is comparatively simple to disassemble for cleaning or repair.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: December 28, 1993
    Assignee: Ram-Line, Inc.
    Inventors: M. Gaines Chesnut, Ernest Brandenburg
  • Patent number: 5216195
    Abstract: The sear is rotatably supported in the frame of the firearm to rotate around an axis of rotation. The hammer is pivotally mounted in the frame to pivot around a pivot axis. The hammer includes a striking surface. The sear includes a blocking surface which cooperates with a resting surface of the hammer. The position of the blocking surface of the sear which is determined by its axis of rotation, the position of the striking surface of the hammer, which is determined by the location of the pivot axis of the hammer, and the position of the rear end of the firing pin are selected in such a manner that when the hammer is in its decocked position, in which position the resting surface contacts the blocking surface, the striking surface of the hammer is at a distance from the rear end of the firing pin. Accordingly, the hammer does not contact in its decocked state the firing pin such that eg upon a dropping of the firearm a shot may inadvertently be fired.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: June 1, 1993
    Assignee: ITM Industrial Technology & Machines AG
    Inventor: Martin Tuma
  • Patent number: 5157209
    Abstract: In a semi-automatic firearm is a simplified firing mechanism that includes a manual safety system and a doubly redundant automatic safety system. The firing mechanism includes a trigger, a trigger bar, a trigger lever, a firing pin safety, spring loaded striker with a firing pin, a sear, a dislocator and a manual safety. When the manual safety is in the safe position the striker is blocked and the trigger bar is disengaged from the sear and the dislocator. If the manual safety is in the firing position, but the trigger has not been fully released after each discharge, the trigger lever cannot move the firing pin safety out of the way of the striker, and the trigger bar cannot move the sear.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: October 20, 1992
    Inventor: Peter B. Dunn
  • Patent number: 5140893
    Abstract: A blank firing adapter having a particular configuration is installed in an automatic or semi-automatic firearm to increase back-pressure of propellant enabling the firearm to be efficiently operated with blank, or practice, ammunition.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: August 25, 1992
    Inventor: Edward J. Leiter
  • Patent number: 4932309
    Abstract: A trigger mechanism for a semi-automatic rifle in which a latch-disconnector hook member is mounted on the trigger member for engaging a catch on the transfer bar to temporarily hold the transfer bar down while the trigger is pulled and after the transfer bar has been depressed and thrust rearward by the rearward movement of the cocking lever to ensure the cocking of the firing pin as the bolt carrier moves over the transfer bar.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: June 12, 1990
    Inventor: Ronnie G. Barrett
  • Patent number: 4907489
    Abstract: A pistol configured to fire blank cartridges includes a modified barrel with a breech portion connected to an aligned inner sleeve. Around the inner sleeve, there is disposed an outer sleeve having a vent therein through which the cartridge discharges. The breech portion is connected to a barrel anchor to move backward in a slight arc when the pistol is fired. A spring retention rod projects from the barrel anchor and receives a shortened recoil spring therearound which recoil spring has one end abutting a stop on the barrel anchor and the other end in abutment with the end of a spring retaining cup. The spring retaining cup is engaged by a flange projecting from a slide so that when the pistol is fired, the slide moves rearwardly against the compression of the spring to eject the spent cartridge and then moves forwardly under the urging of the spring to load a fresh cartridge into the breech portion.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: March 13, 1990
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Tommy L. Teague
  • Patent number: 4893546
    Abstract: A pistol has a frame, a barrel slidable on the frame and having a cartridge-receiving rear end, and a breech slidable on the frame and engageable over the rear end of the barrel to form a cartridge chamber. A standard slide carries the barrel and breech. A firing element and a firing pin operatively linked thereto are movable on the breech toward and away from the barrel between a rear position in which the firing pin is out of the cartridge chamber and a front position with the firing pin projecting forward into the cartridge chamber for firing a cartridge in the chamber when the firing element moves from the rear to the front position. A relatively strong firing spring braced against the firing element urges same into the front position and a relatively weak spring braced against the firing element urges same into the rear position.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: January 16, 1990
    Inventor: Gaston Glock
  • Patent number: 4867039
    Abstract: A semiautomatic gun which can be used to fire two types of ammunition comprises first and second bolts and a selector assembly operated by a user of the gun. The selector assembly selectively permits loading and firing of one type of ammunition. The gun has only a single trigger for firing either of the bolts selected by the selector assembly and the gun may be a combination of a shotgun and rifle or any other desired configuration. Each of the bolts are movable in a forward and rearward direction when fired and have bolt lock-up bearings for preventing such movement at other times. A reciprocable forestock is provided with a forestock lock release. The forestock can be pumped by the operator to initially load a round of ammunition into the chamber selected by the selector assembly.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: September 19, 1989
    Assignee: Special Service Arms Mfg. Inc.
    Inventor: David R. Dobbins
  • Patent number: 4829877
    Abstract: An accessory for converting a small bore firearm into a safe theatrical stage prop providing both aural effects of the "report" of detonated gunpowder and visual effects of discharged "gunsmoke" and "recoil" motion imparted to the body of a user, is constructed with a central passage 20 partially obstructed by a dimensionally conforming cylindrical mass 36. Effluent in the form of expanding gases of detonated gunpowder enter central passage 20 via proximal orifice 16, impart forward motion in a preferred direction to cylindrical mass 36 and, as movement of mass 36 exposes connecting passages 30, the effluent bypasses the central portion of passage 20 via passages 22 and exits the barrel 10 of the accessory via distal orifice 18. Motion imparted to mass 36 first by the expanding effluent and then in a reverse direction by compressed spring 40, simulates the visual effect of "recoil" upon detonation of a blank cartridge of ammunition.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 16, 1989
    Inventor: James E. Zerega
  • Patent number: 4825744
    Abstract: A pistol has a frame, a barrel slidable on the frame and having a cartridge-receiving rear end, and a breech slidable on the frame and engageable over the rear end of the barrel to form a cartridge chamber. A standard slide carries the barrel and breech. A firing element and a firing pin operatively linked thereto are movable on the breech toward and away from the barrel between a rear position in which the firing pin is out of the cartridge chamber and a front position with the firing pin projecting forward into the cartridge chamber for firing a cartridge in the chamber when the firing element moves from the rear to the front position. A relatively strong firing spring braced against the firing element urges same into the front position and a relatively weak spring braced against the firing element urges same into the rear position.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: May 2, 1989
    Inventor: Gaston Glock
  • Patent number: 4685378
    Abstract: An attachment for a maching gun with automatic firing mechanism operated by barrel recoil has a tubular jacket positionable over the barrel. A rear end of the jacket is securable to the gun casing and its forward end surrounds the muzzle of the barrel. A restrictor screws into the forward end of the jacket and slides over the barrel muzzle to form a chamber between the muzzle and a transverse wall of the restrictor. Overpressure relief ports are formed in the transverse wall of the restrictor, and exhaust ports are located in the side wall. Gas pressure is built up in the chamber after a blank round has been fired to cause the barrel to recoil a sufficient amount to actuate the automatic firing mechanism. Once the barrel recoils past the exhaust ports, the gas pressure is released to stop the recoil motion. The recoil stroke and rate of fire are adjusted by adjusting the position of the restrictor in the jacket, to adjust the position of the exhaust ports.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: August 11, 1987
    Inventors: Norman E. Lusk, Ian J. Anderson
  • Patent number: 4646619
    Abstract: A singulating apparatus for a semiautomatic handgun is described comprising a spring member which extends from a sear in a cantilevered fashion for engagement by a sear actuating member when the sear actuating member is in a cocked position. When the sear actuating member is moved from its cocked position to a firing position by a pulling of a trigger member, the spring member is disengaged from the sear actuating member, significantly reducing the force necessary to discharge the firearm. The spring constant of the spring member is chosen to hold the sear in its cocked position after releasing a striker to discharge the firearm so as to prevent unintentional automatic operation. The sear is balanced and pivotally mounted in the firearm at its center of balance so as to prevent unintentional discharge of the firearm in the event that the firearm is dropped or struck by a sharp blow.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: March 3, 1987
    Inventor: Paul J. Sokolovsky
  • Patent number: 4589326
    Abstract: An automatic pistol is disclosed which is recoil-operated and has mechanical locking means. The locking action between the barrel casing and the breech member is effected by means of an amply dimensioned locking member pivotally supported within the breech member and participates in the movement thereof. Coupling means provided between the trigger lever and the striking lever are formed by crank-like means and are adapted to be controlled by corresponding control portions respectively provided on the trigger lever and the breech member or stock so that the striking lever will always move along the same distance whether the striking lever is manually cocked, cocked by the breech member, or cocked and released by pulling on the trigger. The disclosed pistol includes safety means and the pistol and safety means are operable easily and quickly with equal ease by both left-handers and right-handers.
    Type: Grant
    Filed: October 28, 1982
    Date of Patent: May 20, 1986
    Assignee: Technica Entwicklungsgesellschaft mbH & Co. KG
    Inventors: Alexander Kuckens, Willi Korth
  • Patent number: 4531446
    Abstract: An apparatus for converting an automatic firearm of high caliber including a frame, a receiver mounted on the frame, a barrel mounted on the receiver, a bolt disposed on the receiver telescopically moveable relative to the breech end of the barrel against the action of a recoil spring, and the bolt being controlled by a sear which is movable in response to the movement of the weapon trigger and a disconnect lever, to a low caliber automatic firearm is disclosed. The apparatus for conversion includes a frame disposed in the receiver of the firearm, a low mass bolt assembly including a bolt carrier, a bolt, and a sear foot disposed in sliding contact with the frame. A pivotable camming lever is attached to the frame and pivots in response to impact from the bolt carrier. The camming lever provides sufficient mechanical advantage to enable the forward impact of the low mass bolt assembly to depress the disconnect lever on the original weapon.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: July 30, 1985
    Inventor: Steven C. VanVoorhees
  • Patent number: 4516466
    Abstract: A gun mechanism for guns embodying safety mechanism. The mechansim includes a trigger, a sear, and a hammer in operative relationship. A disconnector member is carried by the trigger and is operative to disconnect the sear from the hammer for firing. An extending member extends from the bolt carrier to a position over the trigger mechanism. A link member is positioned between the extending member and the disconnector member and is operative to hold the disconnector member in an inactive position, that is, a safe position at all times unless the said extending member is in a fully forward closed and locked position of the bolt. A bolt carrier has a limited sliding relationship with the bolt which includes a bolt locking member. The carrier undergoes an initial movement before the bolt moves which operates the link member to the safe position, after which the bolt is unlocked for movement. Positive safety is provided in that the disconnector member is held inactive unless the bolt is fully closed and locked.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: May 14, 1985
    Assignee: Weatherby, Inc.
    Inventor: Fred Jennie