Locks Bolt Open Patents (Class 89/138)
  • Patent number: 10378838
    Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: August 13, 2019
    Assignee: Hush Puppy Project, LLC.
    Inventors: Edward Cameron Nind Hopkins, Claudio Salassa
  • Patent number: 10161712
    Abstract: A rifle stock assembly adapted to receive and support a bolt action rifle barreled receiver is disclosed. The assembly includes a rifle stock/chassis having an elongated recess and a cage removably fastened to the chassis in the recess to receive a bolt action rifle receiver therein. The assembly may also have a pair of magazine collets fastened to the bottom of the forward portion of the chassis defining a magazine well beneath the cage. Cages having different internal surface shapes may be utilized to accommodate different barreled receivers in the same rifle stock/chassis. Different magazine collets may also be utilized to accommodate different caliber magazines used with the different barreled receivers.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: December 25, 2018
    Assignee: J. ALLEN ENTERPRISES, INC.
    Inventor: Jeffrey Allen Jones
  • Patent number: 10018437
    Abstract: An improved firearm bolt catch assembly for the lower receiver of a firearm, the assembly having a lift arm that retains the bolt of the firearm in a retracted position after the cartridge magazine has been emptied, such that the firearm does not need to be re-racked when an empty magazine is removed and replaced with a full magazine. The lift arm is substantially C-shaped, having an elongated middle segment and a pair of transverse legs. Each of the transverse legs is pivotally mounted onto the lower receiver. The lift arm is raised by the magazine follower when the last cartridge has been discharged. An insert assembly is also disclosed.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: July 10, 2018
    Inventors: Darin M. Phipps, Rick W. VanVliet
  • Patent number: 10012463
    Abstract: A firearm magazine assisted release device is provided. The release device comprises a spring secured with or integrated into a firearm. The spring is biased when a magazine is locked into a firearm, such that when the magazine release button is pressed stored potential energy is released as expansive kinetic energy, ejecting the magazine from the firearm.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: July 3, 2018
    Inventors: John Richard Warnke, Samer Alkhalaileh
  • Patent number: 9777978
    Abstract: A rotational safety device for a firearm is provided that replaces a traditional cross bar safety device. The safety device is easier to operate and easier for a firearm user to assess whether the firearm can be fired than previous safety systems. The safety device of the present technology involves setting a safety to “fire” or to a no fire or “safety on” position by causing a safety member installed within a trigger mechanism to rotate about an axis. The safety device may include a recessed portion that may be rotationally positioned to face a trigger to allow the trigger to be completely depressed. The safety device may also include one or more locking positions in a range of rotation, physical limits on the range of rotation such as pins that engage surfaces of a firearm, and may be used with a variety devices to provide rotation.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: October 3, 2017
    Assignee: S2 LLC
    Inventors: Andrew Locher, Jason Jennings
  • Patent number: 9739558
    Abstract: A barrel assembly for use in a semiautomatic firearm, including a barrel and a takedown lever. A rear portion of the barrel includes a follower lug and a rear lug extending from an underside of the rear portion. The follower lug further includes a follower notch. A pin of the takedown lever includes a notch with a vertical face configured to contact a vertical face of the follower notch when the firearm is in the locked position. The rear lug is configured to be supported by a portion of a locking block of the firearm prior to firing and during a portion of the recoil period. The modifications to the barrel assembly result in increased dwell time and accuracy of the firearm.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: August 22, 2017
    Assignee: Apex Tactical Specialties, Inc.
    Inventor: Randall M. Lee
  • Patent number: 9719742
    Abstract: For use on a firearm having a removable ammunition magazine, a longitudinally reciprocating bolt, and a pivoting bolt catch member, the present invention provides an empty ammunition magazine bolt hold open mechanism having a longitudinally extending axel pivotally mounted to the firearm for rotation about a longitudinal axis. The axel has a forward lever arm that extends transversely from the axis and is positioned to be engaged by a magazine follower when the magazine is empty of ammunition. Displacement of the forward lever arm causes rotation of the axel. The axel has a rear portion configured to engage the bolt catch and cause pivotal movement of the bolt catch member when the axel is rotated.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: August 1, 2017
    Inventor: Bryan Zeman
  • Patent number: 9651326
    Abstract: The invention relates to a firearm comprising a housing (1), a magazine (2) for cartridges (3) which are preloaded in the direction of a transfer opening by means of a magazine feeder (7), a lock (8) which can be moved relative to the housing (1) in order to convey the cartridges (3), and a lock catch lever (4) which holds the lock (8) in a rear position when the magazine (2) is empty. A trigger element (9) is provided for automatically releasing the lock (8) into the front position when a loaded magazine (2) is inserted. An engagement surface (10) of the trigger element (9) protrudes into the movement path of a control surface (11) of the magazine (2) in a front starting position. The trigger element (9) is coupled to the lock (8) in a kinematic manner via an effective surface (12) at least during a part of the movement when moving from the front starting position into a rear end position.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: May 16, 2017
    Inventor: Rene Weilharter
  • Patent number: 9631885
    Abstract: A rifle stock assembly adapted to receive and support a bolt action rifle barreled receiver is disclosed. The assembly includes a rifle stock/chassis having an elongated recess and a cage removably fastened to the chassis in the recess to receive a bolt action rifle receiver therein. The assembly may also have a pair of magazine collets fastened to the bottom of the forward portion of the chassis defining a magazine well beneath the cage. Cages having different internal surface shapes may be utilized to accommodate different barreled receivers in the same rifle stock/chassis. Different magazine collets may also be utilized to accommodate different caliber magazines used with the different barreled receivers.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: April 25, 2017
    Assignee: J. Allen Enterprises, Inc.
    Inventor: Jeffrey Allen Jones
  • Patent number: 9568263
    Abstract: A handgun includes a locking mechanism disposed within a thickness of a grip, the locking mechanism being configured to engage with a lever associated with a slider and a magazine carried within a cavity formed by the grip; and a spring-loaded lock pivotally attached to the frame and configured to engage with a lip on a side surface of the slider, the spring-loaded lock being configured to secure the slide in a fixed position when engaged with the lip. A method includes disengaging the magazine after all bullets therein are used via the locking mechanism; and releasing the slide as the new loaded magazine is placed in the cavity of the grip via the spring-loaded lock.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: February 14, 2017
    Inventor: Daniel G. O'Kelly
  • Patent number: 9429377
    Abstract: A firearm magazine assisted release device is provided. The release device comprises an external spring and method of securing that spring to the magazine. The spring is biased when the magazine is locked into a firearm, such that when the magazine release button is pressed stored potential energy is released as expansive kinetic energy, ejecting the magazine from the firearm.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: August 30, 2016
    Inventors: Samer Alkhalaileh, John Richard Warnke
  • Patent number: 9279629
    Abstract: An improved M1911 pistol, method of making an improved M1911 pistol, and system for improving performance of an M1911 pistol. Replacement parts for the M1911 pistol include stainless steel, which may be a 17-4Ph metal. Improved replacement parts include an improved frame and an improved slide.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: March 8, 2016
    Inventor: Norman Anthony Bellione
  • Patent number: 9194652
    Abstract: A rifle is provided. The rifle comprises a barrel, a handguard partly axially surrounding the barrel, and a modular accessory system. The modular accessory system comprises a housing and a modular accessory support system positioned within the housing, wherein the support system includes at least two modular accessory slots. The modular accessory system also comprises a modular accessory removably secured and individually adjustable within each slot. The housing partly axially surrounds the barrel and is positioned axially adjacent to the handguard such that a combination of the handguard and the housing surrounds the barrel completely in an axial manner. Support system configurations of preferably either tray-type or platform-type may be contemplated. The modular accessory system may further comprise a common power source and a display system. A modular accessory system for rifles capable of exchangeably mounting accessories thereto in plug-and-play fashion is therefore achieved.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: November 24, 2015
    Inventor: Matthew J. Esserman
  • Patent number: 9157695
    Abstract: An air gun includes a compression tube defining a compression chamber. A gas spring assembly is disposed within the compression chamber, and includes a piston that defines an interior pressure chamber. The piston includes a latch bushing that is disposed adjacent a rearward end of the bushing. The latch bushing defines a central bore that extends along and is concentric with a longitudinal axis of the piston. A guide rod is slideably supported within the central bore of the latch bushing. The piston is axially moveable along the longitudinal axis relative to the guide rod, between a compressed position and an un-compressed position. The guide rod includes a first end that engages the trigger assembly in abutting engagement, and a second end that is disposed within the interior pressure chamber of the piston. The latch bushing includes a ledge for engaging a sear of the trigger assembly in latching engagement.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: October 13, 2015
    Inventor: Thomas Gore
  • Patent number: 9091499
    Abstract: A bolt hold open (BHOA) catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. A BHOA housing is supported upon the lower receiver in communication with a receiver chamber in communication with a bolt assembly. A catch is supported in elevatable fashion relative to an end of the actuator housing and an end most and downward extending structural portion of the elevatable catch is capable of being manipulated by an externally configured and toggled bolt catch so that an inner pivoting end portion thereof engages the structural portion to raise the BHOA supported catch into contact with a forwardly traveling bolt, such as upon release of a previously retracted charging handle. The BHOA catch can alternatively be actuated upwardly by a suitably configured follower associated with an attachable and cartridge holding magazine, this again following a last shot hold open protocol.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: July 28, 2015
    Assignee: 22 Evolution LLC
    Inventors: John L. Overstreet, Jordan Bowles, Tyson Bradshaw, Craig Pudil
  • Patent number: 9057574
    Abstract: A pistol thumb safety that is capable of being coupled to a frame of a pistol, the thumb safety including a safety body adapted to be movably mounted to the frame so that the body is movable between firing and safe positions. The safety body includes an outer side surface, an inner side surface, and a top portion. A blocking feature is formed along the top portion of the safety body, wherein the blocking portion engages the slide of the pistol when the safety body is in its safe position. As a result, the slide is movable along the safety body for clearing the chamber of the pistol while the safety body is maintained in its safe position.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 16, 2015
    Assignee: RA Brands, L.L.C.
    Inventor: Peter McClave
  • Patent number: 8985005
    Abstract: A mechanism for a repeating firearm has a body pivotably mounted within the receiver and movable between a first position where it blocks motion of the bolt carrier, and a second position where it engages either the trigger or the hammer to prevent discharge. In operation the body is moved from the first position to the second to release the bolt carrier, which moves into battery. The body is then allowed to move out of the second position toward the first position. The rife may be discharged by a pull of the trigger, and the bolt carrier moves out of battery and is arrested by the body before moving back to battery. If the body is maintained in the second position during operation its engagement with the trigger or hammer prevents discharge of the firearm.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 24, 2015
    Assignee: Smith & Wesson Corp.
    Inventors: Jason Dubois, David S. Findlay
  • Patent number: 8695477
    Abstract: An assembly for a bolt catch on a firearm having a bolt that slides between a latched position and an unlatched position, the bolt held in the latched position by a bolt catch mechanism that includes a catch-release actuator pivotally mounted on the rifle to provide for latching and unlatching of the bolt by a user, the assembly including a lever having an L-shaped body that comprises a first leg and a second leg that is formed at substantially a right angle to the first leg, the first leg having a free end on which is formed a mounting member; and a clamp member structured to attach to the mounting member on the lever to enable clamping of the lever to the catch-release actuator in a manner that does not require disassembly of the firearm or disassembly or removal of the catch-release actuator from the firearm.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: April 15, 2014
    Assignee: Tactical Link, Inc.
    Inventor: Brian Esch
  • Publication number: 20140060310
    Abstract: A bolt hold open (BHOA) catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. A BHOA housing is supported upon the lower receiver in communication with a receiver chamber in communication with a bolt assembly. A catch is supported in elevatable fashion relative to an end of the actuator housing and an end most and downward extending structural portion of the elevatable catch is capable of being manipulated by an externally configured and toggled bolt catch so that an inner pivoting end portion thereof engages the structural portion to raise the BHOA supported catch into contact with a forwardly traveling bolt, such as upon release of a previously retracted charging handle. The BHOA catch can alternatively be actuated upwardly by a suitably configured follower associated with an attachable and cartridge holding magazine, this again following a last shot hold open protocol.
    Type: Application
    Filed: March 7, 2013
    Publication date: March 6, 2014
    Applicant: 22 EVOLUTION LLC
    Inventor: 22 EVOLUTION LLC
  • Patent number: 8572875
    Abstract: A firearm-magazine interface for replacing an existing firearm-magazine interface of many existing firearms such as assault rifles, namely AK series (AK74, AK47, etc.) provides a lock that holds open the bolt after a last round is fired from a magazine. The firearm-magazine interface also includes a single-button magazine eject. After firing the last round, a bolt-hold lock is urged upwardly in the path of the returning bolt and catches a face of the bolt, thereby locking the bolt open until the magazine is replaced with a replacement magazine, at which time a bolt-hold release paddle pulls the bolt-hold lock downwardly, releasing the bolt to chamber a first round from the replacement magazine.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: November 5, 2013
    Inventor: Chase B. Sisgold
  • Patent number: 8327749
    Abstract: Embodiments of the present invention provide firearm receiver with ambidextrous features. Some of these features include a bolt-locking mechanism on a firearm receiver that is configured to allow an operator to clear jams while maintaining hold of a firing grip. The bolt-locking mechanism may include a linking mechanism configured to manipulate a bolt-catch device in response to activation of a magazine release button on a firearm receiver. Other features include an ambidextrous magazine release mechanism on a firearm receiver that is configured to allow an operator to release an inserted magazine while maintaining hold of a firing grip with either hand. The magazine release mechanism may include a linking mechanism configured to manipulate a magazine catch device in response to activation of either a right-handed magazine release button or a left-handed magazine release lever that pivots on an external fulcrum on a firearm receiver.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 11, 2012
    Inventor: Joshua A. Underwood
  • Patent number: 8225705
    Abstract: Automatic firearm with firing mode selector (6) to change the firing mode from automatic firing mode to semi-automatic firing mode, where the firearm (1) is equipped with a firing mechanism (11) with selection control (37) which enables the firearm (1) to function in closed bolt firing mode or open bolt firing mode, and in automatic firing mode as well as semi-automatic firing mode in both closed and open bolt firing mode.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: July 24, 2012
    Assignee: FN Herstal, S.A.
    Inventors: Michael Dubois, Xavier Robert Paul Gavage, Pascal Marcel Henri Denis Franssen
  • Publication number: 20120073429
    Abstract: A combination magazine and outer skin for a firearm including a magazine core adapted to releasably engage a firearm in communication with an action assembly associated with the firearm. Multiple cores are stackable end-to-end to define a continuous interior, with an end cap engaging an open bottom of a lowermost core. A design indicia exhibits an interior recess and is assembled around the stacked cores. A dual use follower is in use with an uppermost located magazine and maintains the assembly bolt in an open position and following the last cartridge being fired until such time as the magazine is removed. In the further variant, with a BHOA installed in place, the follower activates the BHOA and the bolt to remain in the retracted/open position, following magazine removal.
    Type: Application
    Filed: November 16, 2011
    Publication date: March 29, 2012
    Applicant: CMMG, INC.
    Inventors: Jordan Bowles, John L. Overstreet
  • Publication number: 20110247483
    Abstract: A bolt catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. The assembly includes a bolt catch actuator housing supported in seating fashion relative to the receiving chamber and communicating with an attachable magazine. A catch actuator is supported in elevatable fashion relative to an end of the actuator housing. A bolt catch component and integrally formed actuator catch engaging portion is slaved to the catch actuator in order to be displaced in response to elevating motion exerted upon the catch actuator, such as by a follower component biasingly disposed within the magazine. The follower, in its uppermost displaced position within the attached magazine, engages a tab associated with the catch actuator which extends over a communicating interior of the bolt catch actuator housing in communicating alignment with the exposed receiving chamber.
    Type: Application
    Filed: January 10, 2011
    Publication date: October 13, 2011
    Applicant: CMMG, Inc.
    Inventors: John L. Overstreet, Jordan Bowles, Tyson Bradshaw, Craig Pudil
  • Publication number: 20110247482
    Abstract: A bolt catch assembly for use with a firearm including a receiver with an exposed receiving chamber and an underside engageable magazine. The assembly includes a bolt catch actuator housing supported in seating fashion relative to the receiving chamber and communicating with an attachable magazine. A catch actuator is supported in elevatable fashion relative to an end of the actuator housing. A follower component is upwardly and biasingly disposed within the magazine and which, upon contacting the catch actuator, displaces an associated bolt catch of the firearm in an upper and bolt restraining position.
    Type: Application
    Filed: January 7, 2011
    Publication date: October 13, 2011
    Applicant: CMMG, INC.
    Inventors: John L. Overstreet, Jordan Bowles, Tyson Bradshaw, Craig Pudil
  • Patent number: 8015742
    Abstract: A firearm includes a receiver, a lower receiver, a magazine supported by a magazine catch, a grip, a bolt and a bolt-slide, and a slide catch lever. The bolt and bolt-slide are moveable during the firing procedure of a shot. The slide catch lever automatically blocks the bolt-slide when the magazine is empty. The firearm also includes a moveable ergonomic control group that includes a control button to eject the magazine and activate the slide catch lever. The moveable ergonomic control group also includes a vertical rod, which extends above from the button as far as the slide catch lever. The moveable ergonomic control group is manually activated by the user with the same hand holding the grip.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: September 13, 2011
    Assignee: Fabbrica D'Armi Pietro Beretta S.p.A.
    Inventor: Ulrich Zedrosser
  • Patent number: 7806039
    Abstract: A firearm has a frame with a barrel connected to the frame and defining a barrel axis. The barrel has a rear end defining a chamber, and a bolt assembly reciprocates with respect to the chamber between a closed position adjacent the chamber, and an open position away from the chamber. A fire control assembly includes a trigger and a selector switch with a semi-automatic position and a fully-automatic position. The fire control assembly includes a bolt assembly sear operably engaging the bolt. The fire control assembly operates when the selector switch is in the semi-automatic position in response to pulling the trigger to discharge the firearm, to load a cartridge, and to position the bolt in the closed position. The fire control assembly operates when the selector switch is in the fully-automatic position in response to pulling the trigger to discharge the firearm, and to hold the bolt in the open position.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: October 5, 2010
    Assignee: LWRC International, LLC
    Inventor: Jesus S Gomez
  • Publication number: 20100236394
    Abstract: A firearm has a frame with a barrel connected to the frame and defining a barrel axis. The barrel has a rear end defining a chamber, and a bolt assembly reciprocates with respect to the chamber between a closed position adjacent the chamber, and an open position away from the chamber. A fire control assembly includes a trigger and a selector switch with a semi-automatic position and a fully-automatic position. The fire control assembly includes a bolt assembly sear operably engaging the bolt. The fire control assembly operates when the selector switch is in the semi-automatic position in response to pulling the trigger to discharge the firearm, to load a cartridge, and to position the bolt in the closed position. The fire control assembly operates when the selector switch is in the fully-automatic position in response to pulling the trigger to discharge the firearm, and to hold the bolt in the open position.
    Type: Application
    Filed: July 5, 2007
    Publication date: September 23, 2010
    Inventor: Jesus S. Gomez
  • Patent number: 7735410
    Abstract: An improved bolt carrier for a firearm is provided that improves the overall reliability and performance of the firearm bolt assembly. The bolt carrier includes a bolt with a body having a number of lugs extending therefrom. The bolt includes an extractor recess sized and configured to avoid any undercut of the lugs adjacent the recess. The bolt also includes an extractor pivotably engaged in a recess formed in the bolt. The extractor has a pair nipples on flanges configured to engage a pair of integrally buffered springs disposed on a tapered spring well on either side of a firing pin bore extending through the bolt.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: June 15, 2010
    Inventor: Robert Bernard Iredale Clark
  • Patent number: 7661219
    Abstract: An ambidextrous bolt catch device, apparatus, system and methods for using are provided. Four main components include a bolt catch finger, lever system and plunger rod assembly with torsion spring. The lever system includes a right release lever and a left release lever; the left lever is an integral part of the bolt catch finger. The plunger rod assembly abuts and connects the right and left levers; a torsion spring on the rod creates tension causing rotation of the bolt catch finger in a downward or upward position. In an upward position, the bolt catch finger engages the bolt, retains the bolt in a rearward position, and signals the operator that the magazine is empty. The bolt engaged by the finger is held rearward in a safe, reliable manner to allow an unobstructed view of the firearm chamber until manually released using either the right or left release lever.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: February 16, 2010
    Assignee: Knights Armament Company
    Inventors: C. Reed Knight, Jr., Matthew A Callaghan
  • Patent number: 7596900
    Abstract: A multi-caliber ambidextrously controlled firearm that includes an adjustable ejection system to facilitate the ejection of spent cartridge casings from a firearm. The adjustable ejection system includes an ejection port defined by an aperture in the firearm and a deflector. The deflector is attached to the firearm to adjust the size of the ejection port and may be attached at one of at least two attachment positions of the firearm. The adjustable ejector system includes an ejector selectively attached to the firearm at one of at least two ejector attachment positions. The improved firearm also includes an ambidextrous magazine catch system for selectively retaining a magazine within a firearm. The magazine catch system includes a first button opposite a second button such that either button may be actuated by a user to release the magazine retained with the firearm.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: October 6, 2009
    Assignee: RMDI, L.L.C.
    Inventors: Alexander J. Robinson, Darin G. Nebeker, Jon C. Holway
  • Publication number: 20080092733
    Abstract: An improved bolt carrier for a firearm is provided that improves the overall reliability and performance of the firearm bolt assembly. The bolt carrier includes a bolt with a body having a number of lugs extending therefrom. The bolt includes an extractor recess sized and configured to avoid any undercut of the lugs adjacent the recess. The bolt also includes an extractor pivotably engaged in a recess formed in the bolt. The extractor has a pair nipples on flanges configured to engage a pair of integrally buffered springs disposed on a tapered spring well on either side of a firing pin bore extending through the bolt.
    Type: Application
    Filed: October 20, 2006
    Publication date: April 24, 2008
    Inventors: Paul Leitner-Wise, Robert Bernard Iredale Clark, Jesse S. Gomez
  • Patent number: 7293385
    Abstract: A module housing is adapted to be inserted into an operating position in the trigger group receiving area of a firearm. The module housing includes at least one pin receiver defined by two openings formed in the module housing, one on each lateral side of the housing. A module pin is received in the pin receiver and at least one trigger group component is mounted or supported for rotation on the module pin. The pin receiver is located on the module housing so as to align with a pin receptacle of the firearm when the module housing is in the operating position. By locating the pin receiver in the module housing so as to align with a corresponding pin receptacle of the firearm when the module housing is in the operating position, the trigger group module and the trigger group components housed in the module housing may be readily supported by the OEM pin receptacle.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: November 13, 2007
    Inventor: Michael L. McCormick
  • Patent number: 7261029
    Abstract: A firearm bolt locking mechanism includes a locking pin in the bolt carrier of a firearm like an AK-47 assault rifle or variant thereof. The locking pin is normally urged from the bolt carrier by a compressed spring. The mechanism also includes a pivot arm mounted on the receiver cover of the firearm. The pivot arm has a spring-biased finger that normally fills a hole in the receiver cover. The mechanism further includes a magazine that stops the bolt of the firearm when the last cartridge from the magazine is fired and permits the spring to drive the locking pin into the hole. After replacing the empty magazine with a full one, the pivot arm is pressed to replace the locking pin in the hole with the finger and to release the bolt carrier to chamber a cartridge.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: August 28, 2007
    Inventor: Douglas P. Davis
  • Patent number: 6871437
    Abstract: A method for locking a firearm in an “open” position involves blocking some portion of the firearm's action (internal operational mechanism) with a selectively-extendable locking device accessible from outside the firearm. More specifically, the locking device is positioned at one of a plurality of pre-selected locations on the firearm, and includes a plunger that lies retracted when the device is unlocked, and that extends into the interior of the firearm when locked. The pre-selected location is chosen such that: (i) when locked, the locking device interferes with the firearm's action, preventing it from being closed, and the firearm from being fired; (ii) the locking device can only be locked when the firearm's action is in an open position, with the chamber visually exposed; and (iii) to the extent one is able to operatively disassemble the firearm when the locking device is locked, the locking device cannot be defeated internally.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: March 29, 2005
    Assignee: O.F. Mossberg & Sons, Inc.
    Inventors: Joseph H. Bartozzi, Robert A. Talboot, Wayne E. Hopkins
  • Patent number: 6851346
    Abstract: A bolt catch assembly including a bolt engagement leg, a sliding member engagement leg, a contact member and an arrangement for enabling the bolt catch assembly to pivot about a pivot axis. The bolt engagement leg is configured for engaging a bolt of a firearm to hold the bolt in an open position. The sliding member engagement leg is connected to the bolt engagement leg. The contact member resiliently mounted on the sliding member engagement leg. The contact member is configured for being displaced between a static position and a displaced position whereby a catch engagement force is generated in response to the contact member being moved from the static position toward the displaced position. The arrangement for enabling the bolt catch assembly to pivot is disposed between the bolt engagement leg and the sliding member engagement leg thereby enabling the bolt engagement leg and the sliding member engagement leg to be pivoted in unison about the pivot axis of the bolt catch assembly.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: February 8, 2005
    Inventor: Geoffrey A. Herring
  • Patent number: 6510778
    Abstract: The present invention relates to an automatic bolt hold-open rotating assembly to convert a manual bolt hold-open function to an automatic bolt hold-open function in automatic and semi-automatic pistols and rifles, such as the Ruger 10/22 semi-automatic .22 caliber rifle. The components of the assembly readily replace standard factory components in the trigger assembly and replace the standard magazine. The assembly comprises a magazine with channel cutout, a bolt stop, a bolt stop handle for manual manipulation of the assembly, a bolt stop spring to apply clockwise pressure on assembly, a cartridge detecting lever which also serves as a cartridge ejector pivotably mounted on bolt stop with an extension which interfaces with channel cutout of magazine, a tab protruding from the ejector lever which rides in a slot on the bolt stop to limit pivoting of the cartridge detecting lever, and a lever spring allowing counter-clockwise pivoting of cartridge detecting lever to facilitate insertion of recharged magazine.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: January 28, 2003
    Assignee: Custom Shooting Technologies, Inc.
    Inventor: Michael B. Irwin
  • Patent number: 6431045
    Abstract: A device is disclosed for a weapon for firing burst of several shots. The device unlocks and latches the rifle bolt in the rear position to avoid heat distribution from the chamber or barrel to the powder or explosives in the booster charge or the explosive projectile, and to prevent firing by emptying or handling the weapon. The activator moves the trigger into engagement with the stop flap of the rifle bolt, thereby releasing the spring force of the rifle bolt forwardly during firing only when the rifle bolt and the cover are in the locked position.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: August 13, 2002
    Assignee: Vinghogs Mek. Verksted AS
    Inventor: Oddbjorn Eken
  • Patent number: 5835978
    Abstract: A shoulder-launched multiple-purpose assault weapon having a modified spotter rifle with a top-mounted rocket launcher tube is provided. The spotter rifle forms the base structure of the weapon and all weapon controls are located on the spotter rifle. The spotter rifle has several dual-function mechanisms which perform the combined functions of assembly and safing, bolt-locking back and cartridge ejecting, simultaneous adjustment of both open and optical sights, firing, selectively, of both the spotter round and the rocket round. The combination of these dual-firing mechanisms provides a lighter weight, better-balanced and smaller weapon. The reduction in parts count improves reliability and lowers cost. Other improved features include an adjustable spotter rifle barrel used to match the boresight of the rocket tube and an improved locking mechanism. A dual function trigger assembly operated two sears from a single trigger.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: November 10, 1998
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Michael M. Canaday, Fred W. Watson, Jr.
  • Patent number: 5608981
    Abstract: A combination bolt lock and cartridge ejector mechanism for a small arm is rovided. The mechanism has a hollow cylindrical bolt lock having slots cut through the cylinder and having beveled shoulder on the bolt engaging end. The cartridge ejector is also slotted and fits inside the hollow bolt lock. A single spring inside the bolt lock operates both the bolt lock and the cartridge ejector. A retaining pin secures the mechanism together and provides a means for attaching the mechanism to a receiver of a small arm.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: March 11, 1997
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Michael M. Canaday
  • Patent number: 5473834
    Abstract: The firearm comprises a manual control (13) for deactivation of the retainer of a cartridge magazine (8) by release of a tooth (16) from a notch (17) of the magazine and a device for the automatic ejection of the magazine. The automatic ejection device comprises a finger (25) for the actuation of the tooth (16), which is integral with the cartridge elevator piston (19) of the cartridge magazine (8), to come against the retainer of the latter and cause its ejection before the end of the elevation stroke of the cartridge elevator piston during the chambering of the last cartridge (12) under the thrust of the spring (20) of this piston against an activation spring (18) of the retainer. After the ejection of the empty cartridge, the retainer (13) is again activated by its spring (18) and, during the replacement of this magazine, a cartridge (12) is thus chambered and the firearm is ready to fire.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: December 12, 1995
    Assignee: Marianne Bammate
    Inventor: Timour Bammate
  • Patent number: 5131317
    Abstract: A semi-automatic or automatic pistol of the kind that has a slide catch, having an automatic slide catch release mechanism located within the magazine chamber and comprising:i) a first bar adapted for reciprocation in longitudinal direction and biased into the uppermost position, comprising near the upper end means for pulling the lever from the slide engaging to the slide releasing position;ii) a second bar normally aligned with said first bar, adapted to reciprocate longitudinally and fitted near its distal end with motion transmission means;iii) a resilient link linking said first and second bars whereby an additional degree of freedom is imparted to the latter to be swingable out of alignment with said first bar;iv) an actuator member reciprocable between upper and lower positions and which in the lower position projects partly out of the magazine chamber, there being provided stop means for arresting the actuator in its lower position; andv) a swingable pawl pivoted intermediary between two end portions
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: July 21, 1992
    Assignee: Israeli Military Industries, Ltd.
    Inventor: Yehuda Meller
  • Patent number: 5085123
    Abstract: A device used especially in a large caliber weapon for controlling the train of motion of an ammunition unit during the ramming thereof in the weapon, and of the case of the ammunition unit on firing of the gun includes an impact arrangement which upon ramming of the ammunition unit enter into interaction with and retard the ammunition unit. An energy storing device is chargeable through the impact with kinetic energy existing in the retarding ammunition unit. In response to energy transmitted from the energy storing device the closing of the breech block is activated. The breech block in the closed position retains the case of the ammunition unit during the firing and during a predetermined portion of the rearwardly directed movement in the gun effected on firing. The impact arrangement includes an impact member interactable with a flange on the case and displaceable in the longitudinal direction of the gun, and an impact spring means interactable with the impact member and with an impact piston.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: February 4, 1992
    Assignee: Aktiebolaget Bofors
    Inventors: Ulf Rossel, Mats Karlsson, Johan Ternsjo
  • Patent number: 4681020
    Abstract: An automatic firearm such as an automatic pistol having a slide and a thumb-engageable control on each side of the firearm for selectively securing the slide in retracted, inoperative position. This permits the firearm to be operated with equal facility and speed by either a right-handed or a left-handed marksman. A detent for retaining the slide in retracted position is mounted within the frame of the firearm for selective cooperation with a latch. A cross pin mounted for oscillation in the frame of the firearm has a lever mounting the detent fixedly connected thereto. Fixedly connected to one end of the pin outwardly of the frame of the firearm on a first side thereof there is a radially extending first detent control arm. On the other, second end of the pin, on the other side of the frame there is removably attached a second detent control arm, preferably identical with the first control arm, and disposed in the same angular position with respect to the pin.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: July 21, 1987
    Assignee: Agrozet, koncernovy podnik
    Inventor: Vaclav Polanecky
  • Patent number: 4664015
    Abstract: A gun which has an improved firing mechanism which enables it to be completely automatic through ejection of the magazine by eliminating the need for a selector switch. The firing mechanism has a substantially J-shaped hammer with a sear embedded therein. The sear is shaped, preferably hemispherically, at its framework end so that it will fall into a recess in the framework during the firing cycle. The draglink has a curved upper surface which is preferably concave or bowl-shaped. An associated magazine follower has a cam at its front center for tripping a release latch.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: May 12, 1987
    Inventor: Joseph E. Kennedy
  • Patent number: 4594935
    Abstract: In a locked-breech, short recoil, pistol type fire arm, the breech block slide (B) is provided with a separate locking block (E) engageable with both the barrel (C) and the slide (B) and accommodated between the underside of the barrel (C) and the upper surface of a movable trigger guard (D). Hold open means (X) are provided operable in the absence of cartridges in a magazine (T) or in the breech to allow the slide (B) to be held in the fully retracted position and simultaneously to release the trigger guard (D) for limited forward and downward movement, the trigger guard being provided with means which on movement of the trigger guard cause the locking block (E) to disengage from the barrel, whereby the barrel can be removed without the need for further disassembly of the fire arm.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: June 17, 1986
    Inventor: David E. Smith
  • Patent number: 4589327
    Abstract: A safety catch for a self-loading pistol type fire arm is provided with a safety catch comprising an arbor (HH) rotatable in the fire arm frame (A) by means of manual levers (HH2 and JJ2) mounted outside the frame on either side. From a rest or off position, in which the fire arm can be fired, the arbor can be rotated upwardly to an end position in which means on the arbor engage the hammer (J) when it is in either the cocked or uncocked position, to lock it against rotation and thus prevent the pistol being fired. Additionally, when the hammer is cocked, the arbor can be rotated in the opposite direction, in which case it causes rotation of a detent member (LL) which lifts the ejector (L) to engage and hold the firing pin and to retract the end (S2) of the firing pin (S) struck by the hammer (J) within the slide (B) and thereafter to trip the sear (K) to release the hammer (J) safely from the cocked to the uncocked position.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: May 20, 1986
    Inventor: David E. Smith
  • Patent number: 4549465
    Abstract: Disclosed is a slide stop assembly for a handgun including a slide stop pivotal from an inoperative position into a position engaging the slide when the latter is in a recoiled position. A generally flat, shallow V-shaped, side plate is secured along one side of the frame against rotation or rocking movement. The securement is effected by engagement of the side plate at spaced points therealong with the respective hammer and sear pins of the handgun. One leg of the side plate extends forwardly and terminates in a tab. A spring biased plunger on the slide stop engages the tab to preclude inadvertent pivoting of the slide stop from its inoperative detented position into its slide stop position.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: October 29, 1985
    Assignee: Bangor Punta Corporation
    Inventor: Dwayne Charron
  • Patent number: 4481863
    Abstract: A self-loading firearm or pistol has an operating lever which can be actuated by the thumb of the shooting hand in order to release the hammer from its cocked position as well as to release the breech mechanism retaining the block in an open position. The operating lever comprises two operating lever members, each of which is disposed on one side of the firearm and both lever members are rigidly and firmly interconnected such that one of the operating lever members can be actuated by the thumb of the shooter's hand whether it is the right hand or the left hand.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: November 13, 1984
    Assignee: Carl Walther GmbH
    Inventors: Georg Zanner, Otto Repa
  • Patent number: 4455919
    Abstract: Action disabling device in a firearm having among its conventional components a spring-closed breech bolt, a tubular magazine, and a pivoted cartridge lifter. The disabling device is in the form of an operating arm pivoted with one end to a fixed part of the action so as to be swingable with its other end into active and inactive positions in which the same is in and out, respectively, of the closing path of the breech bolt, and is normally spring-urged into its inactive position, with this operating arm being, on overtravel of the lifter in lift direction for lack of a cartridge thereon, engaged and taken along by the lifter into its active position to stop the breech bolt on partial closure of the same. The operating arm is one of the arms of a double-arm lever the other arm of which projects to the outside of the receiver and is there accessible to an operator's finger for swinging the operating arm to its inactive position.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: June 26, 1984
    Assignee: The Marlin Firearms Company
    Inventors: William E. Osborne, Nicholas A. Ketre