Class 89/138 - Locks bolt open

Subclass of Class 89 - Ordnance
Definition: Guns wherein the breech block is locked open after the last
No. of patents: 34
Last issue date: 06/15/2010

Number	Title	Issue Date
7735410	Firearm bolt 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 siz...	06/15/2010
7360331	Pistol with firing pin blocking magazine disconnect mechanism An autoloading pistol with a magazine disconnect mechanism that blocks discharge of the pistol when the magazine is removed by action upon the pistol's firing pin. The pistol may generally include a removable magazine, a housing defining a chamber to hold a cartridg...	04/22/2008
7313996	Handheld firearm A handheld firearm which is in the form of a self-loading pistol with a bolt lock, having two operating levers which can pivot and each have a handle for operation of the bolt lock, with the operating levers being arranged on mutually opposite sides of the handheld ...	01/01/2008
7293385	Modular trigger group for firearms and firearm having a modular trigger group 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 housin...	11/13/2007
7261029	Firearm bolt locking mechanism 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 o...	08/28/2007
7231864	Reciprocating barrel firearm apparatus A firearm apparatus includes a gun housing which includes a barrel support channel between a front gun housing portion and an intermediate gun housing portion. A reciprocating barrel is housed inside the gun housing and includes a piston-sleeve-contained barrel port...	06/19/2007
7228780	Handgun with two-sided breechblock mechanism A handgun, particularly an automatic pistol, with a grip piece, a breech that can be longitudinally displaced relative to the grip piece, and a breechblock mechanism that can be actuated on both sides and serves for holding the breech in its open position. The breec...	06/12/2007
7051638	Trigger mechanism for small firearms A trigger mechanism for small firearms with a striking hammer, a trigger, and a trigger rail, which interacts with the trigger and which can be moved by a control element from an engagement position for cocking the striking hammer into a release position for releasi...	05/30/2006
7010878	Trigger system and method of installing same A trigger system for an automatic handgun includes a trigger bar sized to be installed in an interior space behind a trigger by movement from the magazine well. The trigger bar is first inserted into the inlet opening of the magazine well and into the interior space...	03/14/2006
6993864	Locking block for compact semi-automatic pistols A locking block mechanism for a compact semiautomatic pistol includes a pair of forward guide rails, which are normally separate from the locking block. Additionally, the locking block includes transverse ribs on the sides of the locking block, which engage mating s...	02/07/2006
6952940	Double lock T-handle assembly A double lock T-handle is disclosed having a tray which includes an inwardly dished handle receiving area, a second recessed handle receiving region, and a recessed padlock receiving depression. The tray further includes a lock cylinder casing having a locking cylin...	10/11/2005
6907814	Automatic firearms with a detachable breech lock Firearm(s) with a breech lock are disclosed. One such firearm includes a first pivoting lever which, when actuated, releases the breech lock and a second lever, which when actuated also releases the breech lock. The first and second levers are located on opposite si...	06/21/2005
6871437	Apparatus and method for locking firearm in an open position by blocking action 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 i...	03/29/2005
6851346	Firearm bolt catch assembly 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 ho...	02/08/2005
6510778	Automatic bolt hold-open assembly 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 ....	01/28/2003
6431045	Trigger system for recoil driven weapons 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 explosi...	08/13/2002
5835978	Shoulder-launched multiple-purpose assault weapon 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...	11/10/1998
5473834	Automatic or semiautomatic firearm 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 co...	12/12/1995
5131317	Pistol with automatic mechanism for the release of a slide catch 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 in...	07/21/1992
5085123	Large-caliber guns 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 ra...	02/04/1992
4681020	Control for a detent for a slide for automatic firearms, especially for automatic pistols 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 a...	07/21/1987
4664015	Automatic gun with improved firing mechanism 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....	05/12/1987
4594935	Breech locking system for self loading fire arms 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 s...	06/17/1986
4589327	Firing lock with safety system for self loading fire arms 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 positi...	05/20/1986
4549465	Slide stop plate assembly for a handgun 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 ...	10/29/1985
4481863	Operating lever for the block and hammer of a self-loading hand firearm 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...	11/13/1984
4455919	Last shot bolt hold-open device 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 ...	06/26/1984
4438678	Bolt stop and cartridge ejector for auto-loading rifle An auto-loading or semi-automatic firearm having a reciprocating bolt and a magazine positioned below the path of the bolt. The bolt has a longitudinal recess therein and finger means mounted adjacent the bolt which extend into the bolt recess. The finger...	03/27/1984
4348938	Two stage shell feeding apparatus with shell feeding path control Two stage shell feeding apparatus for a reciprocating bolt-type automatic cannon or gun, comprises a first stage shell rotor, having a plurality of shell cavities, rotatably mounted between a shell supply and a cannon shell pick up position, such that whe...	09/14/1982
4176584	Slide locking mechanism for magazine-fed firearms In a magazine-fed firearm having its barrel fixed to the frame and having a slide reciprocably mounted to the frame, with resilient means positioned between the slide and the frame urging the slide toward the muzzle, a lever rotatably mounted to the frame...	12/04/1979
4132023	Self-loading pistol A self-loading pistol designed as a grip-cocking type pistol, the grip of which is provided with a cocking lever arranged at the gripfront facing the muzzle of the barrel. Said cocking lever loads an energy accumulator which is released by a trigger and w...	01/02/1979
4128042	Automatic bolt catch release apparatus for firearm Automatic bolt catch release apparatus for an open-bolt firearm of the type which includes a bolt catch to retain the fully-automatic bolt in open position upon firing the last round in a magazine. The bolt catch is released when the empty magazine is wit...	12/05/1978
4069608	.22 Caliber rimfire adapter system for M16 type rifle A unitary bolt and chamber adapter for field replacement, without tools, of the conventional bolt assembly of rifles of the type M16 and AR-15 provides for the use of conventional .22 caliber long rifle rimfire ammunition in the rifle instead of the large...	01/24/1978
4057003	Open bolt conversion apparatus An open-bolt firing conversion for the standard M16 rifle, which allows the rifle to be converted to open-bolt firing by replacement of parts and without otherwise altering the rifle. The open-bolt conversion is hammer-fired for reliability and preservati...	11/08/1977

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Class 89/138 - Locks bolt open