Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7975595 | Firearm A firearm having a bolt carrier comprising an operating rod slot that is open at an end of the bolt carrier. The bolt carrier also includes a cam slot extending from the operating rod slot. The firearm includes a bolt having a protrusion extending from the bolt whic... | 07/12/2011 |
| 7930968 | Cam pin with roller for bolt carrier A bolt used in a self loading firearm employing a bolt carrier which in turn carries the bolt. The bolt includes a cam pin receptacle and a cam pin carried by the bolt. The cam pin includes a body having a received end and an exposed end. The received end is receive... | 04/26/2011 |
| 7356958 | Forward rail mounted trigger module The present invention is a rail mounted forward trigger mechanism featuring in-line linkage between the primary and secondary triggers. Access to adjustment features provides adjustability while simultaneously allowing the mechanism to remain installed. The linkage ... | 04/15/2008 |
| 7347023 | Machine guns having detachable barrels and methods operating the same Machine guns having detachable barrels and methods of operating the same are disclosed. An illustrated example firearm includes a housing; a removable barrel; a latch to releasably secure the barrel in the housing, the latch having a released state and a secured sta... | 03/25/2008 |
| 7331135 | Internally asymmetrical bolt carrier A bolt locking housing (16) on a gun, behind the chamber (4) thereof, for receiving a bolt (6) including an extractor (10) having an extractor hook that grips a corresponding extractor groove (21) of a cartridge (2) within s... | 02/19/2008 |
| 7316565 | Action reciprocating structure of a toy gun An action reciprocating structure of a toy gun an action part and a gear box of a loading mechanism, of a toy gun, wherein the action part is located at a top of the toy gun, the gear box is located at a bottom of the toy gun, and a reciprocating mechanism is locate... | 01/08/2008 |
| 7311032 | Firearms with gas pressure loading mechanisms Firearms employing gas pressure loading mechanisms are disclosed. An example firearm includes a single force receiving component containing a gas cylinder, and a barrel in communication with a cartridge chamber received in the force receiving component. The cartridg... | 12/25/2007 |
| 7287456 | Breech-block system for a firearm A breech system for a firearm exhibits a breech which can be locked in its movement in the barrel block by at least one locking element, which is pressed against the rear end of the barrel by means of a breech spring surrounding the rigid barrel of the weapon, the b... | 10/30/2007 |
| 7278347 | Submarine A submarine is equipped with an extending apparatus on whose free end a container (4) resistant to underwater pressure is arranged, in which an essentially recoil-free gun (5) lies. The container (4) in the submerged condition of the submarine m... | 10/09/2007 |
| 7275472 | Gas ring for firearm A bolt assembly for a direct gas firearm includes a plurality of sealing rings. In an embodiment, there are three rings with ring gaps cut at about a 45 degree angle and the middle ring is flipped so that the angle of the gap of the middle ring is approximately 90 d... | 10/02/2007 |
| 7237469 | Firearms having a locked breech Firearms having a locked breech are disclosed. An example firearm includes a barrel; a bolt head; a firing pin having a bulge; a bolt head carrier having a forward position and a rearward position; a central force receiving component receiving a rear end of the barr... | 07/03/2007 |
| 7143537 | Firing pin assembly A firing pin assembly is provided that includes a firing pin and a firing pin shaft. The firing pin is received in a slot of the end of the firing pin shaft to be retained therein with a spring retaining sleeve, a main spring, and a main spring sleeve. The firing pi... | 12/05/2006 |
| 7131228 | Modular firearm An M-4 firearm having a lower receiver assembly and an upper receiver assembly. The upper receiver assembly is connected to the lower receiver assembly. The lower receiver assembly has a fire control assembly. The upper receiver assembly has a barrel and a hand guar... | 11/07/2006 |
| 7100593 | Pneumatically operated projectile launching device A pneumatically operated projectile launching device preferably comprises an electro-pneumatic flow distribution mechanism that receives and directs compressed gas to a pneumatic mechanism to open a bolt. ... | 09/05/2006 |
| 7076904 | Detachable gun barrel assembly A detachable gun barrel assembly having an adapter for threaded engagement with the receiver and a barrel dimensioned for affixation to the adapter. The adapter has a mating end section which threadedly engages the receiver V-threads and a receiving end section havi... | 07/18/2006 |
| 7040213 | Firearm receiver system with belt-feed capability A firearm receiver system including a receiver body, an ammunition belt feeding assembly and a bolt carrier. The receiver body includes a first face and a second face approximately opposite the first face. The receiver body is configured for having means for trigger... | 05/09/2006 |
| 7000345 | Underbarrel shotgun A shotgun comprises a receiver made from a first material; barrel having a portion extending into the receiver and made from a second material; a collar nut securing the barrel to the receiver; a bolt assembly disposed within the receiver and including a locking blo... | 02/21/2006 |
| 6978709 | Breech device for bolt action firearms A breech device for bolt-action firearms includes a breech body reciprocating in the receiver and rotatable into locking position. In its front part, the breech body has locking lugs located in three sectors, the locking lugs in at least two sectors being formed in ... | 12/27/2005 |
| 6971202 | Gas operated action for auto-loading firearms A gas operated action for auto-loading guns may comprise a receiver, a biasing spring, a bolt-carrier reciprocable within the receiver, a bolt having a cam pin, and an action rod fixedly attached to the receiver. The cam pin may engage the action rod during recoil t... | 12/06/2005 |
| 6609319 | Bolt assemblies for firearms New and improved bolt assemblies for M4/M16 firearms capable of firing a remarkably greater number of rounds than previously available M4/M16 firearms are, disclosed that have right and left compression springs that are parallel to each other, straddle th... | 08/26/2003 |
| 6564491 | Firearm bolt assembly An elastic sleeve having a longitudinal slit is positioned between a bolt head and bolt carrier. The sleeve is inserted into an annular space in the bolt carrier when the sleeve is radially compressed allowing relative movement between the bolt head and b... | 05/20/2003 |
| 6536150 | Automatic firearm with a moving bolt assembly with locking projections The bolt assembly includes a bolt head having a locked position and an unlocked position. The bolt head also has a periphery and an even number of arrangement sites located on the periphery. The bolt assembly further includes a plurality of locking projec... | 03/25/2003 |
| 6418655 | Underbarrel shotgun A shotgun comprises a receiver made from a first material; barrel having a portion extending into the receiver and made from a second material; a collar nut securing the barrel to the receiver; a bolt assembly disposed within the receiver and including a ... | 07/16/2002 |
| 6393961 | Straight-pull breechblock with rotating boss locking mechanism for repeating weapons Straight-pull breechblock (20) with rotating-boss locking mechanism for repeating weapons, having a breechblock head (27) which is guided in a longitudinally and rotationally movable manner in a breechblock housing (22) and has locking bosses (42, 43), an... | 05/28/2002 |
| 6240670 | Locking mechanism for firearms A locking mechanism for use in a wide variety of firearms to assist in securing the firearm from unauthorized use, the locking mechanism being rotatable between an unlocked position where it allows movement of the firing pin and a locked position where it... | 06/05/2001 |
| 6182389 | Bolt assembly for a firearm 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 lugs are integrally connec... | 02/06/2001 |
| 6112636 | Gas-operated pistol A gas-operated pistol which comprises a frame having a handgrip and adapted to receive a magazine. A slide is mounted for alternating longitudinal movement along the frame. A barrel is provided which is able to pivot at its muzzle end and rotate upwards f... | 09/05/2000 |
| 6044748 | Breech bolt assembly for a firearm Reliability of a multi-lug breech bolt is improved by modifying the bearing relationship between the bolt lugs and the matching lugs within a gun receiver. This procedure is applied to a gun that has a receiver housing a breech bolt and an extractor. The ... | 04/04/2000 |
| 5911173 | Breech bolt assembly for a firearm Reliability of a multi-lug breech bolt is improved by modifying the bearing relationship between the bolt lugs and the matching lugs within a gun receiver. This procedure is applied to a gun that has a receiver housing a breech bolt and an extractor. The ... | 06/08/1999 |
| 5886281 | Breech block control for firearm for projectiles The invention concerns a firearm for receiving and firing a projectile. The firearm includes an integral casing having a barrel and a breech block receiving area to the rear of the barrel. A breech block is guided through the breech block receiving area b... | 03/23/1999 |
| 5448940 | Gas-operated M16 pistol A modified M16 pistol capable of firing rifle cartridges therein in automatic or semi-automatic mode, which pistol is based upon modified M16 upper and lower assemblies, with a pistol barrel, an M16 gas actuation system, and a spring-biased buffer system ... | 09/12/1995 |
| 5351598 | Gas-operated rifle system An M16 type rifle is disclosed having a gas piston assembly with a relatively large piston area and sufficient stroke to actuate the M16 bolt carrier assembly in order to allow the M16 rifle to be chambered for short low-pressure pistol cartridges such as... | 10/04/1994 |
| 4982649 | Straight-action breech block system A tubular automatic weapon includes a barrel having a rear terminal portion defining a chamber, and a breech block having a breech block axis and being arranged for movement in axial alignment with the barrel. The breech has a block housing, a rotary head... | 01/08/1991 |
| 4920855 | Bolt assembly for self-loading gun A bolt assembly (1) for a self loading rifle comprises a rotating bolt (2) mounted in a bolt carrier (3), the bolt being provided with locking teeth (6) which, in use, interengage with teeth (7) on the barrel extension (8) of the weapon. The angular posit... | 05/01/1990 |
| 4867040 | Self-unlocking device for recoiling bolt carrier and barrel in a semi-automatic rifle A semi-automatic rifle including a recoiling barrel adapted to carry rearward the elongated bolt carrier containing the bolt for compressing the recoil spring, and a self-unlocking device including a self-unlocking rod longitudinally slidably mounted on t... | 09/19/1989 |
| 4765224 | Automatic rifle gas system An M16-type automatic rifle is provided with an improved gas operating system. The tube extending forwardly from the bolt carrier key is of such length that it permanently mates with the aftwardly extending gas transfer tube as the bolt carrier key shuttl... | 08/23/1988 |
| 4704945 | Controlled percussion device for automatic weapon The field of the invention is that of percussion devices used in automatic weapons. The invention consists of integrating the firing pin 12 with carrier piece 1 during the locking phase and then with the movable bolt head 7 during the recoil phase. The in... | 11/10/1987 |
| 4655118 | Arrangement for locking a breechblock head at the rear end of a weapon barrel It has been shown that at high firing rates or cadences, especially in externally powered firing weapons like Gatling guns, the rebound of the breechblock head during its locking at the rear end of the weapon barrel can have damaging effects. At its rear ... | 04/07/1987 |
| 4619184 | Gas actuated pistol A fully gas operated pistol includes a frame unit, a barrel unit, a bolt carrier unit slidably supported on the frame unit and a spring which urges the bolt carrier unit into a forward, bolting position. A path links the breech end of the barrel with a re... | 10/28/1986 |
| 4604942 | Bolt assembly with a rotating locking bolt head and a floating bolt element for automatic firearms A bolt assembly for an automatic firearm which operates using kinetic recoil energy that includes a floating bolt element, a rotatable locking bolt head and a return spring interposed between them, all in communication with the barrel. The bolt head is fo... | 08/12/1986 |
