Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8037806 | Rifle A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the pis... | 10/18/2011 |
| 7350452 | Firearm with improved salvo accuracy and similar device for a firearm A fire arm with improved salvo accuracy, having a barrel and a casing mounted on a supporting frame, whereby the frame comprises a cradle provided with a slide which can slide in a direction which is mainly parallel to the axis of the barrel. The casing is mounted o... | 04/01/2008 |
| 7343844 | Firearm recoil absorbing system An anti-recoil system for counteracting recoil in firearms and weapons using a gas actuated piston assembly is disclosed. A recoil piston is acted upon by gas pressure routed from the receiver/barrel. High pressure gas causes forward movement of the recoil piston th... | 03/18/2008 |
| 7308967 | Sound suppressor A sound suppressor for a firearm for reducing sound and flash levels upon the discharge of a firearm comprises a cylindrical housing, a proximal end cap with means for attachment to a firearm and to the cylindrical housing, a distal end cap with means for attachment... | 12/18/2007 |
| 7299737 | Method and apparatus for an action system for a firearm A method and apparatus providing an action system for a firearm. The action system includes a primary roller-lock mechanism located rearward of an ejection port. The primary roller-lock mechanism includes a bolt and a first primary roller caged within the bolt. A bo... | 11/27/2007 |
| 7213498 | Rifle A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the pis... | 05/08/2007 |
| 7207258 | Weapon silencers and related systems Silencers are provided for a weapon having a combustion chamber and a barrel. The weapon is configured to launch a projectile with combustion gases generated in the combustion chamber. An exemplary silencer includes a proximal end and a distal end, the proximal end ... | 04/24/2007 |
| 7140141 | Apparatus and method for removing the slide of a semi-automatic pistol A semi-automatic firearm includes a frame and a movable slide mounted on the frame. The slide defines an ejection port and lateral walls that extend longitudinally from a rear face of the slide to adjacent a front face through which an opening is formed to permit eg... | 11/28/2006 |
| 7131367 | Hydraulic bolt buffer for firearm A hydraulic bolt buffer assembly for an automatic firearm, the firearm including a receiver having a longitudinal chamber, a bolt and carrier assembly mounted in the chamber for reciprocating movement between a recoil position and a battery position, a spring for ur... | 11/07/2006 |
| 7103998 | Camblock assembly for a firearm 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 a... | 09/12/2006 |
| 7069922 | Paintball marker internal reset system An internal reset system for paint ball markers. A hammer body as modified rearwardly to include an axial opening to receivably retain the forward head of a reset rod. The forward portion of the reset rod is thus free to reciprocate within the axial opening, but res... | 07/04/2006 |
| 7055422 | Reduced recoil anti-armor gun An improved Barrett anti-armor gun that is modified to function from the open bolt with advanced primer ignition, wherein the forward momentum of the recoiling masses at the moment of firing offset a significant portion of the recoil impulse from firing. The modific... | 06/06/2006 |
| 6901689 | Firearm pneumatic counter-recoil modulator and airgun thrust-adjustor An inexpensive generally retrofitable drop-in cartridge-unit of light-weight pneumatic-cylinder design for replacing the conventional metal/compression-spring member housed within the frame of a gun, thereby providing significantly smoother, quiter, more rapid, and ... | 06/07/2005 |
| 6848351 | Rifle A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the pis... | 02/01/2005 |
| 6802406 | Recoil brake isolation system A recoil brake isolation system for the hydraulic recoil brake cylinder of a large caliber gun, includes two sets of hydraulic valves disposed respectively within the inlet valve block and return valve block of the hydraulic cylinder, an orchestrated combination of ... | 10/12/2004 |
| 6758126 | Apparatus for initially slowly a backwards movement of a bolt group An apparatus 10 is provided for initially slowing a backwards extraction movement of a bolt group 12 of a weapon which moves backward automatically after firing and against a force of a return drive spring 14. The apparatus includes first and se... | 07/06/2004 |
| 6742297 | Firearm recoil reduction mechanism A mechanism embodying a shock absorber, gas spring, mechanical spring or other dampening device connected between slidably connected structural components of a firearm constitutes the basis of the firearm recoil reduction mechanism claimed in this application. The s... | 06/01/2004 |
| 6715399 | Firearm bolt assembly A firearm includes a moveable bolt assembly that absorbs energy associated with the discharge of the firearm. An energy absorbing mechanism within the bolt assembly may include a dampening spring that provides recoil energy dissipation. With this arrangement, one or... | 04/06/2004 |
| 6668478 | Firearm pneumatic counter-recoil modulator & airgun thrust-adjustor An inexpensive generally retrofitable drop-in cartridge-unit of light-weight pneumatic-cylinder design for replacing the conventional metal/compression-spring member housed within the frame of a gun, thereby providing significantly smoother, quiter, more ... | 12/30/2003 |
| 6595103 | Inertial breechblock gun system A contained Davis gun system enables misfire and hang-fire handling for fire out of battery (also known as soft recoil). The gun system decreases structural dynamic activity of the gun barrel during launch with resulting increases in system accuracy. The ... | 07/22/2003 |
| 6536324 | Anti-recoil device with brake, brake compensator and recuperator The invention relates to anti-recoil devices for guns and martars. The anti-recoil device has a brake with a principal cabity which houses a principal piston pierced with holes. The small chamber of the brake is connected by an opening to a subisdiary chamber ... | 03/25/2003 |
| 6443045 | Rammer for an artillery piece A rammer for an artillery piece with a barrel that can be elevated. The rammer has a cradle upstream of the barrel. The cradle is aligned with the powder chamber, has an accommodation for the shell, travels subject to a guide along a track that parallels ... | 09/03/2002 |
| 6418833 | Recoil spring tube assembly An improved recoil spring tube assembly for an auto-loading firearm includes a recoil spring slideable within a recoil spring tube and including a recoil spring follower all manufactured of a corrosion resistant material. The bore of the recoil spring tub... | 07/16/2002 |
| 6314859 | Self-loading pistol conversion kit for a locked self-loading pistol and a weapon system composed of an optionally locked or unlocked self-loading pistol An unlocked self-loading pistol and a conversion kit for modifying a locked self-loading pistol adapted for firing normal and powerful cartridges into an unlocked self-loading pistol capable of firing weak cartridges as well as normal and powerful cartrid... | 11/13/2001 |
| 6250198 | Shock absorbing mount for adjustable barrel Disclosed is a mount releasably attached to a launcher/spotting rifle assembly. The mount, when released, allows for the barrel of the spotting rifle of the launcher/spotting rifle assembly to be adjusted in a spherical manner, and when tightened, rigidly... | 06/26/2001 |
| 6227097 | Device to regulate the counter-recoil rate artillery cannon according to the temperature The technical scope of the invention is that of devices to regulate the counter-recoil rate of an artillery cannon according to the temperature. The regulation device according to the invention comprises a buffer co-operating with a ring, so as to ensure the g... | 05/08/2001 |
| 6212991 | Rapid fire mechanism for firearms The invention provides an apparatus for reducing recoil on a firearm or gun and to increase rate of firing. The invention uses a dual mass system to dynamically balance the gun wherein some of the energy of firing is absorbed within springs and thereby re... | 04/10/2001 |
| 6196108 | Damped spring mechanism for a firearm A damped spring device for a firearm is disclosed. The damped spring device includes a housing, a cylindrical outer tube fixed to the housing and defining a cavity, and a cylindrical barrel slidably disposed within the outer tube cavity such that the oute... | 03/06/2001 |
| 6192780 | Forward receiver buffer Positioned on a rear portion of a front receiver lug post on a gun so that when the bolt carrier springs forward the impact of the bolt carrier striking and abruptly stopping against the receiver lug post will be minimized. The forward receiver buffer com... | 02/27/2001 |
| 5909002 | Buffer for firearm A buffer assembly for use with firearms such as the M-16 rifle, for reducing the cyclic rate of firing in full-automatic operation. The buffer assembly includes a unit of length selected to stop the bolt carrier at the desired full-recoil position, and a ... | 06/01/1999 |
| 5827992 | Gas operated firearm A known gas operated firearm has been modified to be of more compact size and reduced weight while retaining the firepower, the features, and most of the components of its predecessor. A bolt assembly reciprocably mounted in a longitudinal cavity of a rec... | 10/27/1998 |
| 5710389 | Breech bolt and lock assembly A breech bolt and lock assembly for a gas-operated firearm is provided. The ssembly is contained within a bolt housing which in turn contains a bolt operating spring and a two-part bolt mechanism. The two-part bolt has a cylindrical outer bolt which enclos... | 01/20/1998 |
| 5608180 | Maneuvering device for the recoiling mass of a piece of artillery A maneuvering device for a recoiling mass of a piece of artillery. The maneuvering device includes first and second ends that are attachable, respectively, to a recoiling mass and a cradle of the piece of artillery. The present invention is applied to the... | 03/04/1997 |
| 5513730 | Nonlinear shock absorber A nonlinear shock absorber is disclosed. The device has a housing filled with hydraulic fluid and contains a relatively heavy mass or piston supported by a helical coil. The helical coils disposed and shaped so as to provide a nonlinear resistance to a sh... | 05/07/1996 |
| 5505118 | Gun barrel vibration damper A damping device for a gun barrel (1) having a muzzle brake (2) comprises a recoil brake (3) and a vibration damper (9) to prevent natural vibrations in the gun barrel when firing a shot, from propagation to the recoil brake. The connection of the vibrati... | 04/09/1996 |
| 5465645 | Recoil buffer for semi-automatic pistol A recoil buffer for a semi-automatic pistol having conventional, relatively moveable slide and frame with opposing abutment surfaces limiting rearward movement of the slide in response to firing the pistol. The recoil buffer is a layer of firmly resilient... | 11/14/1995 |
| 5457901 | Recoil absorption means for a shotgun A shotgun, such as a pump shotgun, has the recoil thereof controlled a spring system. The shotgun includes a breech bolt that is locked to an operating arm during cocking, but is then released from that operating arm when in the battery location and is he... | 10/17/1995 |
| 5390583 | Single-action rammer The present invention relates to a method and apparatus for rapid loading of separate-loading ammunition in artillery guns, the shell and propellant charge being placed after one another on or in a carrier being accelerated up to a high velocity centered ... | 02/21/1995 |
| 5279202 | Bolt repositioning device for firearms A semiautomatic firearm including a recoil spring acting on the bolt for closing the breech after the ejection of the case. The repositioning device includes an auxiliary resilient member which cooperates with the recoil spring, so that although a low-rig... | 01/18/1994 |
| 5168120 | Recoil systems A device is employed in a recoil system for large-caliber ordnance, to effectuate damping of the recoil system during its rearward movement with simultaneous storage of energy obtained from the recoil kinetic energy of the recoil system. The device then s... | 12/01/1992 |
