Abstract: The invention relates to a gun barrel mounting for a gun barrel, comprising a cradle with at least one gun mounting for mounting the gun barrel and a base part that can be connected to the gun barrel.

Abstract: An electric hand-held power tool (100), in particular a hammer drill or chipping hammer, having a percussion mechanism assembly (10), which vibrates along a vibration axis (A), and a handle assembly (20), which is vibrationally decoupled via an anti-vibration unit (30), wherein the anti-vibration unit (30) has a coil spring (35), oriented along the vibration axis (A), having a plurality of turns, wherein the coil spring (35) is in the form of a cylindrically progressive compression spring (36) having two stiffness regions (S1, S2) with different levels of stiffness.

Abstract: The weapon mount is versatile, lightweight, easy to use, can absorb forces generated by recoil, and may be used for different types of weapons. The weapon mount includes a cradle mounted on a swing or swivel bracket, the cradle having a fixed front support and a back sliding support. First and second shock absorbers are mounted laterally in the cradle parallel to each other. A plurality of connection pins allow adjustment of the cradle to support different weapons. Ammo can holder brackets may be mounted on one side of the cradle. The shock absorbers have hinges, allowing the shock absorbers to be rotated to support different weapons. The swing bracket permits the weapon mount to be rotated 360° clockwise or counterclockwise, and the mount may be elevated 60° or lowered 10°. The weapon mount may be made of stainless steel.

Abstract: Systems (100) and methods (1200) for recoil absorption. The methods comprising: causing a moving carrier (102) to freely travel linearly in a first direction by discharging at least one recoil producing device (110-114); absorbing an impulse force resulting from discharging the recoil producing device using a spring (122, 124) having a first end coupled to the moving carrier and a second end (130) coupled to a fixed frame member (132); and applying a pulling force by the spring to the moving carrier in a second direction opposed from the first direction at an end of spring travel, whereby a uni-directional force transfer mechanism (610) is caused to engage an elongate latching element so as to latch the moving carrier in position and prevent the moving carrier from freely traveling in the second direction.

Abstract: A reset spring device for a one-log splitter single-action hydraulic cylinder comprises a spring guide, reset spring, bearing, curved transmission lever, and guide seal. The spring guide has a first end and second end, the reset spring housed within the spring guide, the bearing housed within a portion at the first end, the spring abutting the bearing, the guide seal disposed at the first end of the guide, the transmission lever positioned outside the spring guide and engaged with the bearing. The transmission lever having a curved protrusion operably engaged through a longitudinal opening on the spring guide and through a groove on the bearing. A push plate is connected to the lever. During operation, when a cylinder is pushing forward, the lever compresses the spring through the bearing; and when a handle is released, the log splitter ceases operating, the cylinder is reset by each reset spring device.

Abstract: A method for damping aeroelastic modes, including limit cycle oscillations (LCO), is implemented by determining a mass for a tuned mass damper (TMD) based on an modal frequency for a mode having a potentially positive growth rate and attaching a TMD to at least one attachment point with significant motion such that a damping axis of the tuned mass damper is substantially oriented in a direction aligned with the local modal deflection.

Abstract: A spring/rod recoil assembly may be improved with Belleville springs arranged in combinations of nested and inverted stacks that absorb recoil impact energy while providing rebound energy to properly load cartridges from the magazine into the chamber. A firearm assembly may include a cylindrical spring, and guide rod—having stops at both ends—lengthwise situated within the cylindrical spring. The assembly may include a Belleville spring stack captured on the guide rod between a back-end stop and the cylindrical spring, with one or more stacks of nested springs and one or more stacks of inverted springs. The spring stack may be arranged to return some of the recoil energy produced during firing of the firearm, and decelerate slide velocities without damage to the firearm. Each spring has a diameter allowing it to fit within a back chamber where at least the back-end of the guide rod and spring are situated.

Abstract: The invention relates to a support device for the gun sight of a military vehicle, incorporating a head to which the gun sight is fastened and a foot which is integral with the vehicle, the head being integral with a column with a vertical axis which is introduced into the foot, the column being made integral with the foot by spring means wherein the spring means are constituted in the form of tongues arranged along at least two parallel planes perpendicular to the vertical axis of the support, each plane incorporating at least three tongues evenly spaced angularly around the column and integral with it by a first end and integral with the foot by their second end, these spring means imparting stiffness to the link between the column and the foot that is less along the vertical axis than along the other directions (X, Y) orthogonal to this vertical axis.

Abstract: The invention relates to a weapon (1), constructed relatively simply and compactly, for shooting ammunition (2), with a barrel (3) with recoil and a braking device (12) damping the barrel recoil. According to the invention, a plastically deformable absorption body (12) is used as the braking device (12) for reducing the recoil energy. Thus, a weapon assembly for firing ammunition is provided, wherein the weapon assembly includes: (a) a weapon including a weapon barrel provided with a recoil spring that holds the weapon barrel in an initial position; and (b) a braking device that damps barrel recoil of the weapon barrel when firing ammunition, wherein the braking device is a plastically deformable absorption body.

Abstract: A stock assembly for attachment to a firearm assembly is described. The stock assembly includes a buttstock having a longitudinal conduit and a locking member; a connector tube with front and back ends slidable within the buttstock conduit between a fully inserted position and a fully extended position, the tube having a longitudinal conduit; an attachment member slidable within the tube conduit between a forward position and a rearward position, the attachment member having a front end attachable to the firearm assembly and a rear end; a spring within the connector tube engaging the rear end of the attachment member, the spring urging the attachment member toward its forward position; and locking means preventing rotation of the attachment member relative to the connector tube, while allowing the attachment member to move within the tube between its forward and rearward positions.

Abstract: A buffer tube for a firearm, which is not an M16-type firearm, the buffer tube including a recoil mitigation tube, a recoil piston reciprocatingly mounted inside the recoil mitigation tube, and a recoil absorbing mechanism disposed in the recoil mitigation tube and engaging the recoil piston.

Abstract: A recoil absorbing assembly is provided for automatic weapons secured to a weapon cradle having a fixed portion and a portion movable longitudinally thereto, the fixed cradle portion being rotatably mounted to a support, including a recoil absorbing spring and friction device arranged in connection with the cradle portions. Further the friction device includes a main shaft provided with angled friction blocks and a movable bearing housing surrounding the main shaft and having free floating pistons as to cooperate with the friction blocks, the recoil absorbing spring being situated on the main shaft in elongation of the bearing housing.

Abstract: A weapon may include a translatable recoil mass and two translatable counterweights disposed on opposite sides of the recoil mass. Each counterweight may have a mass that is substantially one-half a mass of the recoil mass. A pair of racks may be fixed to respective ones of the counterweights and a second pair of racks may be fixed to opposites sides of the recoil mass. Pinions may engage the counterweight and recoil mass racks. A receiver may be fixed with respect to the recoil mass and the pair of counterweights. The directions of translation of the recoil mass are substantially opposite directions of translation of the two counterweights.

Abstract: Recoil mitigating devices and methods for use with projectile firing systems such as a disrupter mounted to a robotic arm. A pair of parallel spring provides dampening of axial recoil movement of the disrupter relative to the robotic arm. Forward ends of the springs are attachable to the barrel of the disrupter while rearward portions of the springs are attachable to the robotic arm by a robot mount block. The robot mount block at least partially encloses the barrel of the disrupter in connecting the parallel springs and permits axial movement of the disrupter along or through the mount during firing.

Abstract: Recoil mitigating devices and methods for use with projectile firing systems such as a disrupter mounted to a robotic arm. A pair of parallel spring provides dampening of axial recoil movement of the disrupter relative to the robotic arm. Forward ends of the springs are attachable to the barrel of the disrupter while rearward portions of the springs are attachable to the robotic arm by a robot mount block. The robot mount block at least partially encloses the barrel of the disrupter in connecting the parallel springs and permits axial movement of the disrupter along or through the mount during firing.

Abstract: Recoil mitigating devices and methods for use with projectile firing systems such as a disrupter mounted to a robotic arm. A pair of parallel spring provides dampening of axial recoil movement of the disrupter relative to the robotic arm. Forward ends of the springs are attachable to the barrel of the disrupter while rearward portions of the springs are attachable to the robotic arm by a robot mount block. The robot mount block at least partially encloses the barrel of the disrupter in connecting the parallel springs and permits axial movement of the disrupter along or through the mount during firing.

Abstract: A recoil absorbing assembly is provided for automatic weapons secured to a weapon cradle having a fixed portion and a portion movable longitudinally thereto, the fixed cradle portion being rotatably mounted to a support, including a recoil absorbing spring and friction device arranged in connection with the cradle portions. Further the friction device includes a main shaft provided with angled friction blocks and a movable bearing housing surrounding the main shaft and having free floating pistons as to cooperate with the friction blocks, the recoil absorbing spring being situated on the main shaft in elongation of the bearing housing.

Abstract: Recoil mitigating devices and methods for use with projectile firing systems such as a disrupter mounted to a robotic arm. A pair of parallel spring provides dampening of axial recoil movement of the disrupter relative to the robotic arm. Forward ends of the springs are attachable to the barrel of the disrupter while rearward portions of the springs are attachable to the robotic arm by a robot mount block. The robot mount block at least partially encloses the barrel of the disrupter in connecting the parallel springs and permits axial movement of the disrupter along or through the mount during firing.

Abstract: A firing device (1) for close-in defense ammunition (2), ammunition incorporating a rigid casing (6) enclosing at least one projectile (7), casing integral with a base (8) that can be joined by linking means to a firing device base (3) incorporating means to prime the ammunition, device characterized in that it incorporates a tube (10) capping the ammunition (2) after this ammunition has been fixed onto the firing base (3), such tube that is itself made integral with the firing base (3) by attachment means (11), such tube further carrying an articulated bipod (15) enabling the orientation in elevation of the device (1).

Abstract: In a recoil mechanism for a gun having a frame with a barrel, a slide that is movable rearwardly of the frame and barrel when the gun is fired, and a main recoil spring, the improvement is a plug having an inner cylindrical surface with a helical groove for receiving and thereby deactivating the bias of a plurality of turns of the main recoil spring, the recoil spring having a plurality of turns threaded into the helical groove for deactivating the bias of the plurality of turns during a firing of the gun.

Abstract: A weapon includes a receiver having a bolt carrier assembly therein; a buttstock disposed behind the receiver, the buttstock having a tubular opening adjacent an end of the bolt carrier assembly; a larger diameter spring disposed in the tubular opening; a smaller diameter spring disposed in the larger diameter spring; a rod disposed in the rear end of the smaller diameter spring; a bumper attached to the rod; and a cap disposed in the front end of the spring, the cap having a head wherein a front side of the head engages the end of the bolt carrier assembly and a front end of the larger diameter spring bears against a rear side of the head.

Abstract: An isolation system for a sensitive component or apparatus affixed to a mortar tube comprising a barrel mount assembly which supports two parallel shafts. A plate parallel with each axis of the two shafts positions four bearing carrier blocks, two each containing a sleeve bearing which rides on each of the shafts to allow the plate assembly to slide freely along the length of the shafts and support an isolated cage. During firing, the travel vector is decoupled from the cage by the shafts as they move with the barrel through the bearings leaving the cage assembly in free space. The cage then accelerates under the force of gravity over the distance of the displaced travel of the shafts back to its rest position landing on steel springs or dampers, each on a shaft and seated against the lower flange end of the barrel mount assembly.

Abstract: 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 thereby generating a force opposing the recoil generated upon firing. A shock absorbing bumper connected to the piston engages the weapon's rearwardly moving bolt assembly. The bolt assembly forces the recoil piston rearward and compresses the bumper and expanded gas in the recoil piston chamber thereby absorbing additional recoil forces. Upon reaching a rear most position a gas relief valve is opened allowing venting of the compressed gases at which point the bolt operating main spring propels the bolt assembly forward, stripping the top round out of the ammunition magazine, loading the next round, locking the bolt and freeing the firing pin to fire the next round.

Abstract: The gun may have a receiver element with a barrel extending forwardly from the receiver element with the barrel having a chamber end and a discharge end. A handle element may be attached to the receiver element and a trigger assembly may be integrated with the handle element. The receiver element may have a bolt carrier chamber formed therein and a bolt carrier assembly slidably disposed in the bolt carrier chamber. The bolt carrier chamber at a rearward portion thereof and the bolt carrier assembly may define a gas chamber. A bolt assembly may be slidably disposed in the bolt carrier assembly. An actuator may be slidably engaged with the receiver element and may be engageable with the bolt carrier assembly and the bolt assembly. A firing pin assembly may be slidably disposed in said bolt assembly and may have a firing assembly in communication with said trigger assembly.

Abstract: 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 tube and the contact surface area of the guide collar of the recoil spring follower are honed or polished to provide a surface having an average surface roughness between 1.0 &mgr;in. and 30.0 &mgr;in. The recoil spring tube assembly is configured such that the recoil spring has a spring rate greater than 0.80. In one embodiment of the invention, the recoil spring tube assembly includes a recoil spring follower sized and configured so as to have a mass that results in an assembly wherein the ratio of the recoil spring follower mass to the recoil spring rate, or displacement constant is in the range of 0.10-0.30.