45 results about "Rifling" patented technology

Examples provide a compensator for a firearm. In one example, a firearm assembly includes a firearm having a barrel defining a projectile bore along a bore axis, an attachment mechanism coupled to the firearm and configured to mount the firearm to a movable platform, and a compensator attached to the barrel. The compensator may have a body that defines at least one compensator port configured to vent a portion of gases exiting the barrel upon firing the firearm. In one example, the compensator is oriented on the barrel to direct the portion of gases vented through the at least one compensator port in a direction to counteract angular recoil forces on the movable platform to which the firearm is mounted, the angular recoil forces being caused upon firing of the firearm.

A 25 mm ammunition cartridge centered about a longitudinal axis and extending from a proximal end to a distal end including a case having a base defining the proximal end and a case sidewall extending from the base to a distal mouth and defining a case cavity, a propellant charge disposed in at least a portion of the case cavity, a body having a proximal cup and a body sidewall extending to a distal interface, wherein at least a proximal portion of the body is receivable in the case cavity distal to the propellant charge, a cap extending from a proximal cap portion coupled to the distal interface of the body to a dome defining the distal end of the cartridge, wherein the body and the cap define a projectile cavity, and one or more projectiles positioned within the projectile cavity.

The present invention is a multi-tooth segmented electrolytic machining cathode and tooling for rifling large-caliber artillery barrels, which overcomes the problems of uneven flow field and easy short circuit during the machining process of the electrolytic machining cathode in the prior art, poor cathode forming accuracy, high cost of repeated cathode correction, and long development cycle. It includes a cathode body, on which a segmented cathode copper body with multi-tooth working teeth is designed. The rear guide is set at the tail end of the cathode body, and the front guide is set at the cone end of the cathode body. The intermediate connecting device between the cathode body and the pull rod plays a connecting role. During operation, the cathode body, the pull rod, and the intermediate connecting device rotate and feed together. The inner wall of the segmented cathode copper body on the cathode body is provided with a wedge-shaped positioning keyway. The segmented cathode copper body is fixed in series with a wedge-shaped key, and the multi-tooth working teeth on the segmented cathode copper body have different characteristic parameters, including the negative line angle, the positive line angle, the tooth width, the tooth depth, the wrap angle, etc.

The utility model belongs to bore cleaning and maintaining device technical field, especially for vehicle 155 gun bore cleaning and maintaining device, including power component and maintaining component, power component includes handle shell, the inside installation of handle shell has power motor, the output of power motor is connected big gear through the meshing rotation of tooth disc, one end center of big gear is fixedly connected connector, be equipped with external thread on the connector. The utility model through power component realizes stable deceleration and increases the twist through big gear, cooperation positive and negative rotation motor, can drive maintaining component high -efficient reciprocating cleaning, promotes the removal efficiency of pollutant, the threaded connection design of connector and connecting cavity is convenient for quick replacement copper wire brush, nylon brush different brush head, adapts to the diversification cleaning demand, both ends annular can accurate orientation positioning, avoid long rod cylinder deviation and scratch bore, simultaneously, the length of bristle adaptation guarantees clean dead angle, effectively prolongs the service life of gun barrel, satisfies the high efficiency and safety requirement of actual combat maintenance.

The present invention relates to a method for improving flight stability, effective range, accuracy, and destructive force by moving the center of gravity of a bullet (shell) forward, and the bullet (shell). To this end, the front part of a counterweight jacket of the bullet (shell) is designed to be thicker or higher in density than the rear part thereof, so that the center of gravity is naturally moved forward. This structural feature stabilizes the trajectory by minimizing the yaw angle during flight, and increases the force of impact transmission to the target. In addition, a material having a low specific gravity is used inside a gunpowder contact part and the rear part to further strengthen the effect of moving the center of gravity to the front part. The present invention can maintain a stable flight trajectory in both ground and underwater environments, and maximizes the performance of a bullet (shell) to increase an effective range, destructive force, and accuracy.

The invention provides a device (10) for producing a profiling on an inner wall of a projectile-guiding tube (12) by means of electrochemical machining, comprising a holder (20) which is intended for a projectile-guiding tube (12) and has, at two opposite ends, opposing centring elements (22) with a receptacle (24) for the tube (12) to be machined, and comprising a rifling cathode (18), which can be moved through the tube (12) to be machined, wherein at least one centring element (22) is axially adjoined by a guide body (28) which is intended for the cathode (18) and has a central clearance (30) concentric with the receptacle (24), wherein the rifling cathode (18) is driven in such a way that it can be moved into the guide body (28). The invention also provides a method for producing a profiling on an inner wall of a projectile-guiding tube (12) by means of electrochemical machining.

A firearm barrel has an elongated body defining a bore and defining a bore axis, the body defining a breech end and an opposed muzzle end, a chamber defined in the breech end and contiguous with the bore; the bore having an interior surface having a plurality of alternating lands and grooves, the grooves being surfaces separated from the bore axis by first radius, the lands being surfaces separated from the bore axis by second radius less than the first radius and the lands and grooves being straight elements parallel to the bore axis, such that no spin is imparted to a projectile propelled down the bore. The lands and grooves may extend from the chamber to the muzzle end. The bore may have a constant cross-sectional profile along its length.

The utility model provides a portable small-caliber electric bore wiping instrument which comprises a shell, a telescopic piece installed at the front end of the shell, a brush connected with the front end of the telescopic piece and extending out of the shell, and a rotating motor installed in the shell, and the front portion of the shell can extend into a gun barrel bore along with the brush. An output shaft of the rotating motor enables the telescopic piece to stretch out and draw back in the length direction of the shell through the transmission mechanism so as to drive the brush to do reciprocating linear motion to wipe the inner surface of the gun barrel and the bore. According to the transmission mechanism, the rotating motion of the rotating motor is converted into linear motion, the telescopic piece drives the brush to stretch out and retract back and forth relative to the shell, impact vibration is formed through the reciprocating motion, dust accumulated on the inner surface of a bore is removed through scouring, and the brush can move forwards along a rifling while stretching out and drawing back till the whole bore is swept once. When the device is retreated, the brush is kept in telescopic motion and returns along the rifling along the original path, and then the whole bore is swept once in an inserted mode.

A firearm receiver assembly comprises a receiver body, a top cover, and an ammunition advancing mechanism mounted on the top cover. The top cover is pivotably attached at a mounting portion thereof to a mounting portion of a receiver body for enabling the top cover to be pivotable about a top cover pivot axis between an open position and a closed position with respect to the receiver body. The top cover pivot axis extends parallel to a bore axis of the receiver body.

An integrally suppressed barrel system for a firearm, the system comprises a barrel having a series of transverse holes and a spiral groove forming machine-type threads of some dimension or specification, a gas block assembly configured to provide integration with the gas cycling system inherent to a firearm, a gas tube configured to protrude back into an upper receiver of the firearm, and a suppressor having a main housing. The main housing of the suppressor includes an inner wall, an outer wall, a series of holes and a base attached to the barrel through machine threads. The suppressor is fixed in a concentric pattern about the bore of the barrel.

In the presented solution, a body part (2) of a bullet (1) is made from material that is more resistant to deformation than lead. The bullet (1) includes a tapered front section (4) and a cylindrical section (3) that defines its outer diameter. The cylindrical section (3) includes on its outer surface grooves (8) in the longitudinal direction of the bullet (1). The grooves (8) reduce friction between the outer surface of the bullet (1) and the rifling of the barrel of the weapon and, thus, decrease heating of the bullet (1) and the barrel and enable the rifling of the barrel of the weapon to displace material from the outer diameter of the bullet (1) into the grooves (8).

The present invention presents in particular ammunition, for smooth or rifled barrel weapons dedicated to temporary neutralization, comprising a body of quasi-cylindrical general shape longitudinal along a central axis (X) which materializes the direction of the trajectory of the ammunition, the external surface of which is made of deformable material(s) adapted to absorb the energy of an impact on a target.

A kind of artillery barrel defect detection robot, including cleaning module, drive module and defect detection module, the drive module is the structure of variable diameter helical drive, its front end is connected the cleaning module, rear end is connected defect detection module, drive module movement brings cleaning module and defect detection module synchronous movement, it can carry out defect detection to the wear degree of artillery barrel internal rifling and barrel straightness, while robot carries cleaning brush, can simultaneously clean artillery barrel internal rifling, remove gunpowder residue, water vapor and other pollutants.

The utility model belongs to the technical field of toys, especially relates to soft glue head bullet structure, including soft bullet body and soft glue bullet head, the one end of bullet body is equipped with mounting hole, the one end of soft glue bullet head extends and has the connecting portion, the connecting portion is fixedly connected in mounting hole, the outside of soft glue bullet head is equipped with a plurality of airflow grooves, airflow groove is through to the both ends of soft glue bullet head, and with the axis of soft bullet body is inclined setting. This soft glue head bullet is in when passing the rifling, makes bullet rotate under the action of the rifling. And the outside of soft glue bullet head is equipped with a plurality of airflow grooves, and the airflow groove is inclined setting with the axis of bullet. Therefore, after bullet is launched, will form airflow in airflow groove, and the airflow in airflow groove will push bullet and rotate, increase the effect of bullet rotation, will make bullet keep stronger more far flat posture, makes bullet obtain farther range and accurate effect.

The utility model relates to the field of aiming devices, and discloses a multi-beam rifle sighting device which comprises a shell, a laser assembly is installed on the front surface of the shell, a protection assembly is arranged on the front surface of the laser assembly, an adjusting assembly is arranged on the inner wall of the shell, and the laser assembly comprises a fixing frame. The fixing frame is arranged on the inner wall of the shell, the inner wall of the fixing frame is provided with three sets of laser emitting devices, one set of laser emitting devices are fixedly connected with the closed shell, the other two sets of laser emitting devices are inserted into the inner wall of the closed shell, and the adjusting assembly comprises a fine adjusting assembly and a total adjusting assembly. In the utility model, the plurality of groups of laser emitting devices can be adjusted to be parallel by adjusting the fine tuning screw, and as one group of laser emitting devices is fixedly connected with the fixed frame, the rays of the three groups of laser emitting devices can be parallel to the rifling of the firearm by directly adjusting the position of the fixed frame.

The invention relates to firearms, and more particularly to a caseless bolt-action firearm. A caseless bolt-action firearm comprises a receiver (1) with a support (2), a bolt (63), a firing pin (36), a trigger (28), a magazine latch (27), a safety catch (31), a safety catch bracket (24), a trigger guard (3), an add-on stock (6), a grip (14), a magazine (15) and a barrel (18), wherein in the front part of the receiver (1) there is mounted a weapon chamber (17), and the bolt (63) contains a guide rod (41) for a conical bolt bushing, a triple-layered rifled cartridge (45) and a triple-layered smooth cartridge (44). The invention makes it possible to increase the operating reliability of a caseless bolt-action firearm in difficult conditions, easily eliminate delays, simplify loading and unloading, enable the firearm to operate reliably under combat conditions with forced feed of ammunition, including soiled ammunition, improve the stability of the projectile trajectory and increase firing accuracy both from stable positions and in the case of point shooting.

A gas block for a firearm has a main body and includes an adjustment screw. The adjustment screw in the gas block extends askew the longitudinal axis of the firearm when the gas block and adjustment screw are installed on the firearm. That is, a plane through the adjustment screw is neither coplanar with the longitudinal axis (i.e., bore axis) of the firearm nor perpendicular to the longitudinal axis of the firearm. In this manner, the adjustment screw is accessible through multiple vents or mounting holes through the handguard, and screwing the adjustment screw into or out of the main body adjusts an amount of pressurized gas allowed to flow from a barrel of the firearm back to a receiver of the firearm.

This invention relates to the field of artillery barrel life prediction technology, specifically to a method for predicting the remaining life of an artillery barrel. The method includes: acquiring experimental data from multiple firing operations; acquiring the wear amount per shot for various propellant charges during a single firing; acquiring the current rifling wear at a fixed point; and acquiring the remaining firing count for each propellant charge. This method can accurately determine how many rounds the artillery can fire before the end of its barrel life, thereby preventing premature projectile detonation and barrel explosion accidents.

The utility model provides a gas single-phase rotational flow SNCR (selective non-catalytic reduction) denitration spray gun, which belongs to the technical field of flue gas denitration and comprises a main gas pipe, a gas inlet pipe is mounted at one end of the main gas pipe, an anti-abrasion nozzle is mounted at the other end of the main gas pipe, a cooling sleeve is sleeved on the main gas pipe, a heat insulation layer is mounted on the cooling sleeve, and a compressed air pipe is further connected onto the cooling sleeve. A compressed air connector is formed in one end of the compressed air pipe, a plurality of riflings are arranged on the inner side of the main air pipe, and the riflings are formed by alternately arranging negative lines and positive lines in a spiral shape. The rifling is carved in the main gas pipe, so that gas flow can be rotationally jetted, the problems of poor penetrability and poor mixing effect of gas flow beams of a traditional single-phase spray gun are greatly improved, the denitration efficiency of SNCR (selective non-catalytic reduction) is improved, meanwhile, the spray gun can be protected and prevented from being abraded at high temperature, the service life of the spray gun is prolonged, and the service life of the spray gun is prolonged. And the problem of abrasion caused by long-term operation is reduced.

The present invention relates to rifled weapon barrels and sleeves (hereinafter this also applies for example to the bores of pistols and machine guns etc.) having a nitrided interior surface with a layer of thin dense chrome deposit thereon. The inventor has discovered that a thin dense layer of chrome having thickness of 0.0001 to 0.0002 inches unexpectedly falls within the tolerance of the bore of the barrel (and sleeved bore) as specified by the manufacturer, and the thin dense chromed rifle barrels, and sleeves, of the present invention unexpectedly do not need to be oversized as is the case with respect to chromed bores of the prior art (of standard thickness 0.001 to 0.005 inches). The additional benefit of the hardness of the rifle barrels and sleeves of the present invention unexpectedly do not have to be replaced as often as chromed barrels (and sleeves) of the prior art.

The invention relates to the technical field of firearms and ammunition, in particular to a shotgun capable of shooting a bullet screen through a standard chamber gun, which comprises a cartridge case, propellant powder packaged in the cartridge case, an edge ignition type primer mounted at the bottom of the cartridge case and a bullet head matched with an opening of the cartridge case, the bullet head comprises a hard bullet support, and the bullet support is of an integrated structure. A detachable bullet shell is arranged on the bullet support, the outer contour of the bullet support and the outer contour of the bullet shell are matched with a standard gun barrel rifling, a plurality of killing elements are filled in the bullet shell, and at least one indentation longitudinally extends from the tip to the tail of the bullet shell. According to the machine gun shotgun, after the machine gun shotgun is fired, the bullet shell is precisely split along the preset indentation and the fracture groove, the killing fragments and the killing elements are synchronously released to form a dense bullet screen, a target area is rapidly covered by means of the high initial speed and high radio frequency characteristics of a standard machine gun, and shooting-down is achieved by efficiently damaging key components of a low-speed small unmanned aerial vehicle.

The invention relates to a rifling cathode (18) for producing a profile on an inner wall of a projectile-guiding tube by means of electrochemical machining, having a cathode body (20) which comprises an electrically conductive material, having at least one exposed machining surface (22) which is formed from the electrically conductive material and, during a machining operation, causes material to be removed from a tube to be machined, wherein at least one exchangeable guide element (26) is fastened in a non-destructively releasable manner to the cathode body (20), which guide element guides the rifling cathode (18) along the inner wall of the tube during the movement of the rifling cathode (18) through the projectile-guiding tube, wherein a circumferential surface (28) of the guide element (26) projects beyond the machining surface (22) in the radial direction. The invention also relates to a method and to a device (10) for producing a profile on an inner wall of a projectile-guiding tube by means of electrochemical machining.

A firearm barrel, including rifling formed of an alternating, spirally-extending plurality of grooves and lands defining a twist angle adapted for imparting rotation to a bullet being impelled through the barrel from a chamber end to and exiting a muzzle end. The plurality of lands each include a reduced width component communicating with the chamber end of the barrel for a predetermined distance towards the muzzle end of the barrel. The reduced width component defines an acute angle in relation to a longitudinal axis of the barrel adapted to cause a bullet being fired from the firearm to prevent blow-by gases to exit the barrel in advance of the bullet. A method of forming the firearm and barrel is also disclosed.

The utility model relates to a rifling bullet and shotgun bullet comprehensive launching device, and belongs to the technical field of weapons. The shape of the comprehensive shotgun bullet corresponds to that of the rifling bullet, and the comprehensive shotgun bullet and the rifling bullet can be launched through the rifling The comprehensive shotgun comprises a comprehensive shotgun head and propellant powder; the comprehensive shotgun bullet head comprises a main bullet head and a sub-bullet head; when the rifling launching device is used for launching, the propellant powder generates impact force, the main warhead is rotationally launched through the rifling of the rifling launching device, the branch warheads are separated from the main warhead, and a shotgun launching mode is formed and launched to a shooting target. The rifling projectile can be launched, and the shotgun projectile can also be launched.

This invention relates to the field of gun barrel technology, specifically a method and structure for machining various types of gun barrel rifling using a CNC machine tool. The machining method includes the following steps: S1: Generate a three-dimensional model of the gun barrel rifling, dividing the gun barrel into three equal parts; S2: Machining the outer and inner diameters of the rifling inner wall tube, dividing the rifling inner wall tube into three equal parts; S3: Machining the grooves on the inner bore of each of the three rifling inner wall tubes, milling chamfers; S4: Welding the three rifling inner wall tubes together to form a single rifling inner wall tube, turning it to the specified design outer diameter; S5: Chamfering the weld joints on the end faces of the rifling outer wall tube, machining its inner bore and outer diameter; S6: Press-fitting the rifling inner wall tube into the rifling outer wall tube and welding its two end faces; S7: Precision turning the outer diameter of the entire rifling gun barrel, and boring the inner bore; This invention allows for custom rifling dimensions and machining of different types of rifling; no special equipment is required; the machining method is simple.

A 25 mm ammunition cartridge centered about a longitudinal axis and extending from a proximal end to a distal end including a case having a base defining the proximal end and a case sidewall extending from the base to a distal mouth and defining a case cavity, a propellant charge disposed in at least a portion of the case cavity, a body having a proximal cup and a body sidewall extending to a distal interface, wherein at least a proximal portion of the body is receivable in the case cavity distal to the propellant charge, a cap extending from a proximal cap portion coupled to the distal interface of the body to a dome defining the distal end of the cartridge, wherein the body and the cap define a projectile cavity, and one or more projectiles positioned within the projectile cavity.

A rifling cathode (18) for producing a profile on the inner wall of a projectile-carrying tube by means of electrochemical ablation is described, comprising a cathode body (20) that includes an electrically conductive material, with at least one exposed machining surface (22) formed from the electrically conductive material, which causes material removal from a tube to be machined during a machining operation, wherein at least one replaceable guide element (26) is detachably attached to the cathode body (20) in a non-destructive manner, which guides the rifling cathode (18) along the inner wall of the tube when it moves through the projectile-carrying tube, wherein a circumferential surface (28) of the guide element (26) projects radially beyond the machining surface (22).Furthermore, a method and a device (10) for producing a profile on an inner wall of a projectile-carrying tube by means of electrochemical ablation are specified.

The application discloses a reciprocating cleaning device suitable for a shallow-chambered gun barrel cleaning robot, which comprises a main machine, a stand fixedly arranged on one side of the main machine, an extension rod adaptively inserted into the top end of one side of the main machine, a cleaning brush fixedly arranged on the bottom end of one side of the extension rod, a fixing seat fixedly arranged on the top end of the stand, a frame fixedly arranged on the top end of the fixing seat, a gun barrel inserted into the inner cavity of the frame, a limiting rotating mechanism arranged on the top end of the frame, and a reciprocating driving mechanism arranged in the inner cavity of the main machine. The reciprocating cleaning device suitable for the shallow-chambered gun barrel cleaning robot can drive the cleaning brush to reciprocally extend leftward and rightward through the reciprocating driving mechanism, so that the interior of the gun barrel can be reciprocally cleaned. Compared with a one-way cleaning mode, the cleaning work can be more quickly and efficiently completed.

The invention discloses an artillery barrel with a replaceable lining and a method for prolonging the service life of the artillery barrel, the artillery barrel comprises a barrel body (1), a replaceable lining pipe (2) and a limiting plug (3), the replaceable lining pipe (2) is installed in the barrel body (1) through taper threads controlled by pretightening force, the screwing direction of the replaceable lining pipe (2) is consistent with an internal rifling, and the replaceable lining pipe (2) is screwed into the barrel body (1) by applying accurate axial pretightening force. In order to effectively resist huge alternating impact load during launching and prevent fatigue failure of a thread pair, an axial key groove and a positioning key (7) are arranged to guarantee consistency of shooting precision, and absolute accuracy of rifling winding angle positioning of the lining pipe is guaranteed. After being mounted, the lining pipe needs to be subjected to fine honing together with the muzzle part of the barrel to ensure that the inner wall is smooth and continuous. Through the targeted design, the problems of connection reliability, thermal load management, precision consistency and interface sealing performance under the extreme working condition of the artillery are systematically solved, the service life of a barrel system is remarkably prolonged, and the whole-cycle cost is reduced.

A 25 mm ammunition cartridge centered about a longitudinal axis and extending from a proximal end to a distal end including a case having a base defining the proximal end and a case sidewall extending from the base to a distal mouth and defining a case cavity, a propellant charge disposed in at least a portion of the case cavity, a body having a proximal cup and a body sidewall extending to a distal interface, wherein at least a proximal portion of the body is receivable in the case cavity distal to the propellant charge, a cap extending from a proximal cap portion coupled to the distal interface of the body to a dome defining the distal end of the cartridge, wherein the body and the cap define a projectile cavity, and one or more projectiles positioned within the projectile cavity.