13 results about "Caliber" patented technology

A system and method for the determination of an optimal ammunition round based upon a barrel length of a given firearm and resulting ammunition. The ammunition is preferably provided in a single load for a given caliber and bullet optimized for a range of barrel lengths, wherein a user can select a preferred single load for a given firearm regardless of barrel length.

The present invention relates to a gun barrel 10 with a hinged caliber ring 20, wherein the caliber ring 20 is movable from a first position to a second position, wherein in the second position the caliber ring 20 reduces the gap between the wall of the gun barrel 10 and the weapon 50 arranged in the gun barrel 10, wherein in the first position the caliber ring 20 rests against the wall of the gun barrel 10, characterized in that the caliber ring 20 is made in one piece, wherein the caliber ring 20 is pivotable about a horizontal axis of rotation 22 between the first position and the second position.

The utility model provides a GIS (Gas Insulated Switchgear) butt joint shell. The GIS butt joint shell comprises a barrel body, a first flange and a second flange, the caliber of the barrel body gradually changes in the axial direction of the barrel body; the first flange is fixedly arranged at the opening position of one end of the barrel body, and the second flange is fixedly arranged at the opening position of the other end of the barrel body; wherein the aperture of the first flange is larger than that of the second flange, and a connector of the first flange and a connector of the second flange are both eccentrically arranged. According to the butt joint shell, the caliber of the barrel body is gradually changed in the axial direction of the barrel body, so that the caliber of the barrel body can adapt to flanges with different calibers, and the shells with different calibers at the two ends are in butt joint. Moreover, through the eccentric design of the flanges fixedly connected with the two ends of the barrel body, butt joint of the shells with the offset at the two ends can be achieved, a displacement compensation structure does not need to be additionally arranged or an L-shaped bus does not need to be used for butt joint, and therefore the complexity of the shells after butt joint is effectively reduced.

The invention relates to an inner ballistic trajectory design method for a floating series double-chamber balance gun. The inner ballistic trajectory design method comprises the steps of dividing an inner ballistic trajectory process period, establishing a gunpowder combustion model in a main chamber and an auxiliary chamber, establishing a projectile motion model, establishing a balance body motion model, establishing an auxiliary chamber motion model and establishing an inner ballistic trajectory energy conservation model. Based on a novel floating series-connection double-chamber structure for a balance gun, construction of an inner ballistic model is completed, and optimization design is conducted on the chamber structure and charging parameters. The problem that a large-diameter barrel weapon generates high bore pressure under the high initial speed index can be effectively solved. On the premise that the maximum chamber pressure is not increased, secondary acceleration of the projectile is achieved, and the outlet speed and the flight performance of the projectile are remarkably improved. According to the method, an important theoretical reference and a practical technical method are provided for design and development of the high-initial-speed large-caliber balance gun in the future, and the method has wide application prospects and great military value.

A multi-caliber firearm includes a barrel extension configured to connect to an interchangeable barrel that is selected from at least two predetermined caliber sizes. An interchangeable magazine well receives a magazine that is selected to house cartridges from the predetermined caliber sizes. The magazine well includes a first end facing towards the stock and a second end facing towards the barrel extension. A bolt carrier group includes a bolt carrier and a bolt. A reverse movement unloads a used cartridge from the bolt and a forward movement loads a new cartridge from the magazine. The bolt carrier group receives an interchangeable bolt that is selected to load and unload one of the predetermined caliber sizes. The bolt includes a longitudinal cartridge retaining notch facing towards the magazine. The cartridge retaining notch is configured to retain the new cartridge in the magazine during the reverse movement.

The invention relates to a coding security system for firearms (1, 1a) of the same type of weapon but different calibers to prevent the exchange of at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a), comprising: - at least one first firearm (1) of a first caliber or at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) thereof, - at least one second firearm (1a) with a second, different caliber or at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) thereof, - at least one first safety device on the first and / or second firearm (1, 1a) or the at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a) thereof, designed to prevent the attachment of at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) of the at least one first firearm (1) to the at least one second firearm (1a), and at least one second safety device on the first and / or second firearm or the at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) thereof, which is designed to prevent the attachment of at least one weapon component (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) of the at least one second firearm (1a) to the at least one first firearm (1). The invention further relates to weapon components (2, 2a, 3, 3a, 7, 7a, 8, 8a, 11, 11a, 19, 19a, 37, 37a) and firearms (1, 1a) for use in the coding security system.

1. Name of the product in this design: Automatic Rifle (7.62 mm Caliber Type A). 2. Purpose of this design: An automatic rifle. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a movable support for a large-diameter balance gun and a using method of the movable support. The movable support is used for solving the problems that the large-diameter balance gun is low in short-distance movement flexibility, high in cost, long in consumed time and large in work amount. The support comprises a concrete base, a steel plate, an iron box, wedges and a frame body, the steel plate is fixed and matched in a guide groove of the concrete base, the iron box with a fixed pulley and a connecting ring is arranged on the steel plate, the iron box is provided with a plurality of groups of two crossed and overlapped wedges, the wedges are provided with the frame body for bearing a gun body, bolts vertically penetrate through through holes in the two sides of the frame body, and nuts concentric with the bolts are arranged. During use, the iron box is driven to move to a target position through tension, the jack is matched with the wedge to adjust the height of the frame body, and the bolt calibrates the frame body to be horizontal. The device does not need to depend on large engineering equipment, is flexible to move, can quickly complete position adjustment and fixation, reduces the comprehensive cost, meets different test target position requirements, adopts conventional components, is low in manufacturing cost, is high in practicability, and is suitable for large-caliber balance gun target range test scenes.

1. Name of the product in this design: Automatic Rifle (5.56 mm Caliber Type C). 2. Purpose of this design: An automatic rifle. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

A projectile may be formed having a caliber in the range from 4.6 mm to 20 mm for ammunition. The projectile may be a deformation bullet, a partial fragmentation bullet, a partial or full jacket bullet, a hard-core bullet or tracer bullet. The projectile may be formed by cold forming, in particular extrusion, from an intermediate with a tube section of substantially constant wall thickness, which constitutes at least 50% of the longitudinal extension of the intermediate.

1. Name of the product in this design: Automatic Rifle (7.62 mm Caliber Type B). 2. Purpose of this design: An automatic rifle. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This invention provides a method for measuring the bore caliber of a gun barrel. The specific process is as follows: Based on the inner wall contour image of a standard ring gauge, a three-dimensional laser point cloud of the standard ring gauge is obtained; a point P is randomly selected in the three-dimensional laser point cloud, and multiple planes containing point P are created to intersect the three-dimensional laser point cloud; for each intersecting elliptical cross-section, the point with the largest distance from point P is selected, and multiple selected points form a point set N; the point with the smallest distance from point P in the point set N is obtained, and the smallest distance is used as the pixel distance of the standard ring gauge, and the physical distance corresponding to a single pixel is calculated; based on the bore image of the gun barrel, its three-dimensional laser point cloud is obtained, and the point cloud of the plane containing the point with the smallest distance in the bore image of the gun barrel is obtained for curve fitting, and the diameter of the inscribed circle of the curve is calculated; based on the physical distance corresponding to a single pixel and the pixel diameter of the inscribed circle of the bore, the inner diameter of the bore is calculated, thereby realizing the measurement of the bore caliber.

The invention relates to a large caliber weapon comprising a breech assembly (4) including a breechblock (5) integral with a weapon tube (3), a breechblock support (6) movable in axial translation relative to the breechblock (5) and coupled to a breech head (7), characterized in that the breech assembly (4) further comprises a plurality of loading chambers (8) each intended to receive a round, a chamber (8) displacement mechanism (9) configured to support the chambers (8) and successively place one of the chambers (8) in a firing position, namely between the breechblock (5) and the breech head (7) and in alignment with the longitudinal axis of the weapon tube (3), and at least one other chamber (8) in a feeding position, in which at least one chamber (8) is capable of receiving a round through its rear end (8b),and a locking mechanism (10) configured to move the breech head (7) and the chamber (8) in the firing position between an unlocked position and a locked position, wherein the chamber (8) is closed at its rear end (8b) by the breech head (7) and opens at its front end (8a) into the weapon tube (3). Figure to be published with the abbreviation: Figure 1.