FI82311B - GASDRIVEN PISTOL. - Google Patents

Description

, 82311

Gas powered pistol

The present invention relates generally to firearms, and more particularly to fully gas-operated pistols comprising a body unit forming first and second blocks extending to the front and rear ends thereof, respectively; a barrel unit comprising an axial bore having a mouth side and a cartridge housing side; a lock slider unit slidably supported on said frame unit and a preload member having a first end in contact with said frame unit and a second end in contact with the lock slider unit to force it forward; in the barrel unit, a gas passage allowing the expanding gas resulting from the firing of the bullet to act against the lock-supporting slide unit in a manner that forces it against the action of said preload member from a front position to a retracted position; and the bullet leaving the barrel mouth allows the slide-supporting slide unit 20 to be pushed back to the forward position by the preload member.

Numerous types of pistols are known which use gas-25 expandable in the barrel during projectile firing and to move the slider backwards to provide automatic or semi-automatic operation.

One such firearm is the pistol disclosed in U.S. Pat. No. 3,306,168, which is one of the structures closest to the prior art. This publication, and in particular Figures 15-31 thereof, shows a pistol in which the barrel of a weapon is provided with external threads at its rear end and attached to a threaded hole in the body which forms the handle of the pistol for a trigger, magazine, hammer, etc. On the underside of the barrel of the weapon is a lock-slide assembly that can be forced backwards against the springs by the gas pressure generated in the barrel as the bullet leaves. For this purpose, the barrel of the pistol is provided with a hole near its mouth and this 2 82311 hole leads to a channel below the barrel where a pin piston is located which points backwards in the pistol. In this pistol, the bullet first extends the length of the barrel and then just before it leaves the barrel, it passes said hole and 5 releases pressurized gas from the barrel through this hole into the channel below the pistol, thus pushing the piston pin backwards and forcing the lock-slide assembly backwards .

A similar pistol is disclosed in U.S. Pat. No. 3,273,460, in which the barrel of the pistol is provided with a plurality of holes in the vicinity of its mouth and these holes lead to the surrounding chamber, whereby the bullet passes these holes. sex backwards and then to operate the locking mechanism and remove the used sleeve.

U.S. Pat. No. 3,657,960 further discloses a pistol in which the barrel mouth is again provided with a hole through which, just before the bullet leaves the barrel, the pressurized gases in the barrel are brought into contact with firearm lock systems.

FR-1 266 597 describes the prior art in general.

· "25 These known pistols, which use expanding gases, i.e. gas-powered firearms, contain many components and are thus complex, difficult to disassemble and reassemble for cleaning and repair. They are also very expensive. In addition, they are not believed to be accurate enough and reliable.In addition, they are not normally designed for use with large-liberal cartridges such as .357 or .44-caliber cartridges, and they do not make the best use of • trigger gases.

The known disadvantages of previous types of gas-operated pistols are believed to be overcome with the new gas-operated pistol of the present invention 3,82311. The pistol according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The novel features of the invention are set out in detail in the appended claims. The invention will be best understood from the following description when taken in conjunction with the drawings.

Figure 1 is a side view of a new pistol, Figure 2 is an exploded isometric view of key components, Figure 3 is a cross-sectional view of a new barrel, Figures 4 and 5 are separate partial views useful in explaining important features of the invention, Figure 6 is a combination of side and cross-sectional views of the pistol , Fig. 7 is a side view of the new mandrel, and Fig. 8 is a combined cross-sectional and group view of the impactor unit.

20

The gas-operated pistol according to the invention will first be described with reference to Figures 1-4. The pistol 10 is assembled from three basic units or parts. They are a frame unit or simply a frame A, a barrel unit or simply a barrel B and a slide unit or simply a slide C. In addition, it contains other parts which will be described in detail. The latter, either as an integral part of or in support of one of the basic units, are generally referred to by a number followed by the letter 30 as an appendix to the unit to which it relates. As will be apparent from the following description of the gun 10, the body A, the slide C and the barrel B can be easily assembled and disassembled for maintenance and repair. Figure 1 shows the pistol fully assembled. The figure shows a side view of the pistol with the front end from which the bullet exits, denoted by 10f and its rear or stern by 10r.

4,82311

The front and rear ends of all, the body A, the barrel B and the slide C are denoted by the numbers 11 and 12, respectively, followed by the unit designation letter, for example 11A and 12A, 11B and 12B and 11C and 12C. In Figure 1, the gun 10 is a pre-5 slider C in its forward position.

As shown in Fig. 2, the body A is arranged to have a barrel mounting portion 13A, a trigger portion 14A, and a percussion unit fitting portion 15A. The portion 13A has a trough-shaped or U-shaped cross-section and is formed by vertical side walls 16A which are joined together by a base 17A (see Fig. 1). The elongate grooves 19A are formed in the side walls 16A to allow the barrel B rear end 12B to be locked to the body A. As shown, the barrel unit 15 has an axial barrel bore 15B extending from the barrel front end 11B forming the barrel mouth to the barrel end bore 12B forming the bore.

The barrel B further includes barrel front and rear locking members 19B and 20B at the front end 11B and near the rear end 20 12B, respectively. By means of these members, the barrel B can be releasably locked to the body A via a slide C. As will be described in detail below in connection with Figure 3, the barrel B includes a special channel for passing the gases produced in the cartridge housing through the barrel and the front locking member 19B, which gives the pistol some of its unique advantages.

The front locking member can be viewed as a piece comprising a gun front block with front sides or ends representing the front end 11B and opposite sides 22B against which the front end of the slider is preloaded, as will be described. The member 19B is specifically shaped to include two symmetrical cavities 21B extending inwardly from the side 22B. They are shaped and spaced apart so that the front ends of the side walls 16A of the body A fit 35 thereto, while the front end of the body base 17A fits into a recess below the side 22B (see Figure 1). Thus, when the barrel B is locked to the body A, the front end 11A of the body is fitted to the front locking member 19B. The latter is effectively wrapped around the front end 11A of the body s 82311 in this way, ensuring the connection of the two units of the front end and thus improving the performance of the gun.

5 In addition to the cavities 21B of the member 19B, a longitudinal cavity 25B is formed therein (see Figs. 2 and 3). The cavity extends inwardly from the surface 22B. The purpose of this cavity may be best explained in connection with Figures 2-5. Figure 3 is a substantially longitudinal sectional view of the barrel B. As shown therein, in addition to the bore 15B, a cavity or channel 30B is made therein. It starts from the cartridge housing 12B running parallel to the bore 15B below it, but separately from it and joins the bottom end of the cavity 25B. As is known, when a bullet leaves, combustible propellants produce high-pressure gas-15 and. In the present invention, these gases are caused to pass along channel 30B and exit through cavity 25B. The pressure of these gases is used to push the slide C backwards against the preload force provided by the system to be described.

20

Briefly, a spring-loaded prestressing assembly is located in the portion 13A of the body A, as shown in Fig. 4. It consists of two rods 25A on which the springs 26A are wound. The rear ends of the rods 25A are in the fitting grooves 25 of the body A in the wall 30A, while the other ends are supported by a horizontal plate which slides on the rods.

Referring now to Figures 1 and 5. Figure 5 is an end view of the slide C with the body A. As can be seen, a bridge-like member 15C is formed at the front end 30C of the slide C, which forms a bridge between the side walls 13C of the slide. The upper part of the bridge member 15C is concave to fit the upper barrel B. The cylindrical pin 20C protrudes from the member 15C. This pin or piston is fitted in the cavity 25B of the front locking member 19B. In addition, a downwardly pointing member or short protrusion 22C protrudes below the bridge member 35C 15C below the piston 20C. The protrusion 22C is pressed against the horizontal plate 32A. The cantilever does not extend over the entire width of the bridge when viewed from front to back.

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Suitable grooves 25C are formed on opposite sides 13C of slider C (see Figure 1) to assist in connecting the rear locking member 20B of the barrel B to the body A. The locking member 20B is connected through grooves 25C in the slider and grooves 19A in the body when the grooves 5 are aligned. the openings 21B of the front locking member 19B are fitted to the front ends of the sides 16A. The rear locking member 20B is then locked in place as its rear end presses against the wall 30A and the front end engages the locking cam, which can be actuated by turning the lever 35A (see Figure 10). It should be noted that various arrangements can be used to connect the stern end 12 of the barrel B through the slide C and lock it there.

Assembled as shown in Figure 1, the barrel B is locked to the body A. The springs 26A push the plate 32A forward, tensioning the slide C. The plate 32A pushes the protrusion 22C forward and thus forces the slide C forward. Assembled, the front end 11C of the slider abuts the rear wall 22B of the front locking member 19B, and the piston 20C is within the longitudinal cavity 25B. In this position 20, the slide is tensioned forward by springs 26A.

When the bullet leaves, the combustible propellants generate gases in the cartridge housing 12B of the barrel B. Due to the high pressure of the gas, the bullet flies out of the barrel. According to the present invention, as shown in Figure 3 and previously described, the gas passage 30B is located in the barrel. This channel begins in the cartridge housing where the gas pressure is very high and ends in the longitudinal cavity 25B. Thus, high pressure is formed there. Since the piston 20C of the Luis C is then in the cavity, it is subjected to high pressure and therefore protrudes axially outwards from the cavity 25B. Since the piston 20C is part of the bridge member 15C, which in turn is part of the slide C, the entire slide slides back against the spring preload force which forces it forward.

By using the pressure of the cartridge housing gases to drive the axial slide back, significantly improved performance is achieved.

• 35 7 82311

As the slide C moves backwards, the used cartridge is removed from the cartridge housing, and the hammer is tuned. Then, when the gas force is less than that provided by the springs, the slider moves forward, whereby a new cartridge is pulled out of the magazine 5 and inserted into the cartridge housing. Eventually, slide C returns to its forward position, and the pistol with its tuned hammer is ready to fire again.

Reference is now made to Figure 6, which is a combined side view of the front of the body 10A and an isometric view of the rear. There, the impact hammer 50A is shown in a tuned position below the lock lever. As will be shown hereinafter, the impact hammer is part of the easily removable impact hammer unit 55A. The entire hammer unit is held in place by two pins 56A and 57A that can be removed to repair or replace the hammer assembly. The pin 57A is generally covered by a guard or handle attached to the gun handle on which the magazine is typically mounted. The number 57A indicates the magazine latch.

20

As shown in Figure 6, the hook lever 80 protrudes from the impact hammer unit. It is essentially hook-shaped. Its function is to secure the trigger arm 82, which in turn is controlled by the trigger 60A of the gun.

25

The hammer tuning pulls the hook lever back. It, in turn, pulls the trigger arm 82 back, and the trigger pushes forward. When the trigger is depressed, the trigger arm 82 is pulled forward as it pulls the hook lever. When the water-30 is sufficiently advanced, the spring that holds the hammer tuned is released and the hammer strikes the striker (not shown).

As shown in Figure 6, the trigger arm 82 has two ribs 85 (one shown). When the lock 65C (see Fig. 1) 35 is turned to the lock position, the cam presses the ribs 85 inside the slide C. As a result, the trigger arm 82 is depressed, releasing the hook lever 80. Thus, pressing the trigger moves the trigger arm without touching the hook lever.

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As shown in Figure 2, the cartridge housing at the end of the bore 8 has locking shoulders. They are designed to cooperate with the locking shoulders of the spindle 35C in the slide C. Thus, the gun is of the lockable type- When the slide C moves axially with respect to the barrel, the spindle 35C must rotate slightly in addition to the axial movement with the slider to engage its locking shoulders. The spindle is typically an elongated cylinder with shoulders at one end. Previously, the mandrel has a shaped cavity 10 which is in the shape of a uniform thread and which extends through the center of the mandrel. The pin is fixedly mounted perpendicular to the central axis of the spindle. Although such an arrangement works satisfactorily, the spindle is disadvantageously weakened. According to the present invention, as seen in Figure 7, the mandrel 35C has a cavity 37C extending internally from the circumference of the mandrel. The cavity is shaped so that when the spindle 35C moves axially corresponding to the stationary pin, the spindle is at the same time rotating. When a cavity is formed in the spindle starting from its circumference, the spindle is considerably more reliable and its service life is much longer than with rotating spindles of the previous quality. A new spindle can be thought of as a spindle to which a fixed pin attached causes a rotational movement when the spindle moves directly.

25 As noted earlier, the trigger unit can be easily removed. On the other hand, according to the invention, the pistol can be provided with an adjustable two-step trigger unit. Both the trigger stroke length and pressure can be adjusted to suit the needs of an individual sniper. This unit 30 is shown in Figure 8. There, the numbers 101-104 indicate, respectively, the housing of the unit, the hammer spring, the hammer spring support and the member forming part of the separating lever which pivots about the pin 105. The number 106 indicates the spring used to maintain the traction pressure of the trigger • 35, while 107 indicates the pin around which the spring is tensioned. The number 108 indicates the nut-like part against which the other end of the spring 106 is pressed, while 109 indicates the pressure adjustment screw. The number 110 indicates the housing of the unit 9 82311, while 112 indicates the safety cover. Assembly pin 113 is also shown. 115 shows the impact hammer support and its pivot pin 116. Finally, the trigger pull length control lever is 117 and the adjusting screw 118.

5

As observed, the ends of the screws 109 and 118 are accessible from the outside. By turning the screw 109 inward to pull the trigger, more pressure is needed to pull the release lever to the right (as shown). The length of the trigger pull is determined by the screw 118. When the screw 118 is turned inward and contact is made between its tip and the part of the separating lever when the contact surface is indicated by 121, one length of the trigger pull is stabilized. Otherwise, the different pull lengths change as a function of the contact point 122.

15

Although various embodiments of the invention have been described and illustrated herein, it is to be understood that applications and variations may be readily developed by those skilled in the art, and thus the claims cover such applications and equivalents.

Claims (5)

10 8231 1 A fully gas operated pistol of the type comprising a body unit (A) forming first and second blocks extending to its front and rear ends, respectively; a barrel unit (B) comprising an axial bore (15B) having a mouth side (HB) and a cartridge housing side (12B); a lock-supporting slide unit (C) slidably supported on said frame unit (A) and a preload member (26A), the first end of which is in contact with said frame unit (A) and the second end is in contact with the lock-supporting slide unit (C) to force it forward; in the barrel unit (B), a gas passage (30B) allowing the expanding gas resulting from the bullet release to act against the lock-supporting slide unit (C) in a manner forcing it against the action of said preload member (26A) from the front position to the retracted position; and the bullet exiting the barrel mouth (11B) allows the lock-supporting slide unit (C) to be pushed back to the forward position by the preload member (26A) 20; characterized in that: the barrel unit (B) has front and rear locking members (19B, 20B) adapted to lock into the body unit (A) at its front and rear ends; the lock-supporting slide unit (C) is adapted to slide 25 between these front and rear locking members (19B, 20B); the lock-supporting slide unit (C) has at its front a bridge-like member (15C) to which the barrel fits and which connects the two opposite walls of the lock-supporting slide unit (C); Said second end of the preload member (26A) acts against the bridge-like member (15C); the piston (20C) protrudes from this bridge-like member X (15C); the barrel unit (B) has a cavity (25B) pointing rearwards 35 near its mouth (11B), which acts as a cylinder suitable for the piston for the piston (20C) of the slide-supporting slide unit (C); 11 8231 1 above the said gas passage (30B) connects the barrel bore (15B) of the cartridge housing-side directly on the piston in a suitable cavity (25B) of the bore (15B) independently such that just the barrel unit (B), the cartridge housing half (12B) of the gas-5 and is used to lock profitable to move the slide unit (C) backwards. A fully gas-operated pistol according to claim 1, characterized in that the front locking member (19B) of the barrel unit (B) further includes grooves (21B) for receiving at least two vertical side walls (16A) of the front part of the body unit. A fully gas-operated pistol according to claim 1 or 2, characterized in that the preloading member (26A) comprises two spaced springs arranged around the spring guides (25A) and located below the barrel. A fully gas-operated pistol according to claim 3, characterized in that said preload member (26A) further comprises a spring member sliding rod member (32A) and said bridged member (15C) includes a tongue member, wherein a force is applied to the piston to disengage the lock-supporting slide unit. , this tongue member (22C) pushes the rod-like member (32A) backward by the spring guide (25A), compressing the spaced springs. A fully gas-operated pistol according to claim 4, characterized in that said springs (26A) are helical in shape, each being formed of a plurality of twisted wires. i2 8231 1