DE2302785A1 - FIRE ARM WITH PIPE MAGAZINE - Google Patents

Description

DR.-INO. DIPL. -INQ. M. TC. DIf l _.- PHY «5. D R. DIPL. -PHYB.

HÖGER - LEGAL RIGHT- GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

A 39 930 b
January 15, 1973
k-35

Hiroshi Itagaki Aichi-ken, Japan 12, Aza Minamigahara, Onishi-cho, Okazaki-shi

Firearm with barrel magazine

The invention relates to a firearm with a tubular magazine arranged parallel to the barrel for feeding projectiles with a bushing mounted on the magazine so that it can slide, with a piston that is pushed by the under.high pressure standing gas is driven, which is generated in the barrel when the firearm is fired, and through which the Socket is slidable back to the sleeve of the shot Eject the bullet and reload a new bullet into the bullet chamber.

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ORIGINAL INSPECTED

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The invention is thus concerned with a mechanism for automatic Pulling out the case of a fired lock and reloading a new projectile, especially in one Rifle or shotgun.

Firearms of the type described above are known and their structure is explained in detail below in the context of the detailed description are explained in more detail.

A disadvantage of the known firearms has proven that the automatic ejection of the projectile cases and reloading directly dependent on the when-firing the Projectile resulting explosion pressure is dependent and that especially with an extremely high explosion pressure, v / ie he depending on the type of projectile used and depending on the tolerances and mixtures of the propellant charges damage to the ejection and reloading mechanism can occur due to overstressing of the individual Parts are due.

The invention was therefore based on the object of proposing an improved firearm with a barrel magazine in which the influence of the respective explosion pressure on ejection and reloading is at least essentially switched off and at ejecting and reloading with the help of a predetermined gas pressure even in the event of extremely high explosion pressures done gently and evenly, so that overuse individual parts are avoided and the safety of the shooter is increased.

In the case of a firearm, this task is the one described at the beginning Art solved in that at least one second spring-loaded piston is provided, which with the first piston in such a way cooperates so that the first piston starts to move

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is driven after the second piston has been driven to move against the spring force.

According to the invention, it is therefore preferable to leave the one when firing The high gas pressure generated by a projectile initially acts on a spring-loaded piston, which is counteracted by the gas the spring force is shifted. If then the first piston has moved a little as a result of the gas pressure, this is a connection to the barrel interrupted, so that the movement of the first piston is practically only a function of the Spring force takes place, which can be set to the desired value.

Further details and advantages of the invention are provided below explained in more detail with reference to a drawing and / or are the subject of the claims for protection. In the drawing show:

Fig. 1 is a side view of the essential parts

a first embodiment of an inventive Firearm partly in section,

FIG. 2 shows a representation similar to FIG. 1, but shortly after a projectile has been fired,

Fig. 3 corresponds to the operating states according to Fig. 1 and 2

vmd 4

Speaking, enlarged cross-sections through the

essential parts of a firearm according to the invention and

5 shows the Figure 3 and 4 are corresponding views for ^un a second embodiment of an inventive firearm..

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January 15, 1973 τοπιτοί:

k-35 / OUZ / OO

Before the details of the invention are described below, it should first be repeated with reference to FIGS. 1 and 2 a common mechanism for unloading and reloading in a barrel magazine firearm will be explained. In Fig.l and 2, reference number 1 denotes the lock, while reference number 2 denotes the barrel. With 3 is a locking bolt referred to, which is used to lock a bolt 4 in its position. Numeral 5 denotes a tubular one Magazine, which is arranged below the barrel 2. The reference number 6 denotes an inertial mass or a bushing which is mounted on the magazine 5 so as to be slidable.

When the firearm has been fired, some of the high pressure gas enters the barrel through an opening in the wall of the barrel and diverted through an opening in the wall of the magazine into the magazine to there a piston actuate, which moves the bush 6 backwards. An actuating rod 7, which is vex'bunden or is formed in one piece with this, drives a connecting piece 8 to the rear, which in turn is a spring compresses, which are arranged in the piston V '(not shown) is. During the movement of the actuating rod 7, the block 4 is unlocked and, as FIG. 2 shows, moves backwards. The energy stored in the spring 9 and / or in a return element for the bolt 4 then causes a Movement of the bolt 4 forward, where it is locked again in the position shown in Fig.l.

During the movement of the locking bolt 3 to the rear, the unlocked bolt 4 releases the case of the projectile fired, so that it can be ejected and that a new bullet can also be reloaded into the bullet chamber. Afterward the bolt 4 is then moved forward and for the

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next shot locked. The mechanism and mode of operation described above are
State of the art, so it is not necessary to explain it in detail.

As is known, the processes described above run in
a very short time. The force which is transmitted to the socket 6 when the firearm is fired must, however, be large enough to compress the spring 9, since otherwise a new bullet cannot be completely reloaded. However, if the force acting on the bush 6 is unnecessarily great, the ejecting and reloading mechanism is suddenly stressed, which can damage it. In addition, the stroke affects the shooting accuracy.

The disadvantages outlined above are in the inventive Firearm avoided in which the socket 6 is driven with a predetermined constant gas pressure. The invention will be explained in detail below.

According to the invention, in addition to the usual first piston 13 for actuating the socket 6, a spring-loaded second piston IO is provided, with the aid of which the desired pressure for the ejection and reloading process is set and which is provided at the front end of the magazine 5, with between
A helical spring 11 is arranged on this second piston and a cap 12 closing the magazine 5.

The first piston 13 is hollow and is arranged in the magazine 5 in a position behind the second piston 10. The first
Piston 13 is designed so that aer when shooting in the barrel

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generated gas pressure can act on him in such a way that he moves the socket 6 backwards. For this purpose, a channel 14 is provided between the barrel 2 and the magazine 5, via which the high pressure gas can enter the cavity in the first piston 13 when the channel 14 with an opening 15 in the cylindrical side wall of the hollow first Piston 13 is aligned (see. Fig. 1 and 3). The hollow first piston 13 is guided during its sliding movement by a pin 16 at its rear end (left side in the figures). The ends of the pin 16 engage in slots 17 in the wall of the magazine 5. A ring element 18, which is held on the outside of the magazine 5 by the ends of the pin or pin 16, on the one hand, together with corresponding stops on the outside of the magazine, determines the rest position of the first piston (see FIG. 1) and serves ¹ to move the other hand to at displacement of the first piston 13 under the action of the gas pressure acting on it, the sleeve 6 backwards. The rearward displacement of the first piston 13 is transmitted to the bushing 6 in that one end face of the ring 18 rests against the end face of the bushing 6 facing it and it moves backwards from the position shown in FIGS. 1 and 3 shifts to the position shown in Figures 2 and 4 to initiate withdrawal of the case of the fired projectile and to reload a new projectile, as explained above.

As is clear from the drawing, the first hollow piston 13 has a further opening 19 on its second piston 10 facing face. The gas pressure, which causes the first piston 13 to move the sleeve 6, acts over the opening 19 so also the second piston 10. By this gas pressure, the second piston 10 is counter to the force of the

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January 15, 1973 ο ο η ο * 7 η r

Helical spring 11 moved forward. The gas-operated first piston 13 is thus displaced rearward when the gas pressure has moved the second piston 10 for pressure regulation against the force of the spring 11 a certain 'piece forward.

As soon as the first piston 13 begins to move backwards, the opening 15 is displaced relative to the opening 14. on in this way, a further flow of the gas under high pressure into the cavity of the first piston 13 is interrupted.

As a result of the construction according to the invention, the hollow first Piston 13 is not charged with all of the gas which flows into it when the opening 15 is aligned with the channel 14. The gas under high pressure which enters the cavity of the first piston 13 initially drives the second Piston 10 against the force of the coil spring 11 forward, whereby the gas pressure is lowered to a level which is determined by the elasticity of the spring. After that, i.e. as soon as the backward movement of the gas-actuated first piston 13 has started, the flow of the high pressure gas into the cavity of the piston 13 is interrupted because the Opening 15 is moved into a position in which it is no longer aligned with the channel 14.

The gas-actuated first piston 13 is therefore acted upon by a constant, predetermined gas pressure regardless of the characteristic properties of the projectile fired. In this way it is prevented that an excessive shock or blow is exerted on the movable bush 6 and the corresponding parts of the locking bolt 3, the bolt A _{1 of} the spring 9 etc. as well as on the shooter.

In the embodiment described above, the second piston 10 for pressure regulation between the gas-actuated

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th first piston 13 and the cap 12 closing the magazine. As is clear from FIGS. 5 and 6, according to FIG Another embodiment of the invention has the pressure regulating second piston also within the gas actuated first one Be arranged piston.

As Figure 5 shows, the pressure-regulating piston 1Oa and the coil spring lla inside the gas-operated first Piston 13 can be arranged in such a way that the gas pressure created in the second piston 13 acts on the piston 10a and compresses the spring 11a, the first piston 13 finally being controlled by the helical spring 11a acting on it is driven, as Fig.6 shows. This arrangement and the displacement of the opening 15 with respect to the channel 14 are used for this purpose to keep the driving force acting on the bush 6 at a predetermined level.

The force that drives aen gas-actuated piston 13 can also be controlled by the channel 14 and / or the opening 15 forms a slot in the longitudinal direction of the barrel or gives them another suitable shape. One Another possibility to regulate the movement of the socket 6 or to adjust the firearm to different types of projectiles, consists üarin to make the cap 12 adjustable by means of a thread and / or to exchange the spring 11.

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Claims (1)

A 39 930 b - 9 - January 15, 1973 Patent claims: 1.) Firearm with a tubular parallel to the barrel Magazine for feeding projectiles with a bushing mounted on the magazine so that it can slide, with a piston that can be driven by the high pressure gas generated in the barrel when is shot with the firearm, and through which the socket can be slid backwards around the case of the fired Eject the projectile and reload a new projectile into the projectile chamber, characterized in that that at least one second spring-loaded piston (ICf) is provided, which with the first piston (13) in such a way cooperates that the first piston (13) is driven to move after the second piston (10) to move was driven against aer spring force. 2. Firearm according to claim 1, characterized in that the second piston (10) and a spring acting on it (11) are arranged between the first piston (13) and a cap (12) at the front end of the magazine (5). 3. Firearm according to claim 1, characterized in that the second piston (10a) and the spring acting on it (Ila) are arranged within the first piston (13). 4. Firearm according to claim 1 to 3, characterized in that the first piston (13) is hollow and one Contains chamber to which the gas under high pressure can be supplied via an opening (15) provided in the piston wall is when this with a channel between the barrel (2) and the magazine (5) in the rest position of the first piston (13) is in line with the connection between the opening - 10 - 409831/0483 A 39 930 b IO - January 15, 1973 (15) and the channel (14) is interrupted / as soon as the first piston (13) moves a predetermined distance backwards Has. 409831/0483