DE1251184B - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

Number:
File number:
Registration date:
Display day:

F41d

German class: 72 h -1/01

1 251 1S4
R 37279 Ic / 72h
February 22, 1964
September 28, 196 "

The invention relates to automatic firearms with a rigid or semi-rigid lock Closure that runs back against the action of a closing spring along a guide rod. Such weapons generally require a locking buffer, which absorbs the excess energy of the returning Can take up the closure harmlessly in order to destroy it in whole or in part or the closure - to initiate the closing process - to be fed back on its lead. The forward movement of the lock is brought about by the closing spring, which is often in a cylindrical Recess of the closure or a closure part is arranged. As excess energy the part of the kinetic energy is referred to here. which exceeds the tension work of the recoil spring.

The locking buffer is usually arranged in the rear part of the weapon and consists of many Compression springs, layered disc springs, friction springs or rubber springs. So far mainly The buffers used of this type were not always satisfactory because they were partly due to their weight and partly due to their weight their space requirements or are quite expensive in terms of production. They are also pneumatic or hydraulic buffers have become known for this purpose, but these have emerged from the the same reasons cannot prevail in practical application either. All known But locking buffers provide more or less additional facilities on the weapons represent.

The object of the invention is to create a satisfactorily operating lock buffering system, to be precise without the disadvantage of adding additional weight to the weapon or making it more expensive to manufacture Parts to be provided.

The inventive solution to this problem ordered that the closure or one with this connected locking part at the same time forms the cylinder of a locking buffer known per se. the piston of which is provided on the guide rod forming the piston rod.

The invention has a particularly advantageous effect on the rifle and rifles of a similar design known under the name G 3, since in these the breech block is connected to a breech block carrier which has a cylindrical penetration for receiving the closing spring. The invention can be implemented with these weapons in a relatively simple manner in that the cylinder of the locking buffering by closing the front end of the penetration on the front side with pneumatic buffering for automatic
Firearms

Applicant:

Rheinmetall G. mb H ..
Düsseldorf, Ulmenstr. 125

Named as inventor:
Theodor Löffler, Müllheim (Bad.);
Dipl.-Ing. Karl Harbrecht,
Eisental via Bühl (Bad.)

a lid is formed. This means that weapon parts are already available for other functions, namely the bolt carrier with closing spring tube and the spring guide tube as the main elements of the pneumatic Buffering used. The invention even brings a weight reduction here and in addition a reduction in manufacturing costs, since that previously provided in the base piece or in the shoulder rest No buffer is required.

The buffering according to the invention can be varied in many ways, for example in the cylinder wall one or more exhaust or intake openings which can be closed by the piston be provided, or else - in a known manner - the piston with a Be provided throttle bore. These measures may each depend on the particular Requirements are met, d. H. depending on whether only part of the kinetic energy is absorbed elastically and the leading closure is to be fed again, or whether the excess Energy should be completely destroyed.

In the drawing, an embodiment of the invention is shown in an automatic weapon with a semi-rigid breech. The housing of the weapon is denoted by 1 , in which the barrel or the core tube 2 is attached to the locking piece 3. The lock consists essentially of the lock head 4 and the lock carrier 5, which has a tubular extension above the core tube, the closing spring tube 6 , which is guided in the through-loading tube 1 attached to the housing 1. The lock is arranged to be longitudinally displaceable in the housing and, after it has run back after the shot has been fired, the recoil spring 7 returns it to its front closing position.

709 649 35

Claims (6)

brucin. The spring filing tube 8, which is fastened in the rear part of the housing * - is used to hold and guide the closing spring. The spring guide tube protrudes into a cylindrical recess 9 of the bolt carrier and into the adjoining closing spring tube. At its front end it carries a piston 10, which is held in the spring guide tube by means of a pin 12 and may consist of plastic or some other suitable material. By sealing, e.g. B. screwing in a lid 13 - which can also be made of plastic expediently - in the Becere lintle of the closing boom tube. the compression space of a pneumatic cylinder is created between the cover 13 and the piston 10. The closing spring 7 arranged on the conveyor tube is clamped between the rear floor plate 14 of the housing and a support ring 15 displaceably mounted on the spring guide tube, a shoulder 16 provided in the cylindrical recess 9 forming an abutment for the support ring. When the bolt runs back due to the gas pressure occurring during the shot, the closing spring is tensioned and at the same time the air located between the cover 3 and the piston 10 is compressed, whereby a buffer effect corresponding to the adiabatic compression is achieved. The amount of compression can be changed depending on the amount of energy to be destroyed by making a small bore 17 in the piston or in the cover. In the exemplary embodiment, a small bore 18 is also provided in the front area of the cylinder wall (closing spring tube 6). Shortly before the end of the closure return, this bore is closed by the piston 10, whereby at the moment of the reversal of the closure a somewhat stronger compression occurs, which is fed back to the subsequently advancing closure. Furthermore, for this purpose the piston can have a pin 19 protruding over the edge of the piston, which dips into a recess 20 provided on the inside of the cover 13 at the end of the closure return. These measures can be used individually or together. In the exemplary embodiment, the atmospheric air is provided for the pneumatic buffering. However, it is also possible to provide an enclosed gas in the cylinder, or else a gas for the cylinder. for example, to supply the gas to the vei burned propellant charge. Patent claims: 1. Automatic gun with a rigid semi-rigid Odei locked closure which runs back against a Fiihrungsstange ök action of a closing spring Iimgs since c1 urchgeke η η ζ e: c Ii net. that the closure (5) or a closure part (6) connected to it at the same time the; Forms cylinder of a known locking buffer, the piston of which is provided on the guide rod (8) forming the piston rod. 2. Automatic weapon according to claims !; 1. hey; which the closure or a closure part connected to it has a cylindrical penetration for receiving the closing spring, characterized in that the cylinder of the closure buffering is achieved by welding the front end of the penetration on the upstream side; a cover (13) is formed. 3. Automatic weapon according to claim! or 2. characterized in that the piston (10) in a known manner has a pin (19 J) protruding over the edge of the piston, which at the end of the locking advance in one of the diameter of the pin (19) dimensioned accordingly, on the inside of the Zy hand cap provided recess (20) is immersed. 4. Automatic weapon according to claim 1 to 3, characterized in that either the front cover (13) forming the cylinder closure or the piston (10) has a blow-out or suction bore (17) in a manner known per se. 5. Automatic weapon according to claim 1 to 3, characterized in that one or more exhaust or suction openings (18) which can be closed by the piston are provided in the cylinder wall in a manner known per se. 6. Automatic weapon according to claim 1 to 3, characterized in that the cylinder is a contains pressurized gas. Considered publications:
German Patent No. 328 901:
Austrian patent specification No. 78 750:
U.S. Patent No. 2,213,953. 1 sheet of drawings 709 649 3 5 9. 67 G Bnndtsilruclicrei Btrlin