Firearm, particularly handgun

• US 5,309,815 A
• Filed: 03/24/1992
• Issued: 05/10/1994
• Est. Priority Date: 03/25/1991
• Status: Expired due to Term

• Current Assignee: Heckler & KOCH GmbH (H&K AG)
• Original Assignee: Heckler & KOCH GmbH (H&K AG)
• Inventors: Weldle, Helmut, Moller, Tilo, Brandl, Rudolf
• Primary Examiner(s): BENTLEY, STEPHEN
• Application Number:
  US07/857,028
• Time in Patent Office: 777 Days
• Field of Search: 89/163, 89/177, 89/178, 89/196
• US Class Current: 89/163
• CPC Class Codes: F41A 3/86 mounted under or above the barrel
• CPC Class Codes: F41A 5/04 the barrel being tilted during recoil

Abstract

Locked automatic pistol in connection with which the recoil-produced delivery of momentum of the barrel (2) is buffered.

Claims

1. A firearm comprising:

a housing including a magazine shaft to receive a plurality of cartridges;

a frame;

a barrel;

a breechblock slidable along a travel path with respect to said frame and barrel;

first force receiving means for locking said barrel with said breechblock for a first position of the travel path and for unlocking the breechblock from the barrel after reaching an end of the first position of the travel path so that the breechblock can continue movement along a remainder of the travel path on its own;

second force receiving means with said breechblock being mounted so as to be movable over a second predetermined path so as to take up a part of the fire recoil and transmit it, after passage over the second predetermined travel path, to the second force receiving means;

first buffering means provided between the frame and the barrel for buffering movement of the unlocked barrel so as to avoid unbuffered impact of the barrel onto the frame;

automatic loading means for automatically introducing a cartridge into the barrel after each shot, said automatic loading means including said barrel, said first force receiving means and said first buffering means, with the breechblock being provided so as to, upon firing, carrying out a return, opening movement past the magazine shaft up to a rear point of reversal and then an opposite forward, closing movement into a "ready-to-fire" position, the barrel, when locked to the breechblock in the ready-to-fire position, moves together with the breechblock through an initial phase of the opening movement, travels, after passing over the first portion of the travel path, onto the first force receiving means and is unlocked thereby, releases the breechblock for loading and, finally, after loading, returns together with the breechblock to the ready-to-fire position, and the first force receiving means including a spring-loaded barrel stop, the barrel having an attachment part that engages the barrel stop.

2. The firearm according to claim 1, and further comprising second means for buffering transmission of recoil from the breechblock to the second force receiving means.

3. The firearm according to claim 1, wherein the first and second force receiving means are buffered by the first buffering means.

4. The firearm according to claim 1, wherein the second force receiving means includes a breech stop, at least one of the breech stop and a part of the breechblock traveling onto the breech stop being under spring action.

5. The firearm according to claim 1, and further comprising an additional breech spring arranged so that the breechblock carries out the return, opening movement against the action of the breech spring and the forward, closing movement under the action of the breech spring.

6. The firearm according to claim 5, wherein

the barrel is mounted swingably in a closure part so that a front section of the barrel is supported by the breechblock, and so that a rear section of the barrel is lowered upon running onto the barrel stop the barrel attachment part and the barrel stop having elements of a cam control which are complementary to each other and act so as to move the barrel out of its locked engagement with the breechblock and subsequently back into it.

7. The firearm according to claim 6, wherein

the breech spring is a coil spring that is seated on a guide rod which is arranged under the barrel substantially parallel to the barrel, the breech spring having a front end that rests on a front side of the breechblock (6) and a rear end that rests on the frame,

the barrel stop being provided on a rear end of the spring guide rod, and

the spring guide rod being longitudinally movable against the action of a buffer spring.

8. The firearm according to claim 7, wherein the buffer spring is seated within the breech spring on the spring guide rod, rests at its front end on a projection of the spring guide rod (36) and with its rear end, together with the breech spring, on the frame.

9. The firearm according to claim 7, wherein the rear end of the spring guide rod is provided has a lower side facing away from the barrel that is provided with a guide surface which cooperates with a guide element secured to the frame.

10. The firearm according to claim 9, wherein the guide surface is a recess.

11. The firearm according to claim 10, wherein the guide element is a transverse bolt.

12. The firearm according to claim 11, wherein the transverse bolt rests in a support part which is fixed to the frame, the buffer spring and the breech spring rest on a front end of the support part, and sections of the spring guide rod located on both sides of the guide recess slide on a surface of the support part which faces them.

13. The firearm according to claim 7, wherein the buffer spring is arranged so that after the barrel has moved over the buffer path, the buffer spring moves the barrel forward over the buffer path before the breechblock has reached the breech stop.

14. The firearm according to claim 8, wherein the projection is a bushing that has a front end that forms the breech stop.

15. The firearm according to claim 14, wherein the bushing is arranged to be displaceable over a limited distance on the spring guide rod so that in a rest position the bushing is pressed forward by the buffer spring.

16. The firearm according to claim 14, wherein the bushing is firmly connected to the spring guide rod.

17. The firearm according to claim 11, wherein the guide recess [(42) is provided at its rear end with a depression into which the guide transverse bolt is engageable in a rest position.

18. A firearm according to claim 1, wherein said firearm is a handgun.

19. A firearm according to claim 1, wherein said barrel attachment part is spring-loaded.