Hand-held firearm with recoil attenuation

• US 5,581,046 A
• Filed: 12/02/1994
• Issued: 12/03/1996
• Est. Priority Date: 12/02/1993
• Status: Expired due to Fees

• Current Assignee: Heckler & KOCH GmbH (H&K AG)
• Original Assignee: Heckler & KOCH GmbH (H&K AG)
• Inventors: Albrecht, Hermann, Weldle, Helmut
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): Montgomery, Christopher K.
• Application Number:
  US08/349,635
• Time in Patent Office: 732 Days
• Field of Search: 89/196, 89/163, 89/177, 89/198
• US Class Current: 89/196
• 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

The invention discloses a hand-held firearm with a barrel assembly (2, 18, 36, & 54) moving back and forth essentially in or opposite the direction the weapon is fired in between a forward and a rear stop (44, 48, & 50) on or in a frame or grip assembly (12). A breech assembly (6 & 32) that moves back and forth essentially in the same direction as the barrel assembly between a forward and closed position and a rear and open position, moving out of the closed position and into the open position against the force of a closure spring (16) and, at the end of its return stroke, the frame or grip assembly or a component (64 or 64'"'"') resting off it. A buffering spring (66) tensions the barrel assembly toward the forward stop (44 or 50) and buffers its contact with the rear stop (44 or 48). The closure spring (16) and the buffering spring (66) are correlated to ensure that the breech assembly will strike the frame or grip assembly or the component supported off it essentially at the instant the barrel assembly comes into contact with the forward stop.

Claims

1. A hand-held firearm comprising

a) a barrel assembly, including two subassemblies, the first subassembly comprising a barrel having a fixedly attached projection and the second subassembly comprising a spring positioning rod and a fixedly attached barrel stop, the first subassembly being movable in relation to the second subassembly, and the second subassembly being movable along with the first subassembly between a forward stop and a rear stop disposed along a grip assembly;

b) a breech assembly including a movable breech block having a forward end, a recoil spring positioned about the spring positioning rod and having a spring force, the breech assembly moving back and forth essentially in the same direction as the barrel assembly between a forward and closed position and a rear and open position, moving out of the closed position and into the open position against the spring force of the recoil spring and, upon completion of the moving back and forth, the breech assembly rests against the grip assembly;

c) a buffering spring for tensioning the barrel assembly toward the forward stop and for buffering the contact of the barrel assembly on the rear stop; and

wherein

d) the movements of the recoil spring and the buffering spring are correlated such as to ensure that the breech assembly strikes the grip assembly essentially at the same time as the barrel assembly contacts the forward stop, thus reducing the momentum of the breech assembly onto the grip assembly by the momentum of the barrel assembly.

2. The firearm as in claim 1, wherein the breech assembly in the closed position interlocks with the barrel assembly.

4. The firearm as in claim 1, wherein the grip assembly is at least partly made of plastic composite.

5. The firearm as in claim 2, further comprising a clip and wherein

a) the grip assembly is a frame,

b) the breech block executes its return stroke adjacent to the clip,

c) the interlocking breech assembly and barrel assembly travel the initial phase of the return stroke interlocked until the barrel assembly strikes the rear stop and stops moving, and

d) the barrel projection engages during the initial phase of the return movement a barrel stop supported by the buffering spring on the grip assembly.

6. The firearm as in claim 5, wherein

a) the barrel pivots in the breech assembly, whereby

a1) the barrel includes a forward section which is supported by the forward end of the breech assembly;

and

a2) the barrel includes a rear section which tilts downward when the rear section contacts the barrel stop, and

b) the barrel projection and the barrel stop include complementary cam sections that disengage or reengage the barrel from the breech block so as to hinder

the barrel projection and barrel from engaging with each other and transmit motion in both directions while the breech block is disengaged from the barrel.

7. The firearm as in claim 6, wherein

a) the recoil spring is a helical spring which

rests on the spring-positioning rod located below and essentially parallel to the barrel and having a forward end

disposed on the forward end of the breech block and having a rear end disposed on the grip assembly,

b) the barrel stop disposed on the rear end of the spring-positioning rod, and

c) the spring-positioning rod moving back and forth against the force of the buffering-spring.

8. The firearm as in claim 7, wherein the buffering spring rests on the spring-positioning rod inside the recoil spring having a forward end positioned against a projection disposed on the spring-positioning rod, and having a rear end positioned along with the recoil spring on the grip assembly.

9. The firearm as in claim 8, wherein the projection is a bushing having a front end f which constitutes a rear breech-block stop disposed on the buffering spring against the frame.

10. The firearm as in claim 9, wherein the bushing controllably slides along the spring positioning rod and the buffering spring forces the bushing forward out of its disengaged position.

11. The firearm as in claim 10, wherein a transverse pin extends through a slot in the spring-positioning rod and is releasably secured to the bushing on both sides of the spring-positioning rod.

12. The firearm as in claim 9, wherein the bushing is secured to the spring-positioning rod.

3. A hand-held automatic firearm with a cartridge-chambering mechanism actuated by a breech assembly, comprising

a) a barrel assembly, including two subassemblies, the first subassembly comprising a barrel having a fixedly attached projection and the second subassembly comprising a spring positioning rod and a fixedly attached barrel stop, the first subassembly being movable in relation to the second subassembly, and the second subassembly being movable along with the first subassembly between a forward stop and a rear stop disposed along a grip assembly;

b) a breech assembly including a movable breech block having a forward end, a recoil spring positioned about the spring positioning rod and having a spring force, the breech assembly moving back and forth essentially in the same direction as the barrel assembly between a forward and closed position and a rear and open position, moving out of the closed position and into the open position against the spring force of the recoil spring and, upon completion of the moving back and forth, the breech assembly rests against the grip assembly;

c) a buffering spring for tensioning the barrel assembly toward the forward stop and for buffering the contact of the barrel assembly on the rear stop; and

wherein

d) the movements of the closure spring and the buffering spring are correlated such as to ensure that the breech assembly strikes the grip assembly essentially at the same time as the barrel assembly contacts the forward stop, thus reducing the momentum of the breech assembly onto the grip assembly by the momentum of the barrel assembly.