Buffer assembly
OwnerDimitrios Mantasinventor
Life of this patent
Estimating the term…
Abstract
A buffer assembly has a rod, a cap having a forward end against which a bolt carrier pushes during a firing cycle, the cap being movable along the rod, a shock absorbing plug attached to a rearward end of the rod for engaging an end wall of a receiver extension during an intermediate part of the firing cycle, a buffer tube moveable on the rod, a buffer spring engaged between the plug and the buffer tube for biasing the buffer tube toward a forward position, a counterweight mounted for movement on the rod, a shock absorbing washer between the counterweight and the cap for smoothing an impact between the counterweight and the cap at an end of the firing cycle, and a counterweight spring that is weaker than the buffer spring, for biasing the counterweight toward the cap.
Claims20
A buffer assembly for moving in a receiver extension (110) of an automatic or semi-automatic firearm (100), against an action spring (120) in the receiver extension, from a forward battery position to a rearward recoil position, by action of a bolt carrier (112) movable at least partly into the receiver extension during the start of a firing cycle, the buffer assembly comprising:
- a rod (10) having a forward end and a rearward end;
- a central tube (12) mounted for movement between a forward position and a rearward position on the rod, the central tube having a cap (15) at its forward end against which the bolt carrier pushes during a firing cycle, the central tube being shorter than the rod so that the central tube may move along the rod between the forward and rearward positions of the central tube;
- a shock absorbing plug (25) attached to a rearward end of the rod for engaging an end wall of the receiver extension during an intermediate part of a firing cycle;
- a buffer tube (21) mounted for movement with the central tube and on the rod between a rearward position with a rearward end of the buffer tube near or against a forward face of the plug (25) during the intermediate part of the firing cycle, and a forward position spaced from the plug;
- a buffer spring (23) engaged between the plug (25) and the buffer tube (21) for biasing the buffer tube toward its forward position;
- a counterweight (16) mounted for movement on the central tube (12), between a rearward position toward the buffer tube (21) and a forward position toward the cap (15), for delaying the firing cycle;
- a shock absorbing washer (14) on the central tube (12) between the counterweight (16) and the cap (15) for smoothing an impact between the counterweight and the cap at an end of a firing cycle;
- and
- a counterweight spring (18) that is weaker than the buffer spring (23), for biasing the counterweight (16) toward the cap (15).
A buffer assembly comprising:
- a rod (10) having a forward end and a rearward end;
- a cap (15) having a forward end against which a bolt carrier pushes during a firing cycle, the cap being movable along the rod between forward and rearward positions;
- a shock absorbing plug (25) attached to a rearward end of the rod for engaging an end wall of a receiver extension during an intermediate part of the firing cycle;
- a buffer tube (21) mounted for movement on the rod between a rearward position toward the plug (25) during the intermediate part of the firing cycle, and a forward position spaced from the plug;
- a buffer spring (23) engaged between the plug (25) and the buffer tube (21) for biasing the buffer tube toward its forward position;
- a counterweight (16) mounted for movement on the rod, between a rearward position toward the buffer tube (21) and a forward position toward the cap (15), for delaying the firing cycle;
- a shock absorbing washer (14) between the counterweight (16) and the cap (15) for smoothing an impact between the counterweight and the cap at an end of the firing cycle;
- and
- a counterweight spring (18) that is weaker than the buffer spring (23), for biasing the counterweight (16) toward the cap (15).
Dependencies are inferred from the claim text.