Rifle
OwnerRobert B. Daviesinventor
Life of this patent
Estimating the term…
Abstract
A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the piston moves between retracted and extended positions the bolt carrier is moved between closed and open positions. The bolt carrier includes a weight movable within a guide frame between rearward and forward limits. The buffer system includes a compression spring in a tube attached to the upper receiver in abutting engagement with the bolt carrier. A partially fluid filled cylinder is attached to a coil of the spring and includes a piston and shaft. The piston is formed so that fluid in the cylinder restricts movement in one direction and allows free movement in a second direction.
Claims12
A rifle having an upper receiver carrying a bolt carrier and having a cooling system comprising:
- a barrel attached to the upper receiver by a barrel nut;
- portion of an operating system extending at least partially along the barrel and coupled to the bolt carrier;
- an elongated tubular member bonded to the barrel for conveying heat from the barrel to the tubular member;
- and
- a plurality of heat exchanging fins extending from an outer surface of the tubular member.
A rifle having a receiver and a cooling system comprising:
- a barrel attached to the upper receiver by a barrel nut;
- an elongated tubular member bonded to the barrel for conveying heat from the barrel to the tubular member;
- and
- a plurality of heat exchanging fins extending from the tubular member.
Dependencies are inferred from the claim text.