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US 7,610,844 B2Granted
Firearm having an indirect gas operating system
AssigneeColt Defense LLC
InventorsGrzegorz Kuczynko, Josh Dorsey
Life of this patent
Estimating the term…
Abstract
An M4 type automatic or semi-automatic firearm having an indirect gas operating system. A bolt assembly has a striking surface. The bolt assembly is enclosed within an M4 type receiver assembly. A barrel assembly having a bore is coupled to the receiver assembly. A gas block having a cylinder is fitted to the barrel assembly with the cylinder in communication with the bore. A piston and rod assembly has a piston and a striking rod, with the piston fitted to the cylinder. Gas discharged from a fired cartridge displaces the piston and causes the striking rod to strike the striking surface displacing the bolt assembly.
Claims19
A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system comprising:
- a bolt assembly having a striking surface, the bolt assembly enclosed within and operates within a black rifle configuration receiver assembly;
- a barrel assembly having a bore, the barrel assembly coupled to the receiver assembly;
- a gas block having a cylinder, the gas block fitted to the barrel assembly, the cylinder in communication with the bore;
- and
- a piston and rod assembly having a piston and a striking rod, the piston fitted to the cylinder;
- wherein, gas discharged from a fired cartridge displaces the piston and causes the striking rod to strike the striking surface displacing the bolt assembly, and wherein the striking rod and the striking surface disengage each other after the striking rod strikes the striking surface.
3 more elements
An automatic or semi-automatic firearm having an indirect gas operating system comprising:
- a bolt assembly enclosed within a receiver;
- a barrel assembly having a bore and coupled to the receiver;
- a cylinder fitted to barrel assembly, the cylinder in communication with the bore via an intermediate regulator, the intermediate regulator having two selectable positions corresponding to two predetermined different selectable firing rates;
- and
- a piston assembly having a piston end and a striking end, the piston end fitted to the cylinder;
- wherein, gas discharged from a fired cartridge displaces the piston and causes the striking end to displace the bolt assembly, and wherein the intermediate regulator regulates the flow of the gas from the bore to the piston, wherein the cylinder further comprises an exhaust port, wherein piston stroke is required for the gas in the cylinder to be in communication with the exhaust port, wherein the gas is exhausted after the piston assembly reaches an end stroke position.
3 more elements
An automatic or semi-automatic firearm having an indirect gas operating system comprising:
- a bolt assembly enclosed within a receiver;
- a barrel assembly having a bore and coupled to the receiver;
- a cylinder fitted to barrel assembly, the cylinder in communication with the bore via an intermediate regulator;
- and
- a piston assembly having a piston end and a striking end, the piston end fitted to the cylinder;
- wherein, gas discharged from a fired cartridge displaces the piston and causes the striking end to displace the bolt assembly, wherein the intermediate regulator regulates the flow of the gas from the bore to the piston, wherein the cylinder is housed within a block, wherein the block is mounted to the barrel, and wherein the intermediate regulator is rotationally housed within the block, wherein the intermediate regulator has an orifice, and wherein the block has a first port in communication with the barrel and the orifice, and wherein the block has a second port in communication with the orifice and the cylinder.
3 more elements
An automatic or semi-automatic firearm having an indirect gas operating system comprising:
- a bolt assembly enclosed within a receiver;
- a barrel assembly having a bore and coupled to the receiver;
- a cylinder fitted to the barrel assembly, the cylinder in communication with the bore via an intermediate regulator;
- a piston assembly having a piston end and a striking end, the piston end fitted to the cylinder;
- and
- the intermediate regulator having two selectable positions corresponding to two predetermined selectable firing rates;
- wherein, gas discharged from a fired cartridge displaces the piston and causes the striking end to displace the bolt assembly, and wherein the intermediate regulator regulates the flow of the gas from the bore to the piston, and wherein the intermediate regulator may be switched between the two selectable positions by an operator without the use of tools, and wherein the cylinder further comprises an exhaust port, and wherein piston stroke is required for the gas in the cylinder to be in communication with the exhaust port, and wherein the gas is exhausted after the piston assembly reaches an end stroke position.
4 more elements
An automatic or semi-automatic firearm having an indirect gas operating system comprising:
- a bolt assembly enclosed within a receiver;
- a barrel assembly having a bore and coupled to the receiver;
- a cylinder fitted to the barrel assembly, the cylinder in communication with the bore via an intermediate regulator;
- a piston assembly having a piston end and a striking end, the piston end fitted to the cylinder;
- and
- the intermediate regulator having two selectable positions corresponding to two selectable firing rates;
- wherein, gas discharged from a fired cartridge displaces the piston and causes the striking end to displace the bolt assembly, and wherein the intermediate regulator regulates the flow of the gas from the bore to the piston, and wherein the intermediate regulator may be switched between the two selectable positions by an operator without the use of tools, wherein the cylinder is housed within a block, and wherein the block is mounted to the barrel, and wherein the intermediate regulator is rotationally housed within the block, and wherein the intermediate regulator has an orifice, and wherein the block has a first port in communication with the barrel and the orifice, and wherein the block has a second port in communication with the orifice and the cylinder, and wherein the bolt assembly has a removable striking surface, and wherein the piston assembly comprises a separable piston and striking rod, and wherein the piston is spring loaded into the cylinder via a spring force exerted by the striking rod.
4 more elements
Dependencies are inferred from the claim text.