Apparatus and method for actuating a bolt carrier group of a receiver assembly
First Claim
1. A method of actuating a bolt carrier group of a firearm, comprising:
- pressurizing a bore of a piston tube in response to firing a round of ammunition, wherein pressurizing the bore of the piston tube includes routing a combustion gas into the bore of the piston tube and through an adjustable pressure regulator; and
moving a tappet assembly mounted on the piston tube from a static position toward a displaced position in response to pressurizing the bore of the piston tube, wherein the tappet assembly is engaged with a bolt carrier of the bolt carrier group and is coupled to an operating rod that is at least partially disposed within the piston tube.
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Accused Products
Abstract
An apparatus adapted for actuating a bolt carrier group apparatus comprising a piston tube attached to a receiver assembly. An operating rod is disposed in a bore of the piston tube. A piston is engaged with a first end of the operating rod. The operating rod moves from a static position to a displaced position when a combustion gas is exposed to a face of the piston. A bolt carrier including a bolt carrier lug is disposed in a bolt carrier lug channel of an upper receiver body. A tappet rod is engaged with the bolt carrier lug. The tappet rod moves substantially in unison with the operating rod. A yoke is attached to the tappet rod and to the operating rod. The yoke is mounted movably on the piston tube. An adjustable pressure regulator is coupled to the piston tube for regulating discharge of the combustion gas therethrough.
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Citations
12 Claims
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1. A method of actuating a bolt carrier group of a firearm, comprising:
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pressurizing a bore of a piston tube in response to firing a round of ammunition, wherein pressurizing the bore of the piston tube includes routing a combustion gas into the bore of the piston tube and through an adjustable pressure regulator; and
moving a tappet assembly mounted on the piston tube from a static position toward a displaced position in response to pressurizing the bore of the piston tube, wherein the tappet assembly is engaged with a bolt carrier of the bolt carrier group and is coupled to an operating rod that is at least partially disposed within the piston tube. - View Dependent Claims (2, 3, 4, 5)
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6. A method of actuating a bolt carrier group of a firearm, comprising:
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pressurizing a bore of a piston tube in response to firing a round of ammunition, wherein pressurizing the bore of the piston tube includes routing a combustion gas into the bore of the piston tube and through an adjustable pressure regulator; and
exposing a face of a piston mounted in the piston tube to the combustion gas whereby a force is generated for moving a tappet assembly mounted on the piston tube along a longitudinal axis of a piston tube from a static position toward a displaced position in response to pressurizing the bore of the piston tube, wherein the tappet assembly is engaged with a bolt carrier of the bolt carrier group.
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7. An apparatus adapted for actuating a bolt carrier group of a receiver assembly, comprising:
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a piston tube attached to a receiver assembly;
an operating rod disposed in a bore of the piston tube;
a piston engaged with a first end of the operating rod;
a tappet assembly movably mounted on the piston tube and engaged with a bolt carrier; and
an adjustable pressure regulator coupled to the piston tube. - View Dependent Claims (8, 9, 10, 11)
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12. An apparatus adapted for actuating a bolt carrier group of a receiver assembly, comprising:
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a piston tube attached to a receiver assembly;
an operating rod disposed in a bore of the piston tube;
a piston engaged with a first end of the operating rod, wherein the operating rod moves from a static position to a displaced position when a combustion gas is exposed to a face of the piston;
a bolt carrier including a bolt carrier lug disposed in a bolt carrier lug channel of an upper receiver body;
a tappet rod engaged with the bolt carrier lug, wherein the tappet rod moves substantially in unison with the operating rod;
a yoke attached to the tappet rod and to the operating rod, wherein the yoke is mounted movably on the piston tube; and
an adjustable pressure regulator coupled to the piston tube for regulating discharge of the combustion gas therethrough.
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Specification