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US 2011/0067284 A1Published application
Porting feature for firearm
OwnerMark L. Andryinventor
Life of this patent
Estimating the term…
Abstract
A choke for use with a shotgun is provided. In accordance with one embodiment the choke has a body that defines a bore with a longitudinal axis therethrough. The body is configured for engagement with a shotgun, and the bore is positioned for traversal of a wad and shot therethrough and out of an end of the bore. The body has a circumference, an inner surface, and outer surface. The body defines at least one port for venting gas from the bore that extends from the inner surface to the outer surface. The shape of the port at the inner surface is asymmetrical.
Claims20
A choke for use with a shotgun, comprising:
- a body defining a bore with a longitudinal axis therethrough, wherein the body has a longitudinal direction with respect to the longitudinal axis that extends in a distal direction and a proximal direction, wherein the distal direction of the longitudinal direction extends away from the user of the choke when using the shotgun, wherein the proximal direction of the longitudinal direction extends towards the user of the choke when using the shotgun, the body configured for engagement with a shotgun such that the bore is positioned for traversal of a wad and shot therethrough in the distal direction and out of an end of the bore, wherein the body has a circumference, wherein the body has an inner surface and an outer surface, wherein the body defines at least one port for venting gas from the bore that extends from the inner surface of the body to the outer surface of the body, wherein the shape of the port at the inner surface of the body is asymmetrical, wherein the port has a distal end that extends from the inner surface of the body to the outer surface of the body such that the distal end of the port at the outer surface of the body is located further in the distal direction from the user than the distal end of the port at the inner surface of the body such that the port extends in the distal direction from the distal end of the port at the inner surface of the body so as to form a knife-edge that scores the wad as it travels past the knife-edge in the distal direction.
A firearm, comprising:
- a barrel that defines a port for use in venting gas from the barrel during firing of the firearm, wherein the barrel has a longitudinal direction that extends in a distal direction and a proximal direction, wherein the distal direction of the longitudinal direction extends away from the user of the firearm when using the firearm, wherein the proximal direction of the longitudinal direction extends towards the user of the firearm when using the firearm, wherein the port extends from an inner surface of the barrel to an outer surface of the barrel, wherein the inner surface and the outer surface of the barrel are generally curved in shape, and wherein a distal end of the port at the inner surface of the barrel extends in a circumferential direction of the barrel but does not extend in the longitudinal direction of the barrel, wherein the distal end of the port extends from the inner surface of the barrel to the outer surface of the barrel such that the distal end of the port at the outer surface of the barrel is located further in the distal direction from the user than the distal end of the port at the inner surface of the barrel such that the port extends in the distal direction from the distal end of the port at the inner surface of the barrel so as to form a knife-edge that scores a projectile during firing of the firearm.
A method of forming a port for use in venting gas when discharging a firearm, comprising the steps of:
- providing a barrel that defines a bore that has a longitudinal axis, wherein the barrel has a curved outer surface and a curved inner surface, wherein the barrel has a longitudinal direction with respect to the longitudinal axis that extends in a distal direction and a proximal direction, wherein the distal direction of the longitudinal direction extends away from the user of the firearm when using the firearm, wherein the proximal direction of the longitudinal direction extends towards the user of the firearm when using the firearm;
- and
- cutting a port into the barrel such that the cutting proceeds in the proximal to distal direction of the barrel from the outer surface to the inner surface, wherein the port has a distal end that extends from the inner surface of the barrel to the outer surface of the barrel such that the distal end of the port at the outer surface of the barrel is located further in the distal direction from the user than the distal end of the port at the inner surface of the barrel such that the port extends in the distal direction from the distal end of the port at the inner surface of the barrel, wherein the distal end of the port at the inner surface of the barrel extends in a circumferential direction of the barrel but does not extend in either the distal or proximal directions so as to form a knife-edge that scores a projectile during discharging of the firearm.
Dependencies are inferred from the claim text.