Extractor and bolt for a firearm

Abstract

A bolt, having: an extractor pivotally thereto for movement between at least a first position and a second position, a hook member located at a distal end of the extractor, wherein the hook member is at least partially received within a pocket on a muzzle end of the bolt and the hook member moves away from a center line of the bolt as the hook member is moved from the first position towards the second position, wherein a bottom of the pocket is recessed within a first range A in a first direction from the muzzle and the hook member has an axial thickness parallel to the center line within a first range A′ and wherein the hook member is flush with the muzzle when the hook member is in the second position.

1 . A bolt for a firearm, comprising:
 an extractor pivotally mounted to the bolt for movement between at least a first position and a second position, the extractor having a hook member located at a distal end of the extractor, wherein the hook member is at least partially received within a pocket on a muzzle end of the bolt and the hook member moves away from a center line of the bolt as the hook member is moved from the first position towards the second position, wherein a bottom of the pocket is recessed at least a first dimension within a first range A that is greater than 0.130 inches and less than 0.200 inches in a first direction from the muzzle end of the bolt and the hook member has an axial thickness parallel to the center line of the bolt within a first range A′ that is greater than 0.050 inches and less than 0.130 inches and wherein the hook member is flush with the muzzle end of the bolt when the hook member is in the second position.   
     
     
         2 . The bolt as in  claim 1 , wherein the hook member of the extractor is spring biased towards the center line of the bolt by a spring located on the bolt. 
     
     
         3 . The bolt as in  claim 1 , wherein the hook member is located at a first end of the extractor and the spring is located to provide a biasing force to an opposite end of the extractor. 
     
     
         4 . The bolt as in  claim 3 , wherein the extractor is pivotally mounted to the bolt a location between the first end and the opposite end of the extractor. 
     
     
         5 . The bolt as in  claim 1 , wherein the bolt is configured for use in a semiautomatic or automatic firearm. 
     
     
         6 . The bolt as in  claim 1 , wherein the bolt is configured for use in a semiautomatic or automatic firearm rifle. 
     
     
         7 . The bolt as in  claim 5 , wherein the hook member of the extractor is spring biased toward the center line by a spring located on the bolt. 
     
     
         8 . The bolt as in  claim 7 , wherein the hook member is located at a first end of the extractor and the spring is located to provide a biasing force to an opposite end of the extractor. 
     
     
         9 . The bolt as in  claim 8 , wherein the extractor is pivotally mounted to the bolt a location between the first end and the opposite end of the extractor. 
     
     
         10 . The bolt as in  claim 1 , wherein the bolt is configured for use with a .308 caliber round. 
     
     
         11 . The bolt as in  claim 1 , wherein the first range A is greater than 0.135 inches and less than 0.175 inches and the first range A′ is greater than 0.055 inches and less than 0.105 inches. 
     
     
         12 . The bolt as in  claim 1 , wherein the first range A is greater than 0.140 inches and less than 0.150 inches and the first range A′ is greater than 0.060 inches and less than 0.080 inches. 
     
     
         13 . The bolt as in  claim 11 , wherein the hook member of the extractor is spring biased towards the center line of the bolt by a spring located on the bolt and wherein the hook member is located at a first end of the extractor and the spring is located to provide a biasing force to an opposite end of the extractor. 
     
     
         14 . The bolt as in  claim 13 , wherein the extractor is pivotally mounted to the bolt a location between the first end and the opposite end of the extractor. 
     
     
         15 . The bolt as in  claim 11 , wherein the bolt is configured for use in a semiautomatic or automatic firearm. 
     
     
         16 . The bolt as in  claim 12 , wherein the hook member of the extractor is spring biased towards the center line by a spring located on the bolt and wherein the hook member is located at a first end of the extractor and the spring is located to provide a biasing force to an opposite end of the extractor. 
     
     
         17 . The bolt as in  claim 16 , wherein the bolt is configured for use in a semiautomatic or automatic firearm. 
     
     
         18 . The bolt as in  claim 17 , wherein the bolt is configured for use with a .308 caliber round. 
     
     
         19 . A bolt for a firearm, comprising:
 an extractor pivotally mounted to the bolt for movement between a first position and a second position, the extractor having a hook member located at a distal end of the extractor, wherein the hook member is at least partially received within a pocket on a muzzle end of the bolt and the hook member moves away from a center line of the bolt as the hook member is moved from the first position towards the second position, wherein a bottom of the pocket is recessed at least a first dimension of 0.145 inches in a first direction from the muzzle end of the bolt and the hook member has an axial thickness of 0.075 inches in the first direction and parallel to the center line of the bolt and wherein the hook member is flush with the muzzle end of the bolt when it is in the second position.   
     
     
         20 . The bolt as in  claim 19 , wherein the hook member of the extractor is spring biased towards the center line of the bolt by a spring located on the bolt and wherein the hook member is located at a first end of the extractor and the spring is located to provide a biasing force to an opposite end of the extractor and wherein the extractor is pivotally mounted to the bolt a location between the first end and the opposite end of the extractor and wherein the bolt is configured for use in a semiautomatic or automatic firearm and wherein the bolt is configured for use with a .308 caliber round.