Bolt assembly for a firearm
OwnerKarl R. Lewisinventor
Life of this patent
Estimating the term…
Abstract
An improved bolt carrier for a firearm is provided that improves the overall reliability and performance of the firearm bolt assembly. The bolt carrier includes a bolt with a body having a number of lugs extending therefrom. The lugs are integrally connected to the body and define a fillet extending between a sidewall of the lug and the outer surface of the body of the bolt. The bolt also includes an extractor pivotably engaged in a recess formed in the bolt. The extractor has a pair of flanges configured to engage a pair of springs disposed on either side of a firing pin bore extending through the bolt.
Claims35
A bolt for a firearm, the bolt comprising:
- an elongate body having a proximal end and an opposite distal end along a longitudinal axis, said body defining a generally cylindrical portion and a firing pin bore along said longitudinal axis between said proximal and distal ends, said body further including a number of bolt lugs adjacent said distal end integrally connected to and radially extending from said body about said longitudinal axis, said bolt lugs including at least a first bolt lug and an adjacent second bolt lug;
- a recess formed in said body extending between said first and second bolt lugs;
- said body further defining a pair of spring wells oppositely disposed about said firing pin bore in communication with said recess;
- a spring disposed within each of said spring wells;
- and
- an extractor residing within said recess pivotably coupled to said body, said extractor including:
- a first portion extending between said first and second bolt lugs;
- a second portion having a pair of flanges extending therefrom, each of said flanges engaging a corresponding one of said springs to bias said extractor to a first position;
- and
- a body extending between said first portion and said second portion.
An extractor for a bolt of a firearm, the bolt including an elongate body having a proximal end and an opposite distal end along a longitudinal axis, the body defining a generally cylindrical portion and a firing pin bore along the longitudinal axis between the proximal and distal ends, the body further including a number of bolt lugs adjacent the distal end integrally connected to and radially extending from the body about the longitudinal axis, the bolt lugs including at least a first bolt lug and an adjacent second bolt lug, the body further including a recess formed therein extending between the first and second bolt lugs, the body additionally defining a pair of spring wells oppositely disposed about the firing pin bore in communication with the recess and spring disposed within each of the spring wells, the extractor comprising:
- a first portion extending between the first and second bolt lugs;
- a second portion having a pair of flanges extending therefrom;
- a body extending between said first portion and said second portion, said body having a pin receiving portion defining a pin bore therethrough;
- and
- a pin disposed through said pin bore for pivotably coupling the extractor to the body, wherein each of said flanges engages a corresponding one of the springs to bias the extractor to a first position for releasably engaging a cartridge.
The bolt carrier of claim 18, wherein the bolt includes a pair of spring wells, each of the spring wells defining a first axis therethrough, the bolt defining a second axis extending therethrough perpendicular to the firing pin bore and intersecting each of the first axes at a point, each of the first axes forming an acute angle a with the second axis at said point towards said firing pin bore.
A bolt carrier for a firearm, the bolt carrier, comprising:
- a bolt having a cylindrical body defining a firing pin bore therethrough;
- an extractor pivotably coupled to said bolt, said extractor defining a pair of flanges extending therefrom;
- and
- a pair of springs oppositely disposed about said firing pin bore within said bolt, wherein each of said flanges engages a corresponding one of said springs.
A bolt carrier for a firearm, the bolt carrier comprising:
- a bolt having a cylindrical body defining firing pin bore therethrough;
- and
- at least one spring well defined by said bolt adjacent said firing pin bore, said spring well extending within said bolt in a direction generally transverse to said firing pin bore to a spring bearing surface positioned proximate said firing pin bore.
A bolt for a firearm, the bolt comprising:
- an elongate body having a proximal end and an opposite distal end along a longitudinal axis, said body defining an intermediate portion between said proximal and distal ends, said intermediate portion having an outer surface thereabout;
- and
- a number of bolt lugs adjacent said distal end extending from said outer surface and extending radially from said body about said longitudinal axis, each of said number of bolt lugs having an end face and an opposing bearing face along said longitudinal axis with said end face proximate said distal end, each of said bolt lugs further having a pair of sidewalls extending between said end face and said bearing face, wherein at least one of said bolt lugs includes a pair of fillets formed by the intersection of each of said sidewalls with said outer surface and each of said fillet defines a diagonal extending between said sidewall and said outer surface.
A bolt for a firearm, the bolt comprising:
- an elongate body having a proximal end and an opposite distal end along a longitudinal axis, said body defining an intermediate portion between said proximal and distal ends, said intermediate portion having an outer surface thereabout;
- and
- a number of bolt lugs adjacent said distal end extending from said outer surface and extending radially from said body about said longitudinal axis, each of said number of bolt lugs having an end face and an opposing bearing face along said longitudinal axis with said end face proximate said distal end, each of said bolt lugs further having a pair of sidewalls extending between said end face and said bearing face, wherein at least one of said bolt lugs includes a pair of fillets formed by the intersection of each of said sidewalls with said outer surface, further wherein said fillet defines an arc having a radius R of about 0.026 inches to about 0.036 inches extending between said sidewall and said outer surface.
Dependencies are inferred from the claim text.