Apparatus for reducing the manual cycling force of a firearm
OwnerBart Millerinventor
Life of this patent
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Abstract
Apparatuses, systems, and methods are provided for selectively changing the force required to cycle a firearm. In some embodiments, an apparatus is provided with at least two biasing members or springs where one biasing member generates a softer or smaller force than another biasing member. When manually cycling the firearm, the softer biasing member reduces the effort required for a person to cycle the firearm, which reduces the likelihood of injury and allows people with a broader range of physical abilities to cycle the firearm. Then, when the firearm fires a round, the other biasing member provides the greater force required to cycle the firearm in a conventional, semi-automatic or automatic manner.
Claims20
An apparatus for selectively changing a cycling force of a semi-automatic firearm, comprising:
- a primary biasing member having a first force constant and a rotational force;
- a secondary biasing member having a second force constant, wherein said primary and secondary biasing members are oriented along a longitudinal axis;
- a bushing assembly having a first bushing with a first cam surface and having a second bushing with a second cam surface, wherein said first and second cam surfaces operably engage as said first and second bushings move toward each other along said longitudinal axis to rotate said second bushing from a first position to a second position;
- wherein, when said primary biasing member is at a first displacement, a longitudinal force from said primary biasing member is greater than said rotational force, and said second bushing is in said second position;
- and
- wherein, when said primary biasing member is at a second displacement that is greater than said first displacement, said longitudinal force from said primary biasing member is less than said rotational force, and said rotational force resets said second bushing to said first position.
An apparatus for selectively changing a cycling force of a semi-automatic firearm, comprising:
- a guide tube adapted to be positioned in a slide of said semi-automatic firearm, wherein said guide tube extends from a first end to a second end;
- a bushing assembly disposed around said guide tube, said bushing assembly having a first bushing and a second bushing, said second bushing rotatable between a first position and a second position;
- a primary biasing member disposed around said guide tube and positioned between said bushing assembly and said second end of said guide tube, said primary biasing member having a first force constant and a rotational force;
- a secondary biasing member positioned in an interior volume of said guide tube, said secondary biasing member having a second force constant;
- a piston positioned in said interior volume of said guide tube;
- wherein, when said primary biasing member is at an initial displacement, a longitudinal force from said primary biasing member is less than said rotational force, and said rotational force sets said second bushing to said first position;
- and
- wherein, when said primary biasing member is at a compressed displacement after said semi-automatic firearm is discharged, said longitudinal force from said primary biasing member is greater than said rotational force, and said longitudinal force sets said second bushing to said second position where said bushing assembly can selectively engage said piston and said secondary biasing member to provide an additional longitudinal force.
An apparatus for selectively changing a cycling force of a semi-automatic firearm, comprising:
- a guide tube positioned in a slide of said semi-automatic firearm, wherein said guide tube extends from a first end to a second end, and said second end has a guide recess;
- a bushing assembly disposed around said guide tube proximate to said first end, said bushing assembly having a bushing recess;
- a primary biasing member disposed around said guide tube and positioned between said bushing assembly and said second end of said guide tube, wherein a first end of said primary biasing member extends in said bushing recess and a second end of said primary biasing member extends into said guide recess, and wherein said primary biasing member has an adjustable rotational force;
- a secondary biasing member positioned in an interior volume of said guide tube;
- wherein, when said primary biasing member is at an initial displacement, a longitudinal force from said primary biasing member is less than said rotational force, and said rotational force moves said bushing assembly to a first position;
- and
- wherein, when said primary biasing member is compressed after said semi-automatic firearm is discharged, said longitudinal force from said primary biasing member is greater than said rotational force, and said longitudinal force moves said bushing assembly to a second position where said bushing assembly selectively engages said secondary biasing member.
Dependencies are inferred from the claim text.