Bolt for firearm

Patent metadata

Field	Value
Publication number	US-10012458-B2
Application number	US-201715482839-A
Country	US
Kind code	B2
Filing date	Apr 10, 2017
Priority date	May 12, 2016
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A pistol has a bolt with a surface that contacts the cartridge in the magazine to next be chambered. The bolt is mounted within the slide. As the bolt moves with the slide out of battery the surface exerts a force on the cartridge in the direction of motion of the slide. The force counteracts inertial forces on the cartridge imposed by recoil of the pistol.

First claim

What is claimed is:

1. A slide for a pistol having a frame, said pistol being fed cartridges from a magazine received within said frame, said slide comprising:
first and second sidewalls in spaced relation adjacent to one another and connected by a top wall, said sidewalls and top wall surrounding a central space, said sidewalls being engageable with said frame for reciprocating motion of said slide thereon between a first position in battery and a second position out of battery;
a bolt mounted within said central space, said bolt having a surface positionable in facing relation with one of said cartridges in said magazine when said sidewalls engage said frame, said surface comprising a plurality of steps arranged one behind another along a direction of motion of said slide, each one of said steps comprising a shoulder projecting from said surface toward said one cartridge, said shoulders facing said direction of motion of said slide toward said out of battery position, said steps contacting and exerting a force on said one cartridge in said direction of motion of said slide upon motion of said slide toward said out of battery position.

2. The slide according to claim 1 , wherein friction between said surface and said cartridge exerts said force on said cartridge.

3. The slide according to claim 1 , further comprising a rib mounted on said bolt and extending lengthwise parallel to said direction of motion of said slide, said surface being positioned on said rib.

4. The slide according to claim 3 , wherein said bolt further comprises a breech face, said rib having an end positioned adjacent to said breech face.

5. A pistol fed cartridges from a magazine, said pistol comprising:
a frame defining a magazine well, said magazine being receivable within said magazine well;
a slide engaged with said frame for reciprocating motion thereon between a first position in battery and a second position out of battery;
a bolt mounted within said slide, said bolt having a surface in facing relation with one of said cartridges in said magazine when said magazine is received within said magazine well, said surface comprising a plurality of steps arranged one behind another along a direction of motion of said slide, each one of said steps comprising a shoulder projecting from said surface toward said one cartridge, said shoulders facing said direction of motion of said slide toward said out of battery position, said steps contacting and exerting a force on said one cartridge in said direction of motion of said slide upon motion of said slide toward said out of battery position.

6. The pistol according to claim 5 , wherein said slide comprises:
first and second sidewalls in spaced relation adjacent to one another and connected by a top wall, said sidewalls and top wall surrounding a central space, said sidewalls being engaged with said frame for said reciprocating motion, said bolt being mounted within said central space.

7. The pistol according to claim 5 , wherein friction between said surface and said cartridge exerts said force on said cartridge.

8. The pistol according to claim 5 , further comprising a rib mounted on said bolt and extending lengthwise parallel to said direction of motion of said slide, said surface being positioned on said rib.

9. The pistol according to claim 8 , wherein said bolt further comprises a breech face, said rib having an end positioned adjacent to said breech face.

Assignees

• Smith & Wesson Corp

Inventors

• O'Clair Sean
• Zukowski Gary

Classifications

• F41A9/65

  Box magazines having a cartridge follower · CPC title

• F41C3/00

  Pistols, e.g. revolvers (specially adapted for underwater use F41C9/06; for slaughtering or stunning animals A22B; for shooting bolts into concrete constructions, metal walls or the like B25C) · CPC title

• F41A3/66 Primary

  Breech housings or frames; Receivers · CPC title

• F41A9/41

  pushing unbelted ammunition from a box magazine on the gun frame into the cartridge chamber · CPC title