Extractor arrangement for firearms

• US 4,265,043 A
• Filed: 08/30/1979
• Issued: 05/05/1981
• Est. Priority Date: 04/09/1979
• Status: Expired due to Term

• Current Assignee: Raci Acquisition Corporation
• Original Assignee: Kenneth C. Rowlands
• Inventors: Rowlands, Kenneth C.
• Primary Examiner(s): Jordan, Charles T.
• Application Number:
  US06/071,279
• Time in Patent Office: 614 Days
• Field of Search: 42/25, 42/16
• US Class Current: 42/25
• CPC Class Codes: F41A 15/14 the ejector being mounted on or within the bolt; Extractors per se

Abstract

A cartridge extractor, comprising a resilient ring segment formed with a claw, is mounted within a recessed bolt face without a rivet. The wall of the bolt recess is formed with an arcuate clearance cut, radius cuts at either end of the clearance cut, and projecting lobes at the junctions of these cuts. The extractor ring has its free ends bent to form detent arms, which are seated in the radius cuts to support the claw in a position to engage a cartridge base as it enters the recess. This deflects the ring into the clearance cut, guided by the detent arms sliding over the lobes. When the claw seats in the extraction groove of the cartridge, the ring is guided back to its original position by the detent arms re-seating themselves in the radius cuts.

For use in auto-loading firearms whose bolts rotate violently, a means is added to prevent relative rotation of the extractor ring, without interfering with its normal deflection. This may be a pin or a protrusion extending into the clearance cut, or a tail on the extractor engaged in a hole in the bolt.

Claims

1. In a firearm of the type which includes a breech-bolt having a face formed with an annular shroud having an interior circumferential wall defining a recess for receiving the base of a cartridge, and a resilient extractor ring segment received in said recess and formed with a claw in a central portion thereof for engaging the cartridge base, an improved extractor arrangement comprising:

said extractor ring segment having free end portions at opposite ends of the arc length thereof bent outwardly to form detent arms;

said interior wall being formed with an arcuate clearance cut, and having a pair of projections circumferentially spaced thereabout, said clearance cut extending said recess outwardly into said shroud and defining a lip lying between said clearance cut and said bolt face;

said detent arms normally engaging said projections to position said central portion of said ring segment in circumferential alignment with said clearance cut and in spaced-apart relation to said interior wall, said ring segment being displaceable to admit a cartridge base into said recess by deflecting radially outwardly toward said interior wall with an accompanying sliding motion of said detent arms with respect to said projections.

2. The extractor arrangement of claim 1, in which said interior wall is formed with a pair of radius cuts located at opposite ends of the arc length of said clearance cut, said radius cuts and said clearance cut intersecting to form said projections in said interior wall.

3. The extractor arrangement of claim 2, said detent arms being formed to conformably engage the portions of said interior wall lying in said radius cuts.

4. The extractor arrangement of claim 1, said projections being circumferentially located to normally engage said detent arms at the junctions between said detent arms and said central portion of said ring segment.

5. The extractor arrangement of claim 1, said recess having a substantially circular opening onto said bolt face defined by said shroud and said lip therein, said clearance cut being eccentric to said circular opening, said central portion of said extractor ring segment being constructed and arranged to lie within said clearance cut with said claw protruding into said circular opening.

6. The extractor arrangement of claim 5, in which said interior wall is formed with a pair of radius cuts located at opposite ends of the arc length of said clearance cut, said radius cuts and said clearance cut intersecting to form said projections in said interior wall, said radius cuts being eccentric to said circular opening and being separated from said bolt face by said lip.

7. The extractor arrangement of claim 1, together with anti-rotation means constructed and arranged to prevent substantial rotation of said ring segment relative to said breech-bolt in at least one angular direction, but to allow freedom of deflection of said ring segment in a radial direction.

8. The extractor arrangement of claim 7, in which said anti-rotation means is secured to said bolt and protrudes into said recess to interfere with relative rotation of said extractor ring segment.

9. The extractor arrangement of claim 8, in which said anti-rotation means comprises a pin, and said shroud is formed with an opening extending into said recess for receiving said pin.

10. The extractor arrangement of claim 8, in which said anti-rotation means comprises a projection integrally formed in said interior wall and extending into said recess.

11. The extractor arrangement of claim 8, in which said central portion of said extractor ring segment is formed with at least one relief cut circumferentially spaced from said claw and positioned to receive said anti-rotation means therein.

12. The extractor arrangement of claim 7, in which said anti-rotation means is secured to said extractor ring segment, and the interior of said recess is formed to interengage with said anti-rotation means to interfere with rotation of said extractor ring segment.

13. The extractor arrangement of claim 12, in which said anti-rotation means comprises a tail projecting from said extractor ring segment.

14. The extractor arrangement of claim 13, in which said shroud is formed with an opening extending into said recess for receiving said projecting tail.

15. In a firearm of the type which includes a breech-bolt having a face formed with an annular shroud having an interior circumferential wall defining a recess for receiving the base of a cartridge, and a resilient extractor ring segment received in said recess and formed with a claw in a central portion thereof for engaging the cartridge base, an improved extractor arrangement comprising;

said extractor ring segment having free end portions at opposite ends of the arc length thereof bent outwardly to form detent arms;

said interior wall being formed with an arcuate clearance cut, and with a pair of radius cuts located at opposite ends of the arc length of said clearance cut, said clearance cut and radius cuts extending said recess outwardly into said shroud and defining a lip lying between said cuts and said bolt face;

said detent arms normally being seated in said radius cuts to locate said claw and central portion of said ring segment in circumferential alignment with said clearance cut and in spaced-apart relation to said interior wall, said ring segment being displaceable to admit a cartridge base into said recess by deflecting radially outwardly toward said interior wall with an accompanying sliding motion of said detent arms with respect to said radius cuts.

16. In a firearm, the combination comprising:

a bolt having a face formed with an annular shroud having an interior circumferential wall defining a recess for receiving the base of a cartridge, said interior wall including a clearance cut separated from said bolt face by an intervening lip;

a resilient extractor ring segment received in said recess and extending into said clearance cut behind said lip;

said ring segment having a central portion formed with an extractor claw, and having opposite free ends thereof formed with detent arms projecting outwardly therefrom, said detent arms bearing against said interior wall and normally supporting said central portion out of contact therewith;

said interior wall having a pair of lobes circumferentially spaced thereabout and projecting therefrom to engage and locate said detent arms;

said central portion being resiliently deflectable outwardly toward said peripheral wall by a cartridge base entering said recess, said detent portions being slidable over said lobes to accommodate the deflection of said central portion.

17. In a firearm, the combination comprising:

a bolt having a face formed with an annular shroud having an interior circumferential wall defining a recess for receiving the base of a cartridge;

said circumferential wall being formed with an arcuate clearance cut and with a pair of radius cuts located at opposite ends of the arc length of said clearance cut, said clearance cut and radius cuts extending said recess outwardly into said shroud;

a resilient extractor ring segment having a central portion formed with an extractor claw, and having opposite free end portions thereof formed with detent arms;

said extractor ring segment being received in said extended recess, and being constructed and arranged such that, in a normal undeflected condition thereof, said detent arms are received each in one of said radius cuts to support said central portion in spaced-apart relation to said interior wall and with said extractor claw positioned to engage a cartridge base entering said recess, and seating of the cartridge base in said recess is accommodated by a deflection of said central portion outwardly into said clearance cut to pass the cartridge base, and by a sliding motion of said detent arms with respect to said radius cuts.