Debris shield for a firearm

• US 8,800,192 B2
• Filed: 03/12/2013
• Issued: 08/12/2014
• Est. Priority Date: 07/01/2008
• Status: Active Grant

• Current Assignee: Adcor Industries, Inc.
• Original Assignee: Adcor Industries, Inc.
• Inventors: Brown, Michael J.
• Primary Examiner(s): KLEIN, GABRIEL J
• Application Number:
  US13/796,964
• Publication Number:
  US 20140026457A1
• Time in Patent Office: 518 Days
• Field of Search: 42/16, 42/96, 421/06
• US Class Current: 42/96
• CPC Class Codes: F41A 3/12 Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
• CPC Class Codes: F41A 3/66 Breech housings or frames; Receivers
• CPC Class Codes: F41A 35/00 Accessories or details not otherwise provided for
• CPC Class Codes: F41A 5/18 gas-operated
• CPC Class Codes: F41A 5/26 Arrangements or systems for bleeding the gas from the barrel F41A5/20 - F41A5/24 take precedence
• CPC Class Codes: F41A 5/28 Adjustable systems
• CPC Class Codes: F41C 23/16 Forestocks; Handgrips; Hand guards pump-action guns F41C7/02
• CPC Class Codes: F41G 1/02 Foresights

Abstract

The present invention provides for a firearm having a receiver defining a bore with the receiver extending along a longitudinal axis. The receiver defines an ejection port transverse to the longitudinal axis with the bore defining an inner surface. The firearm further includes a bolt carrier disposed in the bore and moveable relative to the receiver along the longitudinal axis between a firing position and a rearward position. The firearm also includes a shield longitudinally affixed to the bolt carrier and movable with the bolt carrier as a unit between the firing and rearward positions along the longitudinal axis with the shield blocking the ejection port when in the firing position and the shield sliding along the inner surface away from the ejection port when moving to the rearward position in conjunction with the bolt carrier.

Claims

1. A breech block mechanism for a firearm, said mechanism comprising:

a bolt carrier defining a hole extending along a bolt axis and moveable between an initial position and a mid position;

a bolt disposed in said hole and movable along said bolt axis between a first position and a second position during movement of said bolt carrier between said initial and mid positions; and

a shield longitudinally affixed to said bolt carrier and moving with said bolt carrier as a unit along said bolt axis during movement between said initial and mid positions while said bolt moves between said first and second positions such that said shield is immovable relative to said bolt carrier along said bolt axis during said movement of said bolt carrier between said initial and mid positions, wherein said shield is configured to block an ejection port in a receiver of the firearm when said bolt carrier is in the initial position.

2. A mechanism as set forth in claim 1 wherein said bolt carrier defines a bolt carrier recess having an outer surface for receiving said shield.

3. A mechanism as set forth in claim 2 further including a securing system attached to one of said bolt carrier and said shield for longitudinally affixing said shield to said bolt carrier.

4. A mechanism as set forth in claim 3 wherein securing system includes a first peg and a second peg spaced from each other with said first and second pegs extending outwardly from said outer surface for longitudinally affixing said shield to said bolt carrier.

5. A mechanism as set forth in claim 4 wherein each of said first and second pegs include a lip for engaging said shield to longitudinally affix said shield to said bolt carrier.

6. A mechanism as set forth in claim 5 wherein said shield includes a middle portion, a first end portion and a second end portion with said first and second end portions extending outwardly from said middle portion away from each other and wherein said first end portion defines a third recess and said second end portion defines a fourth recess with said lip of said first peg frictionally engaging said third recess and said lip of said second peg frictionally engaging said fourth recess for longitudinally affixing said shield to said bolt carrier while allowing tilting movement of said shield.

7. A mechanism as set forth in claim 3 wherein said securing system includes a boss extending outwardly from said outer surface between said first and second pegs.

8. A mechanism as set forth in claim 7 wherein said middle portion defines a fifth recess for receiving said boss to longitudinally affix said shield to said bolt carrier.

9. A mechanism as set forth in claim 1 further including a biasing device disposed between said bolt carrier and said shield for biasing said shield outwardly away from said bolt carrier.

10. A mechanism as set forth in claim 9 wherein said biasing device is further defined as a first spring and a second spring spaced from each other and disposed between said bolt carrier and said shield for biasing said shield outwardly away from said bolt carrier.

11. A mechanism as set forth in claim 10 wherein said shield has a body having a first end portion defining a first recess and a second end portion defining a second recess, wherein said first spring is mounted in said first recess and said second spring is mounted in said second recess for biasing said body away from said bolt carrier.

12. A mechanism as set forth in claim 10 wherein said body is formed of a self lubricating polymeric material.