IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0769317
(2010-04-28)
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등록번호 |
US-8276303
(2012-10-02)
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발명자
/ 주소 |
- Kapusta, John
- Ding, Tai-Lai
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
29 인용 특허 :
0 |
초록
▼
A hand guard rail system is fastened to a firearm having a barrel and a barrel nut, with the hand guard rail aligned to the top rail of the firearm. The hand guard rail system includes a hand guard and a sleeve fitted into the hand guard. The sleeve and the hand guard are fastened to the barrel nut,
A hand guard rail system is fastened to a firearm having a barrel and a barrel nut, with the hand guard rail aligned to the top rail of the firearm. The hand guard rail system includes a hand guard and a sleeve fitted into the hand guard. The sleeve and the hand guard are fastened to the barrel nut, thereby aligning the hand guard to the firearm.
대표청구항
▼
1. A firearm comprising: a. a receiver with a barrel opening formed at a forward end of said receiver;b. a barrel inserted into the barrel opening of said receiver;c. a first attachment surface adjoining and coaxial with the barrel opening of said receiver;d. a barrel nut with an outer surface, a se
1. A firearm comprising: a. a receiver with a barrel opening formed at a forward end of said receiver;b. a barrel inserted into the barrel opening of said receiver;c. a first attachment surface adjoining and coaxial with the barrel opening of said receiver;d. a barrel nut with an outer surface, a second attachment surface defining a central axis of said barrel nut, and a plurality of bores extending axially through said barrel nut at radial positions between the outer surface and the second attachment surface, the second attachment surface being engaged with said first attachment surface such that said barrel nut secures said barrel into the barrel opening of said receiver;e. a hand guard extending from a forward end to a rearward end between a peripheral surface and an inward surface, the inward surface being opened at the rearward and the forward ends to define a barrel space for receiving said barrel, said hand guard also including bores formed adjacent to the rearward opening of the barrel space;f. a sleeve with an inner surface adapted to engage the outer surface of said barrel nut, an outward surface adapted to engage a portion of the inward surface of said hand guard, and a first plurality of openings for receiving fasteners inserted through the bores of said barrel nut, said sleeve being interposed between said barrel nut and said hand guard; andg. a plurality of fasteners, each fastener inserted into one of the bores of said barrel nut and passing through one of the openings of said sleeve and extending into one of the bores of the hand guard, to fasten the barrel nut, sleeve, and hand guard to one another. 2. A hand guard rail assembly for use with a firearm, said assembly comprising: a. a hand guard with a peripheral surface and an inward surface extending between a rearward end and a forward end, the inward surface being opened at the rearward end and at the forward end to define a barrel space, and with bores formed adjacent to the rearward opening of the inward surface;b. a barrel nut with an outer surface, an attachment surface for attaching said barrel nut to a firearm having a mating attachment surface, the attachment surface defining a central axis of said barrel nut, and a plurality of bores for receiving fasteners extending axially through said barrel nut between the attachment surface and the outer surface;c. a sleeve formed with an inner surface adapted to engage the outer surface of said barrel nut, an outward surface adapted to engage a portion of the inward surface of said hand guard, and a plurality of openings for receiving fasteners extending through said sleeve between the inner surface and the outward surface; andd. a plurality of fasteners, each fastener inserted into one of the bores of said barrel nut and passing through one of the openings of said sleeve and extending into one of the bores of the hand guard, to fasten the barrel nut, sleeve, and hand guard to one another. 3. The firearm as claimed in claim 1, wherein the peripheral surface of said hand guard includes one or more protruding rails and the inward surface of said hand guard includes at least one outwardly recessed portion corresponding to one of the protruding rails formed on the peripheral surface. 4. The firearm as claimed in claim 3, wherein said hand guard includes cooling holes formed through at least one of the rails into the corresponding outwardly recessed portion of the barrel space. 5. The firearm as claimed in claim 3, wherein the rails have longitudinal grooves and radial cuts. 6. The assembly as claimed in claim 2, wherein said hand guard includes outwardly protruding top and bottom channels enclosing outward recesses of the barrel space, and further includes radially thickened portions extending between the top and bottom channels to define laterally opposing sidewalls, wherein rails are formed at the peripheral surface coextensive with the channels and the sidewalls. 7. The assembly as claimed in claim 6, wherein cooling holes are formed through at least one of the rails. 8. The assembly as claimed in claim 6, wherein the rails have longitudinal grooves and radial cuts. 9. The assembly as claimed in claim 6, wherein cooling holes are formed through at least one of the sidewalls. 10. The firearm as claimed in claim 1, wherein said first attachment surface is an external thread formed on said barrel. 11. The firearm as claimed in claim 1, wherein said first attachment surface is an internal thread formed in the barrel opening of said receiver. 12. The firearm as claimed in claim 1, wherein the plurality of openings formed in said sleeve extend through said sleeve substantially parallel to the outward surface of said sleeve. 13. The firearm as claimed in claim 1, wherein said plurality of fasteners include a first plurality of threaded fasteners inserted through selected smooth bores of said barrel nut, through corresponding openings of said sleeve, and into corresponding bores of said hand guard. 14. The firearm as claimed in claim 1, wherein said plurality of fasteners include a second plurality of fasteners inserted through selected openings of said sleeve and into corresponding bores of said hand guard. 15. The firearm as claimed in claim 1, wherein the plurality of openings formed in said sleeve include a first plurality of threaded openings, and said plurality of fasteners include a first plurality of threaded fasteners inserted through the bores of said barrel nut into the first plurality of threaded openings. 16. The firearm as claimed in claim 1, wherein said first attachment surface is an external thread formed on said receiver, the second attachment surface formed on said barrel nut is internally threaded, the plurality of openings formed in said sleeve include a first plurality of threaded openings and a second plurality of smooth openings, the bores of said hand guard are threaded, and said plurality of fasteners include first plurality of threaded fasteners inserted through selected bores of said barrel nut into the first plurality of threaded openings formed in said sleeve and a second plurality of threaded fasteners inserted through the second plurality of smooth openings formed in said sleeve into the threaded bores of said hand guard. 17. The assembly as claimed in claim 2, wherein said hand guard includes a protruding channel with a transverse hole extending through both side walls of the channel, said sleeve includes a forwardly protruding lug with a transverse opening, and said sleeve is fastened to said hand guard by a fastener inserted through the transverse hole of said hand guard and through the transverse opening of said sleeve.
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