[특허]Muzzle loading rifle with breech plug having gas seal facility

Thompson Center Arms Company, Inc.

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특허 상세정보

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Muzzle loading rifle with breech plug having gas seal facility

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F41C-009/08
미국특허분류(USC)	042/051; 089/001.3; 089/019; 089/026
출원번호	UP-0334002 (2006-01-17)
등록번호	US-7814694 (2010-11-08)
발명자 / 주소	Laney, Mark C. Garland, Gene L.
출원인 / 주소	Thompson Center Arms Company, Inc.
대리인 / 주소	McCormick, Paulding & Huber LLP
인용정보	피인용 횟수 : 7 인용 특허 : 16

초록
▼

A muzzle loading firearm has a barrel with a bore on a bore axis, and the barrel has a muzzle end and a breech end. A frame is connected to the barrel, and has a breech face. The frame moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug is removably attached to the barrel. The breech plug including a seal element closely received by the bore. The seal element may be a set of piston rings that are received in a ci...

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The invention claimed is: 1. A muzzle loading firearm, comprising: a barrel having a muzzle end and a longitudinal bore extending rearward from said muzzle end to a rear barrel portion with a breech plug chamber, said breech plug chamber having a rear end and an opposing forward end, an internally threaded engagement portion adjacent said rear end and a stepped initial portion forward from said internally threaded engagement portion; a breech plug having a one-piece, integral body with an outer peripheral surface and adapted to be received in said breech plug chamber, said breech plug body having a nose facing said longitudinal bore, a breech end opposite said nose, a nose portion adjacent said nose and a threaded engagement portion adjacent said breech end, said threaded engagement portion engaging said internally threaded engagement portion of said breech plug chamber, said nose portion having a circumferential groove formed in said outer peripheral surface thereof and spaced from said nose; and a deformable seal element positioned within said circumferential groove, said deformable seal element being compressed from a first position having a first outside diameter to a second position having a second outside diameter when said breech plug is secured in said breech plug chamber, said second outside diameter being less than said first outside diameter and substantially coextensive with a diameter of said stepped initial portion, to thereby form a gas seal to prevent fouling of said threaded engagement portion during firing. 2. The firearm of claim 1 wherein the seal element is a ring that encircles a portion of the breech plug. 3. The firearm of claim 2 wherein the groove is in part defined by a rear shoulder against which the ring rests in response to pressure within the bore forward of the breech plug. 4. The firearm of claim 2 wherein the ring loosely encompasses the breech plug, and is tightly received within the bore, such that the ring is not forced to rotate with the plug when the plug is rotated with respect to the bore. 5. The firearm of claim 2 wherein the ring has a split therein. 6. The firearm of claim 5 wherein the ring is sized to fit closely within the bore when the split is substantially closed. 7. The firearm of claim 2 wherein the ring has opposed flat faces and a cylindrical exterior surface contacting the bore. 8. The firearm of claim 2 wherein the seal element includes a plurality of split rings. 9. The firearm of claim 8 wherein the rings are oriented with their splits offset rotationally from each other. 10. A breech plug for a muzzle loading firearm having a barrel with a muzzle end and a longitudinal bore extending rearward from said muzzle end to a rear barrel portion with a breech plug chamber, said breech plug comprising: a breech plug having a one-piece, integral body with an outer peripheral surface and adapted to be received in said breech plug chamber, said breech plug body having a nose adapted to face said longitudinal bore, a breech end opposite said nose, a nose portion adjacent said nose and a threaded engagement portion adjacent said breech end, said threaded engagement portion engaging a complimentary threaded inner periphery of said breech plug chamber, said nose portion having a circumferential groove formed in said outer peripheral surface thereof and spaced from said nose; and a seal element positioned within said circumferential groove to thereby form a gas seal to prevent fouling of said threaded engagement portion during firing. 11. A muzzle loading firearm, comprising: a barrel having a muzzle end and a breech end, and a longitudinal bore having a bore axis and a diameter; a breech plug chamber affixed to said barrel breech end, said breech plug chamber having a rear end and an opposing forward end, an internally threaded engagement portion adjacent said rear end, and a stepped initial portion forward from said internally threaded engagement portion and adjacent said forward end; a breech plug having a one-piece, integral body adapted to be threadedly received in said breech plug chamber, said breech plug body having: a nose facing said longitudinal bore; a breech end opposite said nose; a forward portion adjacent said nose with an outside diameter dimensioned to be received by said stepped initial portion, said forward portion having a circumferential groove formed in said body and spaced from said nose; and a threaded engagement portion adjacent said breech end, said threaded engagement portion engaging said internally threaded engagement portion of said breech plug chamber; a deformable seal element having an outside diameter and positioned within said circumferential groove, said deformable seal element having a relaxed position where said outside diameter of said deformable seal element is greater than said outside diameter of said forward portion of said breech plug body, and a deformed position where said outside diameter of said deformable seal element is less than said outside diameter of said seal element when in said relaxed position. 12. The muzzle loading firearm of claim 11, wherein said seal element is a ring that encircles a portion of said breech plug. 13. The muzzle loading firearm of claim 12, wherein said seal element includes a plurality of split rings. 14. The muzzle loading firearm of claim 13, wherein when in said relaxed position said outside diameter of said deformable seal element is less than a minor diameter of said internally threaded portion to facilitate passage of said seal element through said internally threaded engagement portion into a sealed position within said stepped initial portion. 15. The muzzle loading firearm of claim 13, wherein said circumferential groove is wider than said seal element to allow shifting of said seal element in a direction parallel to said bore axis to facilitate the positioning of said seal element into a sealed portion within said transition stepped initial portion. 16. The muzzle loading firearm of claim 15, wherein said deformable seal element has an inside diameter that is substantially greater than a diameter of said circumferential groove such that said sealing element fits loosely within said circumferential groove to facilitate the positioning of said seal element into said sealed position.

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Muzzle loading rifle with breech plug having gas seal facility

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Muzzle loading rifle with breech plug having gas seal facility

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이 특허에 인용된 특허 (16)

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