Patent ID: 7975417
Filing Date: 2011-07-12
Classification: F41A

Abstract:
1. An improved system for joining a barrel to the receiver of a bolt action rifle comprising a substantially hollow receiver having a stock end opposite an open barrel end and a longitudinal axis extending therebetween; a barrel having an externally threaded chamber end and a muzzle end and a longitudinal axis extending therebetween, said chamber end containing a chamber configured to receive a rifle cartridge; an insert having a barrel end and a receiver end and a substantially cylindrical passageway extending therebetween; said substantially cylindrical passageway having a longitudinal axis extending from said barrel end to said receiver end, said substantially cylindrical passageway further comprising a plurality of internal threads in threaded engagement with said external threads on said chamber end of said barrel and wherein said receiver end of said insert is releasably disposed in said barrel end of said receiver, and wherein said insert is configured to align said longitudinal axis of said barrel with said longitudinal axis of said receiver and with said longitudinal axis of said passageway through said insert, whereby said barrel, said passageway and said receiver are rendered substantially coaxial, and wherein said insert further comprises a plurality of annular locking lugs extending into said passageway proximate to said receiver end of said insert, said insert lugs defining a plurality of lug spaces positioned between said lugs; and a bolt having a handle end and a bolt head opposite said handle end, said bolt slidably and rotatably disposed within said receiver and oriented with said bolt head facing said barrel end of said receiver, said bolt head further comprising a bolt face positioned substantially transverse to said common longitudinal axis of said receiver, said passageway and said barrel; said bolt head having a plurality of annular locking lugs extending outward from said bolt head, wherein said bolt locking lugs substantially match both said insert locking lugs and said insert lug spaces; said bolt having an open position wherein said bolt is oriented so that said bolt locking lugs are aligned with said insert lug spaces, whereby said bolt face and said bolt locking lugs may be advanced into said substantially cylindrical passageway of said insert by sliding said bolt toward said barrel end of said receiver; said bolt having a closed position wherein said locking lugs of said bolt are between said locking lugs of said insert and said barrel end of said insert, and wherein said locking lugs of said bolt and said locking lugs of said insert are substantially aligned and in substantial contact, whereby said locking lugs of said insert will prevent substantially any motion by said bolt toward said stock end of said receiver, and wherein said bolt may be moved into said fully closed position from said open position by completely advancing said bolt toward said barrel end of said receiver and then rotating said bolt; wherein said insert locking lugs are configured to engage said bolt locking lugs as said bolt is rotated into said closed position and wherein said insert locking lugs and said insert are sized and positioned to move said bolt face to within a predetermined distance from said chamber as said insert locking lugs engage said bolt locking lugs during rotation of said bolt into said closed position; and a first recoil lug depending from said receiver and a second recoil lug depending from said insert, wherein said first recoil lug is positioned substantially perpendicular to said longitudinal axis of said receiver and said second recoil lug is positioned substantially perpendicular to said longitudinal axis of said substantially cylindrical passageway of said insert; whereby securing said first recoil lug in a position substantially parallel to said second recoil lug will substantially align said longitudinal axis of said receiver with said longitudinal axis of said substantially cylindrical passageway.