Patent ID: 6668608
Filing Date: 2003-12-30
Classification: A44B,Y10T

Abstract:
A key ring holder device, which comprises:(a) a metal bullet member; said bullet member including an axially extending bore with an opening at one end, a first hole cut transversely in a distal end of said bullet member, and a second opening cut in a side of said bullet member, through to said bore; (b) a ball bearing that fits and is held in said second opening in said bullet member; (c) a metal shell casing having the equivalent shape of a rifle cartridge casing or bullet shell casing; said shell casing comprising: a hollow cylindrical body portion; a disc shaped head member that is attached to one end of said body, closing off said body, said head member including an axially bored third opening; a narrow, cylindrical neck portion having a mouth opening which is sized to slidingly accept said bullet member; and, a transition shoulder portion which is attached axially to a distal end of said body portion and to said neck portion; and (d) a spring-loaded longitudinally driven piston, comprising: a rigid metal, circular rod piston member; and a helical compression spring which is fitted surrounding said piston member; said piston member including a circular flange that is mounted concentrically near one end, a wide, rigid tab member that is fastened to a distal end of said piston member, and a pin member which is attached coaxially to said flange, said pin member having a tapered free end; said piston being disposed axially inside said body portion of said shell casing and having an end including said tab member, projecting axially through said third opening in said shell casing; said spring normally exerting pressure on said flange, causing said pin member to enter said bore in said bullet member and impinge on said ball bearing which is mounted in a wall of said bore; said ball bearing in response, being moved to impinge on an inner surface of said shoulder portion of said shell casing, preventing said bullet member from being withdrawn from said shell casing.