Patent ID: 6223566
Filing Date: 2001-05-01
Classification: F41A,Y10T

Abstract:
A gun lock for insertion in a barrel of a gun, said gun lock being of the type having a shaft assembly insertable into a muzzle end of a bore of the barrel, said bore having an inside diameter and said gun having a chamber inside diameter larger than said bore inside diameter and a shoulder between said chamber and said bore, said gun lock comprising:a lock assembly having a housing which surrounds a lock and said lock assembly including means to move an inner locking shaft in and out with respect to said housing when said lock is moved between a locked position and an unlocked position;a shaft assembly comprising:a hollow outer shaft fixed at a lock end to said housing of said lock assembly, said hollow outer shaft having a shaft outside diameter less than said bore inside diameter so that it fits easily into said bore, said hollow outer shaft having an inner passageway with a passageway inside diameter and said hollow outer shaft having a chamber end;an inner locking shaft held within said hollow outer shaft, said inner locking shaft having a lock end and a chamber end, said inner locking shaft extending and retracting as said lock moves between a locked position and an unlocked position;a locking ramp held by said hollow outer shaft and positioned inwardly from the chamber end of said hollow outer shaft, said locking ramp extending from a reduced diameter length adjacent said chamber end of said hollow outer shaft and an expanded diameter length positioned further from said chamber end of said hollow outer shaft than said reduced diameter length, said locking ramp having a camming surface; andan expandable locking cup having a base affixed to the chamber end of said locking shaft and slotted sides forming at least two locking fingers each having an outer end, said locking fingers being movable from an unlocked/extended position to a locked/retracted position as said lock moves between a unlocked position and a locked position and the outer end of said locking fingers moves from a position over said reduced diameter length in an unlocked position and as the inner locking shaft retracts, the outer end of each locking finger rides along said camming surface to a position over said expanded diameter length in a locked position and each outer end moves outwardly so that it faces said shoulder of said chamber so that the shaft assembly cannot be removed from the barrel of said gun.