Resettable axial tumbler lock

An axial tumbler pin lock that includes an inner cylindrical body and a pair of abutting, coaxially positioned first and second inner sleeves that are rotatably carried on the cylindrical body and are capable of relative rotation with respect to each other and with respect to the cylindrical inner body. The cylindrical inner body includes a stepped portion that abuts an inner sleeve to define a transversely extending locking plane. The respective abutting faces of the second inner sleeve and the inner cylindrical body define a transversely extending first reset plane, and the abutting faces of the first rotatable sleeve and the second rotatable sleeve define a transversely extending second reset plane. The lock is adapted to receive a first reset key to permit relative rotation between the innermost or second sleeve relative to the cylindrical inner body to permit realignment of axially extending tumbler pins carried in circumferentially spaced bores in each of the cylindrical inner body and the first and second rotatable sleeves, to thereby require that a different operating key be used to operate the lock. A second reset key is provided and is so configured in such a way that the tumblers are positioned so that relative rotation is possible between the first and second inner rotatable sleeves, to provide a further set of tumbler orientations to require additional operating keys in order to operate the lock.