Patent ID: 6725696
Filing Date: 2004-04-27
Classification: B23C,E05B,G05B,Y02P,Y10T

Abstract:
A tumbler lock including, a lock body, a barrel assembly mounted in said lock body for relative movement about an axis of rotation, a retention means being operative to retain said barrel assembly against removal from said lock body and including a movable member, said barrel assembly including a plurality of disc tumblers, each of which is rotatable about said axis of rotation relative to each other, said disc tumblers including at least one standard disc tumbler and at least one dual function disc tumbler, and a side locking bar which is operative to prevent rotation of said barrel assembly relative to said lock body when said tumbler lock is in a locked condition, said side locking bar being inoperative to prevent said barrel assembly rotation when each said standard disc tumbler is in a service position of rotation relative to said lock body and said dual function disc is in either a service position of rotation or a second function position of rotation relative to said body, said movable member interacting with said dual function disc tumbler when said dual function disc tumbler is in said second function position of rotation so as to thereby render said retention means inoperative to prevent said removal of said barrel assembly, whereby said barrel assembly is able to be removed from said lock body when each said standard disc tumbler is in said service position and said dual function disc tumbler is in its respective said second function position.