초록 ▼

A plunger lock with a readily removable core is disclosed. The lock has a cylindrical housing and a core. The core is provided with a detent which is retractable when the proper key is inserted in the keyway of the core to permit rotation of the core within the housing. The rotation and longitudinal

A plunger lock with a readily removable core is disclosed. The lock has a cylindrical housing and a core. The core is provided with a detent which is retractable when the proper key is inserted in the keyway of the core to permit rotation of the core within the housing. The rotation and longitudinal movement of the core within the housing is defined by the cooperation of a stop in a locking/unlocking groove formed on the core to permit the core to move longitudinally between locked and unlocked positions. The keyway opens to the surface of the core adjacent the locking/unlocking groove. A core insertion/removal groove is formed on the core adjacent the keyway on the opposite side from the locking/unlocking groove. A normal operating key which is inserted in the keyway permits retraction of the detent so that the core may be moved between the locked and unlocked positions, but prevents passage of the stop between the locking/unlocking groove and the core insertion/removal groove. When a removal key having a slot permitting passage of the stop between the locking/unlocking groove and the insertion/removal groove is employed, the core may be readily removed from the housing.

대표청구항 ▼

A lock comprising: a cylindrical housing having a longitudinal wall and a stop disposed thereon; a core having a longitudinal surface for presentation to said wall; a locking and unlocking groove formed in said surface for receiving said stop and defining rotational and longitudinal movement of said

A lock comprising: a cylindrical housing having a longitudinal wall and a stop disposed thereon; a core having a longitudinal surface for presentation to said wall; a locking and unlocking groove formed in said surface for receiving said stop and defining rotational and longitudinal movement of said housing with respect to said core therewithin between locked and unlocked positions; a core insertion and removal groove formed in said surface for receiving said stop, said insertion and removal groove having an open end to allow insertion of said core into said housing and removal therefrom; a keyway formed in said core and opening to said surface between said grooves to prevent passage of said stop therebetween when a proper operating key is inserted in said keyway, and to allow said passage when a proper core removal and insertion key having a recess formed on an outer edge adjacent said grooves to accommodate movement of said stop therethrough is used, said operating key lacking said recess; a detent projecting from said surface and responsive to said insertion of said key in said keyway to be retractable; and a first detent recess formed in said wall for receiving said detent when said housing and core are in said locked position.