Patent ID: 6718807
Filing Date: 2004-04-13
Classification: E05B,Y10T

Abstract:
A removable core lock and key device comprising:a cylinder housing having an opening therein, the inner surface of said opening having a recess; a cylinder core which is accommodated in said cylinder housing; an essentially cylindrical plug rotatably arranged in said core and having a key slot for reception of a key; a blocking pin provided in said core and being movable between an extended position, wherein it engages said recess, and a retracted position, wherein it is disengaged from said recess; a plurality of pin tumblers provided in said core, each of which pin tumblers blocks rotation of said plug when no key is inserted in said key slot; and an actuator element controlled by at least one control pin tumbler of said pin tumblers, wherein: in a first position of said control pin tumbler with a control key in said key slot, said control pin tumbler rotates said actuator element with the rotation of said plug so that said actuator element moves said blocking pin between said extended and retracted positions; in at least one second position of said control pin tumbler with a user key in said key slot, said control pin tumbler is disengaged from said actuator element and said plug is free to rotate while said control in tumbler blocks rotation of said actuator element; and in a position of said control pin tumbler with no key in said key slot, said control pin tumbler blocks rotation of said plug and said actuator element.