Lock device with removable core

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;
• 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 displaces said actuator element so that said actuator element moves said blocking pin between said extended and retracted positions with the rotation of said plug,
• in at least one second position of said control pin tumbler with a user key in said key slot, said pin tumbler is disengaged from said actuator element and said plug is free to rotate, and
• in other positions of said control pin tumbler, said control pin tumbler blocks rotation of said plug and actuator element.