Lock device with removable core

• US 20040011099A1
• Filed: 07/18/2002
• Published: 01/22/2004
• Est. Priority Date: 07/18/2002
• Status: Active Grant

• Current Assignee: Assa AB (Assa Abloy AB)
• Original Assignee: Assa AB (Assa Abloy AB)
• Inventors: Andersson, Daniel
• Granted Patent: US 6,718,807 B2
• Time in Patent Office: Days
• US Class Current: 70/371
• CPC Class Codes: E05B 9/086 Fastening of rotors, plugs or cores to an outer stator
• CPC Class Codes: Y10T 70/765 Key only controlled
• CPC Class Codes: Y10T 70/7661 Detachable or removable cylinder
• CPC Class Codes: Y10T 70/7667 Operating elements, parts and adjuncts

Abstract

A removable core lock and key device comprises a cylinder housing (3), a cylinder core (10) accommodated in said cylinder housing, and an essentially cylindrical plug (20) rotatably arranged in the core. A blocking pin (28) is provided in the core and is movable between an extended position, wherein it engages a recess in the cylinder housing, and a retracted position. An actuator element (26a, 26c) is controlled by at least one control pin tumbler. With a control key in the lock, the control pin tumbler displaces the actuator element so that it moves the blocking pin with the rotation of said plug. With a user key in said key slot, said pin tumbler is disengaged from the actuator element and the plug is free to rotate. In other positions the control pin tumbler blocks rotation of the plug and actuator element. A simple yet reliable and secure removable core arrangement is provided.

Claims

1. 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.

2. The device according to claim 1, wherein said actuator element comprises an actuator ring arranged around said plug, said ring having a hole for said at least one control pin tumbler.

3. The device according to claim 1, wherein said actuator element comprises an actuator pin controlling the movement of said blocking pin.

4. The device according to claim 3, wherein the movement of said blocking pin is controlled by means of forced motion.

5. The device according to claim 4, wherein said blocking pin comprises a waist portion, into which an end portion of said actuator pin engages.

6. The device according to claim 1, wherein said at least one control pin tumbler comprises a bottom pin, a spacer, and a top pin.

7. The device according to claim 2, wherein said at least one control pin tumbler comprises a bottom pin, a spacer, and a top pin, and wherein said spacer has a height differing from a thickness of said actuator ring.

8. The device according to claim 7, wherein, with a user key in said key slot, said control pin tumbler is positioned so that a shear line between said bottom pin and said spacer is on a level with a boundary between said plug and said actuator ring, and, with a control key in said key slot, said control pin tumbler is positioned so that a shear line between said spacer and said top pin is on a level with a boundary between said actuator ring and a housing of said cylinder core.

9. The device according to claim 1, comprising a key-controlled sidebar arranged to engage a recess in an inner surface of said actuator ring in a locked position of the lock and key device.