Title:
AN ANTI-PICKING AND ANTI-THEFT LOCK CYLINDER
Document Type and Number:
WIPO Patent Application WO/2005/124067
Kind Code:
A1
Abstract:
An anti-theft lock cylinder that can prevent from picking adapts to use in all the locks controlled by the rotation of lock cylinder. The present invention is based on the structure of the prior art, a noncircular position-limit part provided between a cylindrical shell and a tumbler, a limited block connected to the position-limit part can effectively limit the rotation of the tumbler when the key does not insert into the lock; an additional slot for the pins or the plate tumblers is provided at the axial direction or the radial direction of the slot for the pins or the plate tumblers in the cylindrical shell, the tumbler can be limited many times, so that it is more difficult to unlock the lock by a universal key, and the lock cylinder even can not be unlocked by a universal key. Not only the structure of the anti-picking and anti-theft lock cylinder is simple and reasonable, the manufacturing engineering of the lock cylinder is simple, furthermore, its cost lower and easy to produce, but also it can prevent from picking, torsion break and illegality unlocking. It is adapted for use primarily as a theft deterrent for doors, safe cases, bicycles, motorcycles, cars, and also it can be made into chain locks, butterfly-type locks, U-type locks and Padlocks etc.
Inventors:
CHEN GUOZHONG (CN)
Application Number:
PCT/CN2005/000529
Publication Date:
December 29, 2005
Filing Date:
April 18, 2005
Export Citation:
Assignee:
CHEN GUOZHONG (CN)
International Classes:
E05B25/00; E05B27/00; E05B27/02; E05B29/00; E05B29/04; (IPC1-7): E05B25/00; E05B27/02; E05B29/04
Domestic Patent References:
| WO1991014064A1 | 1991-09-19 |
Foreign References:
| US6439016B1 | 2002-08-27 | |||
| US5295377A | 1994-03-22 | |||
| US4193277A | 1980-03-18 | |||
| DE4101978C1 | 1992-05-07 | |||
| CN1074010A | 1993-07-07 | |||
| CN1237674A | 1999-12-08 | |||
| CN1483913A | 2004-03-24 | |||
| JPH09132976A | 1997-05-20 |
Attorney, Agent or Firm:
Shouchuang Junhe, Patent Agent Ltd Xiamen CO. (N0.191 Changqing Road Xiamen, Fujian 2, CN)
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