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Patent Searching and Data


Title:
HANDLE LOCK
Document Type and Number:
Japanese Patent JP2003049565
Kind Code:
A
Abstract:

To provide a handle lock capable of promoting burglar-proof efficiency by completely preventing an unjust unlocking operation, above all, an attack operation to a hard cap.

The handle lock is constituted of a handle case 2 stored in a housing 1 in a drawable manner, a cylinder lock 4 coating the front with the hard cap 3, stored in the handle case 2 and controlling a drawable operation of the handle case 2 and a protection ring 5 formed of a hard material having difficulty in making perforation operation by at least a drill and having no uneven step on the circumference for surrounding the circumferential edge of the hard cap 3 up to the back rather than the rear end, and the protection ring 5 is so constituted that the diameter of a conical surface 6 gradually reduced as it goes backward is formed.


Inventors:
YOKOTA KATSUYOSHI
FUJISHIRO KAZUYOSHI
Application Number:
JP2001000237007
Publication Date:
February 21, 2003
Filing Date:
August 03, 2001
Export Citation:
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Assignee:
ALPHA CORP
International Classes:
E05B5/04; E05B5/00; E05B17/00; (IPC1-7): E05B5/04; E05B5/00; E05B17/00
Attorney, Agent or Firm:
山川 雅男



 
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