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Patent Searching and Data


Title:
THUMB TURN UNAUTHORIZED RELEASE PREVENTING DEVICE
Document Type and Number:
Japanese Patent JP2004156401
Kind Code:
A
Abstract:

To provide a thumb turn unauthorized release preventing device which is resistant to unauthorized release of a thumb turn, does not hinder normal operation of the thumb turn, and advantageous in mounting work and in parts count.

The thumb turn unauthorized release preventing device is provided for the thumb turn 10 which is formed so as to protrude/retreat a dead bolt 3 from a lock box 1 by rotating a knob portion 11 arranged on an indoor side. According to the device, the knob portion 11 is formed so as to be axially perpendicular and to have a circular cross section.


Inventors:
MATSUURA MASAAKI
Application Number:
JP2002000325582
Publication Date:
June 03, 2004
Filing Date:
November 08, 2002
Export Citation:
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Assignee:
MATSUURA MASAAKI
International Classes:
E05B13/08; E05B45/06; (IPC1-7): E05B13/08; E05B45/06
Attorney, Agent or Firm:
八田 幹雄
野上 敦
奈良 泰男
齋藤 悦子
宇谷 勝幸