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Title:
BOLT
Document Type and Number:
WIPO Patent Application WO/2015/098141
Kind Code:
A1
Abstract:
Provided is a bolt which can be tightened without a special tool and which is extremely difficult to be loosened (removed) after tightened. This bolt (A, B) comprises a fastening bolt (1), a tightening bolt (2), and a lock section (3). A first engagement section (13) is provided at one end of a fastening bolt shaft (11), and a recess (14) is provided in the center of the bolt shaft. The tightening bolt (2) has, on the surface thereof which faces the first engagement section (13), a second engagement section (23) and a fastening shaft (22) which is slidably inserted into the recess (14). When the tightening bolt is rotated only in one direction, the first engagement section and the second engagement section engage with each other to thereby rotate the fastening bolt, and when tightening force which rotates the fastening bolt only in one direction reaches predetermined torque, a portion having reduced strength breaks, and the tightening force of the tightening bolt is not transmitted to the fastening bolt.

Inventors:
HASEGAWA, Kenji (1-10-12, Sengen-cho Nishi-ku, Yokohama-sh, Kanagawa 72, 〒2200072, JP)
Application Number:
JP2014/059200
Publication Date:
July 02, 2015
Filing Date:
March 28, 2014
Export Citation:
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Assignee:
LOCK'N BOLT CORPORATION (1-10-12, Sengen-cho Nishi-ku, Yokohama-sh, Kanagawa 72, 〒2200072, JP)
International Classes:
F16B41/00; F16B35/00
Foreign References:
US6238155B1
JP2009275714A
JP2012057772A
JPH11294431A
JP2010255675A
Attorney, Agent or Firm:
SATOH, TAKAHISA (Sohshin International Patent Office, Choyu Landic Building 8F 1-11, Shinbashi 3-chome, Minato-k, Tokyo 04, 〒1050004, JP)
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