Title:
BOLT
Document Type and Number:
Japanese Patent JP2005299814
Kind Code:
A
Abstract:
To provide a bolt which is made not to be removable using an all-purpose machine tool after being screwed in so that an accident caused by mischievous removal thereof can be prevented.
A half-spherical head 4 is provided on either edge of a threaded shaft 3 to form the bolt body 5. A rotation imparting member 6 having an outer shape that makes it possible to impart rotations using a machine tool is attached on the half-spherical surface of the head 4 of the bolt body 5. A fixing strength of the rotation imparting member 6 to the half-spherical surface of the head 4 is designed such that the rotation imparting member 6 is detached from the head 4 at the time when a predetermined fastening torque is exerted to the bolt body 5.
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Inventors:
EZAKI NOBUO
Application Number:
JP2004117752A
Publication Date:
October 27, 2005
Filing Date:
April 13, 2004
Export Citation:
Assignee:
TOOLING MEDIA KK
International Classes:
F16B23/00; F16B25/00; F16B31/02; (IPC1-7): F16B23/00; F16B25/00; F16B31/02
Attorney, Agent or Firm:
Bunji Kamada
Higashio Masahiro
Torii Kazuhisa
Higashio Masahiro
Torii Kazuhisa