The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2002
Filed:
Dec. 06, 1999
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B 3/932 ; F16B 3/9282 ;
U.S. Cl.
CPC ...
F16B 3/932 ; F16B 3/9282 ;
Abstract
A present invention provides a locking mechanism capable of preventing a bolt from loosening. A bolt has a head provided with a first part which comprises openings . A locking washer is provided with a second part which includes outer projections and a third part which includes insertion projections on an outer edge. A taper piece has a portion provided with a fourth part which comprises openings . The first part and the second part can engage with each other and the third part and the fourth part can engage with each other when said bolt fastens at least two members and trough said washer and said taper piece . Accordingly, the bolt is prevented from rotating in an loosening direction.