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Patent Searching and Data


Title:
WASHER
Document Type and Number:
Japanese Patent JP2011231860
Kind Code:
A
Abstract:

To provide a washer which can enhance a corotation preventing effect.

The washer 10 is composed of a flat plate provided with a bolt inserted hole 11 in its center and has on surface coming into contact with a fastener a recessed portion 14 which comprises a plurality of linear shapes or curvilinear shapes, a plane portion 16 which is formed so as to cut off the recessed portion, and a protuberance 15 which is formed on end and both sides of the recessed portion. Thereby, a nonslip effect becomes higher and the corotation preventing effect can be enhanced because sense of the protuberance can be made in multi directions. Moreover, it is possible to form a plane portion as annulus or quadrangle with the recessed portion spaced apart from each other as predetermined.


Inventors:
ONO MAMORU
Application Number:
JP2010102801A
Publication Date:
November 17, 2011
Filing Date:
April 28, 2010
Export Citation:
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Assignee:
ONO SEISAKUSHO:KK
International Classes:
F16B43/00; F16B39/24
Domestic Patent References:
JP2009144883A2009-07-02
JPS57146910A1982-09-10
JP2003172332A2003-06-20
JPS301322Y1
Attorney, Agent or Firm:
Kazuhiko Nakakura