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Title:
LOCKING WASHER AND SCREW WITH WASHER PROVIDED WITH THE WASHER
Document Type and Number:
Japanese Patent JP2006242324
Kind Code:
A
Abstract:

To solve problems wherein molding of a conventional washer with a crest for locking is difficult and requires time and labor and high cost.

This locking washer can be set or mounted on rear surface sides of respective head parts of screws. Biting projections capable of biting an object to be tightened are formed by protruding downward in a few sections in the peripheral direction of an outer peripheral fringe part of a rear surface of the washer, and washer projections are formed on a surface of the washer to mesh with head part projections formed on rear surfaces of the head parts of the screws. A recessed part can be formed around a root part of the biting projection. The biting projection is formed in a section which is a rear surface outer peripheral fringe part of the washer and has no washer projection. This screw with the locking washer attaches the locking washer to the rear surface sides of the head parts of the screws to let the washer projection mesh with the head part projection of the screw.


Inventors:
NAKAJIMA KAZUO
Application Number:
JP2005060798A
Publication Date:
September 14, 2006
Filing Date:
March 04, 2005
Export Citation:
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Assignee:
MARUNAKA KK
International Classes:
F16B39/24; F16B43/00
Domestic Patent References:
JPS62174112U1987-11-05
JPS61191520U1986-11-28
JPS6132813U1986-02-27
JPH0814242A1996-01-16
JPH09170616A1997-06-30
JPS60167226U1985-11-06
JPS5514367A1980-01-31
Attorney, Agent or Firm:
Masaharu Kobayashi



 
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