Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hironobu Imaizumi0
Date of Patent
July 5, 2011
0Patent Application Number
118838750
Date Filed
February 10, 2006
0Patent Primary Examiner
Patent abstract
A coned disc spring is arranged between a second component and a third component provided inside a tubular first component and movable in an axial direction. The coned disc spring comprises a body having a circular dish shape, teeth closely fitting into spline grooves formed on an inner peripheral surface of the first component and projecting to a radial outer side on an outer periphery of the body, and a stress relaxation portion formed in a flat shape or a curved shape at an edge portion of a circular arc portion at the base of the tooth in a direction at least one of a circumferential direction and a radial direction of the body.
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