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US Patent 9707820 Tube and shock absorber

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9707820
Patent Inventor Names
Makoto Nishimura2
Mikio Yamashita2
Date of Patent
July 18, 2017
Patent Application Number
14779645
Date Filed
March 25, 2014
Patent Citations Received
‌
US Patent 11892055 Shock absorber
1
Patent Primary Examiner
‌
Vishal Sahni
Patent abstract

A tube having sealing ring grooves formed by a sequential rotational process and a shock absorber including the tube, in which durability of a sealing ring fitted in each of the sealing ring grooves is enhanced. An inclination angle (θ1) formed with respect to a plane (PL1) perpendicular to an axis of a separator tube by a side surface of the sealing ring groove, which is located on an opening end side of the separator tube, is set to 8° or more. With this, a maximum tensile stress to be applied to an O-ring can be reduced to be smaller than a maximum tensile stress in a case of using a backup ring. As a result, the durability of the O-ring can be set equivalent to or enhanced to be higher than durability in the case of using the backup ring.

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