SHOCK ABSORBER AND METHOD FOR MANUFACTURING SLIDING MEMBER
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United States of America Patent
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Sep 5, 2019
app pub date -
Sep 5, 2017
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Jan 30, 2017
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Abstract
A shock absorber of the present invention includes an aluminum alloy-made cylinder having a plasma electrolytic oxide film on an inner periphery, a piston slidably inserted in the cylinder, and a piston rod movably inserted in the cylinder and connected to the piston. Further, a method for manufacturing a sliding member includes a plasma electrolytic oxidation treatment step of forming a plasma electrolytic oxide film with a film thickness of 40 μm or more on a sliding surface of an aluminum alloy-made sliding member, and a polishing treatment step of polishing a surface of the plasma electrolytic oxide film.
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