WIRE FOR PISTON RING, AND MANUFACTURING METHOD OF PISTON RING
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United States of America Patent
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May 12, 2022
app pub date -
Dec 17, 2020
filing date -
Dec 17, 2020
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Abstract
In a surface of a wire, a first side surface forming an outer circumferential surface in a piston ring includes a tapered surface and a protruding surface, the protruding surface is divided into a first part and a second part by a first virtual surface extending from the tapered surface, and the first part includes a top and is formed in a protruding shape.
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