Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 29, 2021
Patent Application Number
15612062
Date Filed
June 2, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer.
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