PISTON RING WITH COMPOSITE COATING
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United States of America Patent
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Issued Date -
Apr 10, 2014
app pub date -
May 24, 2012
filing date -
May 25, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A piston ring has a piston ring basis element, of a material having a first thermal expansion coefficient, a wear protection layer, arranged on a radially outer face of the piston ring, that is made of a material having a second thermal expansion coefficient being smaller than the first thermal expansion coefficient, and including an intermediate layer, arranged between the piston ring basis element and the wear protection layer. The intermediate layer is made of a material having a third thermal expansion coefficient, that is bigger than the first thermal expansion coefficient.
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