PISTON RING
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United States of America Patent
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Issued Date -
Aug 29, 2013
app pub date -
Dec 21, 2010
filing date -
Dec 21, 2009
priority date (Note) -
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Abstract
This invention refers to a piston ring, particularly planned for use in internal combustion engines or compressors, including at least one metallic base (2) to which it is applied, by the physical vapor deposition (PVD) process, a multilayer coating (3) including a periodicity (P), formed by at least one first layer (5) and at least one second layer (5′), being the layers adjacent, bringing one first layer (5) predominantly formed by metallic chromium (5) and one second layer predominantly formed by ceramic chromium (5′).
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