Piston ring for an internal combustion engine
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United States of America Patent
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Nov 22, 2016
Issued Date -
N/A
app pub date -
Feb 15, 2013
filing date -
Feb 17, 2012
priority date (Note) -
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Abstract
A piston ring for sealing a cylinder wall to a piston body is provided. The piston ring includes a ring body of an elastically deformable material which extends substantially circumferentially around an axis and has an inner face that faces the axis. The inner face includes a plurality of axially spaced and radially inwardly extending contact features. The ring body configured to bias the contact features into engagement with the piston body to establish a seal therebetween. At least one of the contact features extends substantially continuously around a circumference for establishing a substantially continuous seal around the piston body, and at least one of the contact features is non-continuous and has at least one recessed area for allowing the passage of oil and gas therethrough.
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