Piston ring for an internal combustion engine
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United States of America Patent
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Mar 8, 2016
Grant Date -
Feb 12, 2015
app pub date -
Feb 8, 2013
filing date -
Feb 8, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a piston ring (10, 110, 210, 310, 410, 510, 610) for pistons of internal combustion engines, having a ring running surface (14), a ring back (11), an upper ring flank (12), a lower ring flank (13), and two ring joint ends spaced apart by a gap (15). According to the invention, at least one opening (17, 121, 217, 223, 325, 407) is provided in the ring running surface (14), which opening forms a fluid connection between the ring running surface (14) and the ring back (11) or a ring flank (12, 13).
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