Crankcase oil-barrier system
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United States of America Patent
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Apr 28, 1992
Grant Date -
N/A
app pub date -
Jun 28, 1990
filing date -
Jun 28, 1990
priority date (Note) -
Expired
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Importance
Abstract
A compressor shielded from crankcase oil by a wall having a hole surrounded by a wiper through which a piston rod assembly passes and having the chamber between the crankcase and the underside of the piston provided with a pressure relief valve and an atmosphere vent having a check valve whereby the chamber is never at sub-atmospheric pressure and there is never gas flow through the wiper toward the piston.
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