Valve control of internal combustion engines by means of a cam-driven rotary piston pump
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United States of America Patent
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Feb 6, 1990
Grant Date -
N/A
app pub date -
Aug 26, 1988
filing date -
Aug 26, 1987
priority date (Note) -
Expired
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Abstract
A rotary piston pump assembly includes a rotary piston pump having a pump housing. First and second outlets lead fluid out of the pump housing. The fluid is returned into the pump housing through the first outlets and the first outlets are closed during a portion of the rotation of the pump.
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