Variable displacement fluid pump
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United States of America Patent
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-
Jan 6, 1987
Grant Date -
N/A
app pub date -
Dec 12, 1985
filing date -
Dec 13, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable displacement fluid pump comprises a rotor rotatably disposed within a housing, an eccentric ring movable close to and apart from the rotor to change a first eccentricity between a center of an inner periphery of the eccentric ring and a fixed center of rotation of the rotor so as to vary a displacement of the pump, and a plurality of pumping chambers each having a variable volume which changes sequentially to introduce thereinto fluid from an inlet port and to discharge therefrom fluid to a discharge port as the motor rotates. The rotor is so disposed that the fixed center of rotation of the rotor is spaced apart by a predetermined second eccentricity from a locus of the center of the inner periphery of the eccentric ring towards the discharge port.
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