Balanced dual chamber oil pump

Details Balanced dual chamber oil pump Balanced dual chamber oil pump

1982-05-17

1984-04-17

Gluck, Richard E.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417304, 417308, F04B 4708

Patent

active

044431619

ABSTRACT:
In an oil pump of the type comprising a cartridge having an elliptical cam ring in which a rotor having a plurality of vanes is rotated to form a pair of pump chambers symmetric with respect to an axis of rotor, and a pair of suction passages and two pairs of discharge passages are provided for the pair of pump chambers. A valve opening is formed coaxially with the rotor in a pump body secured to one side of the cartridge to contain the spool valve. A metering orifice is provided in a discharge passage to actuate the spool valve in response to a pressure differential such that when the pump speed is low all outputs of both pump chambers are supplied to a load, whereas when the pump speed is high a portion of the outputs is supplied the suction side. According to this construction it is possible to decrease power consumption and to decrease the size and weight of the oil pump.

REFERENCES:
patent: 2887060 (1959-05-01), Adams et al.
patent: 2910944 (1959-11-01), Pettibone
patent: 3067689 (1962-12-01), Hause

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