Gear pump

Pumps – With condition responsive pumped fluid control – Plural pump units with individual or relative control

Patent

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Details

417310, 417428, 418196, F04B 49035

Patent

active

056094744

ABSTRACT:
A gear pump having three gears, including; a pump case consisting of a pump body and a cover for covering most of the body; three gears which are supported by a rotating shaft on the pump case and engaged with each other in series; first and second gear pumps each composed of one central drive gear and one of the driven gears on both sides of the drive gear; a non-return valve and a flow regulation valve which are opened at a predetermined pressure; an inlet port which is opened at one end of the pump case and connected through a feed path to the suction side of the two gear pumps; an outlet port formed on the discharge side of the first gear pump in the pump case; a regulation path passing from the discharge side of the second gear pump through the non-return valve to the outlet port; and a flow regulation path passing from the regulation path through the flow regulation valve to an oil pan.

REFERENCES:
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patent: 2933158 (1960-04-01), Pitts
patent: 3168043 (1965-02-01), Wiggermann
patent: 3182596 (1965-05-01), Prijatel
patent: 3232234 (1966-02-01), Butterworth
patent: 3824041 (1974-07-01), Rystom
patent: 3873241 (1975-03-01), Motomura
patent: 4165206 (1979-08-01), Martin et al.
patent: 4204811 (1980-05-01), Carter et al.
patent: 4502845 (1985-03-01), Chana
patent: 4838767 (1989-06-01), Ohe et al.
patent: 4850813 (1989-07-01), Fisher
patent: 5087177 (1992-02-01), Haley et al.

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