Variable displacement balanced vane pump

Details Variable displacement balanced vane pump Variable displacement balanced vane pump

1979-03-26

1981-06-09

Vrablik, John J.

Pumps

Expansible chamber type

Having separate noncyclic valve

418185, F04B 4902, F04C 200, F04C 1502

Patent

active

042722276

ABSTRACT:
A variable displacement balanced vane pump includes an alternate flow passage for fluid being compressed in an intervane chamber whereby the excess portion of the fluid is by-passed from the pump discharge zone to the pump inlet zone without appreciably increasing the pressure of the excess fluid portion to minimize the required pump input energy.

REFERENCES:
patent: 1482807 (1924-02-01), Newberg
patent: 3120814 (1964-02-01), Mueller
patent: 3295752 (1967-01-01), Bellmer
patent: 3515496 (1970-06-01), Eddy
patent: 4022551 (1977-05-01), Hirosawa

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