Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1980-11-19
1983-12-20
Vrablik, John J.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
418 15, 418159, F04B 4902, F04B 4908, F04C 200, F04C 1502
Patent
active
044214626
ABSTRACT:
A pump of vane type which sucks in and discharges fluid includes a pump body which is provided with at least two sets of intake ports and discharge ports, which communicate with a low pressure chamber and a high pressure chamber, respectively. An intake port and a discharge port of each set is spaced apart in substantial coincidence with a spacing between a pair of adjacent vanes, and an intake port (or a discharge port) of a second set is located between an intake port and a discharge port of a first set. Means is provided which controls the communication between selected intake ports and the low pressure chamber and between selected discharge ports and the high pressure chamber. Depending on the control provided by the control means, the entire quantity of fluid which has been withdrawn into the space between a pair of vanes can be discharged to the high pressure chamber, or a part of the fluid may be returned to the low pressure chamber while discharging the remainder to the high pressure chamber, thus providing a variable discharge of fluid.
REFERENCES:
patent: 3120814 (1964-02-01), Mueller
patent: 4184813 (1980-01-01), Rylewski
patent: 4272227 (1981-06-01), Woodruff
Jidosha Kiki Co. Ltd.
Vrablik John J.
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