Arrangement for regulating a supply flow and for limiting a supp

Details Arrangement for regulating a supply flow and for limiting a supp Arrangement for regulating a supply flow and for limiting a supp

1979-11-19

1985-05-21

Look, Edward K.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417218, F04B 126

Patent

active

045183228

ABSTRACT:
An arrangement for regulating supply flow and limiting supply pressure of an adjustable pump, has a flow regulating valve, a control spring and a throttling element for controlling the flow regulating valve and arranged so that a primary pressure takes place upstream and a secondary pressure takes place downstream of the throttling element so as to form a pressure differential, an adjusting member operative for adjusting the pump and controllable by the throttling element, a servo element operative for forming communication with a pressureless space in the event when the supply pressure exceeds a predetermined value so that the pump is adjusted back to a smaller supply, as second throttling element arranged to bring the secondary pressure to the flow regulating valve, and a third throttling element arranged to vary the secondary pressure, connected in series with the servo valve, and first operating when the latter is open.

REFERENCES:
patent: 3700356 (1972-10-01), Kubik
patent: 3722366 (1973-03-01), Richardson
patent: 4067664 (1978-01-01), Robeller
patent: 4194364 (1980-03-01), Pahl et al

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