Externally adjustable load plus pump control assembly

Details Externally adjustable load plus pump control assembly Externally adjustable load plus pump control assembly

1977-10-12

1978-11-07

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60445, 60452, 417222, F04B 4900

Patent

active

041243331

ABSTRACT:
A pump control assembly for a variable displacement pump has a means connected to a spring for selectively adjusting the preload on the spring for selectively adjusting the minimum pump discharge pressure. An adjustable stop device is provided for selectively adjusting the maximum force exerted on the spring by a piston device which increases the load on the spring for increasing the pump discharge pressure in response to a load pressure signal exceeding a preselected pressure level.

REFERENCES:
patent: 3350881 (1967-11-01), D'Amato
patent: 3797245 (1974-03-01), Hein
patent: 4028890 (1977-06-01), Habiger et al.
patent: 4034564 (1977-07-01), Johnson et al.
patent: 4074529 (1978-02-01), Budzich

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