Control system for a pump

Details Control system for a pump Control system for a pump

1975-11-06

1978-01-10

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 126

Patent

active

040676641

ABSTRACT:
The pump has a regulating element whose position is controlled by means of a first and second piston. The first piston is kept under pressure by the output pressure of the pump. The output side of the pump is also connected to a throttle valve which has a cross-section allowing fluid flow which varies as a function of pressure. The pressure difference created at the throttle valve output relative to the throttle valve input acts on a three-position three-port control valve which control the pressure on the second piston accordingly. The second piston has a larger diameter than the first piston.

REFERENCES:
patent: 3067693 (1962-12-01), Lambeck
patent: 3296797 (1967-01-01), Tlusty
patent: 3495536 (1970-02-01), Fahey
patent: 3679327 (1972-07-01), Riedhammer
patent: 3768928 (1973-10-01), Miller
patent: 3809500 (1974-05-01), Staudenrausch
patent: 3820920 (1974-06-01), Klimaszewski
patent: 3856436 (1974-12-01), Lonnemo
patent: 3946561 (1976-05-01), Reidhammer
patent: 3959969 (1976-06-01), Tittmann

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