Pressure control in hydraulic systems

Details Pressure control in hydraulic systems Pressure control in hydraulic systems

1973-10-09

1976-05-18

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 100

Patent

active

039573966

ABSTRACT:
A hydraulic system including a variable-delivery pump and a pressure compensator having a spring load applied to one end of the compensator spool. Means are provided for applying a force to the other end of the compensator spool proportional to the pressure obtained from a variable pressure-dividing system connected between the pressure line and tank. This pressure dividing system may consist of a pair of restrictors at least one of which is adjustable. Alternatively, it may consist of a spring-loaded check valve between the pressure line and the compensator chamber and a restrictor from the compensator chamber to tank.

REFERENCES:
patent: 2403371 (1946-07-01), Ifield et al.
patent: 2424035 (1947-07-01), Ifield
patent: 3063381 (1962-11-01), Budzich
patent: 3512178 (1970-05-01), Russell
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3669569 (1972-06-01), Wagenseil
patent: 3669570 (1972-06-01), Himmler
patent: 3768928 (1973-10-01), Miller et al.
patent: 3820920 (1974-06-01), Klimaszewski

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