Variable delivery hydraulic pump

Details Variable delivery hydraulic pump Variable delivery hydraulic pump

1976-06-29

1978-02-07

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 126

Patent

active

040724425

ABSTRACT:
A variable delivery hydraulic pump having at least one pilot plunger, an operating plunger for adjusting the displacement of variable control element, and a first and a second spool for controlling travels of the plungers towards the variable control element side so that a single pumping element may precisely, stably carry out the two pressure-two volume control of the pump.

REFERENCES:
patent: 2931176 (1960-04-01), Bloch et al.
patent: 3188971 (1965-06-01), Puryear
patent: 3625637 (1971-12-01), Kiwalle
patent: 3750405 (1973-08-01), Lech et al.
patent: 3861145 (1975-01-01), Hall et al.
patent: 3924969 (1975-12-01), Rometsch
patent: 3952509 (1976-04-01), Coleman
patent: 3959969 (1976-06-01), Tittmann

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