Variable displacement pump system

Details Variable displacement pump system Variable displacement pump system

1984-02-03

1985-05-21

Look, Edward K.

Pumps

Condition responsive control of drive transmission or pump...

Reversible flow pump

60389, 60392, 60443, 60452, 13759613, 417218, 417222, F04B 126

Patent

active

045183198

ABSTRACT:
A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in series between the displacement control valve and the pistons. When an override pressure is achieved, the override valve blocks communication of the control valve with the pair of pistons and communicates the pump workports directly to the pistons for rapid destroking.

REFERENCES:
patent: 3164960 (1965-01-01), Weisenbach et al.
patent: 3191382 (1965-06-01), Weisenbach
patent: 3350881 (1967-11-01), D'Amato
patent: 3416452 (1968-12-01), Misulis
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3669570 (1972-06-01), Himmler
patent: 3694108 (1972-09-01), Pensa
patent: 3746115 (1973-07-01), Bosch
patent: 3758235 (1973-09-01), Breeden
patent: 3941514 (1976-03-01), Louis et al.
patent: 4212164 (1980-07-01), Young
patent: 4456434 (1984-06-01), El Ibiary
Abex Corp., Hydrostatic Transmission Manual, Chap. 2, "Gold Cup Circuitry", pp. 2.1 and 2.3, Apr. 1980.

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