Multiple hydraulic actuators with series/parallel operation

Details Multiple hydraulic actuators with series/parallel operation Multiple hydraulic actuators with series/parallel operation

1992-09-24

1994-08-09

Look, Edward K.

Power plants

Pressure fluid source and motor

Pulsator

91512, 91519, 91520, F15B 700, F15B 1100, F15B 1300

Patent

active

053354990

ABSTRACT:
The present invention includes a method for improving operating efficiency of a hydraulic actuator loop and an improved hydraulic actuator loop. The method includes transferring hydraulic fluid between a first and a second hydraulic actuator when the actuators are disengaged from a load and transferring hydraulic fluid from an energy source to each of the actuators separately when the actuators engage the load. The method also includes transferring fluid from the energy source to the first actuator when the actuators are approaching the load and transferring fluid from the first actuator to a drain when the actuators are retracting from the load.

REFERENCES:
patent: 1944351 (1934-01-01), Landry
patent: 2292278 (1942-08-01), Lorenz
patent: 3422727 (1969-01-01), Pearson
patent: 3476016 (1969-11-01), Dixon et al.
patent: 3625305 (1971-12-01), Mueller et al.
patent: 3722366 (1973-03-01), Richardson
patent: 4782989 (1988-11-01), Wallin et al.
patent: 4867364 (1989-09-01), Wallin et al.
patent: 5110251 (1992-05-01), Gray

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