Apparatus for controlling a hydraulic single acting cylinder

Details Apparatus for controlling a hydraulic single acting cylinder Apparatus for controlling a hydraulic single acting cylinder

1986-07-07

1988-03-01

Chambers, A. Michael

Motors: expansible chamber type

Constantly applied motive fluid with controlled venting

91363R, 91459, F15B 1302

Patent

active

047277912

ABSTRACT:
An apparatus for controlling a hydraulic single acting cylinder has first and second solenoid operated valves disposed in a supply line through which a working fluid is supplied to a working chamber defined in the cylinder which a piston is disposed, a third solenoid operated valve disposed in a return line through which the working fluid returns from the working chamber to a hydraulic tank, and a control unit for controlling the first to third solenoid operated valves. The second and third solenoid operated valves are solenoid operated proportional pressure control valves so that the piston speed can be regulated.

REFERENCES:
patent: 3295421 (1967-01-01), McCormicle
patent: 3763744 (1973-10-01), Fournell et al.
patent: 3802318 (1974-04-01), Sibbald
patent: 4136600 (1979-01-01), Heiser
patent: 4579042 (1986-04-01), Neff
patent: 4585205 (1986-04-01), Coppola et al.

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