Motors: expansible chamber type – With motive fluid valve – Electrically operated
Patent
1988-01-12
1989-06-20
Garrett, Robert E.
Motors: expansible chamber type
With motive fluid valve
Electrically operated
91471, 60326, 137909, 25112921, 73 60, F15B 13044
Patent
active
048401129
ABSTRACT:
Electrically controlled combined valve/cylinder apparatus. The apparatus includes a housing having a cylindrical body and spaced first and second end walls closing the body. A cylinder is positioned inside the body and a piston is positioned inside the cylinder for reciprocal movement. A control ram connected to the piston extends through an aperture in the first end wall so that the piston is movable between a first position adjacent the first end wall in which the ram is extended and a second postion in which the piston is located adjacent the second end wall so that the ram is retracted. The apparatus further includes a cylindrical control sleeve positioned between and spaced from both the body and the cylinder. An inlet port tube is provided for supplying an electro-rheological fluid to the body while an outlet port tube is provided for discharging the fluid from the body. The control sleeve, the body and the cylinder are each at least partially electrically conductive and together form four electrostatically controlled valves. The actuation of the first and third valve causes the ram to retract and the actuation of the second and fourth valves causes the ram to extend.
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Bhadra Dilip K.
Creedon Richard L.
Harder C. Ross
Denion Thomas
GA Technologies Inc.
Garrett Robert E.
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