Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means
Patent
1989-07-28
1991-10-08
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Electrical input and feedback signal means
91378, 91521, 91523, 91529, F15B 909
Patent
active
050543695
ABSTRACT:
A multiplexed hydraulic control system having a plurality of channels and a common source of modulated hydraulic fluid. The common source is shared among the plurality of channels by providing a plurality of selector valves, one for each channel, with electrical solenoids for the selector valves being individually controlled by a control means. In a normal operating mode, the selector valves are operated individually and the modulating means is controlled to direct fluid to the selected channel in accordance with the demands placed on movement of the actuator in that channel. In a second slewing mode, multiple selector valves are energized at the same time and the modulator is controlled to produce sufficient fluid flow to slew all of the actuators in the selected channels at a desired rate.
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"Imagine . . . A Self-Calibrating Pressure Transducer" advertisement for Scanivalve Corp., San Diego, Calif., 1987.
"Metering Valve W/Regulator" article, Tech Data South Bend Controls Inc. Bulletin, PV-210, SBC, 1987.
"Metering Valve" article, Tech Data South Bend Controls Inc. Bulletin, PV-211, SBC, 1987.
Article entitled "Actuator Accepts Electrical Digital Control Signals Directly--Eliminates Digital-To-Analog Converters".
Wardle John W.
Wernberg Donald E.
Kapsalas George
Look Edward K.
Woodward Governor Company
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