Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – One path includes restriction
Patent
1978-07-10
1980-05-27
Michalsky, Gerald A.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
One path includes restriction
91 32, 91363A, 91510, 13759616, F15B 13043, F15B 2000
Patent
active
042044570
ABSTRACT:
A device for controlling hydraulic motors as in an aircraft "fly-by-wire" system wherein redundant hydraulic motors and controls are required to protect against failure of portions of the system or device. The device includes two master valves for controlling flow of fluid to and from the motors, one controlled by electrical signals from a command station and the other controlled mechanically through manual or automatic operation. There is a transfer valve for selecting which of the master valves is to be operable and to provide for smooth transition of control from the electrically controlled valve to the mechanically controlled valve. The electrically controlled valve is positioned by means of an articulated command shaft of hybrid force displacement summing structure having redundant hydraulic drive units each controlled by redundant electro-hydraulic servo valves and wherein failed servo valves are accounted for in the force displacement summing structure in a manner to avoid the need for rapid failure detection and correction.
REFERENCES:
patent: 2652812 (1953-09-01), Fenzl
patent: 3901128 (1975-08-01), Swogger
Michalsky Gerald A.
Parker-Hannifin Corporation
Wolfram John N.
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