Electro-hydraulic regulating drive and a fast-switching magnetic

Details Electro-hydraulic regulating drive and a fast-switching magnetic Electro-hydraulic regulating drive and a fast-switching magnetic

1979-05-30

1981-08-04

Bleutge, Robert L.

Motors: expansible chamber type

With signal, indicator or inspection means

91323, 91417R, 91459, F15B 2108, B64C 1324

Patent

active

042815843

ABSTRACT:
An electro-hydraulic actuator is disclosed, particularly for use with control surfaces in aircraft. The actuator includes a regulating piston and cylinders an rapidly-operable switching valves for the positioning of the piston in the cylinder that are operated by the supplying of discrete volumes of operating fluid thereto. Switching pulses are applied to the valves by a computer, and a sensor that is responsive to each activation of the switching valves applies an answering pulse to the computer wherein a valve breakdown can immediately be recognized. The sensor may be responsive to changes in pressure and/or flow between the valves and the cylinder located at the valve body.

REFERENCES:
patent: 3813990 (1974-06-01), Coppola et al.
patent: 3872773 (1975-03-01), Denker
patent: 3895560 (1975-07-01), Anderson
patent: 3901273 (1975-08-01), Brouwer et al.
patent: 4037519 (1977-07-01), Miller et al.
patent: 4078749 (1978-03-01), Johnson, Jr. et al.

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