Electro-hydraulic actuating device and a fast-switching magnetic

Details Electro-hydraulic actuating device and a fast-switching magnetic Electro-hydraulic actuating device and a fast-switching magnetic

1981-05-19

1982-08-10

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13759616, 13759617, 137DIG2, F16K 1102

Patent

active

043433316

ABSTRACT:
An electro-hydraulic actuator is disclosed, particularly for use with control surfaces in aircraft. The actuator includes a regulating piston and cylinders and 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: 2861550 (1958-11-01), Hanna et al.
patent: 3643699 (1972-02-01), Mason
patent: 3828818 (1974-08-01), Hunt

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