Servo valve

Details Servo valve Servo valve

1988-02-08

1989-09-05

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Plural servomotors

251 14, 25112911, 1374875, G05B 1132

Patent

active

048642100

ABSTRACT:
An electro-hydraulic servo-valve having a valve spool and comprising: an adjustment motor, and a control apparatus for adjusting said adjustment motor to depending on the input nominal value, wherein said adjustment motor transmits its movement directly to the valve spool of the hydraulic valve, and wherein a preferably electrically operating additional drive is provided which will be switched on in case the valve spool gets stuck so as to release the valve spool from its stuck condition.

REFERENCES:
patent: 3940677 (1976-02-01), Morino et al.
patent: 4133511 (1979-01-01), Hartmann et al.

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