Fail-safe single-stage servovalve

Fluid handling – Pressure modulating relays or followers – Jet control type

Patent

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Details

91 3, G05D 1600

Patent

active

044428553

ABSTRACT:
A single-stage servovalve has a movable member operatively arranged to selectively divide a continuously-discharged fluid jet between two receiver passages. The hydraulic output of the valve is the differential between the conditions in the receivers. In the event of a hard-over failure of the control system of which the servovalve is a part, a jet deflector surface becomes operative to create a substantially balanced hydraulic condition in the receiver passages, thus terminating control.

REFERENCES:
patent: 3137309 (1964-06-01), Blase
patent: 3542051 (1970-11-01), McFadden
patent: 3866620 (1975-02-01), Morton

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