Electro-hydraulic servovalve having mechanical feedback

Details Electro-hydraulic servovalve having mechanical feedback Electro-hydraulic servovalve having mechanical feedback

1996-01-11

1996-11-12

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762564, F15B 13043

Patent

active

055730361

ABSTRACT:
The invention is a multi-stage electro-hydraulic servovalve having a mechanical feedback between the valve's main and pilot stages. The feedback mechanism makes use of an interconnected set of linkages that transform a linear motion of the main stage slide into a rotative movement of a torque rod that can produce a translation of the pilot stage slide. Many of the linkages of the feedback mechanism are located exterior to the valve's fluid boundary and feature readily adjustable connections through which a user can adjust various parameters of the feedback such as the degree of gain and null point.

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patent: 4674539 (1987-06-01), Sloate
patent: 4762147 (1988-08-01), Sloate
patent: 5031653 (1991-07-01), Wilson et al.

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