Control valve for pressure-medium servo-motor

Motors: expansible chamber type – Differential – Motive fluid constantly applied to one working member face

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Details

91371, 91373, 91434, F15B 1517, F15B 1314

Patent

active

040647897

ABSTRACT:
A control valve for a pressure medium servo-motor of a servo-steering mechanism whose valve-adjusting member includes a reaction pressure surface that is immovable relative thereto and is adapted to be acted upon by the reaction pressure in a reaction pressure chamber connected exclusively to one of the two working pressure chambers of the working cylinder of the servo-motor; the valve-adjusting member is also connected with the reaction piston in such a manner as to enable a limited free relative adjusting path between the valve-adjusting member and the reaction piston; the reaction piston, in its turn, includes a reaction relief pressure surface which is adapted to be acted upon by the reaction pressure in a reaction pressure chamber connected exclusively to the same working pressure chamber and which is oppositely directed to the reaction pressure surface; the reaction piston is also supported with respect to the valve housing by means of a spring member which is under a prestress force while its reaction relief pressure surface is arranged in a reaction pressure chamber of the valve housing.

REFERENCES:
patent: 2679234 (1954-05-01), Robinson
patent: 2719511 (1955-10-01), Presnell
patent: 2824447 (1958-02-01), Garrison
patent: 2985145 (1961-05-01), Foerster et al.

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