Fluid handling – Systems – Supply and exhaust
Patent
1974-12-18
1976-08-10
Cohan, Alan
Fluid handling
Systems
Supply and exhaust
91370, F15B 1314
Patent
active
039735893
ABSTRACT:
A control valve for hydraulic servo-steering systems embodying connections for a pressure-source, a discharge and a servo-steering motor provided with a valve member, with the valve member being connected with one section of a divided steering shaft or spindle, in which one or a plurality of adjustable control pistons or reaction pistons are arranged preferably transverse and off-center to the axis of the valve member, and are activated by an activator device rotatable through a small angle relative to the valve member, and connected with the other section of the steering spindle, the activator means being positioned with one part of its length in or on the valve member, whereby the valve member is rotatably and axially immovably positioned in a generally affixed connection body, or in a sleeve connected therewith, in a manner so that the supply and release of a pressure medium into or out of the valve member, independent of the relative position of the connection body and valve member to each other, is guaranteed with the aid of bores and annular grooves, the control valve including a removable cap exposing means which the control or reaction pistons can be adjusted while the hydraulic system is still operative.
REFERENCES:
patent: 2930357 (1960-03-01), Brueder
patent: 3180233 (1965-04-01), Jablonsky
Cohan Alan
Langen & Co.
Michalsky Gerald A.
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