Fluid handling – Systems – With selective motion for plural valve actuator
Patent
1996-05-02
1999-11-09
Walton, George L.
Fluid handling
Systems
With selective motion for plural valve actuator
13762521, 60444, 91375R, 180 644, B62D 1118, F16R 31524
Patent
active
059795042
ABSTRACT:
A rotary control valve includes a directional control valve having a rotatable valve element for controlling the direction of fluid flow from an input passage to a pair of control ports and from the control ports to a drain passage. A pressure regulating valve is connected to a source of pilot pressure and has a valve spool for controlling the regulated pressure level of pilot fluid in the input passage. A cam is connected to the valve element for unitary rotation therewith. A spring and a plunger are disposed between the valve spool and the cam so that the valve spool is mechanically moved in a rectilinear direction by the cam in either direction from a neutral position to increase the level of the regulated pressure in the input passage proportional to the degree of rotation of the rotatable valve element.
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Knussman Michael L.
Spivey William J.
Wilcox Arlyn P.
Burrows J. W.
Caterpillar Inc.
Grant John W.
Walton George L.
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