Rotary control valve

A rotary control valve 10 includes a directional control valve 12 having a rotatable valve element 13 for controlling the direction of fluid flow from an input passage 23 to a pair of control ports 18,19 and from the control ports 18,19 to a drain passage 21. A pressure regulating valve 14 is connec...

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Bibliographische Detailangaben
Hauptverfasser:	MICHAEL L. KNUSSMAN, WILLIAM J SPIVEY JR, ARLYN P. WILCOX
Format:	Patent
Sprache:	eng
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MOTOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	A rotary control valve 10 includes a directional control valve 12 having a rotatable valve element 13 for controlling the direction of fluid flow from an input passage 23 to a pair of control ports 18,19 and from the control ports 18,19 to a drain passage 21. A pressure regulating valve 14 is connected to a source of pilot pressure and has a valve spool 16 for controlling the regulated pressure level of pilot fluid in the input passage 23. A cam (38, Fig 3) is connected to the valve element 13 for unitary rotation therewith. A pair of springs 66,67 and a plunger 64 are disposed between the valve spool 16 and the cam (38) so that the valve spool 16 is mechanically moved in a rectilinear direction by the cam (38) in either direction from a neutral position to increase the level of the regulated pressure in the input passage 23 proportional to the degree of rotation of the rotatable valve element 13.