Rotary valve for power steering apparatus

Details Rotary valve for power steering apparatus Rotary valve for power steering apparatus

1990-09-12

1991-12-03

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

13762524, 91375A, F15B 1302, F16K 11076

Patent

active

050692500

ABSTRACT:
A rotary valve for power steering apparatus includes an input shaft, an output shaft disposed in axial alignment with the input shaft and connected thereto by a torsion bar, a valve rotor formed on the input shaft, and a valve sleeve connected to the output shaft and fitted over the valve rotor. A return oil path in the input shaft is formed inside a step defined in the internal surface of the valve sleeve while a return oil path in the valve sleeve is formed in a cylindrical portion of an increased internal diameter and extends therefrom along the step to define a return flow groove.

REFERENCES:
patent: 4381799 (1983-05-01), Sato
patent: 4561516 (1985-12-01), Bishop et al.
patent: 4699174 (1987-10-01), Bishop

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