Rotary control valve of power steering system and method of prod

Details Rotary control valve of power steering system and method of prod Rotary control valve of power steering system and method of prod

1983-12-27

1986-11-25

Schwadron, Martin P.

Fluid handling

Systems

Multi-way valve unit

1376253, 91375A, F16K 1112, B62D 5083, F15B 910

Patent

active

046242830

ABSTRACT:
A rotary control valve for an automotive power steering system and a method for making such a valve. The valve includes a tubular valve body and a spool valve member rotatable within the valve body, each of the valve body and spool valve having axially extending grooves. The spool valve member includes control edges formed at the axial grooves to effect control of the area of an opening defined by the edges of the axial grooves of the spool member and the axial grooves of the valve body. The control edges extend parallel to the axial grooves of the spool valve member along substantially the entire length thereof and are defined by at least one arcuate surface portion formed on the spool valve member at axially extending edges of the grooves. The arcuate surface portion has an axis that extends parallel to the axial grooves of the spool valve member.

REFERENCES:
patent: 2586755 (1952-02-01), Wilson
patent: 2683431 (1954-07-01), Morse
patent: 4290452 (1981-09-01), Takahashi et al.
patent: 4452274 (1984-06-01), Haga et al.

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