Rotary servovalve

Details Rotary servovalve Rotary servovalve

1982-03-19

1984-07-17

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

91375R, 91375A, F15B 1316

Patent

active

044600160

ABSTRACT:
A rotary servovalve for a power steering system is provided wherein a plurality of orifices are established by a plurality of axial extending lands formed on the internal surface of a valve sleeve and the circumferential surface of a rotor received therein. As the rotor rotates relative to the sleeves, the orifices control the pressure and the flow of fluid supplied from a pump to a power cylinder of the steering system and from the power cylinder to a reservoir. Each of the lands on the rotor is formed at each of its circumferential edges with a chamfer which has a third slope for preventing the generation of cavitation and hissing noise, in addition to first and second slopes for offering an optimum steering feeling to a vehicular driver.

REFERENCES:
patent: 3556155 (1971-01-01), Morris
patent: 3591136 (1971-07-01), Bishop
patent: 3772962 (1973-11-01), Suzuki

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