Pressure medium control system for auxiliary power steering syst

Details Pressure medium control system for auxiliary power steering syst Pressure medium control system for auxiliary power steering syst

1978-10-12

1981-08-25

Cohen, Irwin C.

Fluid handling

Systems

Multi-way valve unit

91 31, 91467, 13762524, 1376253, 13762532, F15B 1304, F16K 1102

Patent

active

042853664

ABSTRACT:
Precise control over outlet pressure as a function of valve position is obtained for operation of a servomotor by a rotary plug valve journaled at opposite ends in a control bushing having conduit channels in fluid communication with passage grooves in the plug valve to form a plurality of parallel flow paths between a pressure inlet and two directional outlets to the servomotor. The edge formed on the plug valve by a passage groove in only one of the parallel flow paths to each of the outlets is beveled to improve valve control precision.

REFERENCES:
patent: 371063 (1887-10-01), Hays
patent: 817158 (1906-04-01), Barr
patent: 1354580 (1920-10-01), Schumacher
patent: 2612184 (1952-09-01), Evans
patent: 2946348 (1960-07-01), North
patent: 3027918 (1962-04-01), Robra
patent: 3094173 (1963-06-01), Hausmann et al.
patent: 3138175 (1964-06-01), Chilcoat
patent: 3296940 (1967-01-01), Eddy et al.
patent: 3468341 (1969-09-01), Newcomb et al.
patent: 4063490 (1977-12-01), Duffy

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