Control valve for a continuously variable transmission

Details Control valve for a continuously variable transmission Control valve for a continuously variable transmission

1988-01-14

1989-06-13

Bui, Thuy M.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Fluid pressure actuator for adjustment of member

74867, 474 18, F16H 1102

Patent

active

048388360

ABSTRACT:
A control valve has ports and a spool which has lands and an annular groove between the lands. The land has a plurality of hollow portions at a circumferential edge portion adjacent the annular groove so as to gradually increase the opening area of one of the ports.

REFERENCES:
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4557706 (1985-12-01), Tanaka et al.

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