Transmission shift valves with latching control

Details Transmission shift valves with latching control Transmission shift valves with latching control

1998-06-09

1999-08-10

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91426, 13759616, 192 871, 192 8714, F15B 13043, F15B 1307

Patent

active

059343222

ABSTRACT:
A power transmission has a plurality of shift valves each of which has an engaged position and a disengaged position. Each shift valve has a pair of chambers which is selectively pressurized by a latching valve to maintain the shift valves in their respective selected positions. During a ratio change, the latching valve discontinues pressure at the respective shift valve chambers to permit the appropriate shift valve movement.

REFERENCES:
patent: 4617968 (1986-10-01), Hendrixon
patent: 4848404 (1989-07-01), Hickok
patent: 5564543 (1996-10-01), Wilson

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