Fluid biased transmission range valve

Details Fluid biased transmission range valve Fluid biased transmission range valve

1997-12-29

1999-05-04

Wright, Dirk

Machine element or mechanism

Gearing

In series plural interchangeably locked nonplanetary units

74335, F16H 5908

Patent

active

058991212

ABSTRACT:
A transmission range valve replaces a traditional spring bias with a pressurized fluid bias to prevent an unintended range change in the event of a significant fluid pressure decrease or loss. Because pressurized fluid is used both for biasing the range valve and for shifting the range valve to effect an auxiliary section range change, a pressure drop or loss of supply pressure will not result in a change of state of the range valve as may occur with prior art spring biased valves.

REFERENCES:
patent: 3229551 (1966-01-01), Stuckey
patent: 4275612 (1981-06-01), Silvester
patent: 4445393 (1984-05-01), Braun
patent: 4450869 (1984-05-01), Acker
patent: 4555959 (1985-12-01), Braun
patent: 4584895 (1986-04-01), Holmes
patent: 4722237 (1988-02-01), McNinch, Jr.
patent: 4788875 (1988-12-01), Genise
patent: 4793378 (1988-12-01), Loeffler et al.
patent: 4974474 (1990-12-01), Newbigging
patent: 5092187 (1992-03-01), Irwin
patent: 5144863 (1992-09-01), Wood
patent: 5199312 (1993-04-01), Huggins et al.
patent: 5218878 (1993-06-01), Monette et al.
patent: 5528949 (1996-06-01), Stainton et al.
patent: 5669265 (1997-09-01), Adler

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