Transmission range selector valve

Details Transmission range selector valve Transmission range selector valve

1986-12-18

1988-05-10

Wright, Dirk

Machine element or mechanism

Gearing

In series plural interchangeably locked nonplanetary units

74335, 192 357, 192109F, B60K 2010, B60K 2012, B60K 2014

Patent

active

047427310

ABSTRACT:
A transmission includes a range selector valve that eliminates the possibility of unintentional simultaneous multiple gear engagement by a fail safe arrangement of fluid flow paths and valving. A pair of parallel paths connect to clutches that operate a high-low power shift transmission and a multiple speed power shift main transmission. The fluid flow path to the multiple speed power shift main transmission clutches is valved to select either a first or second group of speed/direction settings. Each of these groups then includes at least one valve to select a particular transmission speed or direction setting.

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patent: 3990553 (1976-11-01), Holzinger et al.
patent: 4046160 (1977-09-01), Horsch
patent: 4135610 (1979-01-01), Chatterjea
patent: 4138004 (1979-02-01), Horsch

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