Transmission range selector valve
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United States of America Patent
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-
May 10, 1988
Grant Date -
N/A
app pub date -
Dec 18, 1986
filing date -
Dec 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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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