Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-06-03
1992-04-07
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74856, 192 358, 192 362, B60K 4108
Patent
active
051016885
ABSTRACT:
In a transmission system having range shift levers mechanically linked to couplers and shiftable between first and second positions to select ranges of gears and electro-hydraulic powershift clutches for selecting a gear within the range selected by the range shift lever, the powershift clutches are located on each side of at least one of the couplers, between the input shaft and the coupler and between the output shaft and the coupler. A dump solenoid is controlled by operation of a clutch pedal to release fluid from the powershift clutches as the clutch pedal is depressed but before it reaches the fully depressed position so that the coupler is not being driven when coupler shifting takes place. A microprocessor is responsive to shifting of the range shift levers to control energization of the powershift clutches so that when one or more of the shift levers is shifted the lowest powershift gear is selected if the new lever positions will produced a higher gear range and the highest powershift gear is selected if the new lever positions select a lower gear range.
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Versatile Model 936/976 Tractor Operators Manual, Ford New Holland, 1987.
4-Wheel-Drive Tractors from John Deere "Break New Ground-Shatter Old Limits".
Beim Rudolf
Pearce Shairyl I.
Rutkowski David J.
Tanzer John H.
Braun Leslie A.
Ford New Holland Inc.
Trousdell William O.
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