Four wheel drive working vehicle having transmission clutches se

Details Four wheel drive working vehicle having transmission clutches se Four wheel drive working vehicle having transmission clutches se

1992-06-05

1994-08-30

Focarino, Margaret A.

Motor vehicles

Having four wheels driven

Including separate mechanical assemblies for transmitting...

180248, 180249, 74650, B60K 17354

Patent

active

053418930

ABSTRACT:
A four wheel drive working vehicle having transmission clutches separately operable for driving right and left rear wheels. Power for driving right and left front wheels is transmitted thereto from a change speed device through a front differential, while power for driving the rear wheels is transmitted thereto from the change speed device through the transmission clutches, respectively. When the front wheels are steered from a straight running position beyond a predetermined angle in order to turn the vehicle, the transmission clutch corresponding to the rear wheel lying on the inside of the turn is disengaged while the transmission clutch corresponding to the outside rear wheel remains engaged. Consequently, the rear wheel lying on the inside of the turn and describing the smallest turning radius is placed in free rotation state. The working vehicle can change running directions and make small, sharp turns smoothly without a rear differential.

REFERENCES:
patent: 4723622 (1988-02-01), Toshikuni et al.
patent: 4792009 (1988-12-01), Iritani
patent: 4862988 (1989-09-01), Umemoto
patent: 4921065 (1990-05-01), Hamada et al.
patent: 4967868 (1990-11-01), Schwarz et al.
patent: 5058700 (1991-10-01), Shibahata
patent: 5119900 (1992-06-01), Watanabe et al.
patent: 5161636 (1992-11-01), Haupt et al.

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