B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
180/31, 74/92
B60K 17/35 (2006.01) B60K 17/348 (2006.01)
Patent
CA 1287236
Abstract of the Disclosure A four wheel drive vehicle with dirigible front wheels, comprising a main propelling drive trans- mission, and a front wheel drive transmission connected to the main transmission. The front wheel drive transmission is switchable between a first four wheel drive mode in which the front wheels and the rear wheels are driven at a substantially equal peripheral speed and a second four wheel drive mode in which the front wheels are driven at a higher peri- pheral speed than the rear wheels. The front wheel drive transmission includes a piston operable by a hydraulic control system including a control valve mechanically interlocked to a steering section of the vehicle for switching the front wheel drive trans- mission from the first drive mode to the second drive mode. The piston, which normally is biased toward a position for the first drive mode, is movable against the biasing force to a position for the second drive mode when the front wheels are steered to an angle exceeding a predetermined angle.
523140
Hirata Kazuo
Ishida Mikio
Ishiizumi Seiichi
Ishimori Shozo
Miki Hiroyuki
Kubota Ltd.
Marks & Clerk
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