Four wheel drive system

Details Four wheel drive system Four wheel drive system

2006-08-28

2009-10-06

Winner, Tony H. (Department: 3611)

Motor vehicles

Steering by driving

Independently operable drive motors

C180S252000, C180S006280, C180S006440

Reexamination Certificate

active

07597160

ABSTRACT:
A four wheel drive system for bilaterally symmetric vehicles is characterized by separate drive systems for the front and rear wheels. Each drive system is operable to independently drive each wheel. The rear wheels of the vehicle are steering wheels which are connected with the vehicle frame for independent rotation about a vertical axis. Steering and driving of the wheels is controlled by a controller. The combination of independent steering for the rear wheels and independent powering of all four wheels provides the vehicle with a zero turning radius for improved mobility as well as improved traction on unstable surfaces.

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