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US Patent: 4,175,638
Electronically Controlled Four-Wheel Steering
Patentee:
Robert F. Christensen (exact or similar names) - Racine, Racine County, WI

USPTO Classifications:
180/403, 180/415

Tool Categories:
transportation : motor vehicles : steering apparatus

Assignees:
J. I. Case Threshing Machine Co. - Racine, Racine County, WI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 04, 1978
Granted: Nov. 27, 1979

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for J. I. Case & Co.
Description:
Abstract:

A control mechanism for a steering system for individually or simultaneously controlling the turning movements of the front and rear wheels of a vehicle is disclosed herein. The steering system is capable of controlling the movement of the rear wheels in a plurality of modes with respect to the front wheels and one mode in which the rear wheels are independently controlled. The control mechanism includes a control member that is pivoted on the frame of the vehicle to a plurality of positions to move an actuating switch that is part of the control means to a plurality of positions corresponding to the respective modes of steering and actuating means that cooperates with a signal producing device that produces a control signal to independently control the turning movement of the rear wheels.

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