B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
180/54, 104/32.1
B62D 7/06 (2006.01)
Patent
CA 1170191
-45- ABSTRACT A VEHICLE HAVING WORM AND WORM-GEAR STEERING A vehicle having four-wheel steering has four wheels each pivotally mounted about a generally vertical axis for steering movement, a worm-gear respectively being mounted on the shaft supporting the wheel assembly, each worm-gear having a worm respectively associated therewith, two worms being provided on each of two worm-shafts respectively, a chain passing round sprockets provided on the shafts and round a sprocket mounted on a steering column, each worm-gear comprising a gear segment mounted on the associated shaft so that its centre of curvature is offset from the shaft axis for producing a differential rate of rotation of the worm-gear shaft with respect to rotation of the worm shaft, the arrangement being such that the inside wheels on turning a corner move through a greater angle than the outside wheels, to ensure proper tracking; the vehicle described may be in the form of a multi- purpose vehicle having four wheel drive and steering, suitable for use inter alia as a tractor or may have a steering arrange- ment to effect steering of one pair of wheels only.
388286
Ridout & Maybee Llp
Spence William G.
LandOfFree
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