Climbing and descending vehicle

Details Climbing and descending vehicle Climbing and descending vehicle

A - Human Necessities

61

G

280/8

A61G 5/06 (2006.01) B62B 9/06 (2006.01) B62D 57/00 (2006.01) B62D 57/02 (2006.01) A61G 5/10 (2006.01)

Patent

CA 1275296

ABSTRACT OF THE DISCLOSURE A stair-climbing and descending vehicle is disclosed, comprising a frame and a pair of transverse, co-axial, power- drive axles, each rotatably carrying a spider assembly at its outer end. Each spider has at least three wheels, one at each equi-spaced extremity of its radial arms. Each axle drives either the spider or the associated wheels through a differential gearing. When climbing a stairway, the spiders are rotated immediately when the wheels are prevented from rotating by encountering a stair riser. The differential also serves to safely and smoothly descend the stairs. The vehicle is adapted for use as a wheelchair, in which case a chair-shifting device is provided to shift the center of gravity of the vehicle, rearwardly.

536338

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