Bi-directional anti-tip system for powered wheelchairs

Details Bi-directional anti-tip system for powered wheelchairs Bi-directional anti-tip system for powered wheelchairs

2007-09-04

2007-09-04

Dickson, Paul N. (Department: 3616)

Land vehicles

Wheeled

Attachment

C180S065100, C180S907000

Reexamination Certificate

active

11080292

ABSTRACT:
A bi-directional anti-tip system for a wheelchair includes a pair of anti-tip system subassemblies actively lifting a leading anti-tip wheel when traveling in either forward or reverse directions. The anti-tip system subassemblies operate to couple a leading anti-tip wheel to the drive assembly such that pivot motion thereof effects vertical displacement of the leading anti-tip wheel and to decouple a trailing anti-tip wheel from the drive assembly to null pivot motion inputs therefrom. In one embodiment, rheonetic links actively couple and decouple the anti-tip system subassemblies. The system may also include compliant bearings or extensible links for inward displacement of the anti-tip wheel upon impact with a curb.

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