Foldable wheelchair and side frame assembly for foldable wheelchair
AssigneeEverest & Jennings International Ltd.
InventorsRichard Geiger, A. Scott Robertson, Neville Page
Life of this patent
Estimating the term…
Abstract
A foldable wheelchair has a folding mechanism connecting two side frame assemblies to each other. The side frame assemblies each support a castor frame piece, pivoting shafts of the folding mechanism, drive wheel axles and a seat back tube. The side frame assemblies are made of two halves that are secured together and may be fabricated from compression or injection molded composite plastics. The seat angle is adjusted by pivoting the side frame assemblies around a pivot point located in an upward and forward region of the side frame assembly.
Claims19
A wheelchair side frame assembly comprising:
- a side frame piece;
- a caster frame piece;
- mounting means located at a forward region of the side frame piece for pivotally mounting the caster frame piece at a pivot point on the side frame piece to permit relative pivoting movement between the side frame piece and the caster frame piece about said pivot point;
- a plurality of spaced apart discretely defined mounting positions located at a rearward region of the side frame piece for mounting a drive wheel, said spaced apart discretely defined mounting positions being disposed along an arc of a circle having a center of curvature coincident with said pivot point.
A wheelchair frame comprising:
- a pair of side frame assemblies, each of said side frame assemblies comprising a side frame piece and a caster frame piece, a forward region of each side frame piece including mounting means for pivotally mounting a respective one of the caster frame pieces at a pivot point on the side frame piece to permit relative pivoting movement between each side frame piece and the respective caster frame piece about said pivot point, a rearward region of each side frame piece including a plurality of spaced apart discretely defined mounting positions for mounting a drive wheel on each side frame piece, the spaced apart discretely defined mounting positions on each respective side frame piece being disposed along an arc of a circle having a center of curvature coincident with said pivot point on the respective side frame piece;
- a seat assembly extending between said pair of side frame assemblies;
- and
- a connecting frame piece for connecting said side frame assemblies to one another.
Dependencies are inferred from the claim text.