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US 5,028,065 AGranted
Wheelchair
OwnerBenno Daneckerinventor
Life of this patent
Estimating the term…
Abstract
In order to produce a much simpler and in particular lighter-weight wheel-chair than existing models, and to achieve at the same time optimum rigidity and safety, the surface of the seat (3), back support (1) and side-walls (5) are designed as a self-supporting monocoque construction, in self-reinforced and/or foam plastic. The base (25) carried by the wheels (17,37) also consists of self-reinforcing and/or foam plastic. The monocoque construction and base are integrally formed and have a height adjustment feature.
Claims17
A wheelchair comprising:
- a plastic carrying structure having a seat portion, a rearward backrest portion, a forward footrest portion, and two side board portions formed in a unitary shell design;
- a plastic substructure supporting said unitary carrying structure wherein said carrying structure and said substructure are made as one piece;
- solid foamed plastic wheel bodies rotatably connected to and supporting said substructure, each of said wheel bodies having an integrally formed solid foamed plastic rolling surface, wherein at least one pair of said wheel bodies is disposed on opposite sides of said substructure, each of said pair of wheel bodies having an integrally formed solid foamed plastic handrail;
- and
- a height adjustment means for lowering and raising said footrest portion of said carrying structure while maintaining a preset distance between said footrest portion and said seat portion.
2 more elements
A wheelchair, comprising
- a unitary chair body formed of selected plastics material sufficient to support a person, said chair body including a backrest portion, a seat portion, and a footrest portion integrally connected to one another in that order,
- said footrest portion being rigidly fixed at a position below said seat portion to thereby establish a fixed dimension therebetween;
- wheel means coupled to said chair body to support said chair body for rolling movements over a surface wherein said wheel means includes a pair of plastic wheel bodies rotatably coupled to said chair body and having axles that are mounted in fixed relation to the chair body on opposite sides thereof, the wheel bodies adapted to being manually rotated by a person occupying the chair body to rollingly propel the chair body across the surface;
- height adjustment means operatively associated with said chair body to allow said chair body to be adjustably raised and lowered so that said footrest portion respectively moves between higher and lower positions relative to the surface while maintaining said fixed dimension between said footrest portion and said seat portion, wherein said footrest portion is closely adjacent to the surface when in said lower position thereof as compared to said higher position.
1 more element
Dependencies are inferred from the claim text.