Portable folding wheelchair

Details Portable folding wheelchair Portable folding wheelchair

2005-01-18

2005-01-18

Ellis, Christopher P. (Department: 3618)

Land vehicles

Wheeled

Extensible

C280S647000, C280S650000, C280S657000, C280S250100, C297S016100, C297SDIG004

Reexamination Certificate

active

06843500

ABSTRACT:
A portable folding wheelchair includes a front U-shaped tube and a rear U-shaped tube pivotally coupling with each other through a pin to form a X-shape. The front U-shaped tube has an upper end on two sides to fasten to a connection plate. The connection plate connects to a backrest. The front U-shaped tube has a lower section on two sides to pivotally engage with an upright tube. The upright tube and the rear U-shaped tube have an upper end bridging a sleeve. The wheelchair has a simple structure and may be folded in forward, rearward, upward and downward directions to become a smaller size to facilitate carrying or storing in a car to enable disabled people to use in travels and trips.

REFERENCES:
patent: 2685325 (1954-08-01), Webster
patent: 2781225 (1957-02-01), Heideman
patent: 3248125 (1966-04-01), Gill
patent: 3336039 (1967-08-01), Chute et al.
patent: 3704025 (1972-11-01), Cerveny et al.
patent: 4542915 (1985-09-01), Wheeler et al.
patent: 4907818 (1990-03-01), Chai
patent: 5388853 (1995-02-01), Lauro
patent: 6331013 (2001-12-01), Choi et al.
patent: 6776433 (2004-08-01), Harrison et al.

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