Folding wheelchair

Details Folding wheelchair Folding wheelchair

1981-12-15

1983-11-15

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Extensible

297 45, 297DIG4, B62B 1100

Patent

active

044151772

ABSTRACT:
The invention is a folding wheelchair (10) having as its basic elements a frame (12), a folding backrest (48), a removable headrest (60), a set of rotatable foot pads (66), a set of rotatable arms (54), a set of four wheels (76), and a set of foldable handles (84) carried on a pair of slidable and recessing arms (82). The wheelchair is rendered foldable via a spider mechanism (90) comprising a body (92) and four leg elements (94). The end portions (96), (98) of the leg elements (94) are pivotally secured to the frame (12). Folding and unfolding of the chair is carried out by use of a handle (114) which rotates a set of cams (118). When the handle is in the horizontal or "lock" position, the central portions (108) of the leg elements (94) are locked in the wheelchair "unfolded" condition. When the handle is in the vertical or "unlock" position, the leg elements (94) are free to slide along a set of guide slots (116), permitting the wheelchair to be folded.

REFERENCES:
patent: 1626507 (1927-04-01), Camper
patent: 2629607 (1953-02-01), Roubeck
patent: 2639162 (1953-02-01), Schon
patent: 3142351 (1964-07-01), Green
patent: 3228724 (1966-01-01), Resar
patent: 3666292 (1972-05-01), Bartos
patent: 4025088 (1977-05-01), Rothschild
patent: 4076304 (1978-02-01), Deucher
patent: 4164354 (1979-08-01), Rodaway
patent: 4170368 (1979-10-01), Southward et al.
patent: 4266305 (1981-05-01), Kavaloski et al.
patent: 4273350 (1981-06-01), Williams
patent: 4323133 (1982-04-01), Williams

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