Importance

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Abstract

A wheelchair includes two side frames (1L and 1R) consisting of respective lower frame parts (1'L and 1'R) and respective upper frame parts (1'L and 1'R). Each side frame has transverse, horizontal, tilt pivot axis (3) between its upper and lower parts. Forwards of each axis (3) is a tilt adjustment device (4) acting between the lower frame part and the upper frame part. Each device (4) may take the form of a gas spring, an electric motor or a screw device. The lower frame parts (1'L and 1'R) are linked by a pair of shear braces (5L and 5R) with a vertical pivot axis (6) in the center. The upper frame parts (1'L and 1'R) are linked by one or more pairs of transverse braces (8L and 8R) with a pivot axis (9) in the center. Seat plates are fixedly mounted at the top surfaces of the respective braces (8L and 8R). The seat plates can form the whole or part of the seat, or can be the basis for other seating elements, such as cushions and seat shells. A sling-form backrest is provided between the upper frame parts. When the tilt adjustment device (4) is operated, the upper frame parts and thus the seat and the backrest turn around the pivot axles (3) and give a desired tilt position. Independently of the tilt position, the wheelchair can be folded. This folding wheelchair has the advantage of having an occupant-operable tilt adjustment and is particularly advantageous in that the occupant can operate the tilt adjustment while seated in the wheelchair.

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