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.

Abstract: A wheelchair for the disabled and sick in which two rear wheels (1) are each connected to an electric motor drive disposed on the rear axle (2) of each rear wheel (1) and each rear wheel is individually spring mounted in relation to the underframe (5) of the wheelchair by a spring member (6) which is coupled to the underframe (5) and the drive (3). A rocker identically configured for use on the right and left is mounted with its front end in a horizontal axis (8) on a longitudinal bar (9) of the underframe so as to be pivotable with respect to height, and with its rear longitudinal end the rocker is supported on the underframe longitudinal bar (9) and the spring member (6) coupled to the rocker (7). Drive (3 or 4) is attached to the rocker (7). Between the two rockers is a free space (FR) extending from the rear side of the wheelchair to the pivoting axes (8) of the rocker for easy insertion of a battery at the center of gravity.