Abstract: A front wheel support for a wheel chair, the front wheel support having a curved tube for attachment to a frame member of the wheel chair and a curved part. The curved part has a first portion with a curvature identical to the curvature of the curved tube, and a cross section allowing the first portion of the curved part to fit inside the curved tube. The curved part further has a second portion with a wheel fork seat for mounting a front wheel fork of the wheel chair.

Abstract: Front wheel support for a wheel chair, said front wheel support comprising a curved tube for being attached to a frame member of the wheel chair and a curved part. The curved part has a first portion with a curvature being identical to the curvature of the curved tube, and a cross section allowing the first portion of the curved part to fit inside the curved tube. The curved part further comprises a second portion with a wheel fork seat for mounting a front wheel fork of said wheel chair.

Abstract: L-shaped frame member and frame for a wheelchair. The frame member comprises a first arm with a first cross section, a second arm with a second cross section, and a knee-shaped composite element. The first arm is connected to the second arm via the knee-shaped composite element. A firm connection between the first arm and the knee-shaped composite element and a solid connection between the second arm and the knee-shaped composite element being formed by portions of a mounting glue).

Abstract: The wheelchair (10) has a closed, three-dimensional frame (12). The latter is constituted by a front horizontal transverse support (12.1), two lateral supports (12.2, 12.3), which are arranged symmetrically in respect to the longitudinal center axis, and a rear, essentially horizontal transverse support (14). The lateral supports have the shape of a letter L with respectively an upright leg (12.2), which laterally adjoins the front transverse support (12.1), and with a rearward oriented longitudinal leg (12.3). A front wheel support (25), on which a front wheel (24) is mounted, is fastened on each upright leg (12.2) of the longitudinal supports.

Abstract: A collapsible wheelchair (10) with two lateral supports (12, 13) on which respectively a drive wheel (18, 19) and respectively a running wheel (20, 21) are fastened and which are rigidly connected by a main transverse support (34) and an auxiliary transverse support (32). The former is constituted by two legs (38, 39) connected a hinge joint, which can be arrested on each other by an arresting device. The latter has an arresting protrusion (56) hinged on one leg (38). The arresting protrusion runs up on the stop face (62) respectively located opposite it, which is a section of a stop area (64) formed on the other leg (39). At least one of the legs (38, 39) can be advanced in the direction toward the longitudinal center surface of the collapsible wheelchair (10) by an advancement device.

Abstract: By adjusting two telescoping-type interengaging shiftable parts for each of two frame bars (3,4) of a support frame (2) of a lightweight wheelchair (1), the sitting position of the same can be adjusted with respect to the seat surface (5) and with it the adjustment of the center of gravity can be dynamically adjusted with respect to the user. Additional adjustment possibilities by means of each support element (17) at the right and left sides of the seat surface (5) with respect to the rear axle as well as corresponding clamping devices for the front wheels (9,10) on the frame (2) allow a very precise user-compatibility in this lightweight wheel chair. Additionally a backrest (6) can be collapsed with respect to the seat surface (5) by means of handles (20) pivotally connected with the frame bars, to thereby permit the lightweight wheelchair (1) to be compactly folded up for transportation purposes.