Abstract: A wheel assembly comprising a wheelchair wheel (5) and a backstop arrangement (10; 30; 70) configured to selectively engage and disengage a backstop function and comprising a backstop selector (15; 35; 75) and a backstop member (18; 38; 78), wherein the wheel (5) comprises an internal-gear wheel hub (11; 31; 71) comprising a number of internal gears (57, 58) and having an inner rotatable circumferential surface (13; 33; 73), and wherein the backstop member is configured to allow the inner circumferential surface to rotate in one direction and to prevent rotation in the opposite direction. The wheel assembly comprises further a gear-shift arrangement comprising a shift member (54), which is axially moveable within the internal-gear hub (31) to engage a specific gear of said number of internal gears (57, 58), and wherein the shift member (54) via a connector member (55) is operatively connected to the backstop selector.

Abstract: A wheel assembly comprising a wheelchair wheel (5) and a backstop arrangement (10; 30; 70) configured to selectively engage and disengage a backstop function and comprising a backstop selector (15; 35; 75) and a backstop member (18; 38; 78), wherein the wheel (5) comprises an internal-gear wheel hub (11; 31; 71) comprising a number of internal gears (57, 58) and having an inner rotatable circumferential surface (13; 33; 73), and wherein the backstop member is configured to allow the inner circumferential surface to rotate in one direction and to prevent rotation in the opposite direction. The wheel assembly comprises further a gear-shift arrangement comprising a shift member (54), which is axially moveable within the internal-gear hub (31) to engage a specific gear of said number of internal gears (57, 58), and wherein the shift member (54) via a connector member (55) is operatively connected to the backstop selector.

Abstract: A wheel assembly comprising a wheel (5) for a wheelchair (1), a gripping ring (6) connected to the wheel, and a gear-shift arrangement (7; 10; 40; 70); the wheel being provided with a wheel axle (17; 47; 77); the gear-shift arrangement being configured to change a gear ratio between the wheel and the gripping ring; the gear-shift arrangement comprising an internal-gear hub (8; 16; 46; 76) comprising a number of internal gears (18, 18?, 18?; 48, 48?, 48?; 78, 78?, 78?), a shift member (15; 45; 75), and a gear selector (9; 11; 41; 71) located on the same side of the wheel as the gripping ring, wherein the gear selector is operatively connected to the shift member (15; 45; 75) that is axially moveable within the internal-gear hub to engage a specific gear of said number of internal gears, and that the gear selector has an inner base portion (12; 42; 72) and an outer handle portion (13; 43; 73) and extends radially away from the wheel axle.

Abstract: Embodiments herein relate to a wheelchair gearshift arrangement (10), which comprises an axle tube (20) and a pair of wheel attachment adaptors (30) inserted into a respective end (21, 22) of the axle tube (20). The wheel attachment adaptors (30) further includes a respective axle sleeve (40) adapted to receive and hold a respective wheel axle (51) of a respective complete wheelchair wheel (50). Each complete wheelchair wheel (50) having a respective wheel axle centric, axially translatable, gear change mechanism (52). One or more gear change actuators (80) are arranged within the axle tube (20) such that they are operative to selectively, upon user manipulation of an associated gear selector (60), axially translate the associated gear change mechanisms (52) of the respective complete wheelchair wheels (50). Such translation will affect a change of gear ratio between a push-rim (55) and wheel-rim (56) of each respective complete wheelchair wheel (50).

Abstract: A wheel assembly comprising a wheel (5) for a wheelchair (1), a gripping ring (6) connected to the wheel, and a gear-shift arrangement (7; 10; 40; 70); the wheel being provided with a wheel axle (17; 47; 77); the gear-shift arrangement being configured to change a gear ratio between the wheel and the gripping ring; the gear-shift arrangement comprising an internal-gear hub (8; 16; 46; 76) comprising a number of internal gears (18, 18?, 18?; 48, 48?, 48?; 78, 78?, 78?), a shift member (15; 45; 75), and a gear selector (9; 11; 41; 71) located on the same side of the wheel as the gripping ring, wherein the gear selector is operatively connected to the shift member (15; 45; 75) that is axially moveable within the internal-gear hub to engage a specific gear of said number of internal gears, and that the gear selector has an inner base portion (12; 42; 72) and an outer handle portion (13; 43; 73) and extends radially away from the wheel axle.

Abstract: The present invention relates to a wheelchair wheel attachment and gear change adaptor unit for a geared wheelchair wheel having a hub which comprises an attachment shaft protruding to one side thereof, and where gear change is actuated by axial manipulation of a rod running within the shaft in a cylindrical bore which is concentric with the shaft. An adaptor housing (1) is designed to receive and support the shaft in an opening (19). Locking means are provided for releasably locking the shaft to the adaptor housing (1) such that the shaft cannot move out from the adaptor housing (1) until the locking means are released. A gear shift plunger (5) is arranged for hydraulic activation within the adaptor housing (1) such as to, upon activation when the wheelchair wheel is attached to the adaptor unit, push the rod outwards of the adaptor housing (1) towards the hub for effecting gear change in the hub.

Abstract: A gear shift pertaining to a hub of a wheel with a quick lock. The hub has a gear which is supported round a shaft with an outer end and an inner end. The inner end of the shaft is suspended via a suspension device on a vehicle. The quick lock includes a rod which runs in a cylindrical hole which is concentric within and with the shaft and a catch which locks the wheel with the shaft to the suspension device. The gear shift includes the shaft, the rod and a control, all so adapted that the rod has a neutral position relative to the shaft and wherein a movement, relative to the shaft, of the rod from the neutral position in a direction from the outer end of the shaft towards the inner end of the shaft disengages the catch so that the wheel together with the shaft can be locked to and released from the suspension device.

Abstract: A gear shift pertaining to a hub of a wheel with a quick lock. The hub has a gear which is supported round a shaft with an outer end and an inner end. The inner end of the shaft is suspended via a suspension device on a vehicle. The quick lock includes a rod which runs in a cylindrical hole which is concentric within and with the shaft and a catch which locks the wheel with the shaft to the suspension device. The gear shift includes the shaft, the rod and a control, all so adapted that the rod has a neutral position relative to the shaft and wherein a movement, relative to the shaft, of the rod from the neutral position in a direction from the outer end of the shaft towards the inner end of the shaft disengages the catch so that the wheel together with the shaft can be locked to and released from the suspension device.