Disclosed are provisions for enabling a user of a wheelchair to rapidly outfit a first side of the wheelchair with a first implement or a second implement, both implements having adaptive functionalities, and also for enabling the user to perform the same in conjunction with a second side of the wheelchair. Useful implements include those having: A.) ground-contacting functionalities, such as improving navigation over rough terrain and adding forward stability to the wheelchair, and B.) non-ground-contacting elevated functionalities, including holding an umbrella, carrying an electronic device, or supporting a tray, work surface, or other auxiliary load.

An adjustable wheelchair includes a base frame having a first guide portion defining a first arcuate channel, and a seat frame having a second guide portion defining a second arcuate channel confronting the first arcuate channel. A first bearing assembly is secured to a front end of the first arcuate channel and extends into bearing engagement with the second arcuate channel. A rear bearing assembly is secured to a rear end of the second arcuate channel and extends into bearing engagement with the first arcuate channel. The seat frame is slideable in an arcuate path defined by the first and second arcuate channels for adjustment of a tilt angle of the seat frame with respect to the base frame.

The invention relates to an adaptive attachment wheel for wheelchairs, formed as a unit consisting of: a wheel (5); frame segments (1); adaptation shells (7, 8) for lateral guidance on the wheelchair front tubes; and at least one holding element (6) that can be fastened to the wheelchair; such that, when the adaptive attachment wheel is attached to the wheel-chair, the adaptation shells (7, 8) are brought together with the wheelchair front tubes, the front casters of which are lifted off of the ground, and a three-wheeled wheelchair is produced, the front wheel (5) of which can be steered and braked by means of an one-hand steering system (13).

A kit of parts which when assembled will provide a wheeled chair and include a central frame member to which all other elements are connected.

An adjustable wheelchair includes a base frame having a first guide portion defining a first arcuate channel, and a seat frame having a second guide portion defining a second arcuate channel confronting the first arcuate channel. A first bearing assembly is secured to a front end of the first arcuate channel and extends into bearing engagement with the second arcuate channel. A rear bearing assembly is secured to a rear end of the second arcuate channel and extends into bearing engagement with the first arcuate channel. The seat frame is slideable in an arcuate path defined by the first and second arcuate channels for adjustment of a tilt angle of the seat frame with respect to the base frame.

Methods are disclosed, according to the present invention, which enable reversible reconfiguration of a wheelchair by a user between a.) an original load-bearing configuration utilizing the conventional caster wheels of the wheelchair, and b.) a modified load-bearing configuration which confers improved functionality to the wheelchair, especially for traversing difficult or uneven terrain.

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).

A wheelchair (100) includes a chassis (101) defining a seat (102), a backrest (103), one or more armrests (104,105), and an undercarriage (106). One or more front caster wheels (118,119) are coupled to, and selectively detachable from, the undercarriage. One or more rear wheel assemblies (120,121) each include a rear wheel (125), an axle (127), and a mounting post (129) extending distally from the axle at a substantially orthogonal angle relative to the axle. One or more quick release devices (130,131) couple each mounting post of each rear wheel assembly to the undercarriage such that the each the one or more rear wheel assemblies is selectively detachable from the undercarriage.

The present invention relates to an indoor and outdoor mobility system 1 forming a mobility device 10 for people with walking disability, the system comprising a base 20 two indoor front wheels 30, which can be attached to the base 20; two outdoor front wheels 40, which can be removably attached to the base 20, wherein the outdoor front wheels 40, when attached to the base 20 comprise a wider track width compared to the indoor wheels 30; indoor back wheels 52 which can be attached to the base 20; and outdoor back wheels 62 which can be removably attached to the base 20, wherein the outdoor back wheels 62, when attached to the base 20 comprise a wider track width compared to the indoor back wheels 30. The invention further comprises a method for the change of a mobility device for people with walking disability from an indoor to an outdoor use.

Means for reconfiguring a wheelchair are disclosed wherein a user or an occupant of the wheelchair is enabled to repeatably alternate the wheelchair between an original load-bearing configuration and a modified load-bearing configuration by engaging and disengaging a ground-contacting adaptive implement operatively connected to a load transitioning mechanism, said load transitioning mechanism adapted for connection to a forward portion of the wheelchair. Embodiments according to the present invention enable an occupant of the wheelchair to alternate the wheelchair, through a cyclic operation sequence, between the original configuration and the modified configuration by toggling of a manipulable switch and subsequent momentary reclining of the wheelchair. The user willfully effectuates a change in the angular disposition of the ground-contacting adaptive implement relative to the wheelchair about a substantially horizontal joint axis wherein in the modified configuration a deployed angular orientation is maintained under load-bearing conditions during travel of the wheelchair in all directions. Embodiments of the present invention enable wheelchair reconfiguration with simplicity of operation while ensuring rigid attachment of a ground-contacting adaptive implement to the wheelchair to confer special functionalities to the wheelchair while preserving comfort and safety for the user while the wheelchair is in the modified load-bearing configuration.