A motorization device for a wheelchair may have a positioning arm adapted to be connected to a frame of the wheelchair by at least one lockable joint. A motor block may be operatively connected to the positioning arm by at least one other lockable joint, the motor block including at least a motor and an output roller operatively coupled to the motor, the output roller configured to contact a wheel of the wheelchair to impart torque to the wheel. The positioning arm and the motor block collaborate to provide the motor block with an engaged configuration in which the motor block is configured to biasingly contact a wheel of the wheelchair, and a disengaged configuration in which the motor block is separated from the wheel of the wheelchair.

This wheelchair propulsion and steering device enables wheelchair individuals with only one functional arm to drive a wheelchair. Further it enables two handed people stronger and better controlled use of a wheelchair.

A pump-action wheelchair includes one or more pumping arm(s). A driving wheel is arranged on each side of the wheelchair. The pumping arm(s) is/are connected to two driving mechanisms that are connected to driving axles for the driving wheels. A handle bar can be connected to the pumping arm. The handle bar can be lowered to permit an operator to more easily climb into the wheelchair and then raised into an operating position before performing the pumping action. Different forces can be applied by the driving mechanisms to the driving wheels in response to rotation of the handle bar to steer the wheelchair. A reverse mechanism can be provided to operate the wheel chair in reverse. A conversion kit can convert a conventional wheelchair into a pump-action wheelchair. Foot rests may be connected to the pumping arm to move forward and rearward in response to the pumping action.

In a power transmission mechanism 20, a line connecting a center shaft 21 of a reference gear member 40 and a first shaft 44 of a first planetary gear member 42 and a line connecting the center shaft 21 of the reference gear member 40 and a second shaft 47 of a second planetary gear member 45 form a specific angle ?. Rotation in one direction is prevented when a first carrier member 22 and a second carrier member 32 are relatively rotated in a direction to decrease the specific angle ?. Further, a rotation prevention release unit is provided to release a prevention state of the rotation when the first carrier member 22 and the second carrier member 32 are relatively rotated in a direction to increase the specific angle ?.

A motorized wheelchair for disabled or elderly users has a frame, a seat for the disabled driver, a handlebar, a motor provided with an acceleration apparatus, a wheel assembly and a braking apparatus of the wheels. The wheelchair has a dual-action control device that is capable of being interfaced with the acceleration apparatus of the motor and with the braking apparatus of the wheels.

This wheelchair propulsion and steering device enables wheelchair individuals with only one functional arm to drive a wheelchair. Further it enables two handed people stronger and better controlled use of a wheelchair.

An embodiment provides a wheelchair braking device, the wheelchair braking device including: at least two brake mechanisms, wherein, when the wheelchair braking device is engaged in a brake position on a wheelchair, at least one brake mechanism engages with a first of a plurality of wheels on the wheelchair and at least a second brake mechanism engages with a second of the plurality of wheels on the wheelchair; a connection component extending between the at least two brake mechanisms; and a brake handle connected to the connection component and causing movement of the at least two brake mechanisms simultaneously with respect to the plurality of wheels. Other aspects are described and claimed.

A wheelchair includes a seat, a backrest configured to couple to the seat, a pair of axle supports configured to couple to the seat where the pair of axle supports is configured to support an axle and a pair of rear wheels, a central hub configured to couple to the seat, a pair of caster supports configured to couple to the central hub where the pair of caster supports is configured to support a pair of front caster wheels, and a footrest configured to couple to the pair of caster supports.

An embodiment provides a wheelchair braking device, the wheelchair braking device including: at least two brake mechanisms, wherein, when the wheelchair braking device is engaged in a brake position on a wheelchair, at least one brake mechanism engages with a first of a plurality of wheels on the wheelchair and at least a second brake mechanism engages with a second of the plurality of wheels on the wheelchair; a connection component extending between the at least two brake mechanisms; and a brake handle connected to the connection component and causing movement of the at least two brake mechanisms simultaneously with respect to the plurality of wheels. Other aspects are described and claimed.

A brake system for use with a wheeled device, such as a wheeled person transportation device, such as a wheelchair. The brake system comprises a handle comprising a first portion and a second portion, wherein the first portion is moveably coupled to the second portion; a carrier comprising an internal cavity; a brake actuator for actuating a brake, the brake actuator being arranged within the internal cavity; brake actuator biasing means for applying a biasing force to the brake actuator for biasing the brake actuator to a brake-engaged position; and force-transfer means coupled to the first portion and to the brake actuator such that movement of the first portion towards the second portion causes the brake actuator to move along the internal cavity of the carrier against the biasing force to a brake-disengaged position.