A brake assembly has a wheel body, a first stopping device, and a second stopping device. The wheel body has a central axle and two engaging portions formed respectively on two ends of the central axle. The first stopping device is connected with the engaging portions of the wheel body and has a resilient member and a magnetic unit. The resilient member is C-shaped and has a lateral rod and an inclined rod connected integrally with an end of the lateral rod. The magnetic unit is mounted on the lateral rod of the resilient member and has a sleeve having a bottom opening and a magnetic element mounted in the sleeve and selectively abutting the wheel body. The second stopping device is connected securely with the lateral rod of the resilient member and is engaged selectively with the engaging portions of the wheel body.

A wheelchair wheel lock system for a wheelchair having a wheel lock plate with a locking face. The system includes a control cable, a lock-pin, a remote actuator and a biasing member. The control cable operatively connects the lock-pin with the remote actuator. The lock-pin is positioned proximate the locking face and selectively engages and disengages with the locking face when urged by the actuator. The biasing member urges the lock-pin to disengage from the locking face.

A transport chair is provided that includes a base frame, a seat assembly pivotally mounted to the base, and a footrest assembly pivotally mounted to the base frame, the footrest assembly being associated with the seat assembly so as to pivot in unison with the seat assembly until the seat assembly is pivoted forward to an extent at which the footrest assembly contacts the floor or ground, at which point the footrest assembly does not pivot further upon further forward pivoting of the seat assembly. Further embodiments of the transport chair allow the seat assembly to recline, alone or in unison with a leg rest assembly, while the footrest remains in position.

A motorized accessory for a wheelchair includes a housing having a top end and a bottom end, a handlebar assembly secured to the top end of the housing, and a wheel assembly coupled to the lower end of the housing. The motorized accessory also includes an electric motor coupled to the wheel assembly that is configured to drive the wheel assembly. In addition, the motorized accessory includes a tow bar assembly having a proximal end coupled to the housing and extending outward to a free distal end, where the free distal end is configured to be removably coupled to the wheelchair. The motorized accessory is configured to latch to the manually driven wheelchair in order to convert the manually driven wheelchair into a motorized wheelchair.

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 smart brake system for safety at movement on a slope, includes: a multi-brake which comprises a deceleration brake for working while moving on a descending slope and a ratchet brake for working while moving on an ascending slope; a brake controller which selectively controls one of the deceleration brake and the ratchet brake to work as buoyancy of fluid is varied depending on the movement on the descending or the ascending slope.

The presently disclosure describes a motion assistance system for a wheelchair, for example, a powered drive wheel system that can continually drive a wheelchair in a circular or elliptical path. The motion assistance system comprises a mounting mechanism attachable to one or more structural elements of the wheelchair, and a drive linkage pivotable with respect to the mounting mechanism. A drive wheel can be mounted to an end of the drive linkage such that the drive wheel contacts the ground when installed on the wheelchair. The drive wheel comprises a plurality of lateral rollers positioned radially about the circumference of the power drive wheel. The lateral rollers can rotate about an axis tangential to the circumference of the drive wheel in order to facilitate driving the wheelchair in a radial direction.

A motorized accessory for a wheelchair includes a housing having a top end and a bottom end, a handlebar assembly secured to the top end of the housing, and a wheel assembly coupled to the lower end of the housing. The motorized accessory also includes an electric motor coupled to the wheel assembly that is configured to drive the wheel assembly. In addition, the motorized accessory includes a tow bar assembly having a proximal end coupled to the housing and extending outward to a free distal end, where the free distal end is configured to be removably coupled to the wheelchair. The motorized accessory is configured to latch to the manually driven wheelchair in order to convert the manually driven wheelchair into a motorized wheelchair.

This relates to a propulsion attachment for a manual wheelchair and methods of operation. The propulsion attachment can include three wheels, a motor, a gearbox, and a handlebar. The propulsion attachment can attach to the footrest of the wheelchair using a pin. The motor can be located in the rear side of the propulsion attachment and can push the user in a forward direction. Alternatively, the user can manipulate a switch located on the handlebar to allow the propulsion attachment to pull the user in a reverse direction. The propulsion attachment can include a plurality of brakes, where each brake can control one of the wheels. Additionally, the propulsion attachment can operate at variable speeds using the motor and the power from one or both batteries.

The presently disclosure describes a motion assistance system for a wheelchair, for example, a powered drive wheel system that can continually drive a wheelchair in a circular or elliptical path. The motion assistance system comprises a mounting mechanism attachable to one or more structural elements of the wheelchair, and a drive linkage pivotable with respect to the mounting mechanism. A drive wheel can be mounted to an end of the drive linkage such that the drive wheel contacts the ground when installed on the wheelchair. The drive wheel comprises a plurality of lateral rollers positioned radially about the circumference of the power drive wheel. The lateral rollers can rotate about an axis tangential to the circumference of the drive wheel in order to facilitate driving the wheelchair in a radial direction.