An elevating walker chair that allows both riding and walking. The chair elevates by a parallelogram power unit. The seat transforms between a saddle and seat upon changes in saddle/seat elevation. Also a lifting parallelogram power unit structure. Disclosed is an elevating walker chair for people with limited mobility resulting from compromised musculature, coordination or balance, or for able bodied individuals that must perform tasks for which assistance is desired.

Apparatus for a manually-powered wheelchair comprising a frame and first and second wheel rotatably coupled to the frame. Each wheel includes a hand rim and a drive wheel. For each of the first and second wheels, a multiple speed transmission coupled to the wheel comprises a transmission output coupled to the drive wheel, a transmission input coupled to the hand rim, and at least two gears selectively coupling the transmission output to the transmission input. The transmission allows the drive wheel and the hand rim to rotate concentrically with one another but at different speeds. A selector is provided for selecting one of the at least two gears. A controller controls the selector to operate the transmission for the first and/or second wheel.

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. A method includes calculating a set of parameters to control an amount of assistance or resistance generated by the device of the electrically motorized wheel in response to a user input, the set of parameters are calculated in response to a user selecting one of a plurality of operational modes.

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. A system includes a communications module operable to communicate data to a server remote from the electrically motorized wheel and a data integration module in data communication with the server to integrate the data from the sensor system with data from a data source external to the electrically motorized wheel.

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. One method for controlling a device of the electrically motorized wheel includes calculating a set of parameters associated with a fitness level of the user for use in determining an amount of assistance a user will receive from the electrically motorized wheel.

A method for electrically assisting with the propulsion of a rolling system comprising a driving wheel driven by an electric motor, the torque applied by the motor being a function of a propulsion torque transmitted by a user to the driving wheel, wherein the method comprises: a preliminary step of storing in memory an unknown input model representing the weighted system, which is a function of the geometry and of the mass of the weighted system, and having as output data the rotational speed of the driving wheel; a step of estimating unknown input being the total torque applied to the wheel, influencing the rotational speed, the total torque being estimated from the rotational speed by calculating the inverse model; the propulsion torque transmitted by the user being deduced from the total torque estimated on the basis of the other known torques that make up the total torque.

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. The device of the electrically motorized wheel can include a modular systems package including a control system operable to continuously control the device of the electrically motorized wheel in response to a user input.

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. One system is a physical therapy system including a prescription module to prescribe a physical therapy prescription for operation of the device of the electrically motorized wheel and a rehabilitation application in communication with the prescription module to calculate the set of control parameters based on the physical therapy prescription.

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.

The present invention provides a manual stair climbing wheel chair. The wheel chair comprises a hand crank handle, seat reclining devices, a gear box and a driven sprocket wheel set. When the seat of the wheel chair is reclined by using the seat reclining devices, the front and rear wheels of the wheel chair are only driven by the gear box through the driven sprocket wheel set, and cannot be pushed or propelled by hands; the person propelling the wheel chair can drive the front and rear wheels only by rotating the hand crank handle, so that self-slippage of the wheel chair can be avoided when moving up and down on stairs.