Abstract: A battery powered, joystick controlled wheelchair includes a battery by which a supply of power can be provided, a joystick by which voltages proportionate to degrees of lean from a neutral position can be produced from the supply of power, and a master power switch by which the supply of power to the joystick can be turned on and off. It is detected whether the voltages produced are forward or reverse direction voltages, and pulse width modulation, resulting in a pulse train, is provided. The pulse train is amplified to deliver driving power with a polarity consistent with a detected direction, and motors are driven by the driving power and, in turn, drive the wheelchair.

Abstract: A battery powered, joystick controlled wheelchair includes a battery by which a supply of power can be provided, a joystick by which voltages proportionate to degrees of lean from a neutral position can be produced from the supply of power, and a master power switch by which the supply of power to the joystick can be turned on and off. It is detected whether the voltages produced are forward or reverse direction voltages, and pulse width modulation, resulting in a pulse train, is provided. The pulse train is amplified to deliver driving power with a polarity consistent with a detected direction, and motors are driven by the driving power and, in turn, drive the wheelchair.

Abstract: A wheelchair having a seat and a plurality of wheels for rolling the wheelchair along a ground surface. A plurality of legs are provided for supporting the seat. Each of the legs is positioned between the seat and one of the wheels. A plurality of struts are also provided. The seat bottom and seat back are pivotally coupled to the seat bottom. The seat back is movable between a folded position and an unfolded position. An actuator for providing at least one actuator output signal in response to movement of the actuator by a user of the device is also provided.

Abstract: A wheelchair having a seat and a plurality of wheels for rolling the wheelchair along a ground surface. A plurality of legs are provided for supporting the seat. Each of the legs is positioned between the seat and one of the wheels. A plurality of struts are also provided. Each of the struts couples a first of the legs to a second of the legs. Each of the legs bears only compressive force in supporting the seat, and each of the struts bears only tensile force. A foldable wheelchair formed from a seat bottom and a seat back pivotally coupled to the seat bottom. The seat back is movable between a folded position and an unfolded position. The seat bottom has a back end formed from a first curved shape, and the seat back has a bottom end formed from a second curved shape. The first curved shape of the seat bottom is sized to mate with the second curved shape of the seat back when the seat back is in the unfolded position.

Abstract: A wheelchair having a seat and a plurality of wheels for rolling the wheelchair along a ground surface. A plurality of legs are provided for supporting the seat. Each of the legs is positioned between the seat and one of the wheels. A plurality of struts are also provided. Each of the struts couples a first of the legs to a second of the legs. Each of the legs bears only compressive force in supporting the seat, and each of the struts bears only tensile force.

Abstract: A wheelchair having a seat and a plurality of wheels for rolling the wheelchair along a ground surface. The seat includes a seat bottom and a seat back pivotally coupled to the seat bottom. The seat back is movable between a folded position and an unfolded position. The seat bottom has a back end formed from a first curved shape, and the seat back has a bottom end formed from a second curved shape. The first curved shape of the seat bottom is sized to mate with the second curved shape of the seat back when the seat back is in the unfolded position. A motor coupled to each rear wheels and a control stick is in communication with each motor for independently operating each of the motor to drive and steer the wheel chair.