G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 1/02 (2006.01) A61G 5/04 (2006.01) A61G 5/08 (2006.01) A61G 5/12 (2006.01) G05F 5/06 (2006.01)
Patent
CA 2421860
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. Included is a portable mobility device that includes an actuator for providing at least one actuator output signal in response to movement of the actuator by a user of the device. The actuator is movable over a range of positions, the range of positions being bounded by a minimum speed actuator position at a first end of the range and a maximum speed actuator position at an opposite end of the range. The range of positions includes a mid-point actuator position located on the range exactly midway between the minimum speed actuator position and the maximum speed actuator position. The actuator output signal has a magnitude that is linearly related to the position of the actuator on the range of positions. A nonlinear amplifier, responsive to the actuator output signal, is provided for outputting a motor control signal. The motor control signal has a minimum value when the actuator is located at the minimum speed actuator position, a maximum value when the actuator is located at the maximum speed actuator position, and the motor control signal has its median value when the actuator is located between the mid-point speed actuator position and the maximum speed actuator position.
Choi Oong
Ingle Fred E.
G. Ronald Bell & Associates
Wheelchair Carrier Inc.
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