Back to results
US 2005/0238337 A1Published application
Wheel chair drive apparatus and method
AssigneeMidamerica Electronics Corporation
InventorsWilliam Kidd, John Jenkins
Life of this patent
Estimating the term…
Abstract
A control system for a powered wheel chair drive modulates a pulse power delivery signal such that power is delivered gradually at throttle positions corresponding to a low speed, and power is delivered more rapidly at throttle positions corresponding to a higher speed.
Claims24
(canceled)
The power drive controller for a wheel chair comprising:
- a motor, said motor comprising a wheel with an outer surface of said rotor contacting the ground, said wheel being in operative communication with said power drive for a wheel chair;
- a battery in operative communication with said motor to provide power to said motor;
- a control lever being mounted on a handle adapted to cooperate with said wheel chair and said control lever being disposed to be operated by a wheel chair occupant;
- and
- a processor in operative communication with said motor, said battery and said control lever, said processor being configured to selectively modulate current from said battery to said motor according to a position of said control lever.
2 more elements
The controller of claim 21 wherein said first ratio remains constant within said first range and said at least one other ratio remains constant within said second range.
Dependencies are inferred from the claim text.