| 摘要 |
<p>A wheelchair (1) has four wheel units (3) each of which includes an electric drive motor (17) and transmission gears (15, 16, 18) housed within a hollow egg-shaped wheel (12), a steering motor (25), and mounting means (14, 25') adapted to secure the wheel unit (31) to the body (21) of the wheelchair. Thus each wheel (12) has its own drive motor (17) and steering motor (25) and is independently operable. Various modes of operation of the wheelchair are disclosed.</p> |
