| 摘要 |
This wheelchair drive system consists of one-way bearings mounted on drive axles coaxial with the drive wheels of a wheelchair, drive levers attached to these axles, drive rods retractably extending through said levers and then through said axles, drive handles at the proximal tips of the drive rods, and frictional braking surfaces on the sides of the drive levers proximal to the wheelchair drive wheels. The drive levers allow the user to push against a handle, maintaining a continuous grip. By pushing on the drive levers, the wheelchair is propelled forward. The one-way bearings allow drive levers to silently rotate the levers back to a position where they can be pushed forward again, thereby allowing the user to silently move the chair forward without having to sequentially grab, push, release, reacquire, then push or propel the drive rims, hand-rings, or wheels, on many wheelchairs. Reacting the drive rods allows the users to disengage the drive axles, attaning a neutral position. Engagement of the frictional braking surface and rearward rotation of a given lever, while in neutral, provides reverse motion of said neutral wheel. Frictional braking surfaces on the inside of the drive levers are actuated by pressing the lever(s) against the wheel hand-rings, thereby slowing, turning, pivoting, or stopping the chair.
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