Hand operated wheel chair or exercise machine using racks operated by variable length lever
US5762350A · kind A · utility
8Cited by
5References
4Claims
0Family size
Inventor
Key dates
| Filing date | Feb 1, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 1, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M1/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This improvement is for a hand operated wheel chair or exercise machine. The machine uses two racks to operate two one way clutches to furnish forward motion from both the forward and backward strokes of the input lever arm. The mechanical advantage of the input lever arm is readily changeable to affect the overall gear ratio of the drive. Steering is accomplished by turning a wheel on the lever arm. The control is similar to that on a wheel controlled airplane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.