Variable resistance exercise apparatus
US4540171A · kind A · utility
82Cited by
11References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jun 16, 1982 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Jun 16, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/17
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An apparatus for muscular exercise where the user conducts a repetitive motion under load. The apparatus is coupled to the user to exercise the desired muscle group. When muscle is undergoing a shortening motion it is subjected to a load. At the completion of the shortening motion the load is automatically increased for the muscle-lengthening step. At the completion of the muscle-lengthening portion of the exercise the added load is automatically removed for the next muscle contraction step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.