Supinator/pronator exercise machine
US4834367A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1988 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jun 16, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2023/003
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An exercise machine for performing supination and pronation exercises comprises a framework, a weight stack carriage that is supported on said frame work for vertical motion, and an input mechanism that is operably coupled by a cable and a system of sheaves on the framework to the weight stack carriage. The input mechanism comprises a horizontal shaft that has operating handles at opposite ends for rotating the shaft. A bi-cam is disposed on the shaft, and one end of the cable is tethered to a high point of the bi-cam. The bi-cam has respective cam profiles in its respective halves; one profile interacts with the cable when the shaft is rotated in one sense from a starting position, and the other profile interacts with the cable when the shaft is rotated in the opposite sense from the starting position. The cams have decreasing profiles so that the torque load imposed on the user progressively decreases as the shaft is rotated from the starting point, thereby enabling the machine to closely match the user's strength profile for performing supinations and pronations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.