Particle brake clutch muscle exercise and rehabilitation apparatus
US4765315A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jun 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S482/901
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A muscle exercise and rehabilitation apparatus includes a movable fixture against which an actuating force can be applied; a particle brake clutch for applying a braking force to the fixture in linear dependence on a braking current supplied thereto, in counteracting relation to the actuating force; a control circuit for controlling the supply of braking current to the particle brake clutch so that the latter controls the fixture to move in at least one of an isometric, isotonic and isokinetic mode of operation; and a hysteresis compensating circuit for supplying a reverse current to the particle brake clutch to cancel out hysteresis in the particle brake clutch in dependence on the amount of braking current previously supplied to the particle brake clutch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.