Safety features for continuous motion therapy system
US4798197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Mar 10, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Safety features for a continuous motion therapy system of the type including a carriage for supporting a patient's limb, a drive unit for driving the carriage through a range of reciprocal angular movement, first and second channel neuromuscular stimulators for applying electrical stimulation to muscles of a patient's limb, and a controller for controlling the drive unit and stimulators. Both stimulator channels must be turned OFF after the controller is powered up before either stimulator channel will operate. The drive unit is enclosed by a cover. When pressure on the cover is sensed, the controller stops and reverses the direction of the carriage. The drive unit includes a drive motor which is coupled to the carriage by a linkage. Limit switches provide limit signals when the linkage reaches predetermined limit positions. In response, the controller stops and reverses direction of the carriage. A remote patient controller which is coupled to the controller by a multiconductor cable permits the patient to control motion of the carriage from a remote location. Should the cable be disconnected from the controller, or should any lead therein become open or short circuited, the contr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.