Logic-controlled occlusive cuff system
US4294261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1976 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Jun 1, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/352
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The occlusive cuff system of this invention comprises a pressure cuff and a source of regulated compressed gas feeding the cuff through an electrically-operated fill valve. An electrically-operated vent valve vents the cuff to the ambient pressure. The fill valve is normally closed and the vent valve is normally open. In response to an external start signal, a logic network opens the fill valve and closes the vent valve, thereby starting the pressurization cycle and a timer. A pressure transducer continuously monitors the pressure in the cuff. When the transducer's output equals a selected reference voltage, a comparator causes the logic network to close the fill valve. The timer, after a selected time delay, opens the vent valve to the ambient pressure, thereby ending the pressurization cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.