Pressure sensitive flow control valve
US5878743A · kind A · utility
92Cited by
14References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0066
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pressure sensitive valve for a positive pressure airway system which allows bi-directional flow with low resistance. When positive pressure from the air generator of the positive pressure airway system is lost, a spring actuated disc moves away from its compressed position to block the outlet of the air generator. By blocking the outlet of the air generator, the path of entry for contaminants is significantly restricted in so doing, an alternate, low resistance path to atmosphere is exposed to allow contaminants to escape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.