Variable aperture venting for respiratory mask
US6644316B2 · kind B2 · utility
82Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/50
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A respiratory mask having a variable flow venting is provided according to the invention, including a gas supply hose, a mask shell adapted to output a gas to a respiratory system of a person, the mask shell adapted to be connected to the gas supply hose, and an exhaust gas flow volume regulating device which maintains a substantially constant gas flow volume out of the respiratory mask independent of an internal gas pressure inside the respiratory mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.