Mask and a vent assembly therefor
US6561191B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1999 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Dec 1, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A mask (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal's airways. The mask (10) includes a mask shell (12) which is, in use, in fluid communication with a gas supply conduit and a gas washout vent assembly (20). The gas washout vent assembly (20) includes at least one gas washout orifice (22) extending from a first side of the vent assembly (20) positioned, in use, adjacent the human or animal's face and a second side positioned, in use, adjacent the atmosphere. The cross-sectional area of the orifice (22) at the first side is larger than the cross-sectional area of the orifice (22) at the second side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.