Face mask seal
US4167185A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1977 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Apr 18, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0616
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A resiliently flexible sealing element, conformable to the face of a wearer, in the form of a re-entrant flap is hingedly joined to and supported by a mask body in a spaced relationship thereto. The sealing element extends parametrically around the open side of the mask body and in selected locations thereabout is resiliently urged away from the mask body by web means disposed between the sealing element and the mask body. The web means provides pressure on the sealing surface of the sealing element directly at the deepest point on the user's face so as to eliminate the tendency of the sealing element or flap to pull away from the user's face at such selected locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.