Face mask with lip, fold, and resilient spring means to improve seal
US5349949A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The equipment, for use by a pilot, is intended to provide the wearer with breathing gas under a pressure greater than ambient pressure. It comprises a mask having a rigid shell provided with fastening straps for holding the mask on the head, with a coupling for feeding breathing gas under pressure, and with a face cover of elastomer material terminated by an internal sealing lip for pressing against the face. The lip is connected to a front portion of the face cover that is secured to the shell by at least one thin deformable fold. Resilient elements are provided along the fold to exert a force that varies little with the amount of deformation and press the lip against the face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.