A flaccid mask with straps and a supporting element that force the mask into sealing engagement with the wearer's face in response to force exerted by the straps on the supporting element
US5353789A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/025
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A half mask (1) with a connection opening (13) for a filter (12), with a flexible half mask body (2) with a sealing edge (3) and with a solid filter holder (10) surrounding the half mask body. A strap (16) is connected to the filter holder. Wear comfort and tightness of fit are provided by the half mask body (2) having a supporting structure (17, 19, 21), which extends over at least a certain section and which is brought into engagement with the front sides (18, 20, 22) of the filter holder (10) pointing toward the sealing edge (3) by the strap (16), when the half mask (1) has been put on, in such a manner that the sealing edge (3) is supported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.