Breathing air filtration devices
US7918225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Nov 7, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B23/06
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A nasal air filtration device includes a pair of either planar or concave-convex filters, a support structure incorporating a pair of generally annular bases or sleeves for supporting the filters, and a bridge that couples the bases or sleeves to maintain them in a desired spaced-apart relation and to determine a desired angular relationship. The support structure is insertable into the nasal cavities to position the filters within corresponding nasal cavities. Flexible rims maintain the support structure and the filters in spaced-apart relation to the surrounding nasal wall. The rims conform to surrounding nasal tissue to form seals. The rims can be selectively inclined to facilitate insertion and resist accidental removal. In certain embodiments the device is combined with a filter that covers the mouth to provide an air filtration system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.