Respirator filtration device
US5732695A · kind A · utility
75Cited by
5References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1997 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Mar 11, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B23/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A novel filtration device having a substantially rigid frame comprised of an outer peripheral band connected by a plurality of spacers to an inner breather tube, wherein filter pads are secured over both sides of the frame and separated by the spacers to form an enclosed central air pocket accessible only through the breather tube. The breather tube is adapted to be detachably connected to an inlet port in a respirator face mask so as to provide a closed channel for air flow from the central air pocket to the interior of the face mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.