Filtering respirator
US4361146A · kind A · utility
17Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1980 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Sep 18, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA41D13/1146
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A filtering respirator in the form of a mask has an outer casing and a filter layer inside the casing. The edge of the filter liner is sealed to the casing and the rest of the filter layer is spaced from the casing to provide an interspace between them which is connected with the outside atmosphere by an opening in the casing so that exhaled air will leave the mask at a velocity sufficient to prevent inhaling of the exhaled air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.