Self-sealing protection filter port
US7101412B2 · kind B2 · utility
20Cited by
5References
58Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Jan 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/35
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A self-sealing protection filter port for gas masks prevents contamination of the inner-environment of the mask during exchange of filters and therefore increases safety. A biased valve closes the air inlet to the port when the protection filter is not installed. As a new filter is inserted, the valve is forced open, allowing filtered air to flow through the air inlet to the user. The protection filter engages the filter port using a retaining element. The self-sealing protection filter in a protection mask having an internal close-biased valve is installed in the standard protection filter port of the mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.