End of service life indicator for respirator
US9011584B2 · kind B2 · utility
7Cited by
23References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2012 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/35
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device includes a cartridge containing a filter material. An insert extends through at least a portion of the filter material. The insert has gas sample path with an opening to provide a sample of air that is representative of the saturation of the filter material. A return path may be included in the insert to return sampled gas to the filter material. A gas mask contains a gas sensor and coupled to the cartridge, which may be replaced when saturated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.