Air purification respirator voice amplifier
US9833644B2 · kind B2 · utility
2Cited by
15References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2014 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An electrical amplifier unit which removably attaches to a gas mask and includes a microphone for detecting voice sounds emitted by the wearer of the gas mask, circuitry for amplifying the detecting sound, and a loudspeaker for emitting the amplified sounds externally of the mask. The associated components are contained within a housing that attaches sealably to the outlet port of a gas mask. The amplifier unit is quickly and easily attachable to commercially available gas masks without additional hardware and does not affect the structural and functional integrity of the host mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.