Respiratory protection device
US9901758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2013 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Sep 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A respiratory protection device is provided that allows the wearers of a facepiece to smoothly have a conversation with each other. A respiratory protection device includes a facepiece. The protection device also includes a voice amplifier that includes a microphone and a speaker therein, a detection unit that directly or indirectly detects the inner pressure of the facepiece, a power source unit, and a control unit. The control unit controls so as to place the voice amplifier in an operational state or a non-operational state, based on a result of comparison of information from the detection unit with a determination reference in the control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.