Noise reduction methods and apparatuses for breathing apparatuses and helmets
US10342705B1 · kind B1 · utility
0Cited by
14References
21Claims
0Family size
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Key dates
| Filing date | Jun 13, 2014 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Aug 19, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA42B3/166
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Noise reduction in face masks and helmets reduces ear damage and improves communication by reducing noise in demand regulators with air diffuser perforated plates, screens or open cell foam and by providing muffling chambers. Insertable earmuffs are slid into voids formed in interior padding. Oral-nasal masks are isolated from helmet padding. Various layered helmets shells and padding reduce internal noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.