Noise reduction gas path structure, gas path device and respirator
US12322364B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2024 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Dec 5, 2044 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A noise reduction gas path structure includes a gas path chamber; an acoustically transparent and anti-aeration element in the gas path chamber, the acoustically transparent and anti-aeration element is configured to divide the gas path chamber into a gas flow portion and a sound-absorbing portion; and a sound-absorbing filler in the sound-absorbing portion, the sound-absorbing filler is configured to absorb sound entering the sound-absorbing portion from the gas flow portion through the acoustically transparent and anti-aeration element. A gas path device includes the above noise reduction gas path structure. And a respirator includes the gas path device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.