Ear protection cap with improved sound absorption
US5815842A · kind A · utility
14Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Aug 12, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F11/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An earmuff incorporating elevated sound attenuation. The earmuff comprises an outer cup (10') which connects with a sealing part. Arranged within the earmuff are a plurality of separating partitioning walls (14) which extend from the bottom wall (16) of the cup towards the sealing part. The partitioning walls (14) may be integral with the cup (10') or formed separately therefrom and loosely fitted thereinto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.