Customized hearing protection earplug and method for manufacturing the same
US7478702B2 · kind B2 · utility
13Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2004 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Dec 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/658
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a hearing protection earplug (10) to be worn at least in part in a user's ear canal, comprising a shell (12) having a outer surface individually shaped according to the measured inner shape of the user's outer ear and ear canal, and a functional member (20, 30, 120, 144, 220, 320, 420) engaging said shell in a manner so as to be movable relative to said shell between a first functional position and a second functional position, said shell and said functional member having been produced by an additive layer-by-layer build-up process and having an elasticity of between shore D85 and D65.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.