Double hearing protection device
US7457428B2 · kind B2 · utility
12Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2006 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Mar 19, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F11/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A double hearing protection system comprises a circumaural hearing protector that covers and encircles the pinnae and an earplug device that is inserted into the ear canal. The earplug portion of the system comprises a tether that is coupled to the interior of a circumaural hearing protector. The tether retracts into the earcup when both the earplug and circumaural hearing protector are worn, ensuring that the earseal against the head is not broken by the retractable tether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.