Acoustic valve for hearing device
US10917731B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2018 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Dec 31, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Acoustic valves including a housing having an acoustic passage are disclosed. A bobbin located in the housing includes a valve seat and a body member housing a magnetic core. An electrical coil is disposed about a portion of the body member, an axial dimension of the electrical coil substantially aligned with an axial dimension of the magnetic core. The electrical coil generates a magnetic field when energized. An armature is movably disposed in the housing between the valve seat and a second surface of the acoustic valve. The valve has a first stable state when the armature is positioned against the valve seat, and the valve has a second stable state when the armature is positioned against the second surface. The valve seat and the second surface are on opposite sides of the armature. The armature is movable between the valve seat and the second surface when the electrical coil is energized, such that the acoustic passage is more obstructed when the armature is positioned against the valve seat than when the armature is positioned against the second surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.