Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate
2008-05-20
2008-05-20
Young, Wayne (Department: 2627)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
C381S322000, C381S324000, C381S151000
Reexamination Certificate
active
07376237
ABSTRACT:
The vibrator system is for generating bone conduction vibrations. A magnet (8a) provides a static magnetic flux (Φ1) that follows a first path. A bobbin (4a) is disposed at a center a vibrator (2). A housing (10) encloses the bobbin and has a coil surrounding a center of the bobbin. The coil is powered by an alternating current for providing an alternating dynamic magnetic flux (Φ2) following the first path through a magnetic circuit. The housing has an upper end (116). The upper end and the bobbin have a first gap (14a) formed therebetween. The housing has a lower end (118) opposite the upper end. The lower end and the bobbin have a second gap (14b) formed therebetween. The magnet is positioned so that the static magnetic flux (Φ1) is passing through the first and second gaps in a direction substantially parallel with an axial direction (A) of the vibrator. Suspension means (16a,16b) are provided for suspending the bobbin in a center of the housing.
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Dykema Gossett PLLC
Oticon A/S
Pendleton Dionne H
Young Wayne
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