Multifunction acoustic device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 1, 2004
Grant Date -
Mar 14, 2002
app pub date -
Sep 6, 2001
filing date -
Sep 12, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A speaker vibrating plate having a voice coil secured thereto is provided in a frame, a rotor having poles is rotatably supported in the frame, and a stator having poles is provided in the frame. A permanent magnet is provided in the rotor for forming a magnetic circuit passing through the rotor and the stator, and a stator coil is provided in the stator. A driving circuit is provided for energizing the stator coil for rotating the rotor.
First Claim
Family
International Classification(s)
Cited Art Landscape
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