US PATENT SUBCLASS 181 / 166
.~ With damping means

Current as of: June, 1999
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181 /   HD   ACOUSTICS

157  DF  DIAPHRAGM {10}
166.~ With damping means

DEFINITION

Classification: 181/166

(under subclass 157) Subject matter including means to suppress or limit diaphragm vibrations.

(1) Note. The damping means must be in addition to diaphragm structure, for example an air chamber, a travel limiter, or a special coating on the diaphragm.

SEE OR SEARCH THIS CLASS, SUBCLASS:

174, for diaphragms having portions of different thickness which might dampen vibrations.