US PATENT SUBCLASS 181 / 277
.~.~.~ Movable baffle

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
212  DF  .~ Muffler, fluid conducting type {25}
264  DF  .~.~ With baffle or baffle structure {9}
277.~.~.~ Movable baffle {1}
278  DF  .~.~.~.~> Biased

DEFINITION

Classification: 181/277

Movable baffle:

(under subclass 264) Subject matter having baffles constantly in motion, and driven either under the force of the moving fluid or by some external means.

(1) Note. Subject matter of this subclass type includes, for example, baffles which form rotating vanes.