US PATENT SUBCLASS 454 / 336
.~.~.~ Adjacent blades pivot in opposing directions

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
333  DF  .~ With adjustable valve (e.g., damper, etc.) {2}
335  DF  .~.~ Plural blades pivoting along parallel axes {1}
336.~.~.~ Adjacent blades pivot in opposing directions

DEFINITION

Classification: 454/336

Adjacent blades pivot in opposing directions:

(under subclass 335) Subject matter wherein the two slats or panels are positioned next to one another and wherein the slats or panels rotate about their axes in opposite directions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

326, for an air distributor with an adjustable valve having adjacent blades pivoting along parallel axes.