.~.~> Plural blades pivoting along parallel axes {1}
DEFINITION
Classification: 454/333
With adjustable valve (e.g., damper, etc.):
(under subclass 254) Subject matter wherein the air directing means includes a positively repositionable means for regulating the airflow quantity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264, for an inlet airway including structure for mixing plural air streams together which has a shaped nozzle and may include an adjustable valve.
265+, for other inlet airways which include structure for mixing plural air streams together and which may include an adjustable valve.
273+, for an inlet airway including an independent vent sleeve in a ceiling, wall, or floor which contains an adjustable valve.
288, for a baseboard-type air distributor which may include an adjustable valve.
290, for a floor mounted air distributor having an adjustable valve. 297+, for a ceiling-type air distributor including a perforated or porous element and an adjustable valve.
303+, for a ceiling-type air distributor including an elongated output slot and an adjustable valve.
318, for an air distributor having movable louver vanes which form an adjustable valve.
307, for an adjustable air distributing valve comprising an air deflecting wall extending into a ventilated space.
311, for an air distributor having concentric louvers and a separate, adjustable internal damper.
312, for an air distributor having adjustable, concentric, louver vanes.
313+, for a louvered air distributor having moveable louvers.
322+, for an adjustable valve associated with a means for distributing inlet air immediately into the ventilated space.
