US PATENT SUBCLASS 454 / 325
.~.~.~ Plural blades pivoting along parrallel axes

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
284  DF  .~ Including specific air distributor (e.g., register, etc.) {14}
322  DF  .~.~ With adjustable valve {4}
325.~.~.~ Plural blades pivoting along parrallel axes {1}
326  DF  .~.~.~.~> Adjacent blades pivot in opposing directions

DEFINITION

Classification: 454/325

Plural blades pivoting along parallel axes:

(under subclass 322) Subject matter wherein the airflow regulating means comprises at least two slats or panels rotating about axes extending parallel to one another.

(1) Note. Subject matter including plural blades pivoting along coincident axes is included in this subclass.

(2) Note. This subclass includes subject matter pertaining to a single pivoting blade structure wherein the blade is disclosed as being one of a plurality which pivot along parallel axes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

221, for a window ventilator having an air passage between the sill and the bottom of the sash which includes louvers.

224, for other window ventilators including louvers.

264, for an inlet airway including structure for mixing plural air streams together which has a shaped nozzle and includes louvers.

265+, for other inlet airways including structure for mixing plural air streams together and which include louvers. 277+, for a wall-type inlet airway including a specific cover or shield for the exterior vent opening and includes louvers.

288, for a baseboard-type inlet airway which may include louvers.

290, for a floor-type inlet airway which may include louvers.

299+, for a ceiling-type inlet airway which may include louvers.

309+, for a wall-type inlet airway which includes a louvered air distributor.

335+, for an inlet airway without a specific air distributor which includes a louver which forms an adjustable valve.

347+, for an outlet airway including an air pump which may have air regulating louvers.

358+, for other outlet airways which may have air regulating louvers.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings), particularly

473, for a louvered panel and 633 for location of related structures in other classes. 160, Flexible or Portable Closure, Partition, or Panel,

140+, for louver devices in which the slats are flexible, or are interconnected to each other for relative movement, or may be accumulated (e.g., venetian blinds). See Class 160, Class Definition, for Panel units made up of plural strips, slats, etc..