US PATENT SUBCLASS 454 / 347
.~.~ Having readily movable air regulating louver,damper, or cover

Current as of: June, 1999
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454 /   HD   VENTILATION

339  DF  HAVING OUTLET AIRWAY {7}
341  DF  .~ With air pump {9}
347.~.~ Having readily movable air regulating louver,damper, or cover {5}
348  DF  .~.~.~> Continuously horizontal damper panel
349  DF  .~.~.~> Ceiling mounted air pump
350  DF  .~.~.~> Wall mounted air pump {1}
352  DF  .~.~.~> Plural damper panel
353  DF  .~.~.~> Including backdraft preventer

DEFINITION

Classification: 454/347

Having readily movable air regulating louver, damper, or cover:

(under subclass 341) Subject matter including an easily shiftable air permitting or preventing (1) group of parallel or concentric slats, (2) internal body, or (3) orifice cap or closure.

(1) Note. A louver, damper, or cover held in a single fixed position by a separate, movable, screw, bolt, or other permanent type, tool actuated fastener is not considered "readily movable".

SEE OR SEARCH THIS CLASS, SUBCLASS:

4+, for a cap closure for a chimney or stacktop.

94, for a railcar, bus, or trailer having an exterior cap closure for a vent.

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.

275, for an inlet airway having a specific cover or shield for an exterior vent opening.

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.

325+, for an inlet airway including a specific air distributor and additionally a louver which forms an adjustable valve.

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

355, for an outlet airway having an air pump and including a moveable access cover.

356, for an outlet airway having an air pump and including an exterior neck with an enlarged, weather resistant cover. 358+, for other outlet airways having a readily movable louver, damper, or cover.

367+, for other outlet airways having a specific cover or shield for an exterior vent opening.

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.

126, Stoves and Furnaces,

285+, for miscellaneous dampers not otherwise classifiable.

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.