US PATENT SUBCLASS 454 / 277
.~.~.~ Louver

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
275  DF  .~ Including specific cover or shield for exterior vent opening {1}
276  DF  .~.~ Wall type {1}
277.~.~.~ Louver {5}
278  DF  .~.~.~.~> Having moveable vanes
279  DF  .~.~.~.~> Having serially aligned vane sets
280  DF  .~.~.~.~> Formed in sheet member
281  DF  .~.~.~.~> Having specific vane supporting means {1}
283  DF  .~.~.~.~> With screen mounting means

DEFINITION

Classification: 454/277

Louver:

(under subclass 276) Subject matter including a plurality of generally parallel or concentric slats or slat portions lying within a plane and spaced apart to form an air passageway therebetween.

(1) Note. The dimension of a slat parallel to the direction of air flowing past it must be larger than its overall thickness to be considered a louver slat. Unless it is claimed in combination with, or as part of louver slats or slat portions, wired mesh or a plate with a mere plurality of holes is not considered to be a louver by itself.

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.

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.

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..

312, Supports: Cabinet Structure, particularly

213, and 236 for cabinets having ventilating features.