US PATENT SUBCLASS 454 / 297
.~.~.~.~ Having portion or element movable during normal use

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}
292  DF  .~.~ Ceiling type {4}
296  DF  .~.~.~ Including perforated or porous element {1}
297.~.~.~.~ Having portion or element movable during normal use {1}
298  DF  .~.~.~.~.~> Axially movable or sliding valve

DEFINITION

Classification: 454/297

Having portion or element movable during normal use:

(under subclass 296) Subject matter wherein the air directing

means has a part capable of motion under usual operating conditions.

(1) Note. A movable portion which only moves during installation of the ventilator, but not subsequently, is not considered proper for this subclass. A readily repositionable portion or element which is bodily movable (e.g., louver vanes or a cover plate) without the use of a special tool (e.g., a screwdriver) is proper for this subclass since this is part of its normal intended use.

SEE OR SEARCH THIS CLASS, SUBCLASS:

333+, for an inlet airway with an adjustable valve.

338, for an inlet airway wherein the movable portion or element is an air pump or is combined with an air pump.