US PATENT SUBCLASS 99 / 480
.~.~ By movable damper


Current as of: June, 1999
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99 /   HD   FOODS AND BEVERAGES: APPARATUS

467  DF  SUBJECTING FOOD TO AN ENCLOSED MODIFIED ATMOSPHERE {7}
473  DF  .~ Including means to influence movement of gas within enclosure {4}
480.~.~ By movable damper


DEFINITION

Classification: 99/480

(under subclass 473) Device including a movable member which, by relative movement with respect to a chamber aperture, will permit an increased or decreased rate of flow of gases to enter or leave, the chamber.

SEE OR SEARCH CLASS

110, Furnaces,

163, for a damper of that class (110) type.

126, Stoves and Furnaces,

285+, for dampers in a stove or furnace.

454, Ventilation, 49+, and 173+ for ventilating devices, many of which include dampers; and, see the search notes thereunder.