US PATENT SUBCLASS 454 / 244
.~.~.~ With air pump means for both inlet and outlet airways

Current as of: June, 1999
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454 /   HD   VENTILATION

237  DF  HAVING BOTH INLET AND OUTLET AIRWAYS {6}
241  DF  .~ Including unitary inlet and outlet housing {4}
243  DF  .~.~ Sleeved vent for ceiling, wall, or floor (e.g., thimble) {1}
244.~.~.~ With air pump means for both inlet and outlet airways

DEFINITION

Classification: 454/244

With air pump means for both inlet and outlet airways:

(under subclass 243) Subject matter comprising an air moving means which directly contacts air to force it into the ventilated space and an air moving means which directly contacts air to force it out of the space.

(1) Note. While most subject matter in this subclass comprises a means for contacting and forcing the air into the ventilated space and a separate means for contacting and forcing air out of the space, subject matter comprising a single means which performs both functions is also included herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

235, for subject matter having forced recirculation and both inlet and outlet airways, and further having air pump means for both of the airways, which airways are contained in a unitary housing.

252, for ventilation systems having air pump means for separate inlet and outlet airways.