(under subclass 341) Subject matter wherein the air moving apparatus forces a directed stream of air out of an air withdrawal tube and the exhausting means to create an area of lower air pressure in the tube and thus cause air in the ventilated space to be withdrawn along with the directed stream of air.
(1) Note. The air in the space is withdrawn by the draft caused by the air pump and its directed stream of air--not through, or by, the air pump alone.
