Patent ID: 6368076
Filing Date: 2002-04-09
Classification: A47L,F04D

Abstract:
An apparatus including:first air port means for allowing a passage of a first air flow; first fan means, said first air flow generated by rotation of said first fan means; second fan means for rotating coupled to said first fan means, said second fan means having opposite blade orientation from that of said first fan means so that the first air flow is in opposite direction to a second air flow; a tubular housing enclosing and coupled to the first fan means and the second fan means, with one end of said housing terminating at the first air port means; a wall coupled to an inside surface of the housing which separates the first fan means from the second fan means; and second air port means for allowing a passage of a second air flow, said second air flow generated by rotation of said second fan means, wherein said first fan means and said second fan means are disposed between said first air port means and said second air port means.