Patent ID: 7841045
Filing Date: 2010-11-30
Classification: A47L,B08B,F04D

Abstract:
1. In combination, a hand-held air blower comprising a hollow, substantially cylindrical housing having an open front end, a plurality of air intake openings, an impeller situated within said housing proximate said intake openings, a motor for driving said impeller, battery means for powering said motor, and a concentrator, said concentrator comprising means for removably attaching said concentrator to said open front end of said housing and a hollow shell, said shell comprising an intake section with a diameter substantially equal to the diameter of the front end of said housing and an outlet section with an outlet opening substantially smaller than said diameter of said front end of said housing, a balancing member comprising a body with a central air flow channel and an exterior surface having a truncated football-like shape, and means for mounting said member within said intake shell section with said balancing member spaced from the interior surface of said intake shell section so as to permit air flow therebetween.