Patent ID: 6648935
Filing Date: 2003-11-18
Classification: B01D,F04D

Abstract:
An extracting blower, comprising:a. a fan housing having a longitudinal axis, a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber; b. a first opening in the fan housing and a second opening in the interior wall; c. a rotatable impeller having a longitudinal axis, located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a plurality of impeller blades extending outwardly from the longitudinal axis of the impeller and extending substantially along the longitudinal axis of the fan housing and through the second opening; d. the fan housing having a side wall, a front wall, and a rear wall, including a tangential section extending tangentially from the side wall, the tangential section, a portion of each of the side wall, front wall, and rear wall, forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion of the chute is in fluid communication with the front chamber of the fan housing and the rear portion of the chute is in fluid communication with the rear chamber of the fan housing; e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall extending substantially along the longitudinal axis of the fan housing between the front wall and the interior wall, the contaminant deflection wall lying in a plane which is substantially parallel with the longitudinal axis of the impeller.