Patent ID: 6881035

Claim:
A blower assembly for use in expelling gases from a furnace through an exhaust pipe comprising: a blower housing having an internal impeller cavity defined by an outer wall and a top wall, the blower housing having an inlet opening for receiving exhaust gases from the furnace; a drive motor mounted to the blower housing, the drive motor including a drive shaft extending through the blower housing and into the impeller cavity; and an impeller mounted to the motor shaft and contained within the impeller cavity, the impeller being formed from a single sheet of metal and having a plurality of impeller blades, wherein each of the impeller blades are backward inclined and forward curved; wherein each of the impeller blades includes a blade portion extending from a leading edge to a trailing edge, each of the blade portions being bent perpendicular to an impeller back wall to an operating condition, each impeller blade including a back wall trailing edge, wherein the leading edge of each impeller blade portion is directly adjacent the back wall trailing edge of an adjacent impeller blade prior to the impeller blade portion being bent 90° into its operating position.