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A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling with the bottom piece to define an interior of t

A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling with the bottom piece to define an interior of the blower housing. The top piece includes an annular lower support portion for supporting the blower motor and an annular upper portion extending above and around the lower portion. The upper portion has an outer peripheral edge and lugs extending outward beyond the outer peripheral edge. The lugs have lug holes to receive mechanical fasteners to secure the blower housing to an external device. The head of the mechanical fasteners are positioned above the lugs on the upper portion of the top piece. In this arrangement the diameter of the bottom piece is not limited by a need to accommodate spacing for the head of the mechanical fastener. Additionally, the top piece and bottom piece have interlocking internal seals that provide positive engagement when the blower housing is assembled.

대표청구항 ▼

1. A blower for a furnace having a two-piece blower housing, a first of said pieces having an upstanding sidewall, the second of said pieces having a mating circumferential groove within which said sidewall is received, and an annular snap fit seal between two mating surfaces of said first and secon

1. A blower for a furnace having a two-piece blower housing, a first of said pieces having an upstanding sidewall, the second of said pieces having a mating circumferential groove within which said sidewall is received, and an annular snap fit seal between two mating surfaces of said first and second housing pieces;said snap fit seal comprising an annular notch formed on one of said first and second pieces and a mating annular rib formed on the other of said first and second pieces; and said first piece has the annular notch formed on an interior surface of said sidewall and the second piece has the rib formed on a mating surface.