Patent ID: 7632067

Claim:
A blower housing comprising: a first side wall having a first inner surface, a first outer surface, a first circumferential edge with a first edge margin, and one or more first protrusions protruding from said first edge margin; a second side wall having a second inner surface, a second outer surface, a second circumferential edge with a second edge margin, and one or more second protrusions protruding from said second edge margin; a wrapper wall sheet having a first lateral edge flange and a second lateral edge flange, said first lateral edge flange having a first inner portion, a first outer portion, and one or more first apertures and said second lateral edge flange having a second inner portion, a second outer portion, and one or more second apertures; and the combination of one or more of said first protrusions received and locked within one or more of said first apertures and one or more of said second protrusions received and locked within one or more of said second apertures whereby said first lateral edge flange of said wrapper wall sheet is attached to said first edge margin of said first circumferential edge of said first side wall and said second lateral edge flange of said wrapper wall sheet is attached to said second edge margin of said second circumferential edge of said second side wall, thereby each forming a seam and collectively forming a blower housing.