Patent ID: 6037688
Filing Date: 2000-03-14
Classification: F04D,F05D,H02K

Abstract:
In combination, a motor housing and a diffuser plate, wherein a shroud having an air intake aperture therethrough encloses a portion of the motor housing and a fan adjacent the diffuser plate, the combination comprising:a motor housing having a cylindrical cup portion, a circumferential flange portion extending from said cup portion, and a plurality of flange ramp surfaces extending from said flange portion, each said flange ramp surface having a ramp face extending from said flange portion; anda diffuser plate having a main body portion with a first side opposite a second side, said main body portion having a plurality of scallops disposed around an outer periphery of said first side which terminate at an air inlet aperture that extends through to said second side, each said scallop providing a diffuser ramp surface that terminates at a step, said diffuser plate mating with said motor housing such that said ramp faces are respectively positioned adjacent said steps to form continuous ramp surfaces from said plurality of flange ramp surfaces and said plurality of diffuser ramp surfaces.