Claims
- 1. 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; and
- a 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.
- 2. The combination according to claim 1, wherein each said flange ramp surface extends from an outer periphery of said flange portion to an inner periphery of said flange portion displaced from said outer periphery.
- 3. The combination according to claim 1, wherein each said scallop has a curve wall on said first side that extends into a curvilinearly extending wall on said second side that is adjacent a corresponding said flange ramp surface, wherein said flange ramp surfaces and adjacent said curvilinearly extending walls form air chambers.
- 4. The combination according to claim 3, further comprising:
- a bearing holder extending from said second side and surrounding said shaft aperture, said bearing holder having a radius transition to said second side.
Parent Case Info
This application is a continuation of application Ser. No. 08/554,934, now U.S. Pat. No. 5,734,214, filed Nov. 9, 1995, which is incorporated herein by reference.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4057370 |
Numata et al. |
Nov 1977 |
|
Foreign Referenced Citations (6)
Number |
Date |
Country |
0 023 609 A1 |
Jul 1980 |
EPX |
0 552 978 A2 |
Jan 1993 |
EPX |
3802890 A1 |
Aug 1989 |
DEX |
63-109300 |
May 1988 |
JPX |
3138492 |
Jun 1991 |
JPX |
6123297 |
May 1994 |
JPX |
Continuations (1)
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Number |
Date |
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Parent |
554934 |
Nov 1995 |
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