Impeller and cooling fan incorporating the same

Details Impeller and cooling fan incorporating the same Impeller and cooling fan incorporating the same

2009-03-09

2011-12-13

Dang, Trung Q (Department: 2892)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

C416S24100B

Reexamination Certificate

active

08075276

ABSTRACT:
A cooling fan includes a housing, a cover arranged on the housing, and an impeller received in a space formed between the housing and the cover. The impeller includes a hub and a plurality of blades extending radially and outwardly from the hub. Each of the blades includes a windward surface and a leeward surface opposite to the windward surface. A porous layer is disposed on the leeward surface of each of the blades, adjacent to a free end thereof. The porous layer has one side surface attached to the leeward surface and an opposite side surface facing the windward surface of an adjacent blade.

REFERENCES:
patent: 5257902 (1993-11-01), Atarashi et al.
patent: 01237399 (1989-09-01), None
patent: 03015699 (1991-01-01), None
patent: 05196234 (1993-08-01), None
patent: 07027387 (1995-01-01), None
patent: 2005155437 (2005-06-01), None

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