Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Reexamination Certificate
2007-05-22
2007-05-22
Edgar, Richard A. (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
C415S207000, C415S224000
Reexamination Certificate
active
10889008
ABSTRACT:
A centrifugal fan, comprising a frame and a first guide portion. The frame comprises a bottom portion and a curved wall connected thereto. The curved wall comprises an airflow inlet. The first guide portion disposed along the curved wall at the bottom portion comprises a beginning area, a middle area, and an ending area. The middle area connects the beginning and the ending areas, and the beginning area extends from the airflow inlet. The beginning area has a width less than that of the ending area, and the beginning area has a height greater than that of the ending area.
REFERENCES:
patent: 3090543 (1963-05-01), Busquet
patent: 3385511 (1968-05-01), Wentling
patent: 3407995 (1968-10-01), Kinsworthy
patent: 2004/0115049 (2004-06-01), Chien
patent: 60145497 (1985-07-01), None
Chen Te-Fu
Huang Wen-Shi
Lei Tsung-Yu
Lin Kuo-Cheng
Birch & Stewart Kolasch & Birch, LLP
Delta Electronics , Inc.
Edgar Richard A.
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