Axial-flow fan structure

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing with axial flow runner

Reexamination Certificate

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Details

C416S228000, C416S22300B

Reexamination Certificate

active

06981843

ABSTRACT:
An improved axial-flow fan structure is disclosed and claimed, which includes a hub and a plurality of blades. The hub has a top surface and a side surface around which the plurality of blades is mounted. A lateral air intake region is formed above the top surface of the hub and surrounded by edge portions of all of the blades. A lateral air intake surface around the lateral air intake region is constituted by the edge portions of all of the blades. A part of each of the edge portions is fastened to the side surface of the hub.

REFERENCES:
patent: 2284141 (1942-05-01), Funk
patent: 2888188 (1959-05-01), Hersh
patent: 3274410 (1966-09-01), Boivie
patent: 5814908 (1998-09-01), Muszynski

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