Axial-flow fan unit and heat-emitting element cooling

Details Axial-flow fan unit and heat-emitting element cooling Axial-flow fan unit and heat-emitting element cooling

2008-01-16

2010-06-22

Thompson, Gregory D (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C165S080200, C165S121000, C415S191000, C416S187000

Reexamination Certificate

active

07742302

ABSTRACT:
An axial-flow fan unit that produces less noise is provided. Blades19are exposed from a venturi29. The shape of each of the blades19is so defined that a space formed between at least an inner surface28aof each of web leg sections28A to28C and an edge19aof each of the blades19located in the radially outward direction of the blades19expands toward the ends of the web leg sections28A to28C (or web bodies30A to30C). With this arrangement, noise produced when the blades19rotate along the web leg sections28A to28C is reduced.

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