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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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This belt-driven air blower provides a uniform flow of air over an extended area. The blower is particularly suitable for cooling electronic devices.
English (United States)
This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately
88% of the total text.
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This belt-driven air blower provides a uniform flow of air over an extended
area. The blower is particularly suitable for cooling electronic devices.
As shown in Figs. 1 and 2, angle blades 11 are attached at either end to
flexible belts 12. The blades are attached to or molded integral with the entire
length of the belts.
The belts are driven by a pair of drive pulleys 13, 14 and extend over idler
pulleys 15, 16. The belts and pulleys are provided with teeth to prevent slippage
and thereby avoid skewing of the blades. A motor 20 is provided to drive pulleys
13, 14 via a shaft 22.
As shown in Fig. 1, air is drawn into the fan from the sides of the pulleys and
is propelled outward from the fan blades over a large surface. In Fig. 2, an
alternate embodiment is illustrated where fixed airstreaming blades 24 are
provided on the upper side of the fan assembly, and a fixed shroud 26 is
provided at one end and along the lower side of the fan assembly to block air
flow where it is not required.
The fan assembly shown can be tailored to the size of the device to be
cooled to deliver a uniform flow across a large outlet area. The blades of the fan
are driven at both ends by this pulley belt and do not need to be as heavy as
those of a conventional fan or blower. The inlet and outlet areas are generally
rectangular which makes it convenient to interface the fan assembly to electronic
packages of the same configuration. The large conformal inlet and outlet areas