Shaftless cooling fans
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Mar 24, 2005
app pub date -
Sep 24, 2003
filing date -
Sep 24, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A shaftless cooling fan is comprised of a fan body pivotally mounted on a fan base through a configured shaft. The fan base further comprises a plurality of vents, an electrical device for driving the fan body, a recess in its top and bottom ends for positioning a shaft end respectively, and a plurality of electromagnets surrounding the recess in the bottom end. The fan body is rotatably positioned in the fan base by placing the shaft ends in respective recesses, and there is also a plurality of permanent magnets aligned surrounding the lower shaft end, in which every permanent magnet is comprised of a magnetic N-zone, an S-zone, and a Neutral zone, and repeatedly structured. Every electromagnet is controlled by the electrical device to form magnetic zones corresponding to the N-zone, S-zone, and Neutral zone of each the permanent magnet, such that each permanent magnet is driven to rotate the fan body by changing the magnetic zones in each electromagnet.
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