Cooling fan
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 17, 2009
Grant Date -
May 24, 2007
app pub date -
Jul 7, 2006
filing date -
Nov 23, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cooling fan includes: a casing having a surrounding wall that defines an accommodating space; a circuit board disposed in the accommodating space and including a substrate and a control circuit, the substrate having a center portion that has a peripheral edge, and a plurality of spaced apart connecting beams that extend from the peripheral edge of the center portion and that are connected directly and securely to the surrounding wall; a hollow shaft secured directly to and protruding from the circuit board into the accommodating space; a stator mounted securely on the center portion of the substrate of the circuit board and coupled to the control circuit; a fan blade unit disposed in the accommodating space and including an annular hub journalled rotatably to the hollow shaft; and a rotor mounted on the hub.
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