US2003124000A1PendingUtilityA1

Heat dissipation fan

32
Priority: Dec 28, 2001Filed: Dec 28, 2001Published: Jul 3, 2003
Est. expiryDec 28, 2021(expired)· nominal 20-yr term from priority
Inventors:Po-Jen ShihTai-Ying Lu
H02K 7/09H02K 7/085H02K 5/1675H02K 5/1735F04D 25/0626F04D 25/062
32
PatentIndex Score
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Claims

Abstract

A heat dissipation fan includes a fan blade body having a shaft mounted thereon; an inner assembly installed within the fan blade body, the inner assembly comprises an iron casing, a ring-shaped permanent magnet installed inside the iron casing, a stator bobbin with the winding of a coil thereof, and a sleeve installed in the center of the stator bobbin, and within the sleeve there are mounted a ball bearing and a lubricating bearing under the ball bearing, and wherein an upper end of the ball bearing abuts against an O-ring and a lower end of the lubricating bearing abuts against a C-type clamping ring, and wherein a lower end of the sleeve is securely mounted on a circuit board and a base; and a magnetic device installed on the base in a position corresponding to a lower end of the shaft to attract the shaft.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A heat dissipation fan comprising: 
 a fan blade body having a shaft mounted thereon;    an inner assembly installed within the fan blade body, wherein the shaft is inserted in the inner assembly, the inner assembly comprises an iron casing, a ring-shaped permanent magnet installed inside the iron casing, a stator bobbin with the winding of a coil thereof, and a sleeve installed in the center of the stator bobbin, and within the sleeve there are mounted a ball bearing and a lubricating bearing under the ball bearing, and wherein an upper end of the ball bearing abuts against an O-ring and a lower end of the lubricating bearing abuts against a C-type clamping ring, and wherein a lower end of the sleeve is securely mounted on a circuit board and a base; and    a magnetic device installed on the base in a position corresponding to a lower end of the shaft to attract the shaft.    
     
     
         2 . The heat dissipation fan of  claim 1  wherein the fan blade body comprises a chamber for accommodating the inner assembly.  
     
     
         3 . The heat dissipation fan of  claim 1  wherein the magnetic comprises a permanent magnet and a magnetic guide plate.

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