Patent ID: 6267567
Filing Date: 2001-07-31
Classification: F04D

Abstract:
A cooling fan comprising:a housing (10) having a recess (11) defined therein and a seat (12) forming a bottom face thereof;a circuit board (20) secured on said seat (12) of said housing (10);a coil (34) having an opening defined therethrough;a bracket (35) provided beneath said coil (34) to fix said coil (34) on said circuit board (20);a sleeve (31) with an enclosed first end and received in said opening of said coil (34), and having a fastener (33) formed at a second end thereof which is engaged with an outer side of said coil (34);a collar (50) provided at a bottom face of said sleeve (31);a self-lubricating bearing (60) provided in said sleeve (31) and on said collar (50); anda rotor (70) having a core (71) received in said bearing (60) and inserted through said collar (50), whereby the cooling fan can be assembled easily and produces negligible noise during operation.