US 6,183,221 B2Granted

Heat dissipation fan with a shaft positioned to prevent chafing between the fan blades and the bearing

OwnerHsin-Mao Hsiehinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A heat dissipation fan as disclosed includes a heat dissipation fan blade, a self-lubricating bearing, a stator having an electrical circuit plate and a casing. The heat dissipation fan blade includes a shaft extending therefrom. The shaft has a rounded free end that and contains a neck to seat a locking plate therein. The casing has a collar extending therefrom to hold the stator in place. The collar contains a recess to securely receive the self-lubricating bearing and forms an internal shoulder to restrain and support the locking plate and the self-lubricating bearing. The locking plate is round and contains a through hole therein. The through hole has a diameter corresponding to that of the neck in the shaft. The locking plate has multiple slits formed on the periphery of the through hole. A washer is placed in the bottom of the recess and contains a hole with a diameter smaller than the shaft to abut the free end of the shaft.

Claims1

Dependent claims

A heat dissipation fan with a shaft positioned to prevent chafing between the fan blade and the bearing comprising:

a fan blade including a shaft extending therefrom, said shaft having a neck formed near the free end thereof;
a self-lubricating bearing containing a hole therein to allow said shaft of said fan blade to penetrate therethrough;
a locking plate seated in said neck of said shaft after penetrating said hole of said self-lubricating bearing and containing a through-hole and multiple slits to communicate with said through-hole;
a casing having a collar extending therefrom, said collar containing a recess securely to receive said self-lubricating bearing therein and an internal shoulder in said recess to support said locking plate and said self-lubricating bearing, said recess having a bottom portion and a washer received in said bottom portion of said recess and abutting said free end of said shaft, said washer positioned to prevent chafing between said fan blade and said self-lubricating bearing;
and
a stator with an electrical circuit plate around said collar of said casing.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/430,375Filed 29 Oct 1999
Granted: 6 Feb 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F04D 25/0626
The electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator: details of the lubrication
F04D 25/062
The electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator: details of the bearings
F04D 29/0513
Axial thrust balancing: hydrostatic; hydrodynamic thrust bearings
F04D 29/063
Lubrication: specially adapted for elastic fluid pumps