Oil-circulating structure for fan

Details Oil-circulating structure for fan Oil-circulating structure for fan

2005-02-01

2005-02-01

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

Reexamination Certificate

active

06848830

ABSTRACT:
An oil-circulating structure for fan comprises an oily bearing with a central axis hole for pivoting a fan shaft. An inner oil-collecting recess trench is formed in the central axis hole of the oily bearing and has an inner thread shape oil-guiding trench set inside. Radial through holes penetrate from two ends of the inner thread shape oil-guiding trench to outside wall of the bearing. An outer oil-collecting recess trench is formed on the outside wall of the bearing and is connected with the inner thread shape oil-guiding trench by means of the radial through holes. When the fan rotates, a lubricant in the inner oil-collecting recess trench is pushed by the rotating fan shaft to flow in-and-out between the outer oil-collecting recess trench and the inner oil-collecting recess trench through the inner thread shape oil-guiding trench and the radial through holes so as to achieve oil-circulation of the oily bearing in which the lubricant won't overflow through the end surface of the oily bearing.

REFERENCES:
patent: 4764085 (1988-08-01), Jesinger
patent: 5847479 (1998-12-01), Wang et al.

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