Cooling fan with an oil-retaining bushing

Details Cooling fan with an oil-retaining bushing Cooling fan with an oil-retaining bushing

1999-01-06

2000-08-15

Freay, Charles G.

Pumps

Motor driven

Electric or magnetic motor

184 5, 184100, 384322, 384397, F04B 1700

Patent

active

061026751

ABSTRACT:
A cooling fan with an oil-retaining bushing has a rotor, a stator and a housing. A self-lubricating bushing is provided within the sleeve of the housing. The spindle of the rotor is disposed in a the bushing and fixed by a retaining ring. The bushings define an annual slot at each end thereof. A solid grease is applied into the annular slots. When the rotor rotates, the friction of the spindle and the bushings generates enough heat to melt the grease. The melted grease lubricates the spindle and the bushings to assure the smooth and even operation of the fan. Therefore, the useful life of the fan is lengthened.

REFERENCES:
patent: 3590957 (1971-07-01), Campbell et al.
patent: 3705753 (1972-12-01), Bierlein et al.
patent: 4861237 (1989-08-01), Shiraki et al.
patent: 5093599 (1992-03-01), Horng
patent: 5917262 (1999-06-01), Huang et al.

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