Bearings – Rotary bearing – Plain bearing
Reexamination Certificate
2000-10-27
2002-06-18
Footland, Lenard A. (Department: 3682)
Bearings
Rotary bearing
Plain bearing
C384S903000
Reexamination Certificate
active
06406185
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a spindle seat in a fan, and particularly to a spindle seat, which contacts with a spindle provided with conical end to result in a reduced frictional resistance for a fan with smooth run and low noise under a condition of less heat generation.
2. Description of Related Art
The application of cooling fan has been widely in a variety of locations such as the central processing unit and the power supply device in a computer. Once the cooling fan abnormally provides the function of cooling, it may affect the equipment to run smoothly. It is therefore that the cooling fan plays an important role for a normal operation of the equipment.
The conventional cooling fan usually provides a structure shown in
FIG. 3
that a spindle
2
is pivotally fixed to the center of a stator in a motor by way of ball bearings
322
. Although the ball bearing
322
is a point contact with the spindle
2
for an easy running of the spindle
2
, metal balls in the ball bearing
322
may generate noise and the ball bearing
322
is expensive in cost. In order to lower the cost, an oil bearing is used to replace the ball bearing
233
. But, the inner wall of the oil bearing may wear out after being used for a period of time. Thus, it results in the axial fitting hole thereof has a size of inaccuracy such that the noise and the friction force may increase gradually.
SUMMARY OF THE INVENTION
Accordingly, a main object of the present invention is to provide a spindle seat in a fan, which comprises a spindle with a conical end to reduce a frictional area so as to minimize the friction force generated.
REFERENCES:
patent: 2894439 (1959-07-01), Burger et al.
patent: 3300260 (1967-01-01), Stern
patent: 4452540 (1984-06-01), Rivoir
Asia Vital Components Co. Ltd.
Footland Lenard A.
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