Bearings – Rotary bearing – Fluid bearing
Reexamination Certificate
2001-04-10
2003-04-15
Footland, Lenard A. (Department: 3682)
Bearings
Rotary bearing
Fluid bearing
C384S279000
Reexamination Certificate
active
06547439
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a bearing device, and more particularly to a bearing device that can store a lubricating oil, whereby the stored lubricating oil is not easily lost, thereby increasing the lifetime of the bearing device.
2. Description of the Related Art
A conventional bearing device in accordance with the prior art shown in
FIG. 1
comprises a housing
90
having a shaft seat
91
provided with a bearing
92
therein. The bearing
92
defines a shaft hole for pivot of a rotation shaft
94
of a rotor
93
. The bearing
92
is usually a conventional oil-impregnated bearing or self-lubricating bearing. For providing a better lubricating effect to the bearing
92
, the contact position of the bearing
92
and the rotation shaft
94
is provided with a recessed oil storage space
95
, for storing the lubricating oil, so that the rotation shaft
94
and the bearing
92
can achieve a lubricating effect.
In the conventional bearing device, the surface of the rotation shaft
94
serves as a close face. However, the so-called oil-impregnated bearing or self-lubricating bearing
92
forms a non-tight loose fit with the surface of the rotation shaft
94
. Thus, when the rotation shaft
94
is rotated, the lubricating oil gradually leaks outward from the contact face of the rotation shaft
94
and the bearing
92
. When the conventional bearing device is used for a short period of time, the storing oil is lost, so that the contact face between the rotation shaft
94
and the bearing
92
lacks the lubricating oil to produce a rotation noise due to friction, thereby causing inconvenience of the rotation.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a bearing device, wherein the bearing device is provided with an oil storage space. The oil storage space is formed in a closed chamber of the bearing device, thereby slowing down the lost velocity of the lubricating oil stored in the oil storage space, such that the bearing device can maintain the optimal lubricating effect.
Another objective of the present invention is to provide a bearing device, wherein the bearing device has more oil storage space, such that the bearing device can store more lubricating oil, thereby largely increasing the lifetime of the bearing device.
In accordance with the present invention, there is provided a bearing device is provided with an oil storage space. The oil storage space is an oil storage space that is formed in the bearing device, so that the lubricating oil stored in the oil storage space may gradually leak outward through the capillary pores of the bearing device, thereby slowing down the release velocity of the lubricating oil, and thereby increasing the lifetime of the bearing device.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 4838710 (1989-06-01), Ohta et al.
patent: 5145266 (1992-09-01), Saneshige et al.
patent: 6086257 (2000-07-01), Lee
Birch & Stewart Kolasch & Birch, LLP
Footland Lenard A.
Yen Sun Technology Corp.
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