Bearings – Rotary bearing – Resilient bearing surface
Reexamination Certificate
2002-09-10
2003-12-16
Footland, Lenard A. (Department: 3682)
Bearings
Rotary bearing
Resilient bearing surface
C384S220000, C384S255000, C384S260000, C384S263000
Reexamination Certificate
active
06663288
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a bearing structure including a pivot shaft and an elastomer for connecting to a pivot device formed from a first and a second connection member. The pivot shaft includes a connecting portion pivotally connected to the first connection member, a bearing portion fixedly connected to the second connection member, and an eccentric middle portion located between the connecting and the bearing portion. The elastomer is mounted on the first connection member to contact with the eccentric middle portion of the pivot shaft. The first connection member is provided with adjusting means for adjusting a tightness of contact between the elastomer and the eccentric middle portion of the pivot shaft, so that the first and the second connection member are located in place after they have been turned relative to each other.
BACKGROUND OF THE INVENTION
FIG. 1
shows a conventional pivot device
1
, and
FIG. 2
shows the use of the pivot device
1
. As shown, the pivot device
1
mainly includes a first shaft
11
having a bearing portion
111
for fixedly connecting to an article
2
to be pivotally turned, and a hollow receiving portion
112
; and a second shaft
12
having a connecting portion
121
for fixedly connecting to a base
3
relative to which the article
2
is pivotally turned, and an inserting portion
122
for rotatably inserting into the hollow receiving portion
112
of the first shaft
11
.
The bearing portion
111
of the first shaft
11
and the connecting portion
121
of the second shaft
12
are provided with through holes
113
,
123
, respectively, for insertion pins
4
to extend therethrough into cavities
21
,
31
correspondingly provided on the article
2
and the base
3
, respectively.
To assemble the pivot device
1
to the article
2
and the base
3
, first extend the insertion pins
4
through the through holes
123
on the connecting portion
121
of the second shaft
12
into the cavities
31
on the base
3
, so that the second shaft
12
is fixedly connected to the base
3
. Then, put the receiving portion
112
of the first shaft
11
around the inserting portion
122
of the second shaft
12
and extend insertion pins
4
through the through holes
113
on the bearing portion
111
of the first shaft
11
into the cavities
21
on the article
2
, so that the first shaft
11
is fixedly connected to the article
2
. By pivotally turning the receiving portion
112
of the first shaft
11
relative to the inserting portion
122
of the second shaft
12
, the article
2
and the base
3
are rotatable relative to each other.
In the above-described conventional pivot device
1
, there is not any means for controlling a rotational speed of the article
2
and the base
3
when they are turned relative to each other. That is, when the article
2
is rotated relative to the base
3
, a torsional force thereof is controlled completely by an external force. Moreover, since the conventional pivot device
1
does not include any locating means, the article
2
must rely on external means to locate in place relative to the base
3
after it has been turned.
It is therefore tried by the inventor to develop a bearing structure for connecting to a pivot device to eliminate the drawbacks existed in the conventional pivot device.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a bearing structure for connecting to two connection members of a pivot device, so that the two connection members can be rotated relative to each other and be located in place.
Another object of the present invention is to provide a bearing structure for connecting to two connection members of a pivot device, so that a torsional force of the pivot device for rotating the two connection members relative to each other can be adjusted.
REFERENCES:
patent: 4027933 (1977-06-01), Taylor
patent: 4195568 (1980-04-01), Fischer
patent: 5809610 (1998-09-01), Eustache
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