Machine element or mechanism – Control lever and linkage systems – Elements
Reexamination Certificate
1999-05-17
2001-06-12
Luong, Vinh T. (Department: 3682)
Machine element or mechanism
Control lever and linkage systems
Elements
C074S551100
Reexamination Certificate
active
06244131
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an improved stem, and more particularly, to an improved stem for a bicycle which provides easy and convenient angle adjustment of the stem.
FIG. 1
shows a conventional stem for a bicycle, said stem comprising a lateral member
1
, a column member
2
and a sleeve
3
wherein the lateral member
1
is securely attached on the upper portion of the column member
2
. It can be readily appreciated that the angle between the column member
2
and the lateral member
1
is fixed, that is to say, it cannot be adjusted. In addition, the sleeve
3
which clamps a handlebar
4
is welded to the lateral member
1
and cannot be adjusted.
SUMMARY OF THE INVENTION
To overcome the drawback of the conventional stem, an object of the present invention is to provide an improved stem which provides easy and convenient angle adjustment of a stem.
To achieve the object mentioned above, the present invention provides an improved stem for a bicycle, which comprises a column member having a top end, a first pivot mechanism and a second pivot mechanism which are provided on the two sides of the top end respectively; a sleeve member for fixing a handlebar, having a rod therefrom which defines a third pivot mechanism and a fourth pivot mechanisms on the two sides thereof, respectively and a lateral member including a left connecting part and a right connecting part wherein each of the left and right connecting part has two ends each having a protruded engaging mechanism adapted to be pivotally attached to the first, second, third and fourth pivot mechanisms so that the lateral member can be pivotally adjusted through the first and second pivot mechanisms, and the sleeve member can be pivotally adjusted through the third and fourth pivot mechanisms.
REFERENCES:
patent: 5138900 (1992-08-01), Hals
patent: 5511444 (1996-04-01), Clausen et al.
patent: 5678458 (1997-10-01), Kao
patent: 5752711 (1998-05-01), Moreau
patent: 5755141 (1998-05-01), Chen
patent: 5779253 (1998-07-01), Lee
patent: 5931049 (1999-08-01), Tsai
Andrus Sceales Starke & Sawall LLP
Hsin Lung Accessories Co. Ltd.
Luong Vinh T.
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