Machine element or mechanism – Control lever and linkage systems – Elements
Reexamination Certificate
2000-01-06
2001-09-04
Green, Mary Ann (Department: 3681)
Machine element or mechanism
Control lever and linkage systems
Elements
C280S087041
Reexamination Certificate
active
06282981
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a handlebar height adjustable device for a skate cart. The head tube of the skate cart has a lower section with an enlarged diameter and a steerer tube is received in the lower section, a handlebar column retractably received in the steerer tube.
BACKGROUND OF THE INVENTION
A conventional skate cart as shown in
FIGS. 4 and 5
includes a frame
13
which is pivotally connected to a front part of the skate cart at the first end of the frame
13
by a connection means
11
. A rear wheel
12
is connected to the second end of the frame
13
. The front part includes a head tube
15
which has a lower end in which an inner threaded portion
21
is defined. A steerer tube
140
is threadedly engaged with the inner threaded portion
21
in the head tube
14
at the outer threaded portion
141
of the steerer tube
140
. A front wheel
14
is connected to the steerer tube
140
. A positioning tube
2
is connected to the head tube
15
at the end of the head tube
15
opposite to the front wheel
14
and a handlebar column
160
is retractably received in the positioning tube
2
. A lowest position of a handlebar
16
is when the lower end of the handlebar column
160
contacts the top of the steerer tube
140
. For a safety reason, the handlebar column
160
has to be received in at least one-third of the positioning tube
2
from a top of the positioning tube
2
. In other words, the maximum distance that the handlebar column
160
can be adjusted relative to the positioning tube
2
is “H”. Nevertheless, the length is not long enough for different users.
The present invention intends to provide a handlebar height adjustable device for a skate cart wherein the handlebar column is retractably received in a steerer tube in the head tube so that a longer length of the handlebar column is received in the head tube.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a handlebar height device for a skate cart and comprising a head tube having a top section and a lower section which has an enlarged inner diameter. A steerer tube is inserted into the lower section and has an open top. A handlebar column is retractably received in the head tube and the steerer tube via the open top of the steerer tube.
The object of the present invention is to provide a handlebar height device for a skate cart wherein the steerer tube has an open top and is received in the head tube. The handlebar column is retractably received in the head tube and inserted into the steerer tube via the open top so that a longer handlebar column can be employed.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
REFERENCES:
patent: 1994303 (1935-03-01), Clark
patent: 4203610 (1980-05-01), Mihalik
patent: 5201244 (1993-04-01), Stewart et al.
Browdy and Neimark
Green Mary Ann
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