Brakes – Vehicle – Velocipede
Reexamination Certificate
1999-08-19
2001-07-10
Oberleitner, Robert J. (Department: 3613)
Brakes
Vehicle
Velocipede
C188S024120
Reexamination Certificate
active
06257375
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an improved structure of a brake-tuning device for a bicycle, and in particular, relates to a tuning device for the brake of a bicycle by having an adjusting bolt to regulate the distance between the brake arm and the wheel frame so that the braking operation is effective.
(b) Description of the Prior Art
FIGS. 1
to
3
show the structure of a conventional brake-tuning device comprising a braking arm
1
, an annular rim
6
mounted onto the braking arm
1
, a locking seat
7
having an adjusting bolt
71
positioned on one lateral side thereof, an adjusting block
8
mounted within the locking seat
7
with one end urging against the adjusting bolt
71
, and a spring
91
having one end mounted to the adjusting block
8
and the other end mounted to an insert
9
. When the braking arm
1
is not balanced in the process of braking, the adjusting bolt
71
can be adjusted by rotating the bolt
71
clockwise (inward) such that the bolt
71
urges the adjusting block
8
and drives the spring
91
to deform. Thus, the distance between the braking arm
1
and the wheel frame is adjusted to provide an effective braking operation. However, the conventional brake-tuning structure has the following drawbacks:
1. Adjustment of brake is not precise
In the conventional brake tuning, the annular rim
6
, the locking seat
7
and the adjusting block
8
are involved in order to proceed with the fine adjustment of the brake (as shown in FIG.
3
A). However, as these parts are not so precisely made during the manufacturing process, therefore, it is not possible to achieve precise fine tuning of brake. Furthermore, if the adjusting block
8
is biased towards the locking position of the adjusting bolt
71
, the alignment of the adjusting block
8
with the adjusting bolt
71
cannot be obtained (refer to FIG.
3
B). When the guarding edge
72
of the adjusting block
8
is too long, the adjusting block
8
cannot be accurately urged against (refer to
3
C). In another situation, when the annular rim
6
is too thin and the adjusting block
8
protruded beyond the locking seat
7
, the adjusting of the bolt
71
does not urge the adjusting block
8
(refer to
FIG. 3D
) and the brake-tuning cannot be achieved.
2. High cost in combination of parts:
As the conventional brake tuning involves a plurality of parts, the combination of these parts are too complicated and it causes problem in the storage of these parts.
3. Inconvenient for subsequent brake tuning
As the container
92
for these parts is discarded after the first adjustment of the brake, if subsequent brake tuning is needed, these parts shall be scattered everywhere. Thus, the final installation of these part may be not convenient.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an improved structure of a brake-tuning device, wherein the adjusting of bolt
21
rotates the holding seat
2
, which in turn causes the cable
4
to deform, and the distance between the brake arm
1
and the wheel frame is adjusted to provide an effective braking operation.
It is yet another object of the present invention to provide an improved structure of a brake-tuning device, wherein the stopping block
31
is an elongated shaped which provides a larger urging area to the bolt
21
, so that the bolt
21
will accurately urge the stopping block
31
. In other words, the parts for such a braking system do not need to be very precise and the cost of manufacturing for these parts can be lowered.
Another object of the present invention is to provide an improved structure of a brake-tuning device of a bicycle, wherein no large storage for these parts is required as the parts needed for the present device are lesser than that of the conventional brake-tuning device.
Yet another object of the present invention is to provide an improved structure of a brake-tuning device of a bicycle, wherein the parts are installed onto the forks of the bicycle and will not easily dislocated from the bicycle.
These and other objects and features of the invention will be apparent from the following detailed description taken with reference to the accompanying drawings.
REFERENCES:
patent: 5495920 (1996-03-01), Tsuyoshi
patent: 5740889 (1998-04-01), Tsai
patent: 5788020 (1998-08-01), Tseng
patent: 5853069 (1998-12-01), Lee et al.
patent: 5996743 (1999-12-01), Tseng
A & J
Horng Jia Industry Co., Ltd.
Oberleitner Robert J.
Sy Mariano
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