Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Reexamination Certificate
2000-05-15
2001-08-28
Oberleitner, Robert J. (Department: 3613)
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
C188S322150, C267S064180, C280S284000
Reexamination Certificate
active
06279703
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a bicycle shock absorbing adjusting structure wherein the damping force of the absorbing device can be conveniently adjusted by operating the only one adjusting lever.
BACKGROUND OF THE INVENTION
According to
FIG. 6
a conventional bicycle shock absorbing device generally includes a cylinder
71
that is fixedly connected to a bicycle frame such as the seat tube and a plug
72
having a first end thereof movably received in the cylinder
71
. An end member
70
is connected to a second end of the plug
72
and is fixedly connected to another part of the bicycle frame such as a down tube. A first collar
73
is mounted to the cylinder
71
and a second collar
74
is connected to the end member
70
. A spring
75
is mounted to the plug
72
and the cylinder
71
, and is biased between the first collar
73
and the second collar
74
. A container
77
is connected to the cylinder
71
so as to store hydraulic oil therein which results in damping force when the plug
72
moves relative to the cylinder
71
. Two adjusting buttons
76
and
78
are located at the cylinder
76
and the end member
70
so as to adjust the “stiffness” of the shock absorbing device according to practical needs when the bicycle is ridden on rugged roads. It is inconvenient for the rider to adjust the shock absorbing device on the two adjusting buttons
76
and
78
.
The present invention intends to provide a shock absorbing adjusting structure that allows the rider to adjust the shock absorbing device by operating the only one adjusting lever.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a shock absorbing adjusting structure and comprising a cylinder and a tube movably inserted into a first end of the cylinder. An end member is connected to a second end of the cylinder and connected to a bicycle frame. A passage is defined radially in the end member and a central hole is defined in a first side of the end member. An actuating bar is rotatably inserted in the passage and a cam means is located on a first end of the actuating bar. A first end of the tube is connected to the bicycle frame and a second end of the tube is sealed by a ring assembly which is movably engaged with an inside of the cylinder.
A sleeve has a first end securely engaged with the central hole and a rod is movably received in the sleeve. A second end of the sleeve movably extends through the ring assembly and is connected to a piston assembly located in the tube. The rod has a first end engaged with the cam means of the actuating bar and a second end of the rod is a tapered tip. A tapered hole is defined centrally through the piston assembly and a plurality of through holes are defined through the piston assembly. A pusher is movably received in the piston assembly and a seal member is located between the pusher and an inside of the piston assembly to seal the through holes by a spring biased between the seal member and the pusher which is urged by the rod. The tapered tip of the rod is movably engaged with the tapered hole.
The object of the present invention is to provide a bicycle shock absorbing adjusting structure that has only one adjusting lever to adjust the damping force between the cylinder and the sleeve.
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: 1205433 (1916-11-01), Christman
patent: 4337850 (1982-07-01), Shimokura
patent: 4685545 (1987-08-01), Fannin et al.
patent: 5320375 (1994-06-01), Reeves et al.
patent: 5988330 (1999-11-01), Morris
A-Pro Cycles, Inc.
Oberleitner Robert J.
Rodriguez Pamela J.
Rosenberg , Klein & Lee
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