Brakes – Operators – Fluid pressure
Reexamination Certificate
2003-06-13
2004-08-10
Schwartz, Chris (Department: 3683)
Brakes
Operators
Fluid pressure
C180S244000, C188S10600P
Reexamination Certificate
active
06772864
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a motorized cycle having an independent brake system, and more particularly to a motorized cycle, wherein the two rear wheels are braked independently, and the four wheels are braked synchronously.
2. Description of the Related Art
A conventional motorized cycle in accordance with the prior art shown in
FIGS. 1-3
comprises a base board
20
, a brake crank
10
, an elastic member S
1
, a first operation member
14
, a first drive plate
30
, a second operation member
33
, and an oil pump
60
.
The base board
20
is provided with a first pivot post
21
. A first locking plate
23
is mounted on an end of the base board
20
.
The brake crank
10
is substantially L-shaped and has a first end provided with a pedal
12
and a second end formed with a pivot hole
13
. The brake crank
10
has a mediate portion formed with a pivot hole
11
pivotally mounted on the first pivot post
21
of the base board
20
and locked on an outer end of the first pivot post
21
of the base board
20
by pivot members including a bolt N
1
and a washer Q
1
.
The elastic member S
1
(such as a tensile spring) is mounted between the brake crank
10
and the base board
20
and has a first end secured on the mediate portion of the brake crank
10
and a second end secured on the base board
20
, so that the brake crank
10
can be returned to the original position by the restoring force of the elastic member S
1
.
The first operation member
14
has a fork-shaped first end pivotally mounted on the second end of the brake crank
10
and formed with two pivot holes
15
pivotally mounted on the pivot hole
13
of the second end of the brake crank
10
by pivot members including a pin P
1
and two E-shaped snap rings E
1
. The first operation member
14
has a second end formed with a threaded rod
16
.
The first drive plate
30
is pivotally mounted on the first operation member
14
and has a mediate portion formed with a pivot hole
31
. A shaft P
2
is pivotally mounted in the pivot hole
31
of the first drive plate
30
and has a mediate portion formed with a through hole P
21
for passage of the threaded rod
16
of the first operation member
14
. A nut N
2
is screwed on the threaded rod
16
of the first operation member
14
and rested on the shaft P
2
. The first drive plate
30
has a fork-shaped first end formed with two pivot holes
32
. The first drive plate
30
has a second end provided with a support shaft
35
.
The motorized cycle further comprises a front brake seat
36
pivotally mounted on the support shaft
35
of the first drive plate
30
by a bolt N
3
and provided with two retaining slots
37
.
The motorized cycle further comprises two front brakes
73
(such as mechanical brakes) each mounted on a front wheel
72
, and two front brake wires
70
each having a first end connected to a respective one of the two front brakes
73
and a second end extended through the first locking plate
23
and formed with a locking head
71
locked in a respective one of the two retaining slots
37
of the front brake seat
36
.
The second operation member
33
is pivotally mounted on the first drive plate
30
and has a fork-shaped first end formed with two pivot holes
34
pivotally mounted on the pivot holes
32
of the first end of the first drive plate
30
by pivot members including a pin P
3
and two E-shaped snap rings E
2
.
The oil pump
60
is mounted on the base board
20
. The second operation member
33
has a second end mounted in a first end of the oil pump
60
to start an oil channel
61
. The oil pump
60
has a second end provided with a brake oil pipe
62
which is extended to a hydraulic disk brake
64
of a rear wheel
63
. In addition, the hydraulic disk brake
64
of the rear wheel
63
is connected to a left handlebar
66
through the brake oil pipe
62
, the oil pump
60
and a brake oil pump
65
(see FIG.
2
).
As shown in
FIG. 2
, under the normal braking operation, the left handlebar
66
is pressed by the driver, so that the brake oil pump
65
and the brake oil pipe
62
can control the hydraulic disk brake
64
so as to brake the rear wheels
63
.
As shown in
FIGS. 1-3
, under the emergency braking operation, the pedal
12
of the brake crank
10
is stepped by the driver to move the first operation member
14
which drives the first drive plate
30
and the second operation member
33
to move in the same direction, so as to control the two front brakes
73
to brake the two front wheels
72
and to control the hydraulic disk brake
64
to brake the rear wheels
63
, so that the four wheels can be braked synchronously.
However, the conventional motorized cycle has to provide an oil pump
60
on the base board
20
and to provide a brake oil pump
65
on the left handlebar
66
, so that the four wheels can be braked synchronously, thereby increasing costs of fabrication.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a motorized cycle, wherein the two rear wheels are braked independently, and the four wheels are braked synchronously.
Another objective of the present invention is to provide a motorized cycle, wherein the left handlebar can be used to control the second drive plate and the second operation member so as to achieve the braking effect, without having to provide a brake oil pump on the left handlebar, so that the motorized cycle only needs an oil pump to achieve the braking effect, thereby decreasing costs of fabrication.
In accordance with the present invention, there is provided a motorized cycle, comprising:
a base board provided with a first pivot post and a second pivot post;
a brake crank having a mediate portion pivotally mounted on the first pivot post of the base board;
a first operation member pivotally mounted on the brake crank;
a first drive plate pivotally mounted on the first operation member;
two front brake wires each having a first end connected to a front brake and a second end secured on the first drive plate;
an oil pump mounted on the base board and having a first end and a second end;
the second end of the oil pump being provided with a brake oil pipe which is extended to a hydraulic disk brake of a rear wheel;
a second operation member having a first end pivotally mounted on the first drive plate and a second end mounted in the first end of the oil pump to open and close an oil path of the oil pump;
a second drive plate combined with the first drive plate and the second operation member and having a first end pivotally connected with the second operation member and the first drive plate;
the second drive plate having a mediate portion pivotally mounted on the second pivot post of the base board; and
a rear brake wire having a first end connected to a handlebar and a second end locked on a second end of the second drive plate.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 6478103 (2002-11-01), Matsuura
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