Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2000-05-05
2001-10-09
Hurley, Kevin (Department: 3619)
Land vehicles
Wheeled
Occupant propelled type
Reexamination Certificate
active
06299190
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a frame for a motorbike front fork and includes two boards wherein each board has two tapered holes with which two legs of the front fork engaged. A tapered clamp ring is mounted to each leg and a threading ring is mounted to the tapered clamp and the threading ring is threadedly engaged with an inner threaded portion of the tapered hole.
BACKGROUND OF THE INVENTION
A conventional frame for a motorbike front fork is shown in FIG.
7
and generally includes a first board
71
and a second board
72
, two legs
73
of the front fork extending through the two boards
71
and
72
. Each of the first board
71
and the second board
72
is a triangle board and tow peaks of each board
71
/
72
has a circular portion so that there is enough area to let the two legs
73
respectively extend through the circular portions. Each circular portion on the first/second board
71
/
72
has a hole
711
/
721
and a slit
712
/
722
is defined in the circular portion and communicates with the hole
711
/
721
. The slit
712
/
722
defines two ends of the circular portion so that when the leg
73
is received in the hole
711
/
721
, a bolt
74
extends laterally through one end from outside of the circular portion, passes through the slit
712
/
722
and is threadedly engaged with the other end to securely clamp the leg
73
. It is experienced that the connection between the first board
71
, the second board
72
and the two legs
73
is not secured enough especially when riding on a serrated road. That is because the bolts
74
cannot provide sufficient clamping force to clamp the legs
73
.
The present invention intends to provide a frame for a motorbike front fork and the two legs of the front fork are securely connected to the two boards by tapered clamping rings cooperated with threading rings.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a frame for a motorbike front fork and comprising a first board and a second board which is connected to the first board by a connection rod. Two first tapered recesses defined in a bottom of the first board and a first inner threaded portion is defined in an inner periphery of each first tapered recess. The second board has two holes defined therethrough. Two second tapered recesses are defined in a bottom of the second board and respectively communicate with the two holes. A second inner threaded portion is defined in an inner periphery of each second tapered recess.
Two legs of the front fork extend through the two holes and are engaged with the two first tapered recesses. Four clamping members are respectively mounted to the two legs and engaged with the two first tapered recesses and the two second tapered recesses. Each clamping member has a threading ring mounted thereto and the four threading rings are engaged with inner threaded portions of the first tapered recesses and the second tapered recesses.
The object of the present invention is to provide a frame for a motorbike front fork and the two legs of the front fork are securely engaged with the two boards of the frame by tapered clamping members cooperated with threading rings which is engaged with holes in the two boards.
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: 3556557 (1971-01-01), Blair
patent: 3811705 (1974-05-01), D'Ambra
patent: 4512592 (1985-04-01), Yoshioka
patent: 5603521 (1997-02-01), Bontrager
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