Bicycle frame assembly

Details Bicycle frame assembly Bicycle frame assembly

2002-06-25

2004-06-01

Morris, Lesley D. (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

Reexamination Certificate

active

06742796

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a bicycle frame which includes a three connection parts for respectively connecting respective parts of the frame so that the assembling of the bicycle frame can be made in a short period of time.
BACKGROUND OF THE INVENTION
A conventional bicycle frame
80
is shown in FIG.
7
and generally includes a seat tube
83
with a top tube
81
and a seat stay
84
connected at a higher position of the seat tube
83
. A bottom bracket
87
is connected to a lower position of the seat tube
83
and a down tube
82
and a chain stay
85
are connected to the bottom bracket
87
. A head tube
86
is connected to the two respective ends of the top tube
81
and the down tube
82
. A hook plate is connected to two respective ends of the seat stay
84
and the chain stay
85
. It Is to be noted that all the parts mentioned above are connected with each other by welding so as to form a solid frame. Nevertheless, the welding quality is a main concern for a solid frame and the welding processes take a lot of time and involve manual errors. Besides, the size of the bicycle frame cannot be easily changed before welding.
The present invention intends to provide a bicycle frame wherein the top tube, down tube, seat stay and the chain stay are easily adhered with connection parts on the seat tube so that the whole assembly becomes easy and efficient.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is a bicycle frame which comprises a seat tube with a connection part connected to a top thereof and a bottom bracket connected to a bottom. The connection part has a first passage for being securely mounted to the seat tube, and a first branch and a second branch which are respectively connected to the top tube and the seat stay.
The bottom bracket has a third branch and a second branch which are respectively connected to the down tube and the chain stay. A head tube is connected to two respective second ends of the top tube and the down tube. A hook plate is connected two respective second ends of the seat stay and the chain stay. The connection part is connected to the seat tube by adhesive.
The primary object of the present invention is to provide a bicycle frame that is easily to be assembled and the size of the frame can be easily changed before assembling.
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, a preferred embodiment in accordance with the present invention.


REFERENCES:
patent: 3966230 (1976-06-01), Nicol
patent: 4145068 (1979-03-01), Toyomasu et al.
patent: 4479662 (1984-10-01), Defour et al.
patent: 4583755 (1986-04-01), Diekman et al.
patent: 4900049 (1990-02-01), Tseng
patent: 5129666 (1992-07-01), Lai
patent: 5609454 (1997-03-01), Lee
patent: 5842711 (1998-12-01), Legerot
patent: 5937496 (1999-08-01), Benoit et al.

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