Machine element or mechanism – Elements – Cranks and pedals
Reexamination Certificate
2000-02-04
2001-10-23
Bucci, David A. (Department: 3682)
Machine element or mechanism
Elements
Cranks and pedals
C280S259000
Reexamination Certificate
active
06305243
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a bicycle, and more particularly to a crank arm of the bicycle.
BACKGROUND OF THE INVENTION
This inventor of the present invention discloses in the U.S. Pat. No. 5,979,923 a bicycle crank arm which is enclosed in a body of carbon fiber, as shown in FIG.
1
. The bicycle crank arm is light in weight and strong in structural strength, nevertheless the device can be improved further.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a bicycle crank arm which is better than the prior art bicycle crank arm described above in terms of quality and manufacturing economy.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a bicycle crank arm comprising a main body, an axle fastening member, and a pedal fastening member. The main body is provided at both ends thereof with a male threaded portion. The axle fastening member and the pedal fastening member are respectively provided with a female threaded portion engageable with the male threaded portions of the main body. The axle fastening member and the pedal fastening member are provided in the external surface thereof with a plurality of protrusions which are intended to fix with a body which is made of carbon fiber and is used to enclose the main body, the axle fastening member, and the pedal fastening member.
The foregoing objective, features and functions of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 867668 (1907-10-01), Miller
patent: 2350468 (1944-06-01), Kraeft
patent: 3648542 (1972-03-01), Perotti et al.
patent: 5010785 (1991-04-01), Romero
patent: 5609070 (1997-03-01), Lin et al.
patent: 5941135 (1999-08-01), Schlanger
patent: 270388 A (1910-11-01), None
patent: 417313 (1910-11-01), None
patent: 16499 (1897-01-01), None
patent: 22058 (1901-01-01), None
Bacon & Thomas PLLC
Bucci David A.
Kim Chong H.
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