Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
1998-11-02
2001-02-27
Swann, J. J. (Department: 3611)
Land vehicles
Wheeled
Occupant propelled type
C074S564000
Reexamination Certificate
active
06193255
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an acrobatic bicycle, and more particularly to a tread rod assembly affixed to the acrobatic bicycle.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a bicycle tread rod
30
of the prior art is fastened with a front fork
10
of the bicycle and is intended for use in allowing a person to step on it for performing an acrobatic feat.The front fork
10
is provided at the lower end thereof with a horizontal threaded tube
20
having an inner threaded hole
201
.The tread rod
30
is provided with an outer threaded portion
301
which is engaged with the inner threaded hole
201
.
Such a tread rod of the prior art as described above is defective in design in that the outer threaded portion
301
of the tread rod
30
is vulnerable to damage or even severance caused by the stress that is concentrated at the portion indicated by an arrow “A” at such time when a person steps on the tread rod
30
.In addition,it is rather difficult to take the severed outer threaded portion
301
out of the inner threaded hole
201
.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide bicycle with an improved tread rod free from the drawbacks of the prior art tread rod.
In keeping with the principle of the present invention,the foregoing objective of the present invention is attained by the bicycle tread rod consisting of a tubular rod having a closed end and an open end.The closed end of the tread rod is fastened with a horizontal connection tube of the bicycle front fork in conjunction with a bolt and a nut.
REFERENCES:
patent: 450907 (1891-04-01), Blakely
patent: 615533 (1898-12-01), Demory
patent: 625368 (1899-05-01), Thompson
patent: 3484829 (1969-12-01), Erickson
patent: 3800396 (1974-04-01), Puchner
patent: 4771651 (1988-09-01), Haro
patent: 5482207 (1996-01-01), Lin
patent: 236416 (1925-07-01), None
Bottorff Christopher
Liauh W. Wayne
Swann J. J.
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