Land vehicles – Skates – Wheeled skate
Reexamination Certificate
2001-03-09
2002-12-03
Johnson, Brian L. (Department: 3618)
Land vehicles
Skates
Wheeled skate
C280S011223, C280S011270, C301S005305
Reexamination Certificate
active
06488289
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a simply structured bi-functional roller skate which has a shoe that can be converted from a roller skate into a common shoe, the roller skate and common shoe being referred to herein as shoe embodiments. In each shoe embodiment, the shoe is provided with a front securing seat which is a tubular device with a forwardly extended plate, and a rear securing seat which is a tubular device with a backwardly extended plate. Both the front and rear securing seats are embedded at the front end and the rear end of each shoe embodiment respectively. Each tubular device of the front and rear securing seats is in alignment with an engagement hole so as to permit a first and a second wheel axle each having a proper length to be led therethrough at the front and rear end of the shoe embodiment. Each wheel axle has a knob-ended locking screw at one end and an internally threaded section at the other end so as to permit the knob-ended locking screw to be secured to the end of each wheel axle after roller wheels are mounted to the wheel axles respectively. The brake block has a threaded rod so as to make the brake block engage an internally threaded hole defined at the front securing seat.
The present invention provides an improved bi-functional roller skate which can be converted into a common shoe for wearing as a walking means and be easily transformed into a roller skate for skating purposes so as to permit a user to move with speed and ease. It has shorter roller-mounted axles so that accidental collision and damage of the axles can be effectively prevented in use, resulting in longer durability in operation.
Referring to
FIG. 1
, a prior art bi-functional roller skate has a pair of shoe embodiments
80
. Each shoe embodiment
80
is equipped with a pair of wheel axles
81
, two springs
82
, two locking pins
84
and four roller wheels
85
. A pair of axle tubes
801
embedded at the front and rear end of each shoe embodiment
80
match with the lengths of the wheel axles
81
respectively. Each wheel axle
81
has a bulged head at one end
811
and a bifurcated end
812
having a pin hole
813
defined thereon so as to permit a positioning plate
83
whose thickness matches with the width of the bifurcated end
812
to be retained in the bifurcated end
812
by the pin
84
. Four roller wheels
85
each having a bearing
852
at its central axle hole
851
are mounted onto the wheel axles
81
and are retained in position by way of the positioning plate
83
which is locked in place by the pin
84
. The spring
82
is in abutment against the bulged head and forces the wheel axle
81
to separate from the shoe body in nature so as to make the positioning plate
83
be firmly retained in place against a right roller wheel
85
.
Such a prior art bi-functional roller skate has the following disadvantages in practical use:
1. The wheel axles
81
are easily disengaged from the shoe embodiment as a result of failure of the spring
82
due to long period of use.
2. The positioning plate
83
is easily disengaged from the wheel axle
81
when the bulged head
811
of the wheel axle
81
accidentally comes into collision against a foreign object, forcing the spring
82
to be compressed and let the positioning plate
83
free.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to provide an improved bi-functional roller skate which is provided with a wheel axle having an internally threaded end so as to permit a knob-ended screw to be readily secured to the end of the wheel axle with roller wheels to be safely and firmly mounted to the sides of a roller skate shoe embodiment and easily dismounted for maintenance.
Another object of the present invention is to provide an improved bi-functional roller skate which is provided with wheel axles that are short enough and protected by knob-ended covers so as to protect the wheel axles from accidental damage during a collision, to prevent separation of the roller wheels, and to make the appearance of the roller skate is more appealing to users' eyes.
REFERENCES:
patent: 3387852 (1968-06-01), Sarro
patent: 4596396 (1986-06-01), Merbler
patent: 5372383 (1994-12-01), Kubierschky
patent: 5398970 (1995-03-01), Tucky
patent: 5441286 (1995-08-01), Pozzobon
patent: 5462295 (1995-10-01), Seltzer
patent: 5511824 (1996-04-01), Kim
patent: 5772220 (1998-06-01), Gaster
patent: 5800022 (1998-09-01), Del Rosario
patent: 5964537 (1999-10-01), Hill, Jr.
patent: 6213480 (2001-04-01), Rodriguez
patent: 6354609 (2002-03-01), Chen et al.
Hsiao Chun-Chung
Huang Hung-Lung
Lee Jong-Ming
Bacon & Thomas
Johnson Brian L.
Restifo Jeffrey
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