Land vehicles – Skates – Wheeled skate
Reexamination Certificate
2003-04-07
2004-12-28
Ellis, Christopher P. (Department: 3618)
Land vehicles
Skates
Wheeled skate
C280S011223
Reexamination Certificate
active
06834866
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a roller skate frame, more particularly to a roller skate frame with reinforcing ribs.
2. Description of the Related Art
FIG. 1
illustrates a conventional roller skate frame
11
of a roller skate
1
disclosed in U.S. Pat. No. 6,189,898. The roller skate frame
11
includes a shoe-mounting plate
111
that is adapted to receive a skater's shoe (not shown), and a pair of parallel wheel-mounting plates
112
extending downwardly from the shoe-mounting plate
111
. A plurality of wheels
12
(only one is shown) are disposed between and are mounted rotatably on free ends of the wheel-mounting plates
112
through respective axles
114
that extend through the wheel-mounting plates
112
. A plurality of screw nuts
115
and washers
116
are used for fastening respective axles
114
to the free ends of the wheel-mounting plates
112
. A U-shaped reinforcing plate
113
is connected to the roller skate frame
11
to enhance mechanical strength of the latter.
The aforesaid conventional roller skate frame
11
is disadvantageous in that the free ends of the wheel-mounting plate
112
tend to distort during cornering (as indicated by the imaginary lines shown in FIG.
1
), thereby resulting in improper alignment of each wheel
12
relative to the wheel-mounting plates
112
, which, in turn, results in undesired friction between the wheels
12
and the wheel-mounting plates
112
and severe wearing of the washers
116
, the axles
114
and the wheel-mounting plates
112
.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a roller skate frame that is capable of overcoming the aforesaid drawbacks of the prior art.
According to the present invention, there is provided a roller skate frame that comprises: a wheel-mounting plate having top and bottom ends, the wheel-mounting plate being formed with a plurality of first through-holes adjacent to the bottom end, each of the first through-holes extending in a transverse direction relative to the wheel-mounting plate; a shoe-mounting plate adapted to receive an article of footwear thereon, projecting in the transverse direction from the top end of the wheel-mounting plate, and disposed at one side of the wheel-mounting plate that is adapted to be opposite to the wheel; a plurality of spaced apart wheel-mounting protrusions, each of which projects from a periphery of a respective one of the first through-holes in the transverse direction, each of which is disposed at the side of the wheel-mounting plate, and each of which defines a second through-hole that extends from a respective one of the first through-holes in the transverse direction; and a plurality of first reinforcing ribs, each of which projects from the bottom end of the wheel-mounting plate in the transverse direction and extends between and interconnects two adjacent ones of the protrusions.
REFERENCES:
patent: 4711458 (1987-12-01), Shim
patent: 5251920 (1993-10-01), McHale
patent: 5765841 (1998-06-01), Johnson et al.
patent: 5813678 (1998-09-01), Robins
patent: 6042124 (2000-03-01), Cheatham et al.
patent: 2001/0040351 (2001-11-01), Cheatham et al.
patent: 2004/0094918 (2004-05-01), Egeraat
patent: 2004/0145129 (2004-07-01), Polanco
Ellis Christopher P.
PC-Vane Sportartikel GmbH
Shriver J. Allen
Whyte Hirschboeck Dudek SC
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