Games using tangible projectile – Projectile – per se; part thereof or accessory therefor – Having loose internal element – containing or adapted to...
Reexamination Certificate
1999-07-08
2001-02-13
Wong, Steven (Department: 3711)
Games using tangible projectile
Projectile, per se; part thereof or accessory therefor
Having loose internal element, containing or adapted to...
C473S570000, C482S044000, C482S045000
Reexamination Certificate
active
06186914
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a game equipment, and more particularly to a wrist ball.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1-3
, a wrist ball
10
of the prior art comprises mainly a semispherical lower shell
11
of a transparent plastic material, a bracing ring
12
disposed in the inside of the top end of the lower shell
11
, a rotary member
13
provided with a center shaft
131
and a groove
132
extending along the outer periphery thereof and having a hole
133
. The rotary member
13
is received in the bracing ring
12
such that both ends of the center shaft
131
are fastened pivotally with the bracing ring
12
. A transparent upper shell
14
of a plastic material is joined with the top end of the lower shell
11
and is provided in the top thereof with a round opening
141
.
As shown in
FIG. 4
, a cord
20
has a head end
25
, which is inserted into the hole
133
of the rotary member
13
.
FIG. 7
, shows that the rotary member
13
can be pressed by a thumb of a player. In the meantime as further shows in
FIG. 7
, the cord
20
is wound in the groove
132
along the direction indicated by an arrow
24
such that only a small segment of the cord
20
remains outside. As shown in
FIG.6
, the wrist ball
10
can be held in one hand while the cord
20
is pulled forcefully with other hand along the direction indicated by an arrow
21
, so as to actuate the rotary member
13
to turn in the direction indicated by an arrow
22
as shown in FIG.
5
. The rotary member
13
and the bracing ring
12
are also actuated by the centrifugal force to turn in the direction indicated by an arrow
23
as shown in FIG.
9
. At this moment, the wrist ball
10
is held in a palm of a player in time, as shown in
FIG. 8
, such that the arm remains stationary, and that the palm is rotated on the “A” point serving as a fulcrum, so as to cause the wrist ball
10
to rotate clockwise along a circumferential track in an uninterrupted manner for testing a player's perseverance. As the wrist ball
10
is rotated forcefully, the rotational speed of the rotary member
13
accelerates to as fast as 80000 revolutions per minute. It must be noted here that wrist ball
10
buzzes at the time when the rotation of the rotary member
13
accelerates. As the palm stops turning, the rotary member
13
decelerates gradually to a complete stop.
Such a wrist ball
10
of the prior art as described above may present problems for a player, in that the upper shell
14
is provided at the top thereof with the round opening
141
through which the player is susceptible to injuries by the rotary member
13
in a high speed motion.
SUMMARY OF THE INVENTION
It is therefore the primary objective of the present invention to provide a wrist ball with a rotary member which is not exposed so as to protect a player of the wrist ball from injuries.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by an improved wrist ball comprising a lower shell, an upper shell, a bracing ring, and a rotary member. The bracing ring and the rotary member are housed in the lower shell which is joined with the upper shell having in the top thereof a round opening. The present invention is characterized in design in that the periphery of the rotary member has a groove which is provided with a first engaging portion. In addition, the round opening of the upper shell is provided with a cap which is in turn provided with two through holes through which a rod portion of a pull member is engaged with the rotary member in such a manner that the first engaging portion of the rotary member is engaged with a second engaging portion of the rod portion of the pull member, and that the rotary member is actuated by the pull member to rotate.
REFERENCES:
patent: 3237342 (1966-03-01), Bross
patent: 4684124 (1987-08-01), Escher
patent: 5399136 (1995-03-01), Bart
patent: 5800311 (1998-09-01), Chuang
patent: 6053846 (2000-04-01), Lin
Browdy and Neimark
Wong Steven
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