Hollow Plastic Ball

Abstract

A hollow plastic ball includes two semi-spherical shells combined together. Each of the two semi-spherical shells has a surface provided with a plurality of holes and has an inner circumferential face provided with a horizontal rib and a semi-circular vertical rib. Thus, each of the two semi-spherical shells is provided with the horizontal rib and the semi-circular vertical rib, so that the hollow plastic ball will not move or sway freely during flight. In addition, the horizontal rib and the vertical rib of each of the two semi-spherical shells reinforce the structural strength of the hollow plastic ball to prevent the hollow plastic ball from being deformed.

Claims

1. A hollow plastic ball comprising: two semi-spherical shells arranged symmetrically and combined together; wherein: each of the two semi-spherical shells has a surface provided with a plurality of holes; each of the two semi-spherical shells has an inner circumferential face provided with a horizontal rib and a semi-circular vertical rib; the horizontal rib of each of the two semi-spherical shells has an annular shape; the vertical rib of each of the two semi-spherical shells has a cruciform arcuate arrangement; the horizontal rib of each of the two semi-spherical shells is formed by residual plastic material of each of the two semi-spherical shells; and the horizontal ribs of the two semi-spherical shells are, combined integrally.

2. The hollow plastic ball of claim 1, wherein the two semi-spherical shells are molded integrally by ultrasonic welding.

3. The hollow plastic ball of claim 1, wherein the two semi-spherical shells are molded integrally by a bonding agent.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

[0010] FIG. 1 is a partially perspective cross-sectional view of a hollow plastic ball in accordance with the preferred embodiment of the present invention.

[0011] FIG. 2 is an exploded perspective view of the hollow plastic ball as shown in FIG. 1.

[0012] FIG. 3 is a perspective view of a semi-spherical shell of the hollow plastic ball in accordance with the preferred embodiment of the present invention.

[0013] FIG. 4 is a cross-sectional view of the hollow plastic ball as shown in FIG. 1.

[0014] FIG. 5 is a cross-sectional view of the hollow plastic ball taken along line D-D as shown in FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

[0015] Referring to FIGS. 1-5, a hollow plastic ball in accordance with the preferred embodiment of the present invention comprises two semi-spherical shells 10 arranged symmetrically and combined together. Each of the two semi-spherical shells 10 has a surface provided with a plurality of holes 11. Each of the two semi-spherical shells 10 has an inner circumferential face provided with a horizontal rib 12 and a semi-circular vertical rib 13. The horizontal rib 12 of each of the two semi-spherical shells 10 has an annular shape and presents an angle of 360 degrees. The vertical rib 13 of each of the two semi-spherical shells 10 has a cruciform arcuate arrangement and presents an angle of 180 degrees.

[0016] In fabrication, each of the two semi-spherical shells 10 is initially provided with the holes 11 and the semi-circular vertical rib 13. Then, the two semi-spherical shells 10 abut each other and are welded. Then, the two semi-spherical shells 10 are pressed by a pressing die to form the horizontal rib 12 on each of the two semi-spherical shells 10, so that the horizontal ribs 12 of the two semi-spherical shells 10 are heated and combined integrally. Then, the two semi-spherical shells 10 are cooled so that the two semi-spherical shells 10 are molded into the hollow plastic ball. In such a manner, the horizontal rib 12 of each of the two semi-spherical shells 10 is formed by residual plastic material of each of the two semi-spherical shells 10 during the molding process.

[0017] In the preferred embodiment of the present invention, the two semi-spherical shells 10 are molded integrally by heating connection. Alternatively, the two semi-spherical shells 10 are molded integrally by ultrasonic welding. Alternatively, the two semi-spherical shells 10 are molded integrally by a bonding agent.

[0018] Accordingly, each of the two semi-spherical shells 10 is provided with the horizontal rib 12 and the semi-circular vertical rib 13 to enhance the stability of the hollow plastic ball, so that when the hollow plastic ball is thrown out, the hollow plastic ball keeps a weight balance during flight and will not move or sway freely due to a deflection of the center of gravity, such that the hollow plastic ball can be maintained stably along a smooth movement trace, thereby facilitating the user manipulating the hollow plastic ball. In addition, the horizontal rib 12 and the vertical rib 13 of each of the two semi-spherical shells 10 reinforce the structural strength of the hollow plastic ball to prevent the hollow plastic ball from being deformed or distorted due to hitting or treading.

[0019] Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.