Description INLINESKATE WHEEL

Technical Field

[1] This invention is regarding the inlineskate wheels. At first we do 'injection mold' the plastic hub, and then 'insert mold' with the first product (Plastic Hub) and hard polyurethane, applying hard polyurethane on the center of the tire and edges that contact the road surface to excel running speed at straight line. After then we perform 'insert mold' with the second product and softer polyurethane, applying it on the lateral parts of the tire to prevent slipping by increasing the friction with the road surface during rounding and cornering. Background Art

[2] In inlineskate wheels, this invention makes the Plastic Hub (2) by injection molding in the first place and perform insert molding with the first product (Plastic Hub) and hard polyurethane (3) on the center (302) of the tire and edges (301) that contact the road surface to excel running speed at straight line. After then we do insert molding with the second product and softer polyurethane (4) on the both sides (401) of the tire. On the center (302) and edge (301) of the tire, polyurethane which has different material characteristics and degree of hardness is molded together to prevent slipping by increasing the friction with the road surface during rounding and cornering.

[3] On the hard polyurethane part of the tire, there are penetrated holes (501) in the center (302) of the tire to enhance the adhesiveness with softer polyurethane, to inject softer polyurethane and to remove the air bubbles composed during the molding process. On the edges (301) of the tire, there are depressions (502).

[4] Additionally, to remove the air bubbles composed during the molding process, it is molded in vacuum.

[5]

Disclosure of Invention

Technical Problem

[6] Conventional inlineskate wheels are composed of the hub made of plastic hub and tire center and edges made of polyurethane with single material and single degree of hardness. Most of them have grooves on the tire or have air tubes inside of the tire.

[7] Although you can excel the running speed when enhancing the hardening of the tire, it may bring accidents during rounding or cornering and when using soft tire, tire will be deteriorated very soon and diminish the running speed because of higher friction with road surface. Technical Solution

[8] To solve the aforementioned problems, this invention uses hard polyurethane (3) on the center of the tire and the edges contacting the road surface and use softer polyurethane (4) with higher friction with road surface on both sides of the tire to prevent slipping during rounding and cornering. By using different materials with different degree of hardness on the center and edges of the tire, and the lateral parts of the tire, it succeeds in providing inlineskate wheels with high safety and operability.

Advantageous Effects

[9] This invention enhances the functionality of the wheels and allows various color and design expression by using different materials with different degree of hardness on the center (302) and edges (301) and the both sides (401). [10] The effect of this invention is to provide inlineskate wheels considering the safety of the user by excelling the running speed and preventing slipping through the use of different materials (hard polyurethane and softer polyurethane) on center and edges, and the lateral parts of the tire.

Brief Description of the Drawings

[11] Figure 1 is a Perspective View of inlineskate wheels of this invention(l).

[12] Figure2 is a Perspective View of the conventional inlineskate wheels.

[13] Figure3 is a Sectional Figure of inlineskate wheels of this invention(l).

[14] Figure4 is a Perspective View of Plastic Hub (2) of this invention.

[15] Figure5 is a Perspective View of the secondary engineered product of this invention insert molded with the first injection molded plastic hub (2) and hard polyurethane(3). [16] Figureβ, and Figure7 are Sectional Figures.

[17] Figure8 is a Perspective View of the tertiary engineered product insert molded with the secondary product of this invention with and softer polyurethane (4). [18] Figure9, and FigurelO are Sectional Figures of the product.

[19] Figure 11 is a Sectional Figure of the secondary product of the invention which specially has depressions at the edge of hard polyurethane(3). [20] Figure 12, and Figure 13 are Sectional Figures of the tertiary product of this invention which is formed by molding the whole exterior part of the tire with soft polyurethane (4). [21] Figure 14 is a Dissembly Figure of this invention.

Best Mode for Carrying Out the Invention [22] In inlineskate wheels, this invention molds the Plastic Hub (2) through injection at first, and then performs insert molding with the hard polyurethane (3) and the first product (plastic hub(2)) at the center (302) of tire to speed up during running and edge

(301) that contacts the surface of the road, and then insert molds softer polyurethane

(4) with the second product on the center (302) of the tire and the edge (301) that

contacts the road surface to prevent slipping by increasing friction with road surface when rounding and cornering during running.

[23] On the hard polyurethane part of the tire, there are penetrated holes (501) on the center of the tire and depressions (502) at the edges of the tire to enhance the adhesiveness of polyurethane, to inject softer polyurethane and to remove the air bubbles composed during the molding process.

[24] Additionally, it is unique in that it is molded in vacuum to remove air bubbles during the molding process.

[25] The attached Figures will show you the details of the invention.

[26] Figure 1 is a Perspective View of inlineskate wheels of this invention(l).

[27] Figure2 is a Perspective View of the conventional inlineskate wheels.

[28] Figure3 is a Sectional Figure of inlineskate wheels of this invention(l).

[29] Figure4 is a Perspective View of Plastic Hub(2) of this invention.

[30] Figure5 is a Perspective View of the secondary engineered product of this invention insert molded with the first injection molded plastic hub (2) and hard polyurethane(3).

[31] Figureβ, and Figure7 are Sectional Figures.

[32]

[33] When molding the center (302) and the edges (301) of the tire with the Plastic

Hub(2), the degree of hardness of the hard polyurethane is Shore 84A to 9OA. As this part has high degree of hardness, it will excel the speed when running straight.

[34] In the hard polyurethane (3), softer polyurethane (4) will be inserted in the third molding. There will be many penetrated holes (501) to remove the air bubbles composed during molding and enhance the adhesiveness of different type polyurethane in the center (302).

[35] Figure8 is a Perspective View of the tertiary engineered product insert molded with the secondary product of this invention with and softer polyurethane (4).

[36] Figure9, and FigurelO are Sectional Figures of the product.

[37] At both lateral sides (401) of the tire, softer polyurethane (4) with hardness of Shore

81A to 83A to prevent slipping the wheels(l) to increase friction with the road surface during rounding and cornering.

[38] Figurel 1 is a Sectional Figure of the secondary product of the invention which specially has depressions at the edge of hard polyurethane (3).

[39] In the hard polyurethane (3) which is molded with Plastic Hub(2), softer polyurethane (4) will be inserted. To enhance the coherence of two different polyurethane by providing the path for the injection and air bubble removal, there will be penetrated holes (501) in the center and depressions (502) in the edges.

[40] Figure 12, and Figure 13 are Sectional Figures of the tertiary product of this invention which is formed by molding the whole exterior part of the tire with soft

polyurethane (4). [41] Figure 14 is a Dissembly Figure of this invention.