AU2005100340A4

AU2005100340A4 - Wheel structure

Info

Publication number: AU2005100340A4
Application number: AU2005100340A
Authority: AU
Inventors: Ting-Hsing Chen
Original assignee: Far Great Plastics Industrial Co Ltd
Current assignee: Far Great Plastics Industrial Co Ltd
Priority date: 2005-04-21
Filing date: 2005-04-21
Publication date: 2005-05-19
Anticipated expiration: 2013-04-21

Description

F

0 0 <i P/00/012 Regulation 3.2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE SPECIFICATION INNOVATION PATENT Invention Title: "WHEEL

STRUCTURE"

The following statement is a full description of this invention, including the best method of performing it known to us:

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S TITLE: WHEEL STRUCTURE

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BACKGROUND OF THE INVENTION Field of the Invention This invention relates to a wheel structure applied to playing or sporting vehicles such as scooters, tricycles, bicycles, skateboards, roller S skates, training cycles, hand-pulling suitcases, hand carts, shopping carts, toy carts or balancing wheels, and more particularly to a wheel having Stwo auxiliary sections at respective sides of a main wheel body to ci increase contact surfaces of the wheel with the ground.

Description of the Prior Art Most scooters, tricycles or bicycles for children are mounted with wheels to a cart as shown in Figure 8, to facilitate movement of the cart When the cart makes a turn, it is difficult to control turning movement because the wheels are small in size. Sometimes the cart may even turnover if the turn is made too wide.

In order to correct the shortcoming, an egg-shaped wheel was derived, as shown in Figure 9, to provide the stability when making turns.

The egg-shaped wheel has its center surface (Cl) in touch with the ground constantly. When the cart is turning, due to the centrifugal force, the cart leans towards one side, and so does the egg-shaped wheel The egg-shaped wheel will lean with its arc surface (C2) to get in touch with the ground, as shown in Figure 10, which provides a stable position to the cart However, if the turning angle is too big, the cart still may encounter the possibility of overturning.

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In order to overcome the above-mentioned shortcoming, a wheel (D)

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o mounted with auxiliary wheels (DI) is derived later, as shown in Figure 11, to support the wheel of the cart in turning. However, the auxiliary wheels (DI) increase the cost of manufacture and assembly, i 5 and it easily malfunctions.

o SUMMARY OF THE INVENTION o It is the primary objective of the present invention to provide a wheel 0 structure, which provides with more contact surfaces for a cart to get in 0 Stouch with the ground and more stable to riders.

It is another objective of the present invention to provide a wheel structure, which uses less parts to save time in assembly and has less noise.

It is a further objective of the present invention to provide a wheel structure, which comprises a main wheel body and auxiliary sections formed integrally by blowing molding or injection molding. The wheel is provided with an outer tire formed in an injection or casting method or mounted to the wheel, thus it is cost effectiveness BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention; FIG. 2 is a front view of the first embodiment of the present invention in a riding status; FIG. 3 is a front view of the first embodiment of the present invention in a turning status; FIG. 4 is a front view of a second embodiment of the present invention; FIG. 5 is a front view of a third embodiment of the present invention; FIG. 6 is a front view of a fourth embodiment of the present invention; FIG. 7 is a cross-sectional view of a fifth embodiment of the present invention; FIG. 8 is a side view of a conventional wheel; n FIG. 9 is a front view of another conventional wheel; 0 FIG. 10 is a front view of FIG. 9 in a turning status; and 0 0FIG. 11 is view of a conventional wheel with auxiliary wheels.

c',I I DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 0 As shown in Figure 1, a first embodiment of the present invention comprises a wheel having a main wheel body (11) at the center portion for direct contact with the ground. The main wheel body (11) has its two sides extending to form a pair of extension sections (12) to get in touch with the ground when making turns. Each extension section 8 (12) extends outwardly to form an auxiliary section The main wheel body (11) of the wheel has a larger outer diameter than the Souter diameters of the auxiliary sections (13) to increase the contact i 10 surfaces with the ground when making turns. The auxiliary sections (13) are integral to the main wheel body (11).

To operate the present invention, as shown in Figures 2 and 3, the wheel is pivotally connected to a cart When the cart is rolling in a straight direction, the main wheel body (11) of the wheel (1) remains contact with the ground. When the cart makes a turn, due to the centrifugal force, the wheel will incline with the cart which makes either extension section (12) touch the ground at this moment.

The auxiliary section (13) is also in touch with the ground to increase contact surface between the wheel and the ground to provide a steady riding status when the turning angle is too big.

A second embodiment of the present invention comprises a wheel (lA) as shown in Figure 4. The wheel (lA) has a main wheel body (1 lA) at the center portion, a pair of extension sections (12A) extending from respective sides of the main wheel body (11 and a pair of auxiliary sections (13A) coaxially extending from the extension sections (12A), respectively. The main wheel body (1 I A) of the wheel (1A) has a larger outer diameter than the outer diameters of the auxiliary sections (13A).

I The extension sections (12A) are spaced from the auxiliary sections 0 o (13A).

A third embodiment of the present invention comprises a wheel (1IB), as shown in FIG. 5. The wheel (IB) comprises a main wheel body (11B) at the center portion to be in touch with the ground when the cart is rolling. The main wheel body (1 iB) has its two sides extending outwardly to form a pair of extension sections (12B) and a pair of auxiliary sections (13B) coaxially extending from the extension sections S(12B), respectively. The main wheel body (11B) of the wheel (1B) has a 0 NI 10 larger outer diameter than the outer diameters of the auxiliary sections (13B). The extension sections (12B) are spaced from the auxiliary sections (13B).

A fourth embodiment of the present invention comprises a wheel (1C), as shown in Figure. 6. The wheel (1C) comprises a main wheel body (11C) at the center portion to get in touch with the ground when the cart is rolling. The main wheel body (I C) has its two sides extending outwardly to form a pair of extension sections (12C) and a pair of auxiliary sections (13C) coaxially extending from the extension sections (12C), respectively. The main wheel body 11C) of the wheel (I C) has a larger outer diameter than the outer diameters of the auxiliary sections (13C). The extension sections (12C) are spaced from the auxiliary sections (13C).

A fifth embodiment of the present invention comprises a wheel (1D), as shown in Figure 7. The wheel (ID) comprises a main wheel body (11 D) at the center portion to get in touch with the ground when the cart is rolling. The main wheel body (1lD) has its two sides extending outwardly to form a pair of extension sections (12D) and a pair of It auxiliary sections (13D) coaxially extending from the extension sections (12D), respectively. The main wheel body (I 1D) of the wheel (1D) has Sa larger outer diameter than the outer diameters of the auxiliary sections (13D). The extension sections (12D) are spaced from the auxiliary ,I 5 sections (13D).

Furthermore, the main wheel body (1 ID) is provided with an outer tire (1 10D) made in a different material. The auxiliary sections (13D) are also provided with outer tires (130D) made in a different material. Both the outer tires 110D) and (130D) may be formed in an injection or casting method or mounted directly to the wheel. Both the outer tires (1 10D) and (130D) have larger outer diameters than the outer diameters of the main wheel body (1 ID) and the auxiliary sections (13D).

Claims

3. The wheel structure, as recited in claim 1, wherein said main wheel body and said auxiliary sections are provided with outer tires made in a different material.
4. The wheel structure, as recited in claim 3, wherein said outer tires are formed in an injection method. The wheel structure, as recited in claim 3, wherein said outer tires are formed in a casting method.
6. The wheel structure, as recited in claim 3, wherein said outer tires are mounted directly to the wheel. DATED this twenty-first day of April 2005. FAR GREAT PLASTICS INDUSTRIAL O3 LTD By its Patent Attorneys FISHER ADAMS KELLY