CA2755536A1 - Inline skate wheel - Google Patents

Abstract

A wheel for an inline skate that may reduce rolling friction and provide a wider rolling base giving more stability. The wheel comprises a hub for receiving an axle and a wheel body defining a circumference of the wheel. The wheel body comprises a circumferential surface extending along the circumference of the wheel. The circumferential surface comprises a first contact surface and a second contact surface for being in rolling contact with a skating surface on which the inline skate moves. The wheel body also comprises a receding surface extending from the first contact surface to the second contact surface and forming a recess between the first contact surface and the second contact surface.

Description

INLINE SKATE WHEEL

Field of the invention The present invention relates to inline skating and, more particularly, to a wheel for an inline skate.

Background lnline skates are a type of roller skate used for inline skating which comprises a plurality of wheels arranged in a single line.

A conventional wheel of an inline skate may have an essentially convex circumferential surface (e.g., a U-shaped surface or partly V-shaped and partly U-shaped surface) that contacts a skating surface on which the wheel rolls in a widthwise center of the wheel. The wheel's convex circumferential surface may present certain drawbacks in some cases in terms of friction and stability on the skating surface.

For there and other reasons, there is a need for improvements in inline skate wheels.

Summary of the invention As embodied and broadly described herein, according to an aspect of the invention, there is provided a wheel for an inline skate. The wheel comprises a hub for receiving an axle and a wheel body defining a circumference of the wheel. The wheel body comprises a circumferential surface extending along the circumference of the wheel. The circumferential surface comprises a first contact surface and a second contact surface for being in rolling contact with a skating surface on which the inline skate moves. The wheel body also comprises a receding surface extending from the first contact surface to the second contact surface and forming a recess between the first contact surface and the second contact surface.

These and other aspects of the invention will now become apparent to those of ordinary skill in the art upon review of the following description of embodiments of the invention in conjunction with the accompanying drawings.

Brief description of the drawings A detailed description of embodiments of the invention is provided herein below, by way of example only, with reference to the accompanying drawings, in which:

Figure 1 is a side view of an inline skate comprising a chassis that comprises a plurality of wheels in accordance with an embodiment of the invention;
Figure 2 is a front view of the chassis;

Figure 3 is a perspective view of a wheel of the chassis;

Figure 4 is a front view of the wheel;

Figure 5 is a side view of the wheel;

Figure 6 is a cross-sectional view of the wheel;
Figure 7 is an enlarged view of a portion of a cross-section of the wheel;

Figure 8 is an enlarged view of a portion of a cross-section of a wheel in accordance with another embodiment of the invention; and

2 Figure 9 is a perspective view of a wheel in accordance with another embodiment of the invention.

In the drawings, embodiments of the invention are illustrated by way of examples. It is to be expressly understood that the description and drawings are only for the purpose of illustration and are an aid for understanding. They are not intended to be a definition of the limits of the invention.

Detailed description of embodiments of the invention To facilitate the description, any reference numeral designating an element in one figure will designate the same element if used in any other figures. In describing the embodiments, specific terminology is resorted to for the sake of clarity but the invention is not intended to be limited to the specific terms so selected, and it is understood that each specific term comprises all equivalents.

Unless otherwise indicated, the drawings are intended to be read together with the specification, and are to be considered a portion of the entire written description of this invention. As used in the following description, the terms "horizontal", "vertical", "left", "right", "up", "down" and the like, as well as adjectival and adverbial derivatives thereof (e.g., "horizontally", "rightwardly", "upwardly", "radially", etc.), simply refer to the orientation of the illustrated structure as the particular drawing figure faces the reader. Similarly, the terms "inwardly," "outwardly" and "radially" generally refer to the orientation of a surface relative to its axis of elongation, or axis of rotation, as appropriate.

Figure 1 shows an inline skate 10 for use by a skater in accordance with an embodiment of the invention. The inline skate 10 comprises a skate boot 12 and a chassis 14 under the skate boot 12. The chassis 14 comprises a plurality of wheels 161-164 arranged inline. In this embodiment, the inline skate 10 is a roller hockey inline skate used for playing roller hockey. In other embodiments, the inline skate 10

3 may be another type of inline skate used for speed skating, recreational skating or other skating activities.

The skate boot 12 defines a cavity 20 for receiving a foot of the skater. More particularly, in this embodiment, the skate boot 12 includes a heel counter portion 80 which cups around the skater's heel, an ankle support 82 enclosing a substantial portion of the skater's ankle, a lateral quarter panel 84 and a medial quarter panel 86 extending along each side of the skater's foot and ankle, and a toe covering portion 88.
The chassis 14 is secured on an underside 102 of the skate boot 12. For example, in some embodiments, the chassis 14 may be fastened to the skate boot 12 via fasteners (e.g., screws, bolts, nuts, rivets, etc.). The chassis 14 may be secured under the skate boot 12 in various other ways in other embodiments (e.g., using an adhesive).

The chassis 14 comprises a frame 30 supporting the wheels 161-164. In this embodiment, as shown in Figures 1 and 2, the frame 30 comprises two longitudinal members 901, 902 below the skate boot 12. The wheels 161-164 are disposed between the longitudinal members 901, 902. The longitudinal members 901, 902 are interconnected by a transversal member 92 at their top.

In this example, the longitudinal members 901, 902 are connected to front and rear pedestals 1001 and 1002 which connect to the underside 102 of the skate boot 12.
For example, in some embodiments, the front and rear pedestals 1061, 1062 and the skate boot 12 may be affixed together with fasteners (e.g., screws, bolts, nuts, rivets, etc.). The frame 30 may be configured and/or attached to the skate boot 12 in various other ways in other embodiments.

In one embodiment, the frame 30 may be formed as one piece. For instance, in some cases, the frame 30 may be cast or machined from metallic material (e.g.,

4 aluminum or steel). In another embodiment, different parts of the frame 30 may be formed separately and connected together via welding or any suitable manufacturing technique. The frame 30 may be made using various other materials and/or manufacturing processes in other embodiments.
The wheels 161-164 roll on a skating surface 60 on which the inline skate 10 moves when the skater skates. The skating surface 60 may take on various forms in various cases. For example, in this embodiment in which the inline skate 10 is a roller hockey inline skate, the skating surface 60 may be a polymeric surface, a wooden surface or a treated cement surface. As another example, in other embodiments, the skating surface 60 may be a ground surface (e.g., asphalt).

The wheels 161-164 are mounted to the frame 30 via holes that receive the wheels' axles. While in this embodiment the chassis 14 comprises four wheels 161-164, the chassis 14 can be modified in order to accommodate a different number of wheels in other embodiments. The chassis 14 may also be designed for receiving wheels of different outer diameters (e.g., two rear wheels each having a greater diameter than the two front wheels).

With additional reference to Figures 3 to 7, each wheel 16x comprises a first lateral surface 42, a second lateral surface 44, and a circumferential surface 46. The first lateral surface 42 and the second lateral surface 44 are opposite one another and define a width of the wheel 16. The circumferential surface 46 extends between the first lateral surface 42 and the second lateral surface 44 along a circumference of the wheel 16x. The circumferential surface 46 is in rolling contact with the skating surface 60 when the skater skates.

More particularly, the wheel 16x comprises a hub 50 and a wheel body 52. The hub 50 and the wheel body 52 form at least part of the first lateral surface 42 and the second lateral surface 44, while the wheel body 52 forms the circumferential surface 46.

5 The hub 50 is configured to receive an axle of the wheel 16x. To that end, the hub 50 comprises an opening 62 through which extends the axle of the wheel 16x. For example, in some embodiments, the opening 62 of the hub 50 may house a bearing 74 and a spacer 76 through which the axle of the wheel 16x is to be received.

The hub 50 may be configured in any suitable way. For example, in some embodiments, the hub 50 may be generally annular and include a circumferential projection 64 surrounded by the wheel body 52. The hub 50 may include a plurality of spokes or a plurality of voids or may be full without any spoke or void.
The hub 50 may have any other suitable configuration in other embodiments.

The hub 50 may be made of any suitable material. For example, in some embodiments, the hub 50 may be made of polymeric material (e.g., nylon) or metallic material (e.g., aluminum).

In this embodiment, the hub 50 is manufactured (e.g., by molding and/or machining) separately from and embedded into the wheel body 52. For instance, in one example of implementation, the hub 50 may be manufactured separately from the wheel body 52 then inserted in a central void of the wheel body 52. In another example of implementation, the wheel body 52 may be molded over the hub 52. In other embodiments, the hub 50 may be formed integrally with the wheel body 52.

The wheel body 52 extends radially from the hub 50 and defines the circumference of the wheel 16x. More particularly, the wheel body 52 forms the circumferential surface 46 of the wheel 16x. In this embodiment, the circumferential surface comprises a first contact surface 541 and a second contact surface 542 for being in rolling contact with the skating surface 60 on which the inline skate 10 moves. The wheel body 52 also comprises a receding surface 58 extending from the first contact surface 541 to the second contact surface 542 and forming a recess 66 between these contact surfaces 541, 542. The contact surfaces 541, 542 and the recess

6 reduce rolling friction and provide a wider rolling base which gives more stability to the skater.

The contact surfaces 541, 542 and the receding surface 58, including the recess 66 it forms, may be configured in various ways.

For example, in the embodiment shown in Figures 3 to 7, the recess 66 is a groove extending along at least part of the circumference of the wheel 16x. More particularly, in this case, the groove 66 extends along an entirety of the circumference of the wheel 16x. Also, in this embodiment, the recess 66 is formed such that its receding surface 58 extends substantially perpendicularly to at least one, in this case both, of the contact surfaces 541, 542. Furthermore, in this embodiment, the receding surface 58 is generally cylindrical at a bottom 72 of the recess 66 such that it appears generally flat in a cross-section of the wheel 16x (as shown in Figure 6). The recess 66, the receding surface 58 and the contact surfaces 541, 542 may have various other shapes in other embodiments (e.g., the receding surface 58 may be curved at the bottom 72 of the recess 66 such that it appears concave, convex or otherwise curved in a cross-section of the wheel 16x, instead of being generally flat as shown in Figure 6).
The recess 66 has a width W in a widthwise direction of the wheel 16x. For example, in some embodiments, the width W of the recess 66 may be at least 1 mm, in some cases at least 2 mm, in some cases at least 3 mm, and in some cases even more (e.g., up to 10 mm). The width W of the recess 66 may take on any other suitable value in other embodiments.

The recess 66 has a depth D in a radial direction of the wheel 16. For example, in some embodiments, the depth D of the recess 66 may be at least 0.5 mm, in some cases at least 0.75 mm, in some cases at least 1 mm, in some cases at least 2 mm, and in some cases even more (e.g., up to 5 mm). The depth D of the recess 66 may take on any other suitable value in other embodiments.

7 For example, in some embodiments, a ratio W/D of the width W of the recess 66 to the depth D of the recess 66 may be between 0.2 and 20, in some cases between 0.5 and 10, and in some cases between 1 and 5. The ratio W/D of the width W of the recess 66 to the depth D of the recess 66 may take on any other suitable value in other embodiments.

The recess 66 may be created in various manners. For example, in one embodiment, the wheel body 52 may be molded and the recess 66 may be created by cutting it after the wheel body 52 has been molded. In another embodiment, the wheel body 52 may be molded and the recess 66 may be created during molding of the wheel body 52 using a suitably shaped mold.

The wheel body 52 may be made of any suitable material. For example, in this embodiment, the wheel body 52, including its circumferential surface 46, includes polymeric material. More particularly, in this embodiment, the wheel body 52 is a one-piece polymeric body that is continuous from the first lateral surface 42 to the second lateral surface 44 and from the hub 50 to the circumferential surface 46. For instance, in one embodiment, the polymeric material of the wheel body 52 may comprise polyurethane.

A hardness of the material of the circumferential surface 46 of the wheel body can have any suitable value. For example, in some embodiments, the hardness of the material of the circumferential surface 46 of the wheel body 52 may be at least 74A durometers (i.e., on the Shore A durometer scale) and in some cases between 74A durometers and 84A durometers. The hardness of the material of the circumferential surface 46 may take on any other suitable value in other embodiments.

The outer diameter of the wheel body 52 may have any suitable value. For example, in some embodiments, the outer diameter of the wheel body 52 may be between 59

8 mm and 80 mm. The outer diameter of the wheel body 52 may take on any other suitable value in other embodiments.

Although the wheel 16x is configured in a particular manner in embodiments considered above, the wheel 16x may be configured in various other manners in other embodiments.

For example, in another embodiment, as shown in Figure 8, the contact surfaces 541, 542 may be generally flat in the widthwise direction of the wheel 16x to provide an even wider rolling base and an increased stability to the skater. A width F
of general flatness of each of the contact surfaces 541, 542 can have any suitable value. For instance, in some embodiments, the width F may be at least 1 mm, in some cases at least 1.5 mm, in some cases at least 2 mm, and in some cases even more (e.g., up to 4 mm). The width F may take on any other suitable value in other embodiments.

As another example, in other embodiments, the recess 66 may be a groove that extends along less than all the circumference of the wheel 16x. For instance, in some cases, the groove 66 may extend along at least one-quarter, at least one-third, or at least one half of the circumference of the wheel 16x without extending completely around the wheel 16x.

As yet another example, instead of including a single recess like the recess 66, in another embodiment, as shown in Figure 9, the wheel body 52 may include a plurality of recesses 1661-166N spaced apart along the circumference of the wheel 16x.

The above description of the embodiments should not be interpreted in a limiting manner since other variations, modifications and refinements are possible within the scope of the present invention. The scope of the invention is defined in the appended claims and their equivalents.

9

Claims (26)

1. A wheel for an inline skate, the wheel comprising:
(a) a hub for receiving an axle; and (b) a wheel body defining a circumference of the wheel, the wheel body comprising:
a circumferential surface extending along the circumference of the wheel, the circumferential surface comprising a first contact surface and a second contact surface for being in rolling contact with a skating surface on which the inline skate moves; and (ii) a receding surface extending from the first contact surface to the second contact surface and forming a recess between the first contact surface and the second contact surface.

2. The wheel defined in claim 1, wherein the recess is a groove extending along at least part of the circumference of the wheel.

3. The wheel defined in claim 2, wherein the groove extends along an entirety of the circumference of the wheel.

4. The wheel defined in any one of claims 1 to 3, wherein the recess has a width in a widthwise direction of the wheel of at least 1 mm.

5. The wheel defined in claim 4, wherein the width of the recess is at least mm.

6. The wheel defined in claim 5, wherein the width of the recess is at least mm.

7. The wheel defined in any one of claims 1 to 6, wherein the recess has a depth of at least 0.5 mm.

8. The wheel defined in claim 7, wherein the depth of the recess is at least 0.75 mm.

9. The wheel defined in claim 8, wherein the depth of the recess is at least mm.

10. The wheel defined in claim 1, wherein the recess has a width in a widthwise direction of the wheel and a depth in a radial direction of the wheel, a ratio of the width of the recess to the depth of the recess being between 0.2 and 20.

11. The wheel defined in claim 10, wherein the ratio of the width of the recess to the depth of the recess is between 0.5 and 10.

12. The wheel defined in claim 11, wherein the ratio of the width of the recess to the depth of the recess is between 1 and 5.

13. The wheel defined in any one of claims 1 to 12, wherein the receding surface extends substantially perpendicularly from at least one of the first contact surface and the second contact surface.

14. The wheel defined in any one of claims 1 to 12, wherein the receding surface is generally cylindrical at a bottom of the recess such that the receding surface appears generally flat in a cross-sectional view of the wheel.

15. The wheel defined in any one of claims 1 to 14, wherein each of the first contact surface and the second contact surface includes polymeric material.

16. The wheel defined in claim 15, wherein the polymeric material comprises polyurethane.

17. The wheel defined in any one of claims 1 to 16, wherein the wheel body is molded and the recess is molded during molding of the wheel body.

18. The wheel defined in any one of claims 1 to 17, wherein the wheel body is molded and the recess is cut into the wheel body after molding of the wheel body.

19. The wheel defined in any one of claims 1 to 18, wherein the hub is embedded in the wheel body.

20. The wheel defined in any one of claims 1 to 19, wherein each of the first contact surface and the second contact surface has a hardness of at least 74A durometers.

21. The wheel defined in claim 20, wherein the hardness is between 74A
durometers and 84A durometers.

22. The wheel defined in any one of claims 1 to 21, wherein each of the first contact surface and the second contact surface is generally flat in a widthwise direction of the wheel.

23. The wheel defined in claim 22, wherein a width of general flatness of each of the first contact surface and the second contact surface is at least 1 mm.

24. The wheel defined in claim 23, wherein the width of general flatness is at least 1.5 mm.

25. The wheel defined in claim 24, wherein the width of general flatness is at least 2 mm.

26. An inline chassis for an inline skate, the inline chassis comprising a wheel as defined in any one of claims 1 to 25.