Patent Application
20070096542
1. Field of the Invention
This invention relates generally to the field of roller skate and, more particularly, to a wheel and tire combination for use on skates equipped with large diameter, canted wheels.
2. Background
Roller skating has long been a popular sport. Various types of skates have been used over the years. At present, in-line skates are particularly popular. Such skates, however, are poorly suited for other than smoothly paved surfaces.
Skates with large diameter wheels have been proposed for use on unpaved surfaces. One example of such a skate is disclosed in U.S. Pat. No. 3,885,804 issued to Cudmore. This skate has two large wheels of equal diameter that are canted at an angle of approximately 30°. Improved skates with large diameter, canted wheels are disclosed in U.S. Pat. Nos. 5,951,028 and 6,273,437 and 6,443,464, all of which are issued to Lovitt et al.
The present invention is directed to a wheel and tire combination that is particularly adapted for use with a skate having large diameter, canted wheels. In one embodiment, the wheel rim has a generally “L”-shaped cross-section and a tire disposed within the notch of the “L”. The tire has a rounded contour and, when the wheel is canted, pressure of the ground against the tire forces the tire into the notch of the “L”. The tire may be molded in place on the rim of the wheel or may be molded as a separate part that is stretched over the rim of the wheel. In another embodiment, the rim has a channel-shaped cross-section. This embodiment is particularly adapted for use with air-filled or foam tires.
In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods and devices are omitted so as to not obscure the description of the present invention with unnecessary detail.
In a particular embodiment, wheel 10 may be cast aluminum. However, other materials and manufacturing processes may be used, and the invention is not limited in this regard. Wheel 10 may also be machined from a billet of aluminum or other suitable material. Furthermore, wheel 10 may be molded using a plastic or composite material. The hub, rim and connecting portions may be cast or molded integrally or may comprise separate components that are assembled into a finished wheel. Connecting portion 16 may comprise individual spokes connecting the hub to the rim. Embodiments of the invention can be used with or without the mechanical/structural interlocking systems that are typically found on in-line skate wheels.
Tire 20 is disposed within the notch of “L”-shaped rim 14. It will be noted that tire 20 has an outer contour extending outward from the notch beyond an imaginary line denoted as B-B joining the outermost edges of legs 24 and 25. Tire 20 has a smoothly rounded contour extending between the outer edges of the two legs; however, other tire contours may be utilized. The tire may be formed of urethane that is molded in place on rim 14. Alternatively tire 20 may be molded as an individual component and then “snapped” into place on rim 14.
Still referring to
It will be recognized that the above-described invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the disclosure. Thus, it is understood that the invention is not to be limited by the foregoing illustrative details, but rather is to be defined by the appended claims.
