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  Truck racing tireUSPTO Application #: 20060231181Title: Truck racing tire Abstract: The invention is directed to a pneumatic radial ply truck tire having a tread with a tread depth D, at least two circumferential grooves dividing the tread into at least a first shoulder circumferential rib, an intermediary circumferential rib, and a second shoulder circumferential rib, the tire being characterized by the tread having a base region disposed at depth D and a cap region over the base region, the base region and the cap region adjoining along a boundary, the cap region comprising a cap rubber composition having properties measured at 23° C. of: elongation of 400 to 500%, true tensile of 77 to 83 MPa, 300% modulus of 9 to 11 MPa, tensile strength of 14 to 15 MPa, shore A hardness of 63 to 68, rebound of 20 to 25%; and the base region comprising a base rubber composition having properties measured at 23° C. of: elongation of 470 to 520%, true tensile of 135 to 150 MPa, 300% modulus of 13 to 15.5 MPa, tensile strength of 22 to 25 MPa, shore A hardness of 63 to 67, rebound 50 to 55%. (end of abstract) Agent: The Goodyear Tire & Rubber Company Intellectual Property Department 823 - Akron, OH, US Inventors: Daniel Roder, Tom Dominique Linster, Fahri Ozel USPTO Applicaton #: 20060231181 - Class: 152154200 (USPTO) Related Patent Categories: Resilient Tires And Wheels, Tires, Resilient, With Wear Indicating Feature The Patent Description & Claims data below is from USPTO Patent Application 20060231181. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application claims the benefit of co-pending Ser. No. 60/671,568, filed Apr. 15, 2005, and fully incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] Tires generally have a tread that is well suited for a specific vehicle application. Certain tread and reinforcement packages specifically designed for a racing truck are well known. The considerations relevant to a tire for such an application are, among others, tread configuration, reinforcement package disposition, and material composition. While existing and commercially available tires developed for truck racing to date have worked well, certain shortcomings in such tires remain. In particular, existing truck racing tire designs are deficient in several key areas. [0003] First, the weight and material utilization in currently available truck racing tires is greater than desired resulting in a tire with less than optimal temperature and weight characteristics. Another problem is that existing tire tread designs for truck racing applications experience irregular wear in the shoulder region of the tire and offer a less than optimal indication of wear. Such irregular shoulder wear results in unpredictable performance and a resultant competitive disadvantage. There is, therefore, a continuing need for a tire providing a predictable and accurate indication of wear in critical regions of the tire. [0004] Still a further problem is that existing tread and tire designs provide less than satisfactory lateral stability and handling and lower than desired resistance in the event of tread damage. A continuing need, accordingly, exists for a truck racing tire that eliminates or mitigates the aforementioned deficiencies. SUMMARY OF THE INVENTION [0005] The invention is directed to a pneumatic radial ply truck tire having a tread with a tread depth D, at least two circumferential grooves dividing the tread into at least a first shoulder circumferential rib, an intermediary circumferential rib, and a second shoulder circumferential rib, the tire being characterized by the tread having a base region disposed at depth D and a cap region over the base region, the base region and the cap region adjoining along a boundary, the cap region comprising a cap rubber composition having properties measured at 23.degree. C. of: elongation of 400 to 500%, true tensile of 77 to 83 MPa, 300% modulus of 9 to 11 MPa, tensile strength of 14 to 15 MPa, shore A hardness of 63 to 68, rebound of 20 to 25%; and the base region comprising a base rubber composition having properties measured at 23.degree. C. of: elongation of 470 to 520%, true tensile of 135 to 150 MPa, 300% modulus of 13 to 15.5 MPa, tensile strength of 22 to 25 MPa, shore A hardness of 63 to 67, rebound 50 to 55%. BRIEF DESCRIPTION OF THE DRAWINGS [0006] The invention will be described by way of example and with reference to the accompanying drawings in which: [0007] FIG. 1 is a perspective side elevation view of a tire configured according to the present invention. [0008] FIG. 2 is a front elevation view of a portion of the tire of FIG. 1. [0009] FIG. 3 is a transverse sectional view through the tire of FIG. 1. [0010] FIG. 4 is an enlarged section view of the tread portion of the tire of FIG. 1. [0011] FIG. 5 is a top plan view of a portion of the tire tread. [0012] FIG. 6 is a top plan view of a tire tread portion indicating a wear condition. [0013] FIG. 7 is a top plan view of a tire tread portion showing notch patterns within each tread rib. [0014] FIG. 8 is a section view through a notch of FIG. 7 taken along the line 8-8. [0015] FIG. 9 is a longitudinal section view through a notch of FIG. 7 taken along the line 9-9. [0016] FIG. 10 is a transverse section view through a notch of FIG. 7 taken along the line 10-10. [0017] FIG. 11 is a longitudinal section view through a notch of FIG. 7 taken along the line 11-11. [0018] FIG. 12 is a transverse section view through a groove of FIG. 7 taken along the line 12-12. [0019] FIG. 13 is a perspective side elevation view of an alternative embodiment of a tire configured pursuant to the invention. [0020] FIG. 14 is a front elevation view of a portion of the tire of FIG. 13. [0021] FIG. 15 is a transverse section view through the tire of FIG. 13. Continue reading... Full patent description for Truck racing tire Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Truck racing tire patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Truck racing tire or other areas of interest. ### Previous Patent Application: Tire with tire tag Next Patent Application: Run-flat support ring with improved mounting features Industry Class: Resilient tires and wheels ### FreshPatents.com Support Thank you for viewing the Truck racing tire patent info. 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