The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2020
Filed:
Jul. 26, 2016
Sumitomo Rubber Industries Ltd., Kobe-shi, JP;
SUMITOMO RUBBER INDUSTRIES LTD., Kobe-shi, JP;
Abstract
An airless tire includes a tread ring, a hub formed on radial direction inner side of the ring to be fixed to an axle, and a spoke structure connecting the ring and hub. The ring includes a tread rubber layer, a first reinforcing cord layer, a second reinforcing cord layer and a shear rubber layer between the first and second cord layers, the first and second cord layers and shear layer are formed such that ratio Eb/Ee between tire circumferential direction tensile modulus Ebof the first cord layer and shear modulus Ee of the shear layer is 100 or greater and ratio Eb/Ee between tire circumferential direction tensile modulus Ebof the second cord layer and shear modulus Ee is 100 or greater, and each cord layer has topping rubber having loss tangent tan δb of 0.03 to 0.10 and tensile modulus E*b of 4 to 20 MPa.