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:
May. 29, 1990
Filed:
Jun. 17, 1988
Charles M Roland, Waldorf, MD (US);
Georg G Bohm, Akron, OH (US);
Steven E Schonfeld, Akron, OH (US);
Bridgestone/Firestone, Inc., Akron, OH (US);
Abstract
Sidewalls (12,13) for pneumatic tires (10) having a greater stiffness improve handling and performance of the tire. The sidewalls comprise a rubber, selected from the group consisting of natural rubber, synthetic rubber and blends thereof, and from about 20 to 80 parts of a rubber compatible additive, per 100 parts of rubber capable of imparting a tensile modulus of from about 30 to 200 MPa at 10 percent elongation. Pneumatic tires provided with such sidewalls are improved and exhibit higher cornering force coefficients. A method for improving the handling characteristics of pneumatic tires includes the step of applying sidewalls to the tire carcass during building, having a tensile modulus of from about 30 to 200 MPa at 10 percent elongation.