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:
Jul. 19, 1988
Filed:
Apr. 18, 1986
Eiji Nakasaki, Kakogawa, JP;
Hisashi Shirashoji, Kobe, JP;
Katsuyuki Hoshikawa, Kobe, JP;
Takao Kamijo, Toyonaka, JP;
Kazushige Ikeda, Akashi, JP;
Yasuhiro Inoue, Himeji, JP;
Takeo Kato, Nishinomiya, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
Radial tires for motorcycles comprising a tread portion, side wall portions, bead portions, a carcass, bead apexes made of a rubber having a high hardness, and optionally reinforcing cord layers arranged outside the bead apexes, said tread portion having shoulder grooves at the shoulder portion thereof and center grooves at the center portion thereof and the depth of the shoulder grooves being from 5 to 50% of the depth of the center grooves, whereby cracking of the shoulder groove bottom caused by providing the bead apexes made of a hard rubber or the reinforcing cord layers is prevented.