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:
Oct. 30, 2012
Filed:
Feb. 19, 2008
Fumio Takahashi, Kodaira, JP;
Shu Fujiwara, Kawasaki, JP;
Shu Nagai, Sayama, JP;
Takanari Saguchi, Musashino, JP;
Naoya Ochi, Higashimurayama, JP;
Yukihiro Kiwaki, Higashimurayama, JP;
Fumio Takahashi, Kodaira, JP;
Shu Fujiwara, Kawasaki, JP;
Shu Nagai, Sayama, JP;
Takanari Saguchi, Musashino, JP;
Naoya Ochi, Higashimurayama, JP;
Yukihiro Kiwaki, Higashimurayama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
The present invention provides a pneumatic tire having: a circumferential groove continuously extending in the tire circumferential direction in a ground contact surface of a tread portion; and a resonator provided in a land portion and constituted of a resonance cell portion opened to a ground contact region at a position distanced from the circumferential groove and a siping portion making the resonance cell portion communicate with the circumferential groove, wherein change in a tread pattern as time lapses can be alleviated without scarifying an effect of reducing pipe resonance sounds. Specifically, an opening width of the siping portion at the ground contact surface of the tread portion is designed to change in the longitudinal direction thereof such that the opening with is relatively narrow on the side of the circumferential groove and relatively wide on the side of the resonance cell portion.