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:
Apr. 28, 1992
Filed:
Oct. 10, 1990
Iwao Shimomura, Hiratsuka, JP;
Shigeki Narahashi, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A pneumatic tire for a passenger car characterized in that a rubber chafer around bead portions is composed of a laminate member consisting of a soft rubber layer which is at least 0.2 mm thick and a hard rubber layer which is thicker than the soft rubber layer, the soft rubber layer being made of a rubber having a JIS hardness Hs of 50 to 65, a complex elastic modulus E* of at least 3.0 MPa and a compression set of up to 25% and disposed outside, and the hard rubber layer being made of a rubber having a JIS hardness Hs of 70 to 85, a complex elastic modulus E* of at least 6.0 MPa and a compression set of up to 32% and disposed inside.