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:
Aug. 05, 2003
Filed:
Jul. 07, 1998
Masahiro Katayama, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
As shown in FIGS. and , in a pneumatic tire of the present invention, block-shaped land portions are divided by main grooves and lug grooves on the tread of a studless tire and a plurality of transverse sipings is formed on each of the block-shaped land portions . Each sipings is formed from a first linear portion A, a second linear portion B, and a sloping line portion C. The first linear portion A essentially extends in a direction perpendicular to the surface A of the block-shaped land portion and contacts the surface A, the second linear portion B essentially extends in a direction perpendicular to the surface A and is separated from the surface A, and the sloping line portion C inclines to connect the ends of the first linear portion A and the second linear portion B. In each of the sipings , the position D of the sloping line portion C is set to 10% to 60% of the siping depth D. As a result, deterioration of ground-contacting performance when the number of sipings is increased is prevented. In this way, wet grip performance, braking performance on ice, traction performance, and irregular wear resistance can be improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile