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. 08, 1995
Filed:
Dec. 16, 1993
Wako Iwamura, Hyogo, JP;
Yasuhiro Narahara, Hyogo, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
The invention relates to a pneumatic radial tire that has a tread of straight grooves of broad and narrow widths and which is adapted to insure sufficient rigidity in the tread to provide better steering stability. Tie bars are provided in straight sub-grooves of narrow width one of which is located between an inner middle block and an outer middle block, thereby reinforcing the acute-angled portions of the inner and outer middle blocks. Each tie bar consists of an inner tie bar with length L.sub.1 that extends in contact with the land angle of .alpha..sub.1 of the inner middle block and an outer tie bar with length L.sub.2 that extends in contact with the land angle .alpha..sub.2 of the outer middle block.