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:
Jan. 14, 1992
Filed:
Feb. 16, 1988
Kazuhiko Kawamura, Shirakawa, JP;
Abstract
The invention relates to a pneumatic radial tire for heavy duty vehicles such as trucks, buses etc., having an improved reinforced structure of bead section, which can be effectively improved in the durability under very heavy load conditions and can be recapped two or three times without damaging the base tire. The radial tire for heavy duty, comprises: a carcass ply (2) of a radial or a semi-radial construction composed of at least one rubberized metal cord ply; a first metallic cord reinforcing layer (4) disposed at the outside of the turned up portion (2') of the carcass ply (2); and a second fiber cord reinforcing layer (6) secured to the inner surface of the carcass ply main portion. The radially inner portion of the second reinforcing layer (6) is interposed by a given width (L) between the turned up portion (4') of the first reinforcing layer (4) and the main portion of the carcass ply in bead base portion. The height (h1) of the radially outermost end (2a) of the turned up portion (2') of the carcass ply (2) is higher than the height (h2) of the radially outermost end (4a) of the first reinforcing layer (4).