Heavy duty tire

Details Heavy duty tire Heavy duty tire

2011-07-19

2011-07-19

Maki, Steven D (Department: 1747)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209180, C152S526000, C152S902000

Reexamination Certificate

active

07980279

ABSTRACT:
A heavy duty tire is vulcanized in a segmented mold having a tread molding surface defined by circumferentially arranged segments. The tread portion is molded by the tread molding surface during vulcanization of the tire, wherein the stretch of the belt layer in the tire radial direction during vulcanization is in a range of from 3.2 to 5.2%. the tread portion is provided with an axially outermost circumferential groove at an axial distance from the tire equator which distance is in a range of from 50% to 68% of one half of the tread width. The footprint shape satisfies the following conditions: (1) 1.05=<SL0/SL70=<1.18; and (2) 0.95=<SL70/SL97=<1.05, wherein SL0, SL70and SL97are the circumferential lengths of the footprint shape measured at axial distances of 0%, 70% and 97%, respectively, of one half of the tread width from the tire equator.

REFERENCES:
patent: 5234326 (1993-08-01), Galli et al.
patent: 5445201 (1995-08-01), Kukimoto et al.
patent: 5460214 (1995-10-01), Fujita et al.
patent: 2004/0079460 (2004-04-01), Maruoka et al.
patent: 2005/0016656 (2005-01-01), Kuroki et al.
patent: 2005/0092412 (2005-05-01), Iizuka
patent: 2005/0216224 (2005-09-01), Obunai
patent: 2006/0048874 (2006-03-01), Maruoka
patent: 58-039438 (1983-03-01), None
patent: 11-300746 (1999-11-01), None
patent: 2004-51083 (2004-02-01), None
Machine translation for Japan 11-300746 (no date).

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