Resilient tires and wheels – Tires – resilient – Anti-skid devices
Reexamination Certificate
2011-05-03
2011-05-03
Maki, Steven D (Department: 1747)
Resilient tires and wheels
Tires, resilient
Anti-skid devices
C152S209180
Reexamination Certificate
active
07934526
ABSTRACT:
An aircraft pneumatic tire that has deeper grooves without causing deterioration in the heat resistance of a top tread and thereby can increase the number of landings per tread is provided.At least part of a top tread2in the width direction of the tire has a two-layer structure consisting of a base tread layer11and a cap tread layer12stacked in the radial outward direction in this order. At least one circumferential groove4ato4dis provided in the surface of the top tread2.The base tread layer11and the cap tread layer12satisfy the relationships expressed by the following formulas (1) and (2):in-line-formulae description="In-line Formulae" end="lead"?1.05<M(50)b/M(50)c≦1.30 (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.04<Rb/Rc≦1.20 (2)in-line-formulae description="In-line Formulae" end="tail"?(wherein M(50)band M(50)cdenote 50% moduli of the base tread rubber and the cap tread rubber, respectively, and Rband Rcdenote the resiliences of the base tread rubber and the cap tread rubber, respectively).
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Abstract for Japan 04-118305 (no date).
Machine translation for Japan 05-301507 (no date).
Onuma Shuichi
Suzuki Toru
Bridgestone Corporation
Maki Steven D
Sughrue & Mion, PLLC
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