Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Reexamination Certificate
2006-01-20
2010-11-02
Johnstone, Adrienne C (Department: 1791)
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
C152S451000, C152S531000, C152S533000, C428S394000
Reexamination Certificate
active
07823616
ABSTRACT:
This invention relates to a pneumatic radial tire being excellent in steering stabilities during low-speed running and high-speed running, and more particularly to a pneumatic radial tire comprising at least one belt reinforcing layer6A,6B disposed on a belt5outward in a radial direction of the tire, characterized in that a reinforcing element constituting the belt reinforcing layer6A,6B is a polyketone fiber cord satisfying conditions of the following equations (I) and (II):in-line-formulae description="In-line Formulae" end="lead"?σ≧−0.01×E+1.2 (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?σ≧−0.02 (II)in-line-formulae description="In-line Formulae" end="tail"?[wherein σ is a thermal shrinkage stress (cN/dtex) at 177° C.; and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N].
REFERENCES:
patent: 2002/0017351 (2002-02-01), Miyazaki et al.
patent: 2002/0195185 (2002-12-01), Choi et al.
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patent: 2003-252005 (2003-09-01), None
patent: 2004-218189 (2004-08-01), None
patent: 2004-306633 (2004-11-01), None
English machine translation of JP 2001-295134 A, Oct. 26, 2001.
English machine translation of JP 2004-218189 A, Aug. 5, 2004.
Supplementary European Search Report for EP 06 71 2095 dated Jun. 25, 2009.
Bridgestone Corporation
Johnstone Adrienne C
Sughrue & Mion, PLLC
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