Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Reexamination Certificate
2004-09-06
2009-08-18
Fischer, Justin (Department: 1791)
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
C152S540000, C152S544000
Reexamination Certificate
active
07575032
ABSTRACT:
A pneumatic tire whose rim slip resistance and durability are improved by optimizing the shape of the bead base is provided.A polygonal bead core3having a bottom2extending generally along the tire width direction is embedded in a bead portion1. The bead portion1has a bead base6extending between a bead heel4and a bead toe5. A maximum displacement point11is within a range of 25% or less of the width w of the bottom of the bead core with the third base point10. The interference taat the maximum displacement point11is 1.1 to 1.3 times as much as the interference tbat the second base point8. the bead base6extends at least between the bead heel4and the first base point8and has a first tapered portion12with a taper angle θ1being identical with or greater by three degrees or less than a taper angle θBSof a bead seat of the standard rim R.
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Bridgestone Corporation
Fischer Justin
Sughrue & Mion, PLLC
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