Tire bead geometry

Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube

Reexamination Certificate

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Details

C152S539000, C152S543000

Reexamination Certificate

active

06896021

ABSTRACT:
A pneumatic tire has a carcass structure extending through a pair of opposing bead portions and an inner liner located inward of the carcass structure, each bead portion comprising a bead core about which is wrapped the carcass structure and a toeguard. Each bead portion has a bead toe, a bead base, and a bead heel, the bead base extending between the bead toe and the bead heel. The bead heel has a profile corresponding to a sector of an ellipse or approximates a sector of an ellipse by having a dual radius structure. The bead base may have a dual taper configuration. The bead core may be substantially centered in the bead portion, as determined by the material thickness at three locations about the bead core.

REFERENCES:
patent: 4057091 (1977-11-01), Gardner et al.
patent: 5010938 (1991-04-01), Assaad et al.
patent: 5029627 (1991-07-01), Ochiai
patent: 5332019 (1994-07-01), Yoshida et al.
patent: 5458175 (1995-10-01), Matsuura et al.
patent: 6505662 (2003-01-01), Mori et al.
patent: 20010018943 (2001-09-01), Shida et al.
patent: 20020062890 (2002-05-01), Masaoka et al.
patent: 09263112 (1997-10-01), None

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