Runflat tire with sawtooth shaped insert

Details Runflat tire with sawtooth shaped insert Runflat tire with sawtooth shaped insert

2005-08-02

2005-08-02

Aftergut, Jeff H. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

C152S517000, C152S522000, C152S155000, C152S196000

Reexamination Certificate

active

06923233

ABSTRACT:
A runflat radial ply tire (70) having a thread (72), a carcass (86) and a belt structure (74) radially located between the thread and the carcass has two sidewalls (80, 82) each reinforced with a circumferentially disposed wedge insert (50a′, 50b′) having a saw-tooth cross-sectional shape. The saw-tooth cross-sectional shape of each wedge insert (50a′, 50b′) is defined by a plurality of circumferentially disposed segments (52a–52e), each of which is separated from adjacent segments by circumferentially disposed grooves (54a–54d). During heavy loading of the tire, or during runflat operation, the radially loaded sidewall portions deform until the grooves (54a′–54d′) undergo closure.

REFERENCES:
patent: 3782440 (1974-01-01), Depmeyer
patent: 4059138 (1977-11-01), Mirtain et al.
patent: 4111249 (1978-09-01), Markow
patent: 4405007 (1983-09-01), Welter
patent: 5368082 (1994-11-01), Oare et al.
patent: 867103 (1958-06-01), None
patent: 4-334603 (1992-11-01), None
patent: WO00/01543 (2000-01-01), None
“Mechanics of Pneumatic Tires”, United Sates Department of Commerce, Samuel Clark ed., 1971.
Patent Abstracts of Japan vol. 015, No. 290, Jul. 1991.

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