Tire and wheel rim assembly

Details Tire and wheel rim assembly Tire and wheel rim assembly

1990-11-06

1991-11-19

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152544, 152547, B60C 1506

Patent

active

050658034

ABSTRACT:
A tire and wheel rim assembly in which the tire has a pair of axially spaced bead portions, and the wheel rim has a pair of axially spaced bead seats upon which the bead portions of the tire are seated, at least one of the bead seats is provided at the axially inner edge thereof with a circumferential groove, at least one of the bead portions is provided with a toe extending radially inwardly into the circumferential groove, wherein the toed bead portion comprises a soft rubber layer disposed along the bottom face of the bead portion to form said bead toe and a hard rubber layer disposed radially outside the soft rubber layer, the soft rubber layer is covered by a fabric chafer disposed along the contour of the bead portion, the hard rubber layer is made of relatively hard rubber having a JIS A hardness HS1 of not less than 60 and not more than 95, the soft rubber layer is made of soft rubber having a JIS A hardness HS2 of not less than 48 and not more than 90, and the ratio HS2/HS1 of the hardness HS2 of the soft rubber to the hardness HS1 of the hard rubber layer is not less than 0.7 and not more than 0.95.

REFERENCES:
patent: 4508153 (1985-04-01), Tanaka et al.

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