Pneumatic tire with polygonal bead core

Details Pneumatic tire with polygonal bead core Pneumatic tire with polygonal bead core

1991-04-19

1993-04-27

Knable, Geoffrey L.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

245 15, B60C 1504

Patent

active

052058832

ABSTRACT:
A pneumatic radial tire having a circular bead core of substantially polygonal cross section which includes a base (a) adjacent an inclined bead base portion of the tire, an inner side (b) on a side of the bead core nearest a bead toe portion of the tire, an outer side (d) on a side of the bead core nearest a bead heel portion of the tire, and a top side (c) opposite the base (a) and joining the inner side (b) and the outer side (d). An inclination .theta..sub.1 of the base (a) relative to the axial direction of the tire is substantially the same as that of the bead base portion relative to the axial direction of the tire. A cross angle .beta. between the base (a) and the inner side (b) is 70.degree. to 90.degree.. An inclination .theta..sub.2 of the top side (c) relative to the axial direction of the tire is smaller than the inclination .theta..sub.1 and the direction of inclination of the top side (c) is opposite to that of the base (a).

REFERENCES:
patent: 4180116 (1979-12-01), Maiocchi
patent: 4192368 (1980-03-01), Maiocchi
patent: 4998575 (1991-03-01), Kanamaru

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