Dual bead diameter tire

Details Dual bead diameter tire Dual bead diameter tire

1993-01-19

1994-04-12

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152454, 152455, 152456, 152526, 152548, 152DIG6, 1561101, B60C 306, B60C 902, B60C 918

Patent

active

053017285

ABSTRACT:
A pneumatic tire having two different bead diameters has handling, ride and treadwear advantages. The tire is made so that the rho.sub.m of the longer sidewall and the rho.sub.m of the shorter sidewall are equal. The rho.sub.m of the longer sidewall is made equal to the rho.sub.m of the shorter sidewall by establishing a belt profile wherein the amount of drop at a belt edge is specified to give a mold drop of 0.30 to 0.33 of estimated tire deflection, applying an inflated shape prediction formula to calculate the inflated belt profile and varying the value of rho.sub.m until the drop at the end of the belt closely matches a specified value, using the cosine law to specify the change in belt angle with radius, choosing a shoulder point under the belt edge that allows a 0.050 inch wedge between the bottom of the belt and the top of the carcass ply and varying the slope of the ply at the shoulder point until the inflated ply line passes through the Y-max location at rho.sub.m.

REFERENCES:
patent: 774790 (1904-11-01), Seddon
patent: 870248 (1907-11-01), Palmer
patent: 1157559 (1915-10-01), Lewellen
patent: 2018597 (1935-10-01), Bourdon
patent: 2028702 (1936-01-01), Hale
patent: 2108329 (1938-02-01), Carter
patent: 2347622 (1944-04-01), Tschanz
patent: 2843171 (1958-07-01), Howe
patent: 3656532 (1972-04-01), Roberts
patent: 3842882 (1974-10-01), Gough et al.
patent: 3974870 (1976-08-01), Watts
patent: 4124679 (1978-11-01), DeWitt

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