Pneumatic tire having plural aramid carcass plies

Details Pneumatic tire having plural aramid carcass plies Pneumatic tire having plural aramid carcass plies

1988-02-17

1989-05-23

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152548, 152561, B60C 909

Patent

active

048321036

ABSTRACT:
A pneumatic tire (10) has adjacent carcass plies (13, 14, 15) which are reinforced by cables comprising aramid filaments. The amount of strength retained by the cables over a period of normal use of the tire is increased when for each pair of adjacent carcass plies: (a) the cables of the radially innermost of said carcass plies intersect the mid-circumferential plane (CP) of the tire at a first angle in the range of 75.degree. to 105.degree. and the cables of the radially outermost of said carcass plies intersect the mid-circumferential centerplane (CP) at a second angle in the range of 75.degree. to 105.degree.; (b) said second angle is nearer to 90.degree. than said first angle; and (c) the included angle between said first and second angles is not greater than 10.degree..

REFERENCES:
patent: 2432630 (1947-12-01), Purdy
patent: 2703128 (1955-03-01), Darrow
patent: 2782830 (1957-02-01), Wallace
patent: 3165138 (1965-01-01), Manchetti et al.
patent: 3442315 (1969-05-01), Mirtain
patent: 3770041 (1973-11-01), Abbott
patent: 4177852 (1979-12-01), Merli et al.
patent: 4469157 (1984-09-01), Morikawa et al.

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