Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1988-11-18
1990-08-21
Hoch, Raymond
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152534, 152536, B60C 918
Patent
active
049497707
ABSTRACT:
The invention relates to a breaker belt structure to be used in pneumatic tires, in particular in those of the radial carcass type. The structure comprises a radially outer strip of circumferentially arranged cords (61), preferably but not exclusively made of textile material, as polyamide or aromatic polyamide, and two felted layers (62), (63), situated in a radially inner position, which comprise an elastomeric or plastomeric supporting material and a reinforcing filler of aramide pulp oriented along a preferred direction which is inclined with respect to the circumferential direction, the preferred directions of orientation in the two felted layers being preferably inclined symmetrically to each other at an angle of 45.degree. with respect to said circumferential direction.
REFERENCES:
patent: 3918506 (1975-11-01), Marzocchi
patent: 4483381 (1984-11-01), Scriver
patent: 4691752 (1987-09-01), Kabe et al.
patent: 4733708 (1988-03-01), Kindry et al.
patent: 4871004 (1989-10-01), Brown et al.
L. H. Miner, Modern Plastics Encyclopedia, 1984-1985, Fibrous Reinforcements-Aramid, pp. 125-126, publish.-McGraw Hill, NY, NY 1984.
Polvara Ornella
Volpi Alessandro
Hoch Raymond
Pirelli Coordinamento Pneumatici S.p.A.
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