Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1992-11-06
1995-05-30
Johnstone, Adrienne
Resilient tires and wheels
Tires, resilient
Anti-skid devices
57238, 57244, 57902, 152527, 152531, 152533, 152536, 152546, 152547, B60C 922, B60C 1100, B60C 1506, D02G 348
Patent
active
054193834
ABSTRACT:
A pneumatic tire, which comprises a tread portion (2) having a pair of tread edges, a pair of axially spaced bead portions (4), a pair of sidewall portions (3) extending between the tread edges and the bead portions (4), a bead core (5) disposed in each of the bead portions (4), a carcass (6) extending between the bead portions and turned up around the bead cores, a rubber tread disposed radially outside the crown portion of the carcass defining the tread portion, and a belt (7) made of at least one spirally wound belt cord (11) disposed between the carcass and the rubber tread, the belt cord (11) comprising a higher modulus strand (13A) and a lower modulus strand (14A) which are twisted together, the higher modulus strand (13A) made of at least one continuous organic filament (13) having a higher elastic modulus, the lower modulus strand (14A) made of at least one continuous organic filament (14) having a lower elastic modulus, and in a unit length of the belt cord, the length (L1) of the higher modulus filament (13) is in the range of 104 to 124% of the length (L2) of the lower modulus filament (14), each measured along the filament in an unloaded state.
REFERENCES:
patent: 3857229 (1974-12-01), Marzocchi
patent: 4155394 (1979-05-01), Shepherd et al.
patent: 4311179 (1982-01-01), Hayakawa et al.
patent: 4333507 (1982-06-01), Schmit et al.
patent: 4617976 (1986-10-01), Kawajiri
patent: 4706724 (1987-11-01), Ohkuni et al.
patent: 4832101 (1989-05-01), Welter
Johnstone Adrienne
Sumitomo Rubber Industries Ltd.
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