Pneumatic tire having expanded outer tread rubber layer

Details Pneumatic tire having expanded outer tread rubber layer Pneumatic tire having expanded outer tread rubber layer

1990-11-26

1993-01-26

Knable, Geoffrey L.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1100

Patent

active

051819767

ABSTRACT:
A pneumatic tire having excellent tire performances in winter and summer seasons comprises a tread, a part of which is comprised of an expanded rubber in a volume corresponding to at least 10% of the total volume of the tread at its surface. This expanded rubber contains particular rubber component and particular high reinforcing carbon black and oil, and has particular number of closed cells having a specified cell diameter to the total number of closed cells. Furthermore, a rubber reinforcing layer is arranged near to the tread shoulder.

REFERENCES:
patent: 4007069 (1977-02-01), Takayanagi et al.
patent: 4249588 (1981-02-01), Egan
patent: 4398582 (1983-08-01), Yuto et al.
patent: 4644988 (1987-02-01), Ahmad et al.
patent: 4784695 (1988-11-01), Mito et al.
Samuel K. Clark, ed., "Mechanics of Pneumatic Tires," Aug. 1981, pp. 29-33.

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