Pneumatic low section tire

Details Pneumatic low section tire Pneumatic low section tire

1987-06-04

1988-09-27

Ball, Michael

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1100

Patent

active

047734590

ABSTRACT:
In a pneumatic low section tire with an aspect ratio (height/width) of 0.65 or less, when a green tire is pressurized with a bladder within a mold, tread rubber is forced to flow into recesses for forming a tread block pattern. With this rubber flow, the belt is subjected to deformation toward the same recesses, so that the belt layer deforms outward at the middle of the transversal grooves between two main circumferential grooves. This deformation causes the skid base rubber existing between the transversal groove bottom and the belt layer to be thin at the middle of the transversal grooves, thus resulting in an early trouble. To overcome this problem, the transversal grooves are formed in raised bottom or corrugation fashion along a longitudinal direction thereof, to obtain a uniformly thick skid base. Further, this raised bottom serves to increase the drainage effect during rainy weather running.

REFERENCES:
patent: 3559712 (1971-02-01), Verdier
patent: 4223712 (1980-09-01), Iwata et al.
patent: 4649975 (1987-03-01), Kogure et al.
patent: 4676290 (1987-06-01), Tansei

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