Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1996-07-10
1998-09-01
Maki, Steven D.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
1561101, 264326, 425 281, 425812, B29C 3310, B29D 3300, B60C 1101, B60C10100
Patent
active
058006427
ABSTRACT:
A pneumatic tire, a tire making method and a tire vulcanizing mold are disclosed. The tire has a pair of rounded or tapered shoulder portions each of which is provided with a circumferentially extending narrow groove for improving the wandering performance. The mold is provided with a tread molding face and shoulder molding faces. Each of the shoulder molding faces is provided with a protrusion for forming the above-mentioned narrow groove. The protrusion is provided with slits for forming thin partition walls in the narrow groove. The tread molding face is provided with vent holes. And vent grooves each of which extends from one of the slits in the shoulder molding face into the tread molding face is provided. As a result, no spue is formed in the tire shoulder portions and the tire appearance is improved. And the productivity can be improved.
REFERENCES:
patent: 3467160 (1969-09-01), Oguri
patent: 5066209 (1991-11-01), Schmaderer et al.
patent: 5152951 (1992-10-01), Ahmad et al.
Patent Abstracts of Japan, vol. 15, No. 120 (M-1096) 25 Mar. 1991 (Abstract, JP 03 009817 A).
Patent Abstracts of Japan, vol. 017, No. 520 (M-1482) 20 Sep. 1993 (Abstract, JP 05 138656 A).
Maki Steven D.
Sumitomo Rubber Industries Ltd.
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