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US 7,588,064 B2Granted
Pneumatic tire and method of manufacturing the same
AssigneesThe Yokoham Rubber Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha
InventorEiji Saito
Life of this patent
Estimating the term…
Abstract
A pneumatic tire having a puncture preventive layer formed by windingly sticking a tube having seal material wrapped therein to the tire inner surface circumferentially of the tire and continuously and spirally with its side surfaces closely contacted each other: or a pneumatic tire having a puncture preventive layer formed by sticking micro balloons having seal material wrapped therein to the tire inner surface with their sides closely contacted with each other.
Claims6
A pneumatic tire comprising:
- a puncture preventive layer on a tire inner surface, the puncture preventive layer being spherical micro balloons filled with a seal material;
- wherein one of the micro balloons contacts another of the micro balloons,
- wherein the seal material is selected from the group consisting of butyl rubber, polyisobutylene, natural rubber, isoprene rubber, polybutene, and rubber latex,
- wherein for each of said micro balloons, the inner diameter is not less than 2 mm, the outer diameter is not more than 6 mm, and the wall thickness is not more than 0.5 mm, and
- wherein the micro balloons are attached to the tire inner surface.
2 more elements
A method of manufacturing a pneumatic tire, comprising steps of:
- forming, on an inner surface of an unvulcanized tire, a lining layer by sticking spherical micro balloons filled with a seal material in a manner such that the micro balloons contact with each other about their side surface and thereafter,
- forming said lining layer into a puncture prevention layer by curing the unvulcanized tire,
- wherein for each of said micro balloons, the inner diameter is not less than 2 mm, the outer diameter is not more than 6 mm, and the wall thickness is not more than 0.5 mm,
- wherein the seal material is selected from the group consisting of butyl rubber, polyisobutylene, natural rubber, isoprene rubber, polybutene, and rubber latex, and
- wherein the micro balloons are attached to the tire inner surface.
2 more elements
Dependencies are inferred from the claim text.