US 2015/0083298 A1Published application

Pneumatic tire

AssigneeThe Yokohama Rubber Co., Ltd.

InventorYoshifumi KOISHIKAWA

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Abstract

A pneumatic tire in which an inner liner including a film mainly made of thermoplastic resin is attached to an inside of the tire via a tie rubber sheet, on an inner side of a carcass layer, and which has a lap-splice portion where end portions of the film in a tire circumferential direction overlap each other in a tire widthwise direction with tie rubber therebetween. A section of the film on a tire cavity side in the lap-splice portion has a portion where the film is thin over part or entirety of the width in the tire widthwise direction before the lap-splice portion, or a film thickness in the lap-splice portion is smaller than a film thickness in a portion other than the lap-splice portion. Thus, the pneumatic tire has no crack developing around the lap-splice portion of an inner liner layer after running, and has excellent durability.

Claims6

Dependent claims

A pneumatic tire comprising:

a carcass layer;
and
an inner liner including a film mainly including a thermoplastic resin that is attached to an inside of the tire via a tie rubber sheet on an inner side of the carcass layer, the inner liner having a lap-splice portion where end portions of the film in a tire circumferential direction overlap each other in a tire widthwise direction with tie rubber therebetween, at least one of a section of the film on a tire cavity side and a section of the film on a tire outer circumference side in the lap-splice portion being formed in such a way that a film thickness in the lap-splice portion is smaller than a film thickness in a portion other than the lap-splice portion, a portion of the lap-splice portion which is formed to be thinner than a film thickness of the portion other than the lap-splice portion being formed to have such a shape that the film becomes thinner stepwise, and a film thickness of the portion of the lap-splice portion where the film is thin being 20% to 80% of the thickness of the film in the portion other than the lap-splice portion.

Dependencies are inferred from the claim text.

Facts

Application: 14/560,655Filed 4 Dec 2014
Priority: JP 2012-00197710 Jan 2012
Published: 26 Mar 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B60C 19/00
Tyre parts or constructions not otherwise provided for
B60C 5/14
Without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim: with impervious liner or coating on the inner…
B60C 2005/145
With impervious liner or coating on the inner wall of the tyre: made of laminated layers
B60C 2005/147
With impervious liner or coating on the inner wall of the tyre: characterised by the joint or splice

Family

Application13/737,574Continuation · filed 9 Jan 2013
Application14/560,655Continuation
US 2013/0174953 A1Published application
US 9,004,129 B2Related patent
US 9,902,214 B2Related patent
US 2015/0083298 A1This patent

From the US filing history. Foreign family members aren’t listed.