Aircraft pneumatic tire

Patent metadata

Field	Value
Publication number	US-2016009139-A1
Application number	US-201414771808-A
Country	US
Kind code	A1
Filing date	Mar 12, 2014
Priority date	Mar 18, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

An object of the invention is to increase the room for elongation of a tread protection layer, while securing durability.
An aircraft pneumatic tire 10 includes: a tread protection layer ( 12 ) that is provided at a lower layer of a tread section ( 22 ), and that includes plural cords ( 24 ) that arrayed in a tire width direction and are each disposed along a wave shaped imaginary line extending along a tire circumferential direction with the tire width direction as the amplitude direction; and cord discontinuity portions ( 14 ) where locations of close proximity of the cords ( 24 ) to each other are partially omitted in the tread protection layer ( 12 ).

First claim

1 . An aircraft pneumatic tire, comprising:
a tread protection layer that is provided at a lower layer of a tread section, and that includes a plurality of cords that are arrayed in a tire width direction and are each disposed along a wave shaped imaginary line extending along a tire circumferential direction with the tire width direction as the amplitude direction, wherein the cords in the tread protection layer include a plurality of cord discontinuity portions along the tire circumferential direction.

2 . The aircraft pneumatic tire of claim 1 , wherein:
the cords are formed in a sine wave shape as viewed in tread plan view; and the cord discontinuity portions include positions corresponding to inflection points of the sine waves.

3 . The aircraft pneumatic tire of claim 1 , wherein:
the tread section is partitioned, by a plurality of circumferential direction grooves extending along the tire circumferential direction, into a wide-width rib positioned at a tire width direction central portion, and into narrow-width ribs positioned at the tire width direction outer sides of the wide-width rib; and a tire circumferential direction interval between one of the cord discontinuity portions and another of the cord discontinuity portions is narrower in a region corresponding to the wide-width rib than in the regions corresponding to the narrow-width ribs.

4 . The aircraft pneumatic tire of claim 2 , wherein:
the tread section is partitioned, by a plurality of circumferential direction grooves extending along the tire circumferential direction, into a wide-width rib positioned at a tire width direction central portion, and into narrow-width ribs positioned at the tire width direction outer sides of the wide-width rib; and a tire circumferential direction interval between one of the cord discontinuity portions and another of the cord discontinuity portions is narrower in a region corresponding to the wide-width rib than in the regions corresponding to the narrow-width ribs.

Assignees

• Bridgestone Corp

Inventors

• Sakiyama Tomotaka

Classifications

• B60C9/0057 Primary

  Reinforcements comprising preshaped elements, e.g. undulated or zig-zag filaments · CPC title

• B60C11/04 Primary

  in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag (B60C11/12, B60C11/13 take precedence) · CPC title

• B60C2009/2032

  characterised by the course of the belt cords, e.g. undulated or sinusoidal · CPC title

• B60C2009/229

  characterised by the course of the cords, e.g. undulated or sinusoidal · CPC title

• B60C2200/02

  for aircrafts · CPC title