Aircraft pneumatic tire

Patent metadata

Field	Value
Publication number	US-9925833-B2
Application number	US-201414771808-A
Country	US
Kind code	B2
Filing date	Mar 12, 2014
Priority date	Mar 18, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

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

The invention claimed is:

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,
the cord discontinuity portions are provided at every other cord, and
the cords between the every other cord having the cord discontinuity portions are continuous.

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

• B60C2200/02

  for aircrafts · CPC title

• B60C9/2009

  comprising plies of different materials · CPC title

• B60C2009/229

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

• B60C9/0057 Primary

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