Pneumatic tire with reinforcement material

Patent metadata

Field	Value
Publication number	US-11260703-B2
Application number	US-201916676535-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Apr 15, 2019
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A pneumatic tire with a reinforcement material includes: a tread that comes in contact with a road surface; side walls that extend and form shoulders and inner liners at both sides of the tread; a carcass that is integrally attached to the tread and the inner sides of the side walls and forms a turn-up head at both ends of the side walls; a belt layer that is layered on the tread of the carcass; and a bead that includes a bead core inserted in a wheel inside the turn-up head, a bead filler inserted in a side of the tread of the bead core, and a reinforcement material inserted in an interface of the turn-up head.

First claim

What is claimed is:

1. A pneumatic tire comprising:
a tread configured to come in contact with a road surface;
an inner liner;
a pair of beads, each bead of the pair of beads including a bead core, a bead filler, and a reinforcement material;
a carcass extending from one bead to the other bead of the pair of beads, the carcass including a pair of turn-up portions, each turn-up portion of the pair of turn-up portions surrounding each respective bead core;
a pair of side walls, each side wall of the pair of side walls extending from the tread to each respective bead and forming a shoulder; and
a belt layer disposed between the carcass and the tread,
wherein the reinforcement material is adjacent to its respective turn-up portion of the carcass,
wherein an end point of the reinforcement material closest to the tread is spaced apart from an end point of the bead filler closest to the tread,
wherein the carcass includes a first carcass layer and a second carcass layer, the first carcass layer is closer to a wheel than the second carcass layer, the second carcass layer is closer to the belt layer than the first carcass layer, and the second carcass layer has the pair of turn-up portions, and
wherein an end point of the first carcass layer is positioned underneath a bottom surface of each respective bead core, and an end point of each turn-up portion of the second carcass layer is positioned in a radial direction of the tire that is within a side surface of each respective bead core.

2. The pneumatic tire of claim 1 ,
wherein an end point of the reinforcement material closest to the wheel is positioned adjacent to the side surface of each respective bead core.

3. The pneumatic tire of claim 1 ,
wherein the reinforcement material includes one or more steel wires configured to be bent in a temperature range of 15° C. to 45° C.

4. The pneumatic tire of claim 1 ,
wherein the end point of the reinforcement material closest to the tread is spaced 5 mm to 10 mm apart from the end point of the bead filler closest to the tread.

5. The pneumatic tire of claim 1 ,
wherein the end point of each turn-up portion of the second carcass layer is spaced 5 mm to 7 mm apart from the reinforcement material.

Assignees

• Hankook Tire & Tech Co Ltd

Inventors

• Kim Sol
• Yun Kyung Min
• Hong Chang Hyo

Classifications

• B60C15/0009

  features of the carcass terminal portion · CPC title

• B60C2015/0614

  characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim · CPC title

• B60C9/16 Primary

  built-up with metallic reinforcing inlays · CPC title

• B60C2015/0692

  characterised by particular materials of the cords · CPC title

• B60C2015/0678

  Physical properties of the bead reinforcing layer, e.g. modulus of the ply · CPC title