Self-Sealing Tire Comprising An Additional Sidewall Reinforcement
US-2015375574-A1 · Dec 31, 2015 · US
Pneumatic radial tire for a passenger car having ultra fine steel cords for a carcass ply
US9840114B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9840114-B2 |
| Application number | US-201514671641-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 27, 2015 |
| Priority date | Sep 23, 2014 |
| Publication date | Dec 12, 2017 |
| Grant date | Dec 12, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Disclosed is a pneumatic radial tire for a passenger car having ultra fine steel cords for a carcass ply in which adhesive force between a carcass ply layer and a side wall or a rim flange rubber adjacent to a turn up portion on an outside and a stiffness of the rim flange rubber are larger than a bending stiffness of the carcass ply layer so as to improve durability of a bead part while reducing poor air inletting generated at a carcass turn up portion.
First claim
Opening claim text (preview).
What is claimed is: 1. A pneumatic radial tire for a passenger car which uses ultra fine steel cords having a wire diameter of 0.14 mm or less as a reinforcing material of a carcass ply, wherein a bending force of the carcass ply (F P ; kgf) satisfies a relation equation below between a turn up height of the carcass ply (h, mm), a tensile strength of a rim flange rubber (M RF ; kgf/cm 2 ) at the time of 50% elongation and a unit cross sectional area (At; 1×t cm 2 ) depending on a thickness of rim flange rubber (t): 0< F P <(0.025 kgf/mm× h )+( M RF ×At ). 2. The pneumatic radial tire according to claim 1 , wherein the bending force of the carcass ply F P is larger than a bending force of carcass ply F pf made of an organic fiber. 3. The pneumatic radial tire according to claim 1 , wherein the ultra fine steel cord has a wire diameter of 0.04 to 0.14 mm, and a breaking force of 25 to 35 kgf.
Assignees
Inventors
Classifications
characterised by special physical properties of the reinforcements · CPC title
the cords extend transversely from bead to bead, i.e. radial ply (B60C9/07 takes precedence) · CPC title
Diameters of the cords; Linear density thereof · CPC title
- B60C9/02Primary
Carcasses · CPC title
- B60C9/0007Primary
Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal · CPC title
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Frequently asked questions
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- What does patent US9840114B2 cover?
- Disclosed is a pneumatic radial tire for a passenger car having ultra fine steel cords for a carcass ply in which adhesive force between a carcass ply layer and a side wall or a rim flange rubber adjacent to a turn up portion on an outside and a stiffness of the rim flange rubber are larger than a bending stiffness of the carcass ply layer so as to improve durability of a bead part while reduci…
- Who is the assignee on this patent?
- Kumho Tire Co Inc
- What technology area does this patent fall under?
- Primary CPC classification B60C9/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 12 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).