# US 8,539,999 B2 · Tire with chafer

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- Number: US 8,539,999 B2
- Document ID: US8539999B2
- Status: Granted
- Kind: B2
- Application number: 12/335,979
- Filed: 2008-12-16
- Published: 2010-06-17
- Granted: 2013-09-24
- Earliest claimed: 2008-12-16
- Assignees: The Goodyear Tire & Rubber Company
- Applicants: Matthieu Pingenat; Filomeno Gennaro Corvasce; Massimo Di Giacomo Russo; Isabelle Lea Louise Marie Lambert; Pierre Bernard Raoul Brochet
- Inventors: Matthieu Pingenat; Filomeno Gennaro Corvasce; Massimo Di Giacomo Russo; Isabelle Lea Louise Marie Lambert; Pierre Bernard Raoul Brochet
- Web page: https://patentgrep.com/patent/US8539999B2

## CPC

- B60C 15/06: Flipper strips, fillers, or chafing strips {and reinforcing layers for the construction of the bead}
- B60C 1/00: Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- C08L 7/00: Compositions of natural rubber
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L 9/06: Copolymers with styrene
- C08L 21/00: Compositions of unspecified rubbers
- B60C 2015/0614: {characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim}
- C08K 3/04: Carbon
- C08K 3/36: Silica
- C08L 23/06: Polyethylene
- Y10T 152/10819: Characterized by the structure of the bead portion of the tire
- Y10T 152/10828: Chafer or sealing strips
- Y10T 152/10846: Bead characterized by the chemical composition and or physical properties of elastomers or the like
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer.

## Claims

### Claim 1

A pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer wherein the inner core layer does not contact the rigid rim; wherein the outer skin layer is constructed from a rubber composition comprising from 50 to 75 phr of reinforcing carbon black and the inner core layer is constructed from a rubber composition comprising from 30 to 40 phr of reinforcing carbon black.

### Claim 2 (depends on 1)

The pneumatic tire of claim 1, wherein the rubber composition of the inner core layer further comprises from 5 to 20 phr of ultra high molecular weight polyethylene.

### Claim 3

A pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer wherein the inner core layer does not contact the rigid rim;
wherein the outer skin layer is constructed from a rubber composition consisting of
100 phr of at least one rubber containing olefinic unsaturation;
from 50 to 75 phr of reinforcing carbon black;
at least one additive selected from the group consisting of sulfur donors, accelerators, retarders, oils, resins, tackifying resins, plasticizers, silica, ultra high molecular weight polyethylene (UHMWPE), pigments, fatty acids, zinc oxides, waxes, antioxidants, antiozonants, peptizing agents, and sulfur containing organosilicon compounds; and
the inner core layer is constructed from a rubber composition consisting of
100 phr of at least one rubber containing olefinic unsaturation;
from 30 to 40 phr of reinforcing carbon black; and
at least one additive selected from the group consisting of sulfur donors, accelerators, retarders, oils, resins, tackifying resins, plasticizers, silica, ultra high molecular weight polyethylene (UHMWPE), pigments, fatty acids, zinc oxides, waxes, antioxidants, antiozonants, peptizing agents, and sulfur containing organosilicon compounds.