Invention Grant
- Patent Title: Tire with improved beads
- Patent Title (中): 轮胎改良珠
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Application No.: US13983002Application Date: 2012-01-26
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Publication No.: US09205709B2Publication Date: 2015-12-08
- Inventor: Francois-Xavier Bruneau , Frederic Bourgeois
- Applicant: Francois-Xavier Bruneau , Frederic Bourgeois
- Applicant Address: FR Clermont-Ferrand CH Granges-Paccot
- Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN,Michelin Recherche et Technique S.A.
- Current Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN,Michelin Recherche et Technique S.A.
- Current Assignee Address: FR Clermont-Ferrand CH Granges-Paccot
- Agent Cozen O'Connor
- Priority: FR1150715 20110131
- International Application: PCT/EP2012/051224 WO 20120126
- International Announcement: WO2012/104196 WO 20120809
- Main IPC: B60C15/00
- IPC: B60C15/00 ; B60C15/06

Abstract:
Tire comprising a carcass reinforcement and two beads, each comprising at least one annular reinforcing structure, a bead filler and an outer strip made from a rubber composition having an elastic modulus G′ of less than or equal to 15 MPa and a viscous modulus G″ such that G″ [MPa]≦0.2·G′ [MPa]−0.2 MPa, wherein the bead filler has a thickness E(r) perpendicular to the carcass reinforcement with the bead filler, r denoting the distance from the radially innermost point of the annular reinforcing structure, wherein the assembly formed by the bead filler and the outer strip has a thickness ET(r), wherein the thickness ET(r) changes such that, in the range of distances r comprised between 25 and 45% of the height H of the tire, the variation in thickness is less than or equal to −0.25 mm/mm over at least 4% of the height H, wherein, for all the points of which the distance r is greater than 10% and less than 35% of the height H, the ratio E(r)/ET(r) is greater than 0.3 and less than or 0.5, wherein, in any radial section, the bead filler has a cross section of area S1 and the outer strip has a cross section of area S2, the ratio S1/(S1+S2) being greater than 0.4 and less than 0.6, and wherein the annular reinforcing structure has a maximum axial width DE such that the ratio ET ( r ) max - DE ET ( r ) max , where ET(r)max is the maximum value of the thickness ET(r), is less than 10%.
Public/Granted literature
- US20140014250A1 Tire with Improved Beads Public/Granted day:2014-01-16
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