HEAVY-DUTY PNEUMATIC RADIAL TIRE

PURPOSE:To restrain a bead section from being inclined, so as to reduce strain by providing a rubber stock made of three kinds of rubber respectively having specific characteristics between the carcass body of the bead section and the fold-back, and by specifying the thickness of one of the kinds of...

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Bibliographic Details
Main Authors UEDA HIROSHI, BANBA FUMIO, KISHINAMI SHIGETO, YAMAGUCHI HIROSHI
Format Patent
LanguageEnglish
Published 16.05.1989
Subjects
DEVICES OR ARRANGEMENTS RELATED TO TYRES
PERFORMING OPERATIONS
REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL
TRANSPORTING
TYRE CHANGING OR REPAIRING
TYRE INFLATION
VEHICLE TYRES
VEHICLES IN GENERAL
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Summary:PURPOSE:To restrain a bead section from being inclined, so as to reduce strain by providing a rubber stock made of three kinds of rubber respectively having specific characteristics between the carcass body of the bead section and the fold-back, and by specifying the thickness of one of the kinds of rubber. CONSTITUTION:A rubber stock composed of a rubber A adjacent to a carcass body 15 and a bead core 12, a rubber B adjacent to the carcass body 15 and the fold-back 16 and a rubber C adjacent to the rubber B and the fold-back 16 is disposed between the carcass body 15 constituting a carcass 17 and a fold-back 16. Further, the rubber A is set so as to have a 100% modulus of more than 60kgf/cm , the rubber B to have a 100% modulus of 15kgf/cm and a resiliency of 65 to 85, and the rubber C to have a 100% modulus of 35 to 60kgf/cm and a resilience of 50 to 65. Further, the ratio between the overall thickness (a) of the rubber stock and the thickness (b) of the rubber C is set to be in a range from 0.3 to 0.75.
Bibliography:Application Number: JP19870281752