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OwnerDaniel Roger Fernand Noel, Murat Yasar Ahmet Susutoglu +3inventors
InventorsDANIEL ROGER FERNAND NOEL, MURAT YASAR AHMET SUSUTOGLU, MICHELE MARIE JOSEPH EMILE SPRIET, MUSTAFA GOKSOY, FERNAND ANTOINE JOSEPH FOURGON
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A radial medium radial truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In the preferred embodiment, organic multifilaments are used in the top belt or breaker plies which have the following characteristics: at least a gauge of 420×2 dTex to about 3300×3 dTex, a tenacity of about 35 cN/Tex to about 200 cN/Tex, an initial modulus of at least 30 g/denier (250 cN/Tex) and a shrinkage of about 0.1-10 %. When an organic polymer reinforcement is used in the top belt or breaker in the belt package of a tire, scrapping of tires during a retreading operation because of corrosion is greatly reduced. In addition, acceptance for retreadability is increased because of reduced top belt or breaker damage, allowing for easier preparation for the retreading. Moreover, the invention relates to an improved construction to reduce defects known as blows.
A pneumatic radial medium truck tire characterized by at least one pair of parallel annular beads, at least one carcass ply wrapped around the beads, at least three belts or breakers disposed over the carcass ply in a crown area of the tire, tread disposed over the belts or breakers, and sidewalls disposed between the tread and the beads, wherein the two or three bottom belts or breakers closest to the carcass ply are reinforced with steel filaments or cords, and the top belt or breaker disposed closest to the tread is reinforced with multi-filaments or cords comprised of an organic polymer.
A pneumatic radial medium truck tire characterized by at least one pair of parallel annular beads, at least one carcass ply wrapped around the beads, two to twelve belts or breakers disposed over the carcass ply in a crown area of the tire, tread disposed over the belts or breakers, and sidewalls disposed between the tread and the beads, wherein the majority of the belts or breakers are reinforced with steel filaments or cords, and the remaining belts or breakers are reinforced with filaments or cords comprised of an organic polymer, wherein a polyamide, multi-filament reinforced belt ply wherein the reinforcement cords have an angle of between about 0° to about 70° with respect to the EP of the tire comprises the top ply of the belt package.
Dependencies are inferred from the claim text.