Innovations for Enhanced Tire Grip

Winter tire rubber composition provides improved grip on ice and reduced rolling resistance compared to conventional winter tire compounds. The composition contains specific ratios of 3 types of rubber with different glass transition temperatures, high amounts of low Tg plasticizers, and high levels of silica filler. The rubber types are low Tg polybutadiene, medium Tg polybutadiene, and polyisoprene. The silica provides grip and rolling resistance benefits. The low Tg plasticizers keep the rubber flexible at low temperatures. The composition is free of styrene-butadiene rubber.

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A cross-linkable rubber composition for tire treads with improved rolling resistance and wet grip. It contains natural rubber or isoprene rubber, syndiotactic 1,2 polybutadiene, and carbon black filler. The key is using a small amount of syndiotactic 1,2 polybutadiene rubber along with carbon black. This provides a balance of wet grip and rolling resistance properties when cured, without compromising either.

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Tire tread design with sipes that maintain performance as the tire wears. The tread has sipes with three different depths, forming three levels in the tread blocks. The shallowest sipes are at the top level and the deepest sipes are at the bottom level. This allows the sipes to maintain their biting edges and void volume as the tread wears down, improving wet and snow traction over the life of the tire. The staggered depth levels also prevent damage or tearing when the mold is removed from the tread during manufacturing.

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Motorcycle tire with optimized steel cord configuration and tread rubber composition to improve steering stability during high-speed turning. The tire uses a specific steel cord configuration of twisted strands of 1-3 filaments twisted together, with filaments of 0.15-0.25mm diameter. This provides lower compression and bending stiffness compared to conventional steel cords. The tread rubber has an elevated dynamic modulus (>5 MPa at 70C) to enhance responsiveness. The optimized steel cord and tread rubber work synergistically to improve steering stability during high-speed turning.

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Tire construction for a motorcycle tire that provides improved turning performance and durability compared to conventional motorcycle tires. The tire has a tread reinforcing layer with specific belt and band ply orientations and widths. The inner belt ply has cords angled greater than 5 degrees to the tire circumferential direction. The outer belt ply has cords angled greater than 5 degrees but with a wider width than the inner belt ply. The band ply has cords angled less than or equal to 5 degrees. This combination of belt and band ply angles and widths optimizes cornering force distribution and reduces tire wear for improved turning performance and durability.

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Low-profile tire design for oversized wheels that allows them to be used for racing applications on raceways while also being legal for use on public highways. The design aims to provide maximum traction, steering, stopping, and handling performance for racing, while still meeting safety standards for highway use.

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A pneumatic tire design that enhances steering stability and crack growth resistance in cold temperatures. The tire uses a specific rubber composition for the inner liner and tie rubber. The inner liner rubber contains carbon black, resin, and zinc oxide in specific amounts along with halogenated butyl rubber. The tie rubber contains diene rubber matching adjacent layers. These compositions balance hardness, adhesion, and low-temperature properties to optimize tire performance.

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Winter tire tread design with improved snow traction in both new and worn states. The tread has three radial zones with different rubber compositions. The outer zone has low sulfur and accelerator amounts. The inner zone has high sulfur and accelerator amounts. The middle zone has intermediate sulfur and accelerator amounts. This composition gradient provides the best balance of new and worn snow traction. The tire has a better initial snow grip and maintains grip as it wears compared to conventional tires.

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Winter tire tread formulation with good cold-weather performance and excellent traction on wet, snow-covered, and icy roads. The tread uses a combination of high and low Tg elastomers with silica and carbon black fillers. The elastomers are solution SBR, emulsion SBR, and cis-polybutadiene rubber. The silica has reduced coupling agent levels and increased silanization times to improve hysteresis and abrasion resistance. The tread can also contain vegetable oil extension of the elastomers for further cold weather flexibility.

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Rubber compositions with improved friction and grip force for shoe soles, tires, etc. The compositions contain a specified lignin compound and an amine compound along with the rubber. The lignin is denatured lignin from biomass sources. The amine is a long-chain alkyl amine. The lignin and amine additives enhance the frictional properties of the rubber when compared to normal rubber compositions.

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Tire design for improved traction on snow. The tire has shoulder grooves with protrusions that extend radially from the tire surface. The protrusions have a U-shape, with two arms on the shoulder blocks and a connecting arm in the groove. This configuration improves snow traction by providing additional biting edges when the tire contacts the snow surface.

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Agricultural vehicle tires with lugs that have features to improve traction and reduce stubble damage. The lugs have a discontinuity on the leading face of the outer end to allow residual stubble to be expelled from the tread. They also have a discontinuity on the trailing face that extends inwards towards the adjacent lug to reduce attack points.

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System to warm up all driven wheels of all-wheel-drive vehicles for better tire performance by using line-lock mode. The system involves a controller that selectively brakes and powers the wheels in a specific sequence to warm them up. This involves braking one wheel while powering the opposite wheel, and then swapping to brake the other wheel and power the first wheel. The controller alternates braking and powering the wheels in phases to warm them up.

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A tire design that improves braking performance while reducing uneven wear. The tire has a tread with a lateral groove to expel water. The groove has an inclined surface on the groove opening and an opposing inclined surface internally. The angle of the outer inclined surface is 15-30 degrees and the inner inclined surface angle is 5-25 degrees. These angles concentrate braking forces away from the groove opening to reduce uneven wear.

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A tire with zigzag sipes in the tread allows for better traction on snow and ice when the tire is worn. The zigzag sipes have a changing amplitude from the sipe opening to the maximum depth, with the maximum amplitude not at the opening. This ensures that as the tire wears, the exposed sipe edges still provide biting edges for traction.

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A pneumatic tire design that balances traction on snowy surfaces with dry road performance. The tire has a specific sipe configuration where sipe lengths are controlled on certain areas of the tire. This prevents excessive sipe deformation and maintains land rigidity on dry surfaces while allowing sipes to widen for improved snow traction.

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Tire tread design for improved noise performance and driving on unpaved roads. It has main grooves, shoulder lug grooves, center lug grooves, and connecting grooves. The center lug grooves extend across the main grooves in a zigzag pattern with alternating reaching the tire equator and terminating early. The center lug grooves are inclined at 45-70 degrees to the tire width. The connecting grooves connect the center lug grooves and are inclined in the opposite direction. This provides traction, drainage, and noise benefits on unpaved roads.

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A tire with improved resistance to chipping on bad roads at high speed. The tire has a tread with one or more circumferential main grooves that bend and deviate at a bending point. The rubber composition of the tread has specific properties - tan delta at 20C of 0.30 or less, breaking strength at 175C times elongation at 175C divided by 2 equal to or greater than 600.

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A pneumatic tire that exhibits excellent grip performance and durability during high-speed running, and also improved fuel efficiency. The tire achieves this by having tread regions with different thermal conductivities. These regions are made of rubber compositions with high and low thermal conductivity. The high thermal conductivity composition dissipates heat generated during high-speed running, preventing overheating and maintaining grip. The low thermal conductivity composition retains heat and provides durability.

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A tire with improved cornering performance while suppressing deterioration of the noise performance compared to prior art. The tire has chamfered shoulder sipes that are shaped differently at each end. The shoulder sipes have chamfered edges instead of sharp edges which can lift and reduce grip when cornering. The chamfers have a larger chamfer volume near the center of the tire and a smaller chamfer volume at the tread edge. This provides optimized cornering grip and stability while avoiding excessive tread block movement and noise.

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