Abstract:
Tire (1) for a heavy vehicle of construction plant type with tread (2) comprising raised elements (3), separated by grooves (4), extending radially outwards from a bottom surface (5) as far as a contact face (6) over a height (H) and comprising base compound (9) and coating compound (10). Coating compound (10) has a constant maximum thickness (emax), at the contact face (6) of each raised element (3), at most equal to 0.15 H, the coating compound (10) has a constant minimum thickness (emin), at each groove bottom (8), at least equal to 0.04 H, and the elongation at break at 23° C. AR2 of the coating compound (10) is at least equal to 1.05 times the elongation at break of 23° C. AR1 of the base compound (9).
Abstract:
The disclosure relates to a tread band made of rubber-like material for a tire for winter travel. The tread band comprises a plurality of blocks with each block including a contact face designed to come into contact with the ground when the tire travels, the contact face having a plurality of sipes lot fined therein and a plurality of fine grooves shallower than the sipes. Each block includes a least one lateral face, this lateral face is covered by a covering material, the covering material having a modulus of elasticity which is greater than the modulus of elasticity of the rubber-like material forming the block.
Abstract:
The present invention is directed to a tire comprising a tread comprising: a plurality of circumferential grooves separating circumferential ribs, each groove comprising a bottom and two sidewalls; one or more groove reinforcements, each groove reinforcement laterally spaced from any other of said one or more groove reinforcements; wherein each groove reinforcement is arranged adjacent one circumferential groove; wherein at least one circumferential groove has no groove reinforcement adjacent to it; and wherein each groove reinforcement extends from the radially inner surface of the tread in a radially outward direction at least to the bottom of the adjacent circumferential groove to form at least part of the bottom of that groove.
Abstract:
The present invention relates to a tire tread comprising a plurality of circumferential grooves separating circumferential ribs, each groove comprising a bottom and two sidewalls, and a plurality of laterally separated reinforcements, wherein one reinforcement is arranged adjacent each circumferential groove, and wherein each reinforcement extends from the radially inner surface of the tread in a radial direction at least to the bottom of an adjacent circumferential groove to form the bottom of that groove. Further, the invention relates to a tire comprising a tread in accordance with the present invention.
Abstract:
A tire tread having: a plurality of tread pattern elements comprising lateral faces and a contact face which is intended to be in contact with the road surface when a tire provided with this tread is being driven on, the extent of the contact between the contact face and the ground forming at least one edge corner, a plurality of cuts in the form of grooves and/or sipes, said cuts being delimited by opposing lateral faces, each tread pattern element being formed with at least one first rubber compound (referred to as “base compound”), this tread having, viewed in section in a plane containing the thickness of the tread, at least one face delimiting at least one cut covered at least in part with a layer of a covering material, this tread being characterized in that the covering material is a thermoplastic material.
Abstract:
The present invention relates to a tire tread comprising a plurality of circumferential grooves separating circumferential ribs, each groove comprising a bottom and two sidewalls, and a plurality of laterally separated reinforcements, wherein one reinforcement is arranged adjacent each circumferential groove, and wherein each reinforcement extends from the radially inner surface of the tread in a radial direction at least to the bottom of an adjacent circumferential groove to form the bottom of that groove. Further, the invention relates to a tire comprising a tread in accordance with the present invention.
Abstract:
This invention discloses a tire having enhanced wet traction and ice traction characteristics. These tires are comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, wherein the tread includes at least one circumferential groove which separates circumferential ribs, each circumferential groove having two sides and a base therebetween, and wherein the sides of each circumferential groove are comprised of a rubbery composition that includes silicate microflakes which are substantially aligned in an orientation which is parallel with the sides of the grooves.
Abstract:
A tire tread includes a plurality of elements in relief (rib and/or block) having lateral faces, and a contact face intended to come into contact with the roadway during travel. The intersection of each lateral face with the contact face forms a ridge. The tread also includes a plurality of cutouts each defined by opposing main faces. Each tread pattern element is formed with at least one base mix. As viewed in section in a plane containing the thickness of this tread, at least one face defining at least one cutout is formed at least in part with a covering mix. The base mix exhibits a gripping action on wet ground which is lower than a gripping action of the covering mix on the same ground.
Abstract:
A bond of a rubbery component to a virgin surface of a tire's cured innerliner which virgin surface has never been contaminated by the remnants of a release agent left after buffing with a wire brush and solvent-cleaning the cured innerliner, is unexpectedly stronger than a bond of the component to the contaminated but nullcleaned surfacenull, cleaned as indicated. As an alternative, buffing with a wire brush results in a textured surface that impairs adhesion of a balance pad. Therefore, a pneumatic tire is provided with a virgin surface protected against contamination by a release agent at the curing temperature of the tire; protection is provided by a self-supporting barrier film of sulfur non-vulcanizable, expandable, thermoformable synthetic resinous material; and, a method is provided for maintaining a virgin cured surface within all or part of either the exterior or interior of a pneumatic tire's rubber carcass which is conventionally cured. The barrier film which is substantially inextensible at ambient temperature, is removable without tearing into pieces from the protected surface of the cured tire. When the interior surface is provided by an innerliner, any component to be included within the interior of the carcass may be adhesively secured to the virgin surface of the innerliner more securely than has been heretofore possible.
Abstract:
In a pneumatic tire, a uneven wear-preventing narrow groove 4 is formed on a tread surface 2a extending from a tread edge E in a tire circumferential direction inside a tire axial direction at a small distance L. At least a groove bottom surface 4b of the narrow groove 4 and an outer groove wall surface 4o outside of the tire axial direction are formed of crack-resistant layers 9 made of crack-resistant rubber material Cg having excellent crack-resistance. A thickness t1 of the crack-resistant layer 9 perpendicular to the groove bottom surface 4b at right angles in a tire radial direction is set to 1 to 5 mm, and a thickness t2 perpendicular to the outer groove wall surface 4o at right angles is set to 1 to 6 mm.