Abstract: A pneumatic tire includes, on a tread surface (1) of the tire, at least two longitudinal grooves (2, 3) extending along a tire equator (C), a plurality of transverse grooves (4a to 4d) connecting the longitudinal grooves, and a block row (L5) formed by a plurality of blocks (5a to 5d) extending along the tire equator and defined by the longitudinal grooves and the transverse grooves. Each of the blocks (5a to 5d) includes a reduced thickness portion (6) in an overlapping region (R) where the blocks overlap in projection when the block row (L5) is projected in the circumferential direction, the reduced thickness portion (6) including at least two portions where the thickness of the block gradually decreases.

Abstract: A tire is described that includes a casing defining a cavity and equipped to receive an object, such as an electronic circuit, for example, through use of a two-part attachment, such as a touch-close attachment, of which a first part is fixed to a wall of the casing and a second part can be joined to the first part when placed in contact with the first part to keep the object on the casing in a service position. The first part of the attachment includes connection elements that are an integral part of the wall of the casing of the tire. The connection elements allow these two parts to have freedom to move relative to each other, thereby limiting the transmission of stresses, which affect the wall of the tire, to the object. The connection elements may be loops of flexible thread formed by the extremities of turns of a coiled thread integrated into the wall of the tire during the tire's manufacture.

Abstract: In a pneumatic tire, a single block includes a first sipe and a second sipe each extending in a tire width direction and disposed at a predetermined pitch in a tire circumferential direction. The first sipe and the second sipe include a first sipe portion that has a linear form when the block is viewed planarly, and a second sipe portion that has a zigzag shape when the block is viewed planarly and that connects to the first sipe portion. The first sipe portion includes a pair of sipe wall faces that face each other and have a linear form when viewed as a cross-section from a direction perpendicular to a sipe length direction, and includes a protrusion disposed on a first face of the sipe wall faces and a recess disposed on a second face of the sipe wall faces so as to mate with the protrusion.

Abstract: A tire (10) for driving on ice, comprising: a tread (20) having a rolling surface configured to come into contact with the ground when the tire is rolling along; at least one stud (30) having a longitudinal axis (A-A), a part of the stud projecting from the rolling surface, the intersection between the stud and the plane tangential to the portion of the rolling surface around the stud forming a contour C, that part of the stud that projects from the rolling surface having a minimum cross section Sm, Sm corresponding to the smallest cross section of the said part in any plane containing the radial direction that passes through the point of intersection between the longitudinal axis of the stud and the plane tangential to the portion of the rolling surface around the stud; at least one recess (200) in the tread forming, on the rolling surface, a contour G, the recess being associated with the stud in that the minimum distance D between the contours C and G is less than or equal to 1 cm; in which, for each stud,

Abstract: A pneumatic tire is provided in a tread portion with a center land portion which is defined between center main grooves and whose top surface has a certain area and a maximum axial width of 15% to 19% of a tread width. The center land portion is provided with axial sipes and recesses. The recess extends from the center main groove toward the tire equator, and has a depth of 60% to 80% of the depth of the center main groove. The total area of the recesses is 5% to 9% of the area of the above-mentioned top surface. The center land portion is formed as a substantially continuous rib.

Abstract: A pneumatic radial tire according to the present invention has a tread pattern specifying a tire rotation direction and an optimized shape of a groove wall on a kicking-out side of a lateral groove.

Abstract: A pneumatic tire 1 according to the present invention comprises at least land portion formed by circumferential groove 3,5 extending in circumferential-direction. The land portion includes land portion 11 having groove side wall 17 forming the circumferential groove 3 and land portion 15 having groove side wall 19A forming the circumferential groove 3. The groove side wall 17 and the groove side wall 19A meander in the circumferential-direction in surface view. A groove width of the circumferential groove 3 in width-direction changes in predetermined cycles in the circumferential-direction. The land portion 15 includes wide land portion in which width of the land portion in the width-direction is predetermined width, and narrow land portion in which the width in the width-direction is narrower than the predetermined width. A surface of the wide land portion is provided with recess portion 23 recessed inward in radial-direction from surface of the land portion 15.

Abstract: A tire/wheel structure includes a body, such as an automobile tire, and guide blocks mounted to two sidewalls of the body in a circumferentially arranged cascade series. Each guide block has a side facing a forward rotation direction of the body and forming at least one inclined guide face in such a way that the inclined guide face and an adjacent one of the guide blocks define therebetween a wind-assisting groove, whereby when the body is in a forward rotating condition, the inclined guide faces of the guide blocks and the wind-assisting grooves help enhance airflow guiding, reduce wind resistance, and generating an assistive driving force and when the inclined guide faces of the guide blocks and the wind-assisting grooves are moved to a position in a lower half of the circumference of the body, a follow-the-trend driving assisting force and a moving stabilizing effect are achieved.

Abstract: A pneumatic tire has a unidirectional tread pattern. The land ratio of an imaginary crown region 5A is 0.75 to 0.85. The land ratio of an imaginary middle region 6A is 0.65 to 0.75. Crown axial grooves 4A and middle axial grooves 4B are inclined to the intended tire rotational direction toward the axially inside of the tire. The widths of the crown axial grooves 4A and the middle axial grooves 4B are 4.0 to 7.0 mm. The width of the crown axial grooves 4A is more than the width of a central main groove 3A and less than the width of middle main grooves 3B.

Abstract: A pneumatic tire for heavy load has a tread, circumferential grooves (2) extending continuously in the tread circumferential direction, transverse grooves (5) opening to the circumferential grooves (2) adjacent each other in the tread width direction, and a block (6) defined by the circumferential grooves (2) and the transverse grooves (5) on a surface (1) of the tread. The block (6) is provided with one or more shallow grooves (7-9) having an average groove depth shallower than a groove depth of the circumferential grooves (2) adjacent to the block (6). The average groove depth of the shallow grooves (7-9) is greater than 20% and less than 80% of the groove depth of the circumferential grooves (2). At least one of the shallow grooves (7-9) opens to at least one of the transverse grooves (5) and the circumferential grooves (2) adjacent to the block (6).

Abstract: Provided is a tire whose durability is improved by using, as a reinforcing member, a polyester cord having an improved heat resistant adhesive property to rubber. Provided is a tire in which a rubber-cord complex composed of a polyester cord and a rubber is used as a reinforcing member. The polyester cord is formed by twisting polyester filaments, and then subjecting the twisted filaments to an adhesive agent treatment. The polyester filament is made of a polyester fiber which is composed of a polyester having ethylene terephthalate as a main repeating unit and having an intrinsic viscosity of 0.85 or higher, wherein the amount of terminal carboxy group in the fiber is 20 equivalent/ton or larger, the long period according to small-angle X-ray diffraction is 9 to 12 nm, and a surface treatment agent having an epoxy group is attached to the surface of the fiber.

Abstract: An electronic device, which is intended to be incorporated into a tire, includes an electronic comprises, a conductor, and a support for the electronic component. The support and the conductor are joined together by a first part for attachment of the support and a second part for attachment of the conductor. A rigidifying casing of the device is overmoulded over at least the first part for attachment of the support and the second part for attachment of the conductor. At least one intermediate transition layer is at least partially overmoulded over the rigidifying casing.

Abstract: The present invention provides a pneumatic tire having a carcass 11, at least one circumferential belt layer 17 provided on the outer side in the tire radial direction of the carcass 11, and plural intersecting belt layers 18 provided on the outer side in the tire radial direction of the circumferential belt layer 17, at least one of the plural intersecting belt layers having wider belt width in the tire widthwise direction than the circumferential belt layer 17, comprising: at least one layer of end-portion circumferential belt 15 provided in respective tire widthwise tread end regions on the outer side of the carcass 11 and on the inner side of the circumferential belt layer 17 in the tire radial direction; and at least one layer of slant belt 16 provided in the tire widthwise tread central region on the outer side of the carcass 11 and on the inner side of the circumferential belt layer 17 in the tire radial direction.

Abstract: A tire for a heavy goods vehicle, having a tread having a tread surface provided in the new state with at least one groove delimited by opposing side walls, this groove opening onto the tread surface in a discontinuous manner by way of a plurality of portions that are open towards the exterior of the tread, these open portions having two ends that are extended under the tread surface by channels having inlets connected to the ends of the open portions, these inlets to the channels having a mean surface area S. This tread is such that each open portion on the tread surface is provided at each of its ends with a closure device for partially closing the cross section of the inlets to the channels when the tire is running and for leaving a passage unclosed.

Abstract: A pneumatic tire in which a cavity resonance sound is reduced while punctures are easily repaired with a puncture sealant. The pneumatic tire has a fibrous region where short fibers are bonded onto an inner surface of the tire. A circumferential fiberless region where short fibers are not bonded onto the inner surface of the tire extends circumferentially between both ends of a tread ground contact area.

Abstract: A tire tread having a layered design is provided. In a first layer of the tread, sipes extend transversely to provide traction in the first stage of the wear life of the tread. In a second layer of the tread, the width of the sipes along the circumferential direction is increased to provide for improved traction in a second stage of the wear life. The increased width is provided by a void that opens to a circumferential groove only along one end. Because the void opens only along one end, a decrease in acoustical effects such as drive by noise can be provided.

Abstract: A tire with certain tread features and a method for manufacturing the tread for such a tire are provided. More particularly, a tire and method for manufacturing a tire having a tread portion with sipes that can be of minimal thickness and varying geometries, densities, and profiles may be provided. The sipes can also be hidden until after a period of tread wear has occurred.

Abstract: Both wet weather performance and steering stability performance are achieved. Lateral main grooves (16) formed in a tread (12) extend in a direction intersecting with circumferential main grooves (14) and open onto the circumferential main grooves (14). Water between the tread (12) and a road surface during wet weather running is accordingly discharged through the lateral main grooves (16) to the circumferential main grooves (14). The end portions of the lateral main grooves (16) opening onto the circumferential main groove (14) are provided with intersection portions 18 where first land portions (21) and second land portions (22) adjacent to each other in the tire circumferential direction at a lateral main groove (16) support each other in the tire width direction. The end portions at the circumferential main groove (14) side of the first land portions (21) and the second land portions (22) do not therefore readily tilt over even when a large slip angle is imparted to the tire.

Abstract: Particular embodiments of the present invention include a multi-stage tire tread having two or more wear layers comprising an outer wear layer and one or more inner wear layers arranged within the thickness of the tread below the outer wear layer. One or more outer grooves are arranged within the outer wear layer, while one or more inner grooves arranged within at least one of the one or more inner wear layers. The tread further includes a volumetric void ratio equal to approximately 0.25 to 0.40 in the unworn condition and approximately 0.25 to 0.40 in a worn condition where the outer, ground-engaging side is arranged along one of the inner wear layers in the worn condition, the tread further having a contact surface ratio equal to approximately 0.66-0.72 in the unworn condition and approximately 0.56-0.66 in the worn condition.

Abstract: In a pneumatic tire 10, inclined grooves 120, 170 are formed, the groove 120 with groove depth becoming larger and groove width in circumferential-direction becoming smaller as the groove 120 extends toward the inner side in width-direction, the groove 170 with groove depth becoming larger and groove width in the circumferential-direction becoming smaller as the groove 170 extends toward the outer side in the width-direction. An outer end portion of the groove 120 in the width-direction is continuous with a land portion 110 and an inner end portion of the groove 120 in the width-direction extends toward circumferential groove 22 along an end portion of a land portion 160 in the circumferential-direction. An inner end portion of the groove 170 in the width-direction is continuous with the land portion 160 and the groove 170 extends along an inner end portion of the land portion 110 in the width-direction.