Abstract:
A run-flat tire has a carcass that spans a region between a pair of bead portions, a side reinforcement layer that is provided at a tire side portion that connects the bead portions and a tread portion, an inclined belt layer that is provided at an outer side of the carcass in a tire radial direction so as to span a tire equatorial plane CL, and that is formed by cords that are inclined relative to the tire circumferential direction, and a reinforcement cord layer that is provided at an outer side of the inclined belt layer in the tire radial direction, and only on a half portion of the tire that is located on an inner side in a tire fitting direction of the tire equatorial plane CL, and that is formed by cords that are inclined relative to the tire circumferential direction.
Abstract:
A passenger vehicle pneumatic tire comprising: a carcass; and inclined belt layers and a circumferential belt layer, wherein: the inclined belt layers include at least two inclined belt layers having different tire widthwise widths; an inclination angle θ1 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the widest width and an inclination angle θ2 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the narrowest width satisfy correlations that 30°≦θ1≦85°, 10°≦θ2≦30°, and θ1>θ2; and a tire widthwise width W1 of the inclined belt layer having the widest width and a tire widthwise width W2 of the inclined belt layer having the narrowest width satisfy a correlation that W2≦0.6 W1.
Abstract:
An object is to provide a pneumatic tire having an enhanced high-speed durability without deterioration in steering stability. A pneumatic tire 10 includes a belt 14 and a tread section 16 on an outside of a crown part 12C in this order, and has different negative ratios of the tread section 16 between both sides of a tire equatorial plane 10C. A belt width Ba from a belt end 14I on the higher negative ratio side to the tire equatorial plane 10C and a belt width Bb from a belt end 14E on the lower negative ratio side to the tire equatorial plane 10C satisfy a relationship of Ba>Bb. It is thereby possible to efficiently suppress a shoulder section 18 from projecting due to a centrifugal force during high-speed rolling. It is thereby possible to efficiently reduce a strain and a heat generated in a rubber member of the shoulder section 18, and efficiently enhance high-speed durability. Further, by ensuring that a grounding width on an OUT side is equivalent to that of a conventional one, it is possible to prevent deterioration in steering stability.
Abstract:
A chip resistant pneumatic tire (10) is provided. The tire has an original reinforced rubber sheet (22, 22b) embedded in or under its tread (18) and/or sidewall (20 ), and is used in off the road applications such as mining. Low sulfur rubber (17) is used to coat the organic reinforcement (11), and its shown that such rubber (17) is more compatible with rubber used to form the tread (18) or sidewall (20), which together with the organic reinforcement (11), helps prevent chipping and chunking in the tread (18) and sidewall (20). The illustrated organic filaments of cords (11) have a round cross section and are at least 2000 denier (2200 dTex) and have a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 20 g/denier (177 cN/Tex), an elongation at break of at least 10%, and a shrinkage of at most 10%.
Abstract:
A pneumatic tire (1) comprises a radial carcass (2), a tread portion (7) and a belt reinforcing structure (8) extending circumferentially around the carcass (2). Disposed radially outwardly of the belt reinforcing structure (8) is a textile reinforced overlay structure (9) having substantially circumferentially extending cords (10). The overlay structure (9) is composed of a series of helical convolutions of a textile ribbon (11) whereby adjacent helical convolutions of the textile ribbon (11) overlap. There is further disclosed a method of applying multiple layers of a single continuous helically wound textile ribbon (11) in a single continuous operation from one axial side to the other axial side of the belt reinforcing structure (8).
Abstract:
A cord inclination angle of the outermost belt layer of a tire on the right side with respect to a tire running direction is arranged in such a manner as to be inclined leftwardly downward in the tire running direction while the cord inclination angle of the outermost belt layer of the left tire is arranged in such a manner as to be inclined rightwardly downward in the tire running direction. In addition, projecting bent portions of lug grooves on a tread pattern of a tire grounding surface are disposed outside from the center of a tread exploded width in the tire running direction.
Abstract:
An asymmetrical belt for a radial carcass pneumatic tire comprises two steel plies of which one ply is a single cut ply and the other ply is a folded ply comprising a main body portion and a radially outwardly folded portion. The two plies are arranged such that the single cut ply is situated radially outwardly of the folded ply with one end portion lying within the bite formed by the fold of the folded ply. The belt configuration further comprises a textile ply which extends across the median portion and the non enclosed end portion of the single cut ply. The textile ply is preferably composed of parallel cords making an angle of not more than 10.degree. with the mid-circumferential plane of the tire.
Abstract:
A tire with an asymmetric radial carcass reinforcement is improved due to the fact that on the side of the median plane of the beads which corresponds to the sidewall having the greatest curvature there is arranged a block for limiting the swing of the crown, this swing-limiting block being interposed between the radial carcass reinforcement and the tread reinforcement in the zone of parallelism between these two reinforcements. An expansion-limiting block is arranged on the other side of the median plane of the beads.
Abstract:
A tire of the radial or crossing ply carcass type with an asymmetric tread reinforcement is improved due to the fact that a correction block is interposed between the assymetric tread reinforcement and the carcass reinforcement. This correction block consists of two plies of wires or cables which form with the longitudinal direction angles of opposite sign, each both other than zero and less than one-third of the smallest angle used in the asymmetric tread reinforcement. The correction block is preferably centered on the equatorial plane of the tire.
Abstract:
The pneumatic tire has a reinforcing belt that is asymmetric with respect to the equatorial plane of the tire. The reinforcing belt includes a ply folded to form confronting main and auxiliary portions, with the fold being situated at an axially internal edge of the tire. Other embodiments of the reinforcing belt include a supplementary ply preferably positioned adjacent the auxiliary ply.Further embodiments of the tire include a tread having sculpture characteristics that differ from the axially internal side of the equatorial plane to the axially external side thereof, with provision for the reinforcement belt to be of lesser diameter at an axially external edge of the tire than at an axially internal edge thereof.