Abstract: A pneumatic radial tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, a carcass extending between the bead portions, a belt disposed radially outside the carcass and having a pair of edges, a rubber bead apex disposed in each bead portion and extending radially outwardly from the bead core, portions of the carcass one between each edge of the belt and the maximum tire width position are each provided therein with a rubber spacer disposed between axially adjacent carcass cords so that the cord spacing between the axially adjacent cords is in the range of from 0.55 to 5.5 times the diameter of the cords, whereby steering performance is improved without increasing the tire weight.

Abstract: A pneumatic radial tire having a tread portion, a pair of axially spaced bead portions with a bead core, a pair of sidewall portions, a carcass having a carcass ply of radially arranged cords extending between the bead portions and turned up around the bead cores to form a main portion and two turned up portions, and a bead apex disposed between the main portion and each turned up portion in each bead portion and extending radially outwardly from the bead core, the carcass cords made of twisted organic fiber filaments, the twist number being more than 5 and less than 30 turn/10 cm.

Abstract: A pneumatic tire for high speed and heavy duty use, in which durability of the bead and lower sidewall region is improved. The tire includes: a carcass comprising a radial ply of cords turned up around bead cores from the axially inside to the outside, the carcass cords rubberized with a topping rubber having a 100% modulus of 40 to 70 kg/cm.sup.2, an elongation at rupture of 200 to 350%, and a stress at rupture of 150 to 300 kg/cm.sup.

Abstract: A tire structure with radial carcass reinforcement for heavy vehicles and rticularly a tire bead structure which makes it possible to have, on unmodified rims, sidewalls the radii of curvature of which are sufficiently great to avoid premature fatigue of the constituent reinforcement elements of the carcass as a result of the flexing cycles generated by travel. The said tire structure has at least one bead wire (2) which is located radially to the outside of the rim flange (J) and around which the turn-up (1') of the carcass (1) is formed.

Abstract: An aircraft tire 10 has at least two circumferentially extending reinforcement inserts. At least one pair of reinforcement inserts 90 is located on each side of the tire. Each insert 90 preferably has two cord reinforced members 91, 92 having bias angled cords. The cords are equal but opposite in orientation relative to the cords of the adjacent member. The pairs of reinforced members 91, 92 extend from the bead portions 18, 20 and terminate in a radially upper portion of the sidewalls 14A, 16A. In the preferred embodiment, each bead portion 18, 20 includes three substantially inextensible bead cores 50, 52 and 54. Each pair of members 91, 92 is interposed between a pair of carcass plies 36, 37, 38, 39, 40, 41, 42, 43 on the ply side of the tire 10. This structure can increase tire durability while at the same time achieve a significant weight reduction.

Abstract: A radial tire for aircraft, which aims to prevent damage at the bead portion thereof, wherein the modulus MS of sidewall rubber at 100% elongation, modulus MS2 of 2nd stiffener rubber at 100% elongation, modulus MC of rubber chafer rubber at 100% elongation and modulus MS1 of 1st stiffener rubber at 100% elongation have the relationship of MS<MS2<MC<MS1; and a point C is located between a point A and a point B, where the points A and B are tire surface points which depart from rim flange when the tire is mounted on a normal rim and inflated at normal inflation pressure and loaded with 100% weight and 200% weight respectively of normal load, and the point C is the foot of a perpendicular to the tire surface from the radially outermost point of the 1st stiffener.

Abstract: A pneumatic radial tire for airplanes comprises a toroidal carcass of at least two carcass plies, a tread rubber superimposed on the carcass, and a belt disposed between the carcass and the tread rubber, in which the belt is comprised of a plurality of radially inner belt plies and a plurality of radially outer belt plies, and each of the radially inner belt plies contains cords extending substantially zigzag at a cord angle A of 5.degree.-15.degree. with respect to the equatorial plane in the circumferential direction while axially being bent at both side ends of the ply, and each of the outer belt plies contains cords having a cord angle B larger than the cord angle A. In this tire, the occurrences of standing wave and cut peel off are prevented with the reduction of tire weight.

Abstract: The weight, space and convenience advantages of a run-flat tire can be substantial. This is especially true for the urban-economy car or family type vehicles which have limited space available for a spare tire and inadequate space for the removed flat tire. These vehicles also have higher comfort requirements that must be addressed. The mini-spare solution to the flat tire problem has very limited performance capabilities. Other solutions include major modifications in the rim and/or the tire, which are not cost effective or compatible with a conversion to standard tires on the same rims.The run-flat tire of this invention includes thickened sidewall portions, a belt package with a cap ply, lower sidewall rubber support portions, a specially designed bead seat area with a rim seat ply and three carcass layers. The classical problems of inflated vs. deflated performance tradeoffs in ride comfort, handling, radial stiffness and endurance of the tire are substantially improved.

Abstract: A heavy duty high speed cross ply tire has a carcass composed of at least one aromatic polyamide fiber cord ply, the product T.sqroot.D of the cable twist number T (turns/10 cm) of the belt cord and the square root of the total denier number D (deniers) of the cord is 2.466.times.10.sup.3 to 3.036.times.10.sup.3 and the elongation E (%) at breakage of the belt cord divided by the total denier number D is 7.78.times.10.sup.-4 to 12.22.times.10.sup.-4.

Abstract: A pneumatic radial tire characterized in that:an inner carcass layer is turned up around each bead core from inside to outside in such a manner as to wrap a bead filler therein;a steel cord reinforcing layer is disposed outside the inner carcass layer;an outer carcass layer is disposed in such a manner that it covers the outside of the steel cord reinforcing layer and its end portion extends to at least near the bead core;a second filler is disposed outside the outer carcass layer;the second filler has a hardness below that of the bead filler and within the range of 70 to 93 in terms of JIS hardness;the cord angle of the steel cord reinforcing layer is from 15.degree. to 30.degree.

Abstract: Highly durable radial tires, particularly highly durable radial tires hav a plurality of carcass plies of organic fiber cords and used for light trucks as well as heavy duty vehicles wherein at least one of the plies is composed of polyamide cords having superior heat resistance in a rubber and the remaining plies or ply are composed of polyester cords.

Abstract: A heavy duty-high pressure pneumatic radial tires are disclosed, which each comprise a main reinforcement consisting of a carcass having an up-and-down type toroid radial construction in which a plurality of plies composed of fiber cords arranged in parallel with one another are turned up around a pair of bead cords on the right and left or the tire while the cords are arranged at angles substnatially along radial planes of the tire, at least one ply including a ply to be brought into direct contact with the bead cords being turned up around each of the bead cores from the inside to the outside of the tire and at least one remaining ply being laminated upon the outer side of the turn-up portion formed by the turn-up end portion of said at least one ply, and a belt which surrounds a crown portion of the carcass and is composed of a plurality of layers of parallel organic fiber cords having at least 150 g/d or an initial modulus higher than that of the cords of the carcass while at least one belt layer is lamin

Abstract: A radial ply pneumatic tire (10) has carcass plies (13,14,15) reinforced by cables comprising only yarns of aramid filaments, and belt plies (31-35) reinforced by cables comprising at least two yarns of aramid filaments and a core yarn consisting of at least one polyamide or polyester filament which have at least a partially oriented structure, said aramid yarns being adjacent to one another and twisted about said core yarn but not being twisted together with one another.

Abstract: The invention relates to a pneumatic radial carcass type tire for heavy duty use having an improved reinforcing structure for the bead region. In a tire comprising a four ply radial carcass (1), the two bead regions are each reinforced by a bead core (2) and an axially inner (6) and an axially outer (7) textile reinforcing layer and a rubber apex strip (8). As compared to the prior art, the relatively low rubber apex strip (8) and the resulting low separation point between the first (3) and second (4) set of carcass plies reduces the sheer stresses between these carcass plies while the specific arrangement of the axially inner (6) and axially outer (7) reinforcing layers retains the required stiffness in the bead region (5). A particular durable bead region (5) is thus obtained.

Abstract: A tire, which may be pneumatic or non-pneumatic, having beads which are each provided with an elastic annular member axially and radially inwardly of the associated bead core. The carcass ply is wrapped axially outwards of the bead core and part of the annular member.The tire bead seat has a taper angle which is greater than that of the rim bead seat such that on fitment of the tire to the rim the annular member, and the associated edge of the ply rotate around the bead core and cause the carcass ply to be placed in tension.