Abstract: Provided are a method and a device for fixing a run-flat support body to a pneumatic tire. The method and the device can achieve the prevention of unevenness in the distribution of the lubricant applied to the inner surface of the tire in which the run-flat support body is used, and thus of deterioration in the weight balance of the wheel. In the fixing method, the run-flat support body configured of a pair of elastic rings to be arranged around a rim and an annular shell installed across these elastic rings is fixed to the pneumatic tire which is to be fitted to the rim with the run-flat support body inserted into a hollow part of the tire. The fixing device, for restricting the radial movements of the run-flat support body inserted into the hollow part, is fitted to at least one of bead parts of the pneumatic tire before the pneumatic tire is fitted to the rim so as to coaxially hold the pneumatic tire and the run-flat support body.

Abstract: A run-flat support member having an annular shell for supporting a tread portion when a pneumatic tire is operated in a run-flat condition. The annular shell is formed from a shell body which is annularly curved and has opposite circumferential edges that are butted against each other and are joined. The shell body is structured such that the butted opposite circumferential edges come into contact with each other by forces acting in directions where they are butted against each other.

Abstract: Disclosed is a tire wheel assembly allowed to enhance working efficiency in rim assembling without destabilizing mounting of a run-flat support member, and furthermore, allowed to realize noise reduction by improving a vibration characteristic during normal traveling. The tire wheel assembly is one where, while a pneumatic tire is fitted to a rim of a wheel, inserted into a cavity portion of the pneumatic tire is a run-flat support member formed of a pair of elastic rings fitted to the rim; and an annular shell straddling between the elastic rings. In the tire wheel assembly, inner diameters of the pair of elastic rings are made different from each other to make an inner diameter of one elastic ring fitted to the rim in a back side of the wheel smaller than an inner diameter of the other elastic ring fitted to the rim in a front side of the wheel.

Abstract: The invention provides a tire condition information collection apparatus and a relay apparatus thereof, which corrects a predetermined physical quantity within tire by use of a predetermined physical quantity outside tire in a vicinity of tire to inform of the corrected physical quantity. An air pressure and temperature of tire are detected by a detection apparatus 10 provided in each wheel 2. The detection data is transmitted from the detection apparatus 10 to a relay apparatus 20 disposed in the vicinity of each wheel by electromagnetic wave of a first frequency. When receiving the transmitted data, the relay apparatus 20 detects an atmospheric pressure and temperature in the vicinity of the wheel 2, and transmits the data to a main apparatus 30 along with the detection data received from the detection apparatus 10.

Abstract: Provided is a run flat supporter for pneumatic tire which can be used for a plurality of kinds of pneumatic tires having different tire sizes. The run flat supporter includes an annular shell and elastic rings. The annular shell has an outer peripheral side formed as a tire support surface and an inner peripheral side bifurcated into left and right leg portions. The elastic rings are attached to each of the tips of the left and right leg portions. The run flat supporter is supported on the left and right seats of a rim of a wheel with the elastic rings interposed therebetween. The run flat supporter for pneumatic tire is characterized in that at least one of the left and right leg portions of the annular shell is divided into an outer-diameter-side shell and an inner-diameter-side shell, and the inner-diameter-side shell is connected to the outer-diameter-side shell so as to be displaceable in the tire axial direction.

Abstract: A tire/wheel assembly comprising a wheel having a rim, a pneumatic tire mounted on the rim of the wheel and a noise reduction interior member disposed in the cavity of the pneumatic tire. The noise reduction interior member includes left and right elastic rings fitted to the rim and an annular body attached between the elastic rings. The annular body is configured such that an annular cavity portion surrounded by the noise reduction interior member and the pneumatic tire has a cross-sectional area that varies in a circumferential direction of the tire.

Abstract: Disclosed is a tire/wheel assembly allowed to still further enhance run-flat durability thereof with a simple configuration. A tire/wheel assembly of the present invention is a tire/wheel assembly where a run-flat support member inserted, coaxially with a rim, in a cavity portion of a pneumatic tire. The tire/wheel assembly is formed of a configuration where a retention groove for lubricant on an inner peripheral surface of the pneumatic tire is provided in a manner that the retention groove is faced at least to an apex of the run-flat support member.

Abstract: Disclosed are a pneumatic tire, which exhibits excellent puncture-preventing function while avoiding inconvenience aroused when a sealant layer is formed based on decomposition reaction of polyisobutylene, a process for producing the same and a sealant rubber composition. This pneumatic tire is provided with the sealant layer in a region of the inner surface of the tire which corresponds at least to a tread. The sealant layer is made of an adhesive sealant obtained by heating a rubber composition containing 0.2 to 20 parts by weight of peroxide per 100 parts by weight of a rubber ingredient containing not less than 50 wt. % of polyisobutylene. 5 to 50 parts by weight of a liquid ethylene/?-olefin copolymer, liquid polybutadiene or liquid polyisoprene are added as an adhesive of the sealant layer.

Abstract: The present invention provides a run-flat support body and a tire/wheel assembly whose weights can be respectively reduced. The run-flat support body includes an annular shell and elastic rings, the annular shell having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs, the elastic rings being attached respectively to the legs portions of the annular shell, and the elastic rings being designed to be mounted on a rim of a wheel. The annular shell is formed of a porous structural material having fine voids. The run-flat support body is attached to an inside of a pneumatic tire mounted on the rim of the wheel.

Abstract: Provided are a run-flat supporting body whose durability is enhanced while a large number of through holes are formed in an annular shell thereof, and a tire/wheel assembly. The run-flat supporting body (1) is configured of the annular shell (2) and elastic rings (3) and (3). The annular shell (2) works as a supporting surface on an outer peripheral side, and bifurcates into two leg portions on an inner peripheral side. In addition, the annular shell (2) is provided with a large number of the through holes (4) in wall surfaces thereof. The elastic rings (3) and (3) are attached respectively to the two leg portions of the annular shell (2). The run-flat supporting body 1 is supported on a rim of a wheel with the elastic rings (3) and (3).

Abstract: A tire/wheel assembly comprising a wheel having a rim, a pneumatic tire mounted on the rim of the wheel and a run-flat support member disposed in the cavity of the pneumatic tire. The run-flat support member includes an annular shell and elastic rings. The annular shell has a support surface located radially outward and two leg portions formed radially inward in a straddling state. The elastic rings support the leg portions on the rim. The annular shell is configured such that an annular cavity portion surrounded by the run-flat support member and the pneumatic tire has a cross-sectional area that varies in the circumferential direction of the tire.

Abstract: A sealant rubber composition which forms a spongy tacky sealant layer having moderate viscosity properties; and a pneumatic tire having in the tire main body a tacky sealant layer obtained by heating the rubber composition. The rubber composition comprises 0.2 to 20 parts by weight of a peroxide per 100 parts by weight of polymers comprising 95 to 50 parts by weight of a polymer decomposable with the peroxide and 5 to 50 parts by weight of a polymer crosslinkable with the peroxide.

Abstract: A self-sealing tire according to the present invention includes a pneumatic tire and a puncture sealing layer disposed over a whole tire inner wall surface from one shoulder portion to the other shoulder portion of the pneumatic tire. The puncture sealing layer comprises an annular sponge layer which is impregnated with an adhesive so as to be exposed on a radially outer surface side thereof, and a bonding layer of an adhesive which is provided on a radially outer surface of the sponge layer and is adhered to the tire inner wall surface. The sponge layer is provided in a compressed state. The puncture sealing layer is press attached to the tire inner wall surface by a recovery force of the compressed sponge layer.

Abstract: The invention provides a tire condition information collection apparatus and a relay apparatus thereof, which corrects a predetermined physical quantity within tire by use of a predetermined physical quantity outside tire in a vicinity of tire to inform of the corrected physical quantity. An air pressure and temperature of tire are detected by a detection apparatus 10 provided in each wheel 2. The detection data is transmitted from the detection apparatus 10 to a relay apparatus 20 disposed in the vicinity of each wheel by electromagnetic wave of a first frequency. When receiving the transmitted data, the relay apparatus 20 detects an atmospheric pressure and temperature in the vicinity of the wheel 2, and transmits the data to a main apparatus 30 along with the detection data received from the detection apparatus 10.

Abstract: Disclosed is a tire wheel assembly allowed to enhance working efficiency in rim assembling without destabilizing mounting of a run-flat support member, and furthermore, allowed to realize noise reduction by improving a vibration characteristic during normal traveling. The tire wheel assembly is one where, while a pneumatic tire is fitted to a rim of a wheel, inserted into a cavity portion of the pneumatic tire is a run-flat support member formed of a pair of elastic rings fitted to the rim; and an annular shell straddling between the elastic rings. In the tire wheel assembly, inner diameters of the pair of elastic rings are made different from each other to make an inner diameter of one elastic ring fitted to the rim in a back side of the wheel smaller than an inner diameter of the other elastic ring fitted to the rim in a front side of the wheel.

Abstract: A pneumatic tire having a tread, a sealant layer for prevention of puncturing being provided on the inner surface of the tire in the tread, a rubber cover layer covering the surface of the sealant layer. The rubber cover layer is formed of rubber having a JIS A hardness X of 50 to 70, and has a thickness Y (mm) satisfying the following expression in relation to the hardness X. ?0.025X+2.25?Y??0.025X+3.

Abstract: A tire wheel assembly capable of enhancing the durability in run-flat driving. In the tire wheel assembly, a pneumatic tire is fitted to the rim of a wheel, and a run-flat support composed of an annular shell having a support surface projecting to the outer circumferential side and leg parts extending along both sides of the support surface, and a pair of left and right elastic rings for supporting the leg parts of the annular shell on the rim is inserted into the cavity section of the pneumatic tire. With regard to the tire wheel assembly, a relation (W2?W1)/W1=0.015-0.100 is satisfied assuming that W1 is the interval between abutting points where the pair of left and right elastic rings abut on the inner surface of the tire when the pneumatic tire and the run-flat support are mounted on the rim, and W2 is the interval between the abutting points when the run-flat support is not mounted.

Abstract: A tire/wheel assembly comprising a wheel having a rim, a pneumatic tire mounted on the rim of the wheel and a noise reduction interior member disposed in the cavity of the pneumatic tire. The noise reduction interior member includes left and right elastic rings fitted to the rim and an annular body attached between the elastic rings. The annular body is configured such that an annular cavity portion surrounded by the noise reduction interior member and the pneumatic tire has a cross-sectional area that varies in a circumferential direction of the tire.

Abstract: A tire/wheel assembly comprising a wheel having a rim, a pneumatic tire mounted on the rim of the wheel and a run-flat support member disposed in the cavity of the pneumatic tire. The run-flat support member includes an annular shell and elastic rings. The annular shell has a support surface located radially outward and two leg portions formed radially inward in a straddling state. The elastic rings support the leg portions on the rim. The annular shell is configured such that an annular cavity portion surrounded by the run-flat support member and the pneumatic tire has a cross-sectional area that varies in the circumferential direction of the tire.

Abstract: A pneumatic tire, comprising adhesive sealant applied onto the inner surface thereof, wherein an air barrier membrane is disposed on the inner surface of the tire at least at a tread part, a space part is formed between the air barrier membrane and the inner surface of the tire, and the adhesive sealant is stacked on the space part side surface of the air barrier membrane, whereby an increase in weight can be minimized and a workability in handling the tire can be increased.