Abstract: The present invention provides a tire monitoring system, its monitor receiver, a monitor and a sensor for monitoring conditions of a tire even when a tire is replaced with another tire fixed with a sensor employing a transmission method different from that employed by a monitor. In other words, the present invention has a communication methods table listing more than two types of transmission method information for a data communication between a sensor 100 and a monitor 200 stored in a monitor 200 and enables to set a data communication with any transmission method selected from the transmission methods table available in a tire monitoring system including sensors 100, each of which is provided for each of the tires 300 equipped to a vehicle and wirelessly sends the detected results about conditions of tires 300, and a monitor 200 for monitoring conditions of each of said tires 300 by receiving the detected result sent from each of sensors 100.

Abstract: A pneumatic tire having a film-shaped electronic device on a surface of the tire or inside the tire. The film-shaped electronic device is slidable between sheet-shaped members disposed on both surfaces of the film-shaped electronic device.

Abstract: A sensor device for tire allowing the sensitivity of a traveling state detection switch to be adjusted, wherein tire inside information is detected in the state of the device installed in a tire air chamber and the detected results are transmitted to the outside. The sensor device for tire comprises a movable member swingable outwardly in a tire radial direction by the centrifugal force of the tire when the tire is rotating and a switch detecting a traveling state in conjunction with the movement of the movable member.

Abstract: A sensor system for a tire, which enables the installation condition of a sensor unit in a tire's air chamber to be know. A sensor system where a sensor unit is installed in a tire's air chamber has detecting means for detecting a relative change in the distance between the sensor unit and a position where the sensor unit is installed.

Abstract: A pneumatic tire having a film-shaped electronic device on a surface of the tire or inside the tire. The film-shaped electronic device is slidable between sheet-shaped members disposed on both surfaces of the film-shaped electronic device.

Abstract: A sensor device for a tire, having enhanced transmission capability without disturbing the assembly of a rim to the tire. With itself installed in the tire, the sensor device detects information inside the tire and transmits the result to the outside. The sensor device has a case for receiving an electronic component and an antenna electrically connected to the electronic component and extended to the outside of the case. The fore-end portion of the antenna is made to be displaceable outwardly in the tire radial direction by centrifugal force generated in the rotation of the tire.

Abstract: An installation structure for an electronic component for a tire, where a case for the electronic component attached to a rim well portion can be prevented from being destroyed during attachment and removal of the tire to and from a wheel. In the installation structure, the electronic component received in the case is attached to the rim well portion in a tire air chamber. When the case is subjected to external force applied in the radial direction of the tire, the case is positionally released from a fixed state before it is destroyed by the force.

Abstract: Disclosed is a communication system for a tire, whose receiving antenna is less likely to be damaged even in a case where the antenna is arranged near the tire. In this communication system, a motor vehicle is equipped with a receiver for receiving data from an electronic device installed in a wheel including a tire, and a receiving antenna connected to the receiver. The receiving antenna is covered with a flexible insulator to form an antenna insert body, and the antenna insert body is arranged within a range which allows the data to be accepted.

Abstract: An installation structure of an electronic component for a tire, where the installation structure protects the electronic component from heat produced by a tire and a braking device and enables accurate information about the inside of the tire to be obtained without being affected by the heat sources. In the installation structure, an electronic component housed in a case is installed at an arbitrary installation in the air chamber of a tire and a heat-insulating structure is interposed between the electronic components and the installation position.

Abstract: The present invention provides a tire monitoring system, its monitor receiver, a monitor and a sensor for monitoring conditions of a tire even when a tire is replaced with another tire fixed with a sensor employing a transmission method different from that employed by a monitor. In other words, the present invention has a communication methods table listing more than two types of transmission method information for a data communication between a sensor 100 and a monitor 200 stored in a monitor 200 and enables to set a data communication with any transmission method selected from the transmission methods table available in a tire monitoring system including sensors 100, each of which is provided for each of the tires 300 equipped to a vehicle and wirelessly sends the detected results about conditions of tires 300, and a monitor 200 for monitoring conditions of each of said tires 300 by receiving the detected result sent from each of sensors 100.

Abstract: A tire/wheel assembly, wherein a run-flat support body (3), comprising an annular shell (4) having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs and elastic rings (5) supporting the ends of the legs on a rim, is inserted into a hollow part of a pneumatic tire (2), and wherein the height (A) of the run-flat support body (3) in the cross section thereof is 50 to 60% of the height (SH) of the pneumatic tire (2) in the cross section thereof, and wherein the cross sectional area of the bead cores (7) of the pneumatic tire (2) is 25 to 40 mm2.

Abstract: The invention provides a measuring method of a tread wear amount by using a pneumatic tire in which a mark portion is formed on a part of a tread surface, the mark portion changing its surface shape as wear progresses. Image data of the mark portion is detected, the detected data is inputted in processor means, and then the tread wear amount is determined by use of either ratio referential data of the mark portion inputted in advance and corresponding to the wear amounts of the tread surface, or a formula inputted in advance for computing the wear amount, thereby facilitating automatic measurement of the tread wear amount.

Abstract: A tire air pressure monitoring device includes a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor. The sensor is a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air. The transmitter is enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.

Abstract: A tire/wheel assembly, wherein a run-flat support body (3) comprising an annular shell (4) having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs and elastic rings (5) supporting the ends of the fork-shaped open legs on a rim is inserted into the hollow part of a pneumatic tire (2), and the height (A) of the run-flat support body (3) in the cross section thereof is 40 to 47% of the height (SH) of the pneumatic tire (2) in the cross section thereof.

Abstract: The invention provides a measuring method of a tread wear amount by using a pneumatic tire in which a mark portion is formed on a part of a tread surface, the mark portion changing its surface shape as wear progresses. Image data of the mark portion is detected, the detected data is inputted in processor means, and then the tread wear amount is determined by use of either ratio referential data of the mark portion inputted in advance and corresponding to the wear amounts of the tread surface, or a formula inputted in advance for computing the wear amount, thereby facilitating automatic measurement of the tread wear amount.

Abstract: The present invention provides a tire/wheel assembly and a run-flat support member. A pneumatic tire is fitted to a wheel rim; and the run-flat support member constituted of a circular shell and elastic rings is inserted into a cavity of the pneumatic tire, in which the circular shell has a support surface thereof extended toward the periphery of the tire and leg portions along each side of the support surface, and the elastic rings support the leg portions of the circular shell on the rim. In the tire/wheel assembly, the leg portion of the circular shell is formed to have a sidewall extending in a shell radial direction and a bottom wall that is substantially parallel to a shell axial direction. The elastic ring is attached to the sidewall of the leg portion while being abutted on the bottom wall of the same without an engagement.

Abstract: A data transmission-reception unit which operates by means of energy of a received electromagnetic wave and serves as a main circuit, is provided with a sensor circuit as an additional circuit, and a transponder having a sensor power circuit for supplying electric power only to the sensor circuit is constituted. From a sensor charging circuit of an interrogator, an electromagnetic wave of a lower frequency different from a frequency of electromagnetic wave for data communication is radiated, or loop coil-shaped charging antennas are electromagnetic-coupled to thereby charge a capacitor for the sensor power circuit. Thereby, a secondary battery and the capacitor such as a large scale capacitor can be easily charged from an outside, and further, a power consumption for the capacitor can be restrained.

Abstract: To provide a transponder for tire, in which the physical quantity in an atmosphere within a tire air chamber can be accurately detected by a sensor and which can be vulcanized in a state in which it is embedded in the tire, a tire with the transponder, and a manufacturing method of the tire. According to the present invention, a transponder obtained by hermetically sealing, by a housing, a circuit substrate with the sensor and other electronic components packaged is embedded between an inner liner and a carcass ply. A green tire thus embedded is vulcanized, and after the vulcanization, the tip end portion of a protruded portion of the housing is removed together with part of the tire inner wall surface, and an aperture is formed at a tip end of the protruded portion to communicate an interior of the tire air chamber with the sensor within the housing.

Abstract: A tire air pressure monitoring device includes a sensor which detects a physical quantity relating to tire air pressure, and a transmitter which sends signals detected by the sensor. The sensor is a sound pressure level sensor which detects a sound pressure level inside a tire cavity filled with air. The transmitter is enabled to send the signals only when the sound pressure level detected by the sound pressure level sensor is changed.

Abstract: The present invention provides a tire/wheel assembly and a run-flat support member which can achieve both workability of tire-to-rim fit and durability for run-flat traveling. The tire/wheel assembly is formed as follows: a pneumatic tire is fitted to a wheel rim; and the run-flat support member constituted of a circular shell and elastic rings is inserted into a cavity of the pneumatic tire, in which the circular shell has a support surface thereof extended toward the periphery of the tire and leg portions along each side of the support surface, and the elastic rings support the leg portions of the circular shell on the rim. In the tire/wheel assembly, the leg portion of the circular shell is formed to have a sidewall extending in a shell radial direction and a bottomwall that is substantially parallel to a shell axial direction. The elastic ring is attached to the sidewall of the leg portion while being abutted on the bottom wall of the same without an engagement.