Bridgestone Corporation

Ryuji Izumoto

Yasuhiro Oda

Masaki Yoshida

Hiroyuki Fudemoto

Hidefumi Kotsubo

Shinichi Iwasaki

Daisuke Sugio

Yuji Takeda

Rieko Iwasaki, Legal Representative

Yusuke Inoue

Masayuki Ohashi

Narukuni Hirata

Kazuma Nakazawa

Kentaro Fujino

Teruo Miura

Hideshi Yanagi

Nobumitsu Ohshima

Takahiko Kojima

Koshiro Monji

Junichi Oride

A non-pneumatic tire includes an attachment body () attached to an axle, a ring member () including an inner rim () fitted onto the attachment body () and an outer rim () configured to surround the inner rim () from the outside in a tire radial direction, and a plurality of connecting members () disposed between the inner rim () and the outer rim () in a tire circumferential direction and configured to connect the rims () and () to each other, wherein at least a portion of the ring member () and the plurality of connecting members () are formed of a synthetic resin material having a bending modulus of elasticity obtained through a 3-point bending test pursuant to International Standard ISO 178 of 300 MPa or more, and a breaking strain obtained through a tension test pursuant to International Standard ISO 527-1 and 2 of 3% or more.

Non-pneumatic tire

A non-pneumatic tire includes an attachment body () attached to an axle, a ring member () including an inner rim () fitted onto the attachment body () and an outer rim () configured to surround the inner rim () from the outside in a tire radial direction, and a plurality of connecting members () disposed between the inner rim () and the outer rim () in a tire circumferential direction and configured to connect the rims () and () to each other, wherein at least a portion of the ring member () and the plurality of connecting members () are integrally formed of a synthetic resin material having a bending modulus of elasticity obtained through a 3-point bending test pursuant to ISO 178 of more than 300 MPa and a deflection temperature under a load at 0.455 MPa obtained pursuant to ASTM D648 of 62&#xb0; C. or more.

Non-pneumatic tyre

A non-pneumatic tire includes an attachment body () attached to an axle, a ring member () including an inner rim () fitted onto the attachment body () and an outer rim () configured to surround the inner rim () from the outside in a tire radial direction, and a plurality of connecting members () disposed between the inner rim () and the outer rim () in a tire circumferential direction and configured to connect the rims () and () to each other, wherein at least a portion of the ring member () and the plurality of connecting members () are integrally formed of a synthetic resin material having a bending modulus of elasticity obtained through a 3-point bending test pursuant to ISO 178 of 300 MPa or more and a melting point of 120&#xb0; C. or more and 350&#xb0; C. or less.

A non-pneumatic tire includes an attachment body () attached to an axle, a ring member () including an inner rim () fitted onto the attachment body () and an outer rim () configured to surround the inner rim () from the outside in a tire radial direction, and a plurality of connecting members () disposed between the inner rim () and the outer rim () in a tire circumferential direction and configured to connect the rims () and () to each other, wherein at least a portion of the ring member () and the plurality of connecting members () are integrally formed of a synthetic resin material having a bending modulus of elasticity at &#x2212;20&#xb0; C. obtained through a 3-point bending test that is two times or less a bending modulus of elasticity at 60&#xb0; C. obtained through the 3-point bending test pursuant to ISO 178.

A sealing and pump-up device () includes: a liquid agent container () containing a sealing agent (); an injection unit () that is connected to an outlet () of the liquid agent container () and has a liquid pressurization and supply chamber () and a jig insertion hole (); a jig () that by insertion into the jig insertion hole () pierces an aluminum seal () by means of a piercing member () and closes off the jig insertion hole (); and a leading end portion (), of an insertion portion (), having a step (A) that catches on an edge (B) of a jig insertion hole () before the jig () that has been inserted into the jig insertion hole () reaches a piercing position, when the aluminum seal () is pierced.

Sealing and pump-up device

To prevent a burr, produced from the joint portion by welding between a liquid agent container and an injection unit, from interfering with a boring member inserted into a jig communication passage when the boring member is inserted into the jig communication passage to prevent the obstruction of the piercing action through a sealing member by the edge of the boring member. In the sealing pump-up device, a tubular inner annular memberis integrally formed on the inner peripheral side of a joined portionin an injection unitso as to surround, from an outer peripheral side, a boring memberheld in a jig insertion hole, and a burr housing unitconsisting of an almost cylindrical space is formed between the outer annular memberof a liquid containerand the tubular inner annular member, whereby it is possible to guide the tip end side of a burr, extending from the joint portion between the outer annular memberand a joined portiontoward the inner peripheral side, from moving toward the boring memberside of the burrby means of the tubular inner annular member

Sealing pump-up device

Provided is a method of treating a sealing compound, in order to recover from the inside of a pneumatic tire the sealing compound that was used for repairing a puncture, the sealing compound including an aqueous solution having at least rubber latex dispersed therein, the method comprising: solid-liquid separating, by injecting a treating agent into the inside of a pneumatic tire into which the sealing compound was injected, the treating agent comprising at least one of a salt that is a reaction compound of an acid and a base and/or a water-soluble organic solvent, mixing the treating agent with the sealing compound inside the pneumatic tire, and aggregating and solidifying the rubber latex in the sealing compound.

Method of treating sealing compound and apparatus for treating the same

A method for producing a puncture sealant, including: performing a first mixing to mix an anti-freezing agent and water; performing a second mixing to mix a mixed liquid obtained from the first mixing and a rubber latex; and performing a third mixing to mix a mixed liquid obtained from the second mixing and an adhesive agent.

Method for producing puncture sealant

To be able to simply carry out an operation of repairing a punctured pneumatic tire, to be able to inject a necessary amount of a sealing agent firmly into the pneumatic tire even when the apparatus is used in an inclined state and to prevent clogging of the sealing agent and leakage of a liquid by being pressurized. A pump up apparatusis an apparatus for injecting a sealing agent in a liquid state into a punctured pneumatic tire, thereafter, supplying compressed air into the pneumatic tireto elevate an inner pressure thereof. The pump up apparatusincludes a sealing agent vesselaccommodating the sealing agent, a sealing agent injecting pumpfor sucking the sealing agent from the sealing agent vesselto feed it to the pneumatic tire, and a compressorfor pressurizing and sending air to the pneumatic tire. When the pneumatic tireis punctured, the sealing agent injecting pumpsucks the sealing agent in the liquid state from the sealing agent vesselto inject it to the pneumatic tire, therefore, inside of the sealing agent vesselis not pressurized.

Sealing agent injecting apparatus, sealing agent injecting method and sealing pump up apparatus

A puncture sealing agent includes at least a rubber latex solution, a short fiber and a clay base viscosity improver, the viscosity of the rubber latex solution after addition of the clay base viscosity improver being 3 to 6000 mPa&#xb7;s in a range of +50 to &#x2212;20&#xb0; C.

Puncture sealing agent

Apparatus for repairing punctured tires

Reclaimed rubber having excellent performance is applied for reuse in tires or for asphalt, etc. The reclaimed rubber obtained by devulcanization treatment of vulcanized rubber from discard tires, etc. has a proportion of sol to gel: 10-80%, a weight-average molecular weight (Mw) of the sol by gel permeation chromatography (GPC): 20,000-300,000, and a degree of swelling of the gel: 3.0-20.0. A process for reclaiming the vulcanized rubber is also disclosed.

Reclaimed rubber and process for reclaiming vulcanized rubber

A fiber composite material in which short fibers, such as polyester short fibers, are added to a matrix, such as a cross-linked rubber matrix, is provided, wherein a heat shrinkage ratio of the short fibers is 8% or less at fiber composite material molding temperatures of 140 to 200.degree. C. Also provided is a pneumatic tire in whose tire tread the fiber composite material is used. Such pneumatic tires include pneumatic tires provided with a foamed rubber layer in a tire tread. The foamed rubber layer has an average cell diameter of 10 to 120 .mu.m and an expansion ratio of 3 to 50%. A solid phase rubber portion of the foamed rubber layer includes 5 to 55 parts by weight of carbon black, 55 to 5 parts by weight of silica, and 1 to 15 parts by weight of short fibers to 100 parts by weight of a diene-base rubber component including 70 to 20 parts by weight of natural rubber and 30 to 80 parts by weight of polybutadiene rubber. A surface of the tire tread has a hardness of 52 or less at 0.degree. C. The short fibers have a length which is from 0.5 to 3 mm and which is shorter than a minimum gap between sipes of a tire surface, a diameter of 30 to 100 .mu.m, an aspect ratio of 5 to 100, and a heat shrinkage ratio of 8% or less at 140 to 200.degree. C. On-ice performance of the pneumatic tire of the present invention is excellent.

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Kodaira, Japan

Ryuji Izumoto