Patents by Inventor Ryuji Izumoto
Ryuji Izumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200180249Abstract: An object of the present disclosure is to provide a tire production method which effectively inhibits the migration of sulfur to a vulcanizing bladder in a process of vulcanizing an unvulcanized tire provided at an inner surface thereof with a member having a high concentration of sulfur. Specifically, a tire production method includes a vulcanization process of vulcanizing an unvulcanized tire which is provided, in at least a portion of the innermost surface thereof, with a high sulfur concentration rubber member made of a rubber composition containing sulfur by ?1.0 parts by mass with respect to 100 parts by mass of a rubber component, wherein the vulcanization process employs a vulcanizing bladder made of a rubber composition for a bladder, which rubber composition contains fluororubber by 50 mass % to 100 mass %.Type: ApplicationFiled: February 18, 2020Publication date: June 11, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Junichi ORIDE, Yasuhiro ODA, Ryuji IZUMOTO
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Patent number: 10011146Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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.Type: GrantFiled: July 29, 2013Date of Patent: July 3, 2018Assignee: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Patent number: 9623702Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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° C. or more.Type: GrantFiled: December 9, 2013Date of Patent: April 18, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Patent number: 9511631Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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° C. or more and 350° C. or less.Type: GrantFiled: December 11, 2013Date of Patent: December 6, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Patent number: 9511632Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) are integrally formed of a synthetic resin material having a bending modulus of elasticity at ?20° C. obtained through a 3-point bending test that is two times or less a bending modulus of elasticity at 60° C. obtained through the 3-point bending test pursuant to ISO 178.Type: GrantFiled: December 11, 2013Date of Patent: December 6, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Publication number: 20150273945Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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 Charpy impact value obtained at 23° C. through a Charpy impact test pursuant to ISO 179-1 of 5 kJ/m2 or more.Type: ApplicationFiled: December 10, 2013Publication date: October 1, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Publication number: 20150273935Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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° C. or more.Type: ApplicationFiled: December 9, 2013Publication date: October 1, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Publication number: 20150258853Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) are integrally formed of a synthetic resin material having a bending modulus of elasticity at ?20° C. obtained through a 3-point bending test that is two times or less a bending modulus of elasticity at 60° C. obtained through the 3-point bending test pursuant to ISO 178.Type: ApplicationFiled: December 11, 2013Publication date: September 17, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Publication number: 20150251492Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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° C. or more and 350° C. or less.Type: ApplicationFiled: December 11, 2013Publication date: September 10, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Publication number: 20150246577Abstract: A non-pneumatic tire includes an attachment body (11) attached to an axle, a ring member (14) including an inner rim (12) fitted onto the attachment body (11) and an outer rim (13) configured to surround the inner rim (12) from the outside in a tire radial direction, and a plurality of connecting members (15) disposed between the inner rim (12) and the outer rim (13) in a tire circumferential direction and configured to connect the rims (12) and (13) to each other, wherein at least a portion of the ring member (14) and the plurality of connecting members (15) 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.Type: ApplicationFiled: July 29, 2013Publication date: September 3, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Fudemoto, Ryuji Izumoto, Hidefumi Kotsubo
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Patent number: 8453683Abstract: A sealing and pump-up device (10) includes: a liquid agent container (18) containing a sealing agent (32); an injection unit (20) that is connected to an outlet (29) of the liquid agent container (18) and has a liquid pressurization and supply chamber (40) and a jig insertion hole (44); a jig (82) that by insertion into the jig insertion hole (44) pierces an aluminum seal (30) by means of a piercing member (62) and closes off the jig insertion hole (44); and a leading end portion (85), of an insertion portion (84), having a step (85A) that catches on an edge (44B) of a jig insertion hole (44) before the jig (82) that has been inserted into the jig insertion hole (44) reaches a piercing position, when the aluminum seal (30) is pierced.Type: GrantFiled: June 9, 2008Date of Patent: June 4, 2013Assignee: Bridgestone CorporationInventors: Masaki Yoshida, Yuji Takeda, Ryuji Izumoto, Yusuke Inoue, Takahiko Kojima
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Patent number: 8201586Abstract: 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.Type: GrantFiled: June 13, 2007Date of Patent: June 19, 2012Assignee: Bridgestone CorporationInventors: Masaki Yoshida, Ryuji Izumoto, Shinichi Iwasaki, Rieko Iwasaki, legal representative
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Patent number: 7981940Abstract: 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.Type: GrantFiled: May 26, 2005Date of Patent: July 19, 2011Assignee: Bridgestone CorporationInventors: Shinichi Iwasaki, Rieko Iwasaki, legal representative, Ryuji Izumoto, Daisuke Sugio
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Patent number: 7960448Abstract: 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.Type: GrantFiled: September 13, 2007Date of Patent: June 14, 2011Assignee: Bridgestone CorporationInventors: Narukuni Hirata, Ryuji Izumoto
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Patent number: 7926521Abstract: 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 apparatus 30 is an apparatus for injecting a sealing agent in a liquid state into a punctured pneumatic tire 38, thereafter, supplying compressed air into the pneumatic tire 38 to elevate an inner pressure thereof. The pump up apparatus 30 includes a sealing agent vessel 34 accommodating the sealing agent, a sealing agent injecting pump 42 for sucking the sealing agent from the sealing agent vessel 34 to feed it to the pneumatic tire 38, and a compressor 44 for pressurizing and sending air to the pneumatic tire 38.Type: GrantFiled: May 19, 2005Date of Patent: April 19, 2011Assignee: Bridgestone CorporationInventors: Ryuji Izumoto, Daisuke Sugio, Masaki Yoshida, Yuji Takeda
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Publication number: 20100224281Abstract: 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.Type: ApplicationFiled: June 13, 2007Publication date: September 9, 2010Applicant: Bridgestone CorporationInventors: Masaki Yoshida, Ryuji Izumoto, Shinichi Iwasaki, Rieko Iwasaki
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Publication number: 20100186849Abstract: A reliably operable sealing and pump-up device with simple jig installation and in which the jig does not come out even when subjected to pressure. The sealing and pump-up device 10 includes: a liquid agent container 18 containing a sealing agent 32; an injection unit 20 that is connected to an outlet 29 of the liquid agent container 18 and has a liquid pressurization and supply chamber 40 and a jig insertion hole 44; a jig 82 that by insertion into the jig insertion hole 44 pierces an aluminum seal 30 by means of a piercing member 62 and closes off the jig insertion hole 44; and a leading end portion 85, of an insertion portion 84, having a step 85A that catches on an edge 44B of a jig insertion hole 44 before the jig 82 that has been inserted into the jig insertion hole 44 reaches a piercing position, when the aluminum seal 30 is pierced. The jig 82 has simple installation and can be reliably operated because the jig 82 does not come out even when subjected to pressure.Type: ApplicationFiled: June 9, 2008Publication date: July 29, 2010Applicant: BRIDGESTONE CORPORATIONInventors: Masaki Yoshida, Yuji Takeda, Ryuji Izumoto, Yusuke Inoue, Takahiko Kojima
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Publication number: 20100108186Abstract: A sealing and pumping device suppressing tipping over while also maintaining space saving characteristics. The sealing and pumping device 10 suppresses tipping over while also maintaining space saving characteristics by having: a liquid agent container 18 for containing a sealing agent and having an outlet for the sealing agent at a lower portion thereof; a compressor unit 12 for generating compressed air; an air supply path for introducing compressed air from the compressor unit 12 to the liquid container 18; a joint hose 78 for introducing sealing agent or compressed air flowing out of the liquid agent container 18 into a tire 100; a casing 11 housing therein at least the liquid agent container 18 and the compressor unit 12; and a lid 124 provided so as to be projectable outside from the casing 11, with another end face 126 of the lid 124 placed on an installation surface on which the casing 11 is placed to suppress the casing 11 from tipping over.Type: ApplicationFiled: December 11, 2007Publication date: May 6, 2010Inventors: Masaki Yoshida, Ryuji Izumoto
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Publication number: 20100099797Abstract: 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 agentType: ApplicationFiled: September 13, 2007Publication date: April 22, 2010Applicant: Bridgestone CorporationInventors: Narukuni Hirata, Ryuji Izumoto
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Patent number: 7589135Abstract: 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·s in a range of +50 to ?20° C.Type: GrantFiled: December 6, 2004Date of Patent: September 15, 2009Assignee: Bridgestone CorporationInventors: Daisuke Sugio, Ryuji Izumoto, Kazuma Nakazawa