Patents by Inventor Takumi Sekiguchi
Takumi Sekiguchi 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: 20090277553Abstract: Provided are a tire noise reduction device allowing rapid and reliable puncture-repair of a pneumatic tire provided with an annular sound absorbing member on the inner surface of a tread portion of the tire, and a pneumatic tire provided with the tire noise reduction device. The tire noise reduction device includes: the annular sound absorbing member made of a porous material; and a repair liquid permeable layer stacked on an outer peripheral surface of the sound absorbing member. The repair liquid permeable layer has many continuous pores and has a flow resistance lower than that of the porous material. The tire noise reduction device is mounted on the inner peripheral surface of a tread portion of the pneumatic tire.Type: ApplicationFiled: April 13, 2009Publication date: November 12, 2009Applicant: The Yokohama Rubber Co., Ltd.Inventors: Atsushi Tanno, Takumi Sekiguchi
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Publication number: 20090266463Abstract: This invention provides a pneumatic tire (T) including: a tacky sealant layer (5) formed of a rubber component decomposable by a peroxide, and disposed on the inner side of an inner liner (4) in a region corresponding to a tread part (1); and a cover rubber layer (6) covering the inner side of the tacky sealant layer (5). A sheet piece (7) is disposed to traverse an adhesive seal part (Q) and/or (P) at an edge portion of the cover rubber layer (6), while at least one surface of the sheet piece (7) is a release face which can be separated from at least one of the tacky sealant layer (5) and the cover rubber layer (6). A first end of the sheet piece (7) is inserted between the tacky sealant layer (5) and the cover rubber layer (6) while a second end thereof protrudes to the outer side of the adhesive seal part (Q) and/or (P).Type: ApplicationFiled: October 23, 2006Publication date: October 29, 2009Applicants: THE YOKOHAMA RUBBER CO., LTD., HONDA MOTOR CO., LTD.Inventors: Takumi Sekiguchi, Masahito Kanekuro, Tetsuya Mizone
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Publication number: 20080156408Abstract: Provided are a pneumatic tire T and a method of manufacturing the same. The pneumatic tire T includes: a tacky sealant layer 5 which is formed of a rubber component thermally decomposable with a peroxide, and which is disposed on the inner wall surface of the tire at least in a region corresponding to a tread portion 1; a cover rubber layer 6 which covers the tacky sealant layer 5. In the pneumatic tire T, the cover rubber layer 6 is provided with at least one gas vent hole 7a (7b) formed therein. This allows decomposition gas generated from the tacky sealant layer 5 to be discharged through the gas vent hole 7a (7b) to the outside of the tire.Type: ApplicationFiled: March 10, 2006Publication date: July 3, 2008Applicants: The Yokohama Rubber Co., Ltd., Honda Motor Co., Ltd.Inventors: Takumi Sekiguchi, Tetsuya Mizone, Masahito Kanekuro
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Publication number: 20080078489Abstract: 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.Type: ApplicationFiled: October 31, 2007Publication date: April 3, 2008Applicant: The Yokohama Rubber Co., Ltd.Inventors: Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Mitsuru Naito, Yuichi Kobayashi, Koji Watanabe, Tetsuo Ikegami, Satoshi Makino, Naoya Miyawaki, Tetsuya Mizone
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Publication number: 20080060736Abstract: 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.Type: ApplicationFiled: May 9, 2005Publication date: March 13, 2008Inventors: Mitsuru Naito, Takumi Sekiguchi
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Publication number: 20070185269Abstract: 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.Type: ApplicationFiled: March 27, 2007Publication date: August 9, 2007Applicants: THE YOKOHAMA RUBBER CO., LTD., HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Mitsuru Naito, Yuichi Kobayashi, Tetsuo Ikegami, Satoshi Makino, Takayuki Toyoshima, Tetsuya Mizone, Naoya Miyawaki
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Publication number: 20060174991Abstract: 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.Type: ApplicationFiled: July 26, 2004Publication date: August 10, 2006Applicants: THE YOKOHAMA RUBBER CO., LTD., HONDA MOTOR CO., LTD.Inventors: Mitsuru Naito, Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Yuichi Kobayashi, Tetsuo Ikegami, Satoshi Makino, Takayuki Toyoshima
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Publication number: 20060048877Abstract: A pneumatic tire of which self-seal function can be improved while the increase in weight of the tire is minimized. The pneumatic tire having an adhesive sealant layer in the region corresponding to at least a tread portion on the inner side of the tire, the adhesive sealant layer being constituted from a rubber composition containing a rubber component to be decomposed by peroxide and 0.2 to 20 parts by weight of peroxide per 100 parts by weight of the rubber component, in which fibrillated short fibers with an average length of 100 to 5000 ?m are mixed and scattered.Type: ApplicationFiled: January 26, 2004Publication date: March 9, 2006Applicant: THE YOKOHAMA RUBBER CO., LTDInventors: Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Mitsuru Naito, Yuichi Kobayashi, Kouji Watanabe, Satoshi Makino, Takayuki Toyoshima
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Publication number: 20050217780Abstract: 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.Type: ApplicationFiled: July 23, 2003Publication date: October 6, 2005Inventors: Kazuhiro Shimura, Takumi Sekiguchi, Mitsuru Naito
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Publication number: 20050178486Abstract: 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.Type: ApplicationFiled: July 29, 2003Publication date: August 18, 2005Inventors: Kazuhiro Shimura, Takumi Sekiguchi, Mitsuru Naito
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Patent number: 6843289Abstract: 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.Type: GrantFiled: July 15, 2003Date of Patent: January 18, 2005Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kazuhiro Shimura, Takumi Sekiguchi, Mitsuru Naito
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Publication number: 20040194862Abstract: 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/&agr;-olefin copolymer, liquid polybutadiene or liquid polyisoprene are added as an adhesive of the sealant layer.Type: ApplicationFiled: March 3, 2004Publication date: October 7, 2004Inventors: Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Mitsuru Naito, Yuichi Kobayashi, Koji Watanabe, Tetsuo Ikegami, Satoshi Makino, Naoya Miyawaki, Tetsuya Mizone
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Publication number: 20040198910Abstract: 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.Type: ApplicationFiled: February 11, 2004Publication date: October 7, 2004Inventors: Takashi Fukutomi, Takumi Sekiguchi, Issei Nakakita, Mitsuru Naito, Yuichi Kobayashi, Tetsuo Ikegami, Satoshi Makino, Takayuki Toyoshima, Tetsuya Mizone, Naoya Miyawaki
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Publication number: 20040149366Abstract: This invention relates to a tubeless tire capable of obtaining a sufficient sealing property even if application amount of a sealant agent is lessened. Tubeless tire 1 of this invention includes sealant layer 4 formed of the sealant agent so as to adhere firmly to the inside of inner liner layer 3 that keeps the inside of the tire airtightly. And cover layer 5 formed of the elastic body with high permeability adheres firmly to the inside of the sealant layer 4.Type: ApplicationFiled: June 11, 2003Publication date: August 5, 2004Inventors: Satoshi Makino, Takayuki Toyoshima, Koji Watanabe, Takumi Sekiguchi, Takashi Fukutomi, Yoichi Yamaguchi, Mitsuru Naito
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Publication number: 20040016490Abstract: 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.Type: ApplicationFiled: July 15, 2003Publication date: January 29, 2004Inventors: Kazuhiro Shimura, Takumi Sekiguchi, Mitsuru Naito
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Patent number: 6550868Abstract: A damper plate for an automobile wheel by which ride comfort and interior noise characteristics are improved without seriously deteriorating driving stability or unfastening nuts. The damper plate has a structure in which a metal plate and a buffer member are laminated and is inserted between the automobile wheel and an axle.Type: GrantFiled: December 10, 2001Date of Patent: April 22, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Yuichi Kobayashi, Takumi Sekiguchi
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Publication number: 20020070603Abstract: A damper plate for an automobile wheel by which ride comfort and interior noise characteristics are improved without seriously deteriorating driving stability or unfastening nuts. The damper plate has a structure in which a metal plate and a buffer member are combinedly laminated and is inserted between the automobile wheel and an axle.Type: ApplicationFiled: December 10, 2001Publication date: June 13, 2002Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Yuichi Kobayashi, Takumi Sekiguchi