Patents by Inventor Takahiro KAWACHI

Takahiro KAWACHI 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).

  • Publication number: 20200238768
    Abstract: A pneumatic tire 1 comprises a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside of the tread portion 2. The pneumatic tire 1 further comprises a damping rubber body 30 arranged between the carcass 6 and the belt layer 7, and a noise damper 20 arranged on an inner cavity surface of the tread portion 2. A width W1 in a tire axial direction of the damping rubber body 30 is in a range of from 60% to 130% of a width W2 in the tire axial direction of the belt layer 7, and a water absorption rate of the noise damper 20 is in a range of from 10% to 25%.
    Type: Application
    Filed: April 16, 2020
    Publication date: July 30, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Takuya HORIGUCHI, Masataka HIRO, Takayuki NAGASE, Hiroshi ITO, Fumiya KATO, Subaru TOYA
  • Publication number: 20200164701
    Abstract: Puncture repair using a puncture repair liquid is performed quickly and reliably while a noise damper has a single layer structure. A pneumatic tyre is provided with a noise damper made of a porous material having interconnected bubbles on an inner surface of a tread portion. In the noise damper, the number of bubbles is 30 or more and 60 or less/25 mm, and in an arbitrary cross section of the noise damper, a ratio of a total sum of cross-sectional areas of the bubbles to an area of the cross section is 10% or more and 30% or less.
    Type: Application
    Filed: July 25, 2018
    Publication date: May 28, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventor: Takahiro KAWACHI
  • Publication number: 20200164700
    Abstract: To be capable of preventing deterioration of uniformity after puncture repair while suppressing running noise. [Solution] A pneumatic tire 1 comprises a noise damper 20 fixed to a tire inner cavity surface of a tread portion 2 and formed of a porous material. The noise damper 20 includes a first part 23 arranged on an outer side in a tire radial direction and fixed to the tire inner cavity surface 16, and a second part 24 arranged on an inner side in the tire radial direction of the first part 23 and exposed in a tire inner cavity 17. A water absorption rate of the first part 23 calculated by a following formula (1) is in a range of from 5% to 25%. Air permeability of the second part 24 measured in accordance with Japanese Industrial standard JIS-L1096 is in a range of from 1 to 7 cm3/cm2/s. The formula (1) is: water absorption rate (%)=weight change before and after immersion (g)/volume at 50% compression (cm3)×100 (1).
    Type: Application
    Filed: December 6, 2017
    Publication date: May 28, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Nanaho KAMI, Ayuko YAMADA, Takuya HORIGUCHI, Tatsuhiro TANAKA, Keiji TAKAGI, Subaru TOYA
  • Patent number: 10647168
    Abstract: To be capable of preventing deterioration of uniformity after puncture repair while suppressing running noise. [Solution] A pneumatic tire 1 comprises a noise damper 20 fixed to a tire inner cavity surface of a tread portion 2 and formed of a porous material. The noise damper 20 includes a first part 23 arranged on an outer side in a tire radial direction and fixed to the tire inner cavity surface 16, and a second part 24 arranged on an inner side in the tire radial direction of the first part 23 and exposed in a tire inner cavity 17. A water absorption rate of the first part 23 calculated by a following formula (1) is in a range of from 5% to 25%. Air permeability of the second part 24 measured in accordance with Japanese Industrial Standard JIS-L1096 is in a range of from 1 to 7 cm3/cm2/s. The formula (1) is: water absorption rate (%)=weight change before and after immersion (g)/volume at 50% compression (cm3)×100 ??(1).
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: May 12, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Masako Nakatani, Takahiro Kawachi, Nanaho Kami, Ayuko Yamada, Takuya Horiguchi, Tatsuhiro Tanaka, Keiji Takagi, Subaru Toya
  • Publication number: 20200114704
    Abstract: A pneumatic tire 1 includes a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside the tread portion 2. The pneumatic tire 1 has a noise damper 20 arranged on an inner cavity surface of the tread portion 2. Glass transition temperature of the noise damper 20 is in a range of from ?55 degrees Celsius to ?45 degrees Celsius.
    Type: Application
    Filed: December 11, 2019
    Publication date: April 16, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Keiichi NAKADERA, Hiroshi ITO, Shuichiro ONO, Daiki MUKOUGUCHI, Tatsuhiro TANAKA, Tetsuya MAEKAWA, Subaru TOYA
  • Patent number: 10518596
    Abstract: A joint provided with a base part 12, a pair of side parts 14, 14 extending from the two end parts of the base part 12 in the first direction D1 to the same side in the second direction D2 vertical to the first direction D1, the pair of side parts 14, 14 being formed with fastening holes 14H at the center in a third direction D3 vertical to both the first direction D1 and second direction D2, and a closed part 16 formed between the pair of side parts 14, 14 as an extended region of the base part 12 and pair of side parts 14, 14 at least at one end in the third direction D3.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: December 31, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takahiro Aitoh, Takeshi Kawachi
  • Publication number: 20190375250
    Abstract: A pneumatic tire 1 includes a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside the tread portion 2. The pneumatic tire 1 has a noise damper 20 arranged on an inner cavity surface of the tread portion 2. Glass transition temperature of the noise damper 20 is in a range of from ?55 degrees Celsius to ?45 degrees Celsius.
    Type: Application
    Filed: December 12, 2017
    Publication date: December 12, 2019
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Keiichi NAKADERA, Hiroshi ITO, Shuichiro ONO, Daiki MUKOUGUCHI, Tatsuhiro TANAKA, Tetsuya MAEKAWA, Subaru TOYA
  • Publication number: 20190366781
    Abstract: A pneumatic tyre (1) for decreasing running noise in a low temperature environment includes a noise damper (20) made of a porous material and fixed to a tyre inner cavity surface (16) of a tread portion (2). In the noise damper (20), hardness under a 25% compression load measured in accordance with Japanese Industrial standard JIS K6400-2 in an atmosphere of ?60 degrees Celsius is 110 kPa or less.
    Type: Application
    Filed: February 21, 2018
    Publication date: December 5, 2019
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Takahiro KAWACHI
  • Publication number: 20190299722
    Abstract: A pneumatic tire 1 comprises a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside of the tread portion 2. The pneumatic tire 1 further comprises a damping rubber body 30 arranged between the carcass 6 and the belt layer 7, and a noise damper 20 arranged on an inner cavity surface of the tread portion 2. A width W1 in a tire axial direction of the damping rubber body 30 is in a range of from 60% to 130% of a width W2 in the tire axial direction of the belt layer 7, and a water absorption rate of the noise damper 20 is in a range of from 10% to 25%.
    Type: Application
    Filed: November 27, 2017
    Publication date: October 3, 2019
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Takuya HORIGUCHI, Masataka HIRO, Takayuki NAGASE, Hiroshi ITO, Fumiya KATO, Subaru TOYA
  • Publication number: 20190248182
    Abstract: A pneumatic tire 1 comprises a carcass 6 extending between a pair of bead portions 4, 4, an inner liner 10 arranged on an inner side in a tire radial direction of the carcass 6 and forming a tire inner cavity surface 16, and a noise damper 20 made of a porous material and fixed to the tire inner cavity surface 16 of the inner liner 10. A glass transition temperature Tg1 of the noise damper 20 is lower than a glass transition temperature Tg2 of the inner liner 10.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Masataka HIRO, Satomi YAMAUCHI, Shuichiro ONO, Tetsuya MAEKAWA, Natsuki MAEKAWA, Subaru TOYA
  • Patent number: 10369843
    Abstract: According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (CpH2p+1O)3—Si—(CH2)q—S—CO—CkH2k+1, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: August 6, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ayuko Yamana, Yuka Yokoyama, Masako Nakatani, Takashi Miki, Takuya Horiguchi, Yoichi Mizuno, Takahiro Kawachi, Noboru Okabe, Natsuki Sugimoto, Kenichi Uesaka, Tetsuya Maekawa, Yumi Suzuki, Fumiya Kato
  • Publication number: 20190030954
    Abstract: [ solution] A pneumatic tire 1 comprises a carcass 6 extending between a pair of bead portions 4, 4, an inner liner 10 arranged on an inner side in a tire radial direction of the carcass 6 and forming a tire inner cavity surface 16, and a noise damper 20 made of a porous material and fixed to the tire inner cavity surface 16 of the inner liner 10. A glass transition temperature Tg1 of the noise damper 20 is lower than a glass transition temperature Tg2 of the inner liner 10.
    Type: Application
    Filed: December 6, 2017
    Publication date: January 31, 2019
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Masataka HIRO, Satomi YAMAUCHI, Shuichiro ONO, Tetsuya MAEKAWA, Natsuki MAEKAWA, Subaru TOYA
  • Patent number: 10189987
    Abstract: The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: January 29, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kazuyuki Nishioka, Kenichi Uesaka, Takahiro Kawachi, Masako Nakatani, Tatsuhiro Tanaka, Fumiya Kato
  • Publication number: 20180291187
    Abstract: The rubber composition comprises 5 to 30 parts by mass of a terpene resin having a softening point of 100 to 118° C. and a molecular weight of from 500 to 10,000, and 7 to 40 parts by mass of an ?-methyl styrene resin having a molecular weight of from 700 to 3,000, based on 100 parts by mass of a rubber component comprising 60 to 95% by mass of an aromatic olefin rubber and 5 to 40% by mass of a diene olefin rubber, wherein a ratio of a content of the terpene resin to a content of the ?-methyl styrene resin (a content of the terpene resin/a content of the ?-methyl styrene resin) is from 0.2 to 5, and the tire is one having a tire member composed of the rubber composition.
    Type: Application
    Filed: March 23, 2018
    Publication date: October 11, 2018
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kenya WATANABE, Takahiro KAWACHI, Keiji IKEDA
  • Publication number: 20180282532
    Abstract: A rubber composition comprises 5 to 30 parts by mass of a terpene resin having a softening point of 100 to 120° C. and a molecular weight of 500 to 10,000, and 2 to 10 parts by mass of a liquid rubber or a liquid resin having a molecular weight of 100 to 3,500, based on 100 parts by mass of a rubber component comprising 72 to 95% by mass of an aromatic olefin rubber and 5 to 28% by mass of a diene olefin rubber, wherein a ratio of a content of the terpene resin to a content of the liquid rubber or the liquid resin (a content of the terpene resin/a content of the liquid rubber or the liquid resin) is from 0.5 to 5, and the tire is one having a tire member composed of the rubber composition.
    Type: Application
    Filed: March 14, 2018
    Publication date: October 4, 2018
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kenya WATANABE, Takahiro KAWACHI, Keiji IKEDA
  • Publication number: 20180200977
    Abstract: Provided is a pneumatic tire including: a sealant layer located radially inside an innerliner; and a sound-absorbing layer located radially inside the sealant layer, the sealant layer being formed of a generally string-shaped sealant provided continuously and spirally along the inner periphery of the tire, the sound-absorbing layer being attached with the sealant.
    Type: Application
    Filed: October 16, 2015
    Publication date: July 19, 2018
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoki YUKAWA, Mutsuki SUGIMOTO, Takahiro KAWACHI, Satoshi YAMADA
  • Publication number: 20170225512
    Abstract: According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (CpH2p+1O)3—Si—(CH2)q—S—CO—CkH2k+1, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.
    Type: Application
    Filed: November 6, 2015
    Publication date: August 10, 2017
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ayuko YAMANA, Yuka YOKOYAMA, Masako NAKATANI, Takashi MIKI, Takuya HORIGUCHI, Yoichi MIZUNO, Takahiro KAWACHI, Noboru OKABE, Natsuki SUGIMOTO, Kenichi UESAKA, Tetsuya MAEKAWA, Yumi SUZUKI, Fumiya KATO
  • Publication number: 20160264772
    Abstract: The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component.
    Type: Application
    Filed: October 27, 2014
    Publication date: September 15, 2016
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kazuyuki NISHIOKA, Kenichi UESAKA, Takahiro KAWACHI, Masako NAKATANI, Tatsuhiro TANAKA, Fumiya KATO