Patents by Inventor Masako Nakatani

Masako Nakatani 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: 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
  • Publication number: 20200047559
    Abstract: Provided is a pneumatic tire that provides a balanced improvement of handling stability and grip performance. The pneumatic tire includes a tread portion that has at least three main circumferential grooves extending in the tire circumferential direction and at least four land portions separated by the main circumferential grooves and including shoulder land portions located on the axially outermost sides of the tire, at least one of the shoulder land portions having horizontal shoulder grooves extending in the tire axis direction, each horizontal shoulder groove having, in the tread contact area, a tire axial length of 10-30% of TW and a tire circumferential distance between the adjacent horizontal shoulder grooves of 20-60% of TW, the shoulder land portions including a rubber composition containing, per 100 parts by mass of the rubber component, at least 40 parts by mass of carbon black and at least 30 parts by mass of silica.
    Type: Application
    Filed: July 24, 2019
    Publication date: February 13, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Masako NAKATANI
  • 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: 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
  • Patent number: 9790359
    Abstract: Provided are a tread rubber composition that can achieve a balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire including the composition.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: October 17, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yoji Imoto, Masato Kawase, Masako Nakatani, Ryuichi Tokimune, Akinori Nagae
  • Patent number: 9745454
    Abstract: Tire having improved wet grip performance and improved resistance to breaking or chipping along with good fuel economy. The tire includes a tire component (preferably, a tire tread) formed of a vulcanized rubber composition. The vulcanized rubber composition is obtained by vulcanizing a specific unvulcanized rubber composition. The unvulcanized rubber composition comprises (a) a rubber component composed of natural rubber, polybutadiene rubber, and two different types of styrene-butadiene rubber, (b) a filler that includes silica, and (c) a silane coupling agent that incorporates a —C(?O)—S— moiety.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: August 29, 2017
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Masako Nakatani
  • 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
  • Publication number: 20160090475
    Abstract: The present invention provides a tire having improved wet grip performance and improved breaking properties while ensuring fuel economy. The present invention relates to a tire including a tire component formed of a vulcanized rubber composition obtained by vulcanizing a specific unvulcanized rubber composition.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 31, 2016
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Masako NAKATANI
  • Publication number: 20150099823
    Abstract: Provided are a tread rubber composition that can achieve a balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire including the composition.
    Type: Application
    Filed: June 7, 2013
    Publication date: April 9, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yoji Imoto, Masato Kawase, Masako Nakatani, Ryuichi Tokimune, Akinori Nagae