Patents by Inventor Isamu Tsumori
Isamu Tsumori 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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Patent number: 9932460Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a liquid resin having a softening point of ?20 to 20° C., wherein the rubber component contains, 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 constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: April 20, 2012Date of Patent: April 3, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Isamu Tsumori, Kenichi Uesaka, Naoya Omura, Tetsuya Kunisawa, Tatsuhiro Tanaka, Kazuyuki Nishioka
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Patent number: 9012560Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a silane coupling agent, wherein the rubber component contains, 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 constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component; and the silane coupling agent contains a mercapto group.Type: GrantFiled: March 22, 2012Date of Patent: April 21, 2015Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Tetsuya Kunisawa, Tsuyoshi Tsuchida, Kenichi Uesaka, Isamu Tsumori, Reika Otake, Noboru Okabe, Naoya Omura, Tatsuhiro Tanaka, Takafumi Taguchi, Kenya Watanabe, Toru Iizuka
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Patent number: 8875765Abstract: The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.Type: GrantFiled: September 14, 2012Date of Patent: November 4, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Isamu Tsumori, Naoya Ichikawa
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Patent number: 8813798Abstract: A rubber composition for a tire, and a pneumatic tire are provided in which the fuel economy, abrasion resistance, and deterioration resistance can be improved in a good balance. The present invention relates to a rubber composition for a tire, containing a rubber component that contains: a modified natural rubber having a phosphorus content of not more than 200 ppm; and butadiene rubber, wherein 60 to 95% by mass of the modified natural rubber and 5 to 40% by mass of the butadiene rubber are contained based on 100% by mass of the rubber component.Type: GrantFiled: March 13, 2014Date of Patent: August 26, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Isamu Tsumori, Naoya Ichikawa
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Publication number: 20140194578Abstract: A rubber composition for a tire, and a pneumatic tire are provided in which the fuel economy, abrasion resistance, and deterioration resistance can be improved in a good balance. The present invention relates to a rubber composition for a tire, containing a rubber component that contains: a modified natural rubber having a phosphorus content of not more than 200 ppm; and butadiene rubber, wherein 60 to 95% by mass of the modified natural rubber and 5 to 40% by mass of the butadiene rubber are contained based on 100% by mass of the rubber component.Type: ApplicationFiled: March 13, 2014Publication date: July 10, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Isamu TSUMORI, Naoya ICHIKAWA
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Publication number: 20130345337Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a liquid resin having a softening point of ?20 to 20° C., wherein the rubber component contains, 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 constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: April 20, 2012Publication date: December 26, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Isamu Tsumori, Kenichi Uesaka, Naoya Omura, Tetsuya Kunisawa, Tatsuhiro Tanaka, Kazuyuki Nishioka
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Publication number: 20130338296Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, 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 constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: April 26, 2012Publication date: December 19, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Mabuchi, Yoshihiro Kagawa, Hiroshi Ito, Tetsuya Kunisawa, Isamu Tsumori, Kenichi Uesaka
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Publication number: 20130303679Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a silane coupling agent, wherein the rubber component contains, 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 constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component; and the silane coupling agent contains a mercapto group.Type: ApplicationFiled: March 22, 2012Publication date: November 14, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tetsuya Kunisawa, Tsuyoshi Tsuchida, Kenichi Uesaka, Isamu Tsumori, Reika Otake, Noboru Okabe, Naoya Omura, Tatsuhiro Tanaka, Takafumi Taguchi, Kenya Watanabe, Toru Iizuka
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Publication number: 20130098523Abstract: The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.Type: ApplicationFiled: September 14, 2012Publication date: April 25, 2013Inventors: Isamu TSUMORI, Naoya ICHIKAWA
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Patent number: 8110056Abstract: A rubber composition used for a tire, in which friction on ice is improved, which includes 0.5 to 30 parts by weight of a filler having at least two protuberances and a non-metal fiber based on 100 parts by weight of a diene rubber.Type: GrantFiled: February 20, 2009Date of Patent: February 7, 2012Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Hiroyuki Kishimoto, Kiyoshige Muraoka, Akira Minakoshi, Isamu Tsumori
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Publication number: 20090152760Abstract: A rubber composition used for a tire, in which friction on ice is improved, which includes 0.5 to 30 parts by weight of a filler having at least two protuberances and a non-metal fiber based on 100 parts by weight of a diene rubber.Type: ApplicationFiled: February 20, 2009Publication date: June 18, 2009Inventors: Hiroyuki KISHIMOTO, Kiyoshige Muraoka, Akira Minakoshi, Isamu Tsumori
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Patent number: 7122090Abstract: The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25° C. the tread has a complex elastic modulus E1 in the tread thickness direction, and the sheet has a complex elastic modulus E? in the extrusion direction and a complex elastic modulus E? in a 90° direction from the extrusion direction, when the rubber composition is made into 2 mm sheets with a roller and these moduli fulfill the following equation, 60?(E1?E?)/(E??E?)×100?100 and the tread has a specific tread rubber hardness.Type: GrantFiled: June 27, 2003Date of Patent: October 17, 2006Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Isamu Tsumori, Akira Minakoshi, Naohiko Kikuchi, Yoshikazu Tanaka, Takuzo Iwata, Norio Taniguchi
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Publication number: 20050155686Abstract: An Assembly of a pneumatic tire and a rim and a sound suppressing body used for the assembly, the assembly wherein the sound suppressing body having a volume (V2) of 0.4 to 20% of the total volume (V1) of a tire inside hollow and formed of a sponge material extending in circumferential direction is installed in the tire inside hollow formed by the tire and the rim; the sound suppressing body comprising a tire side sound suppressing body having a bottom face fixed to the tire or a rim side sound suppressing body having a bottom face fixed to the rim, wherein the area gravity of the tire side sound suppressing body main part exceeding the bead base line of the rim side sound suppressing body is positioned in an area ranging form the middle point of a height form a reference plane to the trip of the sound suppressing body to the reference plane.Type: ApplicationFiled: May 19, 2003Publication date: July 21, 2005Inventors: Naoki Yukawa, Isamu Tsumori, Fumiaki Shiba, Yasuhisa MInagawa
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Publication number: 20050032960Abstract: The present invention provides a rubber composition of a tire, in which friction on ice is improved, and a pneumatic tire using the composition for a tire tread. Specifically, the present invention relates to a rubber composition for a tire comprising 0.5 to 30 parts by weight of a filler having at least two protuberances based on 100 parts by weight of diene rubber and a pneumatic tire using the composition for a tire tread.Type: ApplicationFiled: June 28, 2004Publication date: February 10, 2005Inventors: Hiroyuki Kishimoto, Kiyoshige Muraoka, Akira Minakoshi, Isamu Tsumori
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Publication number: 20040035515Abstract: The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25° C.Type: ApplicationFiled: June 27, 2003Publication date: February 26, 2004Inventors: Isamu Tsumori, Akira Minakoshi, Naohiko Kikuchi, Yoshikazu Tanaka, Takuzo Iwata, Norio Taniguchi
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Patent number: 6463973Abstract: A vehicle tire comprises a tread rubber forming a ground contacting face of the tire; in a range from the ground contacting face to a certain depth, the tread rubber comprising circumferentially extending wide parts made of a carbon-black-reinforced rubber composition and circumferentially extending narrow parts made of a silica-reinforced rubber composition, which wide parts and narrow parts alternate in the tire axial direction; the axial width of each narrow part being in the range of from 0.5 to 1.5 mm; and the number of the narrow parts counted across a ground contacting width of the ground contacting face being in a range of from 3 to 11.Type: GrantFiled: July 7, 2000Date of Patent: October 15, 2002Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Isamu Tsumori
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Publication number: 20020055583Abstract: A pneumatic tire comprises a belt disposed radially outside a carcass in the tread portion, and the belt comprises a ply of monofilament metallic cords rubberized with a topping rubber, the topping rubber including a rubber base, a methylene donor and at least one of resorcinol and resorcinol condensation products.Type: ApplicationFiled: August 29, 2001Publication date: May 9, 2002Inventors: Toru Iizuka, Isamu Tsumori
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Patent number: 6302173Abstract: A tire of which tread rubber comprises a conducive rubber at least partially, the conducive rubber extending from the radially inner surface of the tread rubber to the ground contacting face, and the conducive rubber compounded from 100 parts by weight of diene rubber and 2 to 30 parts by weight of conductive short fibers, the conductive short fibers formed by coating reinforcing short fibers with a conductive substance, and the conductive rubber has a volume resistance of less than 1×108 ohm cm.Type: GrantFiled: May 12, 1998Date of Patent: October 16, 2001Assignee: Sumitomo Rubber Industries, LimitedInventors: Youichi Mizuno, Masato Komatsuki, Isamu Tsumori
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Patent number: 6201049Abstract: A rubber composition which is superior in ozone resistance and is hard to be discolored brown and white which comprises 0.5 to 2.5 parts by weight of a wax containing a component with 45 or more carbon atoms and having an average number of carbon atoms of 28 to 38 and 3.0 to 7.0 parts by weight of antioxidant containing 30 to 100% by weight of N-(1-methylheptyl)-N′-phenyl-p-phenylenediamine per 100 parts by weight of a diene rubber component.Type: GrantFiled: March 26, 1998Date of Patent: March 13, 2001Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Shuichi Sakamoto, Masato Kawase, Noboru Wakabayashi, Isamu Tsumori, Marina Kotani, Yoichi Mizuno
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Patent number: 6184283Abstract: A rubber composition for treads which contains silica and has a low electric resistance and further well-balanced characteristics such as a low rolling resistance, abrasion resistance and good wet performance can be obtained. The rubber composition comprises 40 to 90 parts by weight of silica and 5 to 40 parts by weight of diester of adipic acid based on 100 parts by weight of a diene rubber.Type: GrantFiled: December 21, 1998Date of Patent: February 6, 2001Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Masato Komatsuki, Tetsuya Kunisawa, Isamu Tsumori