Patents by Inventor Tomohiro Kusano

Tomohiro Kusano 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: 20070221310
    Abstract: A pneumatic tire which offers extremely excellent durability through inclusion of a belt portion composed of a rubber composition having excellent reinforcing properties, high hardness, low heat build-up properties, excellent deterioration resistance, and excellent adhesiveness to steel cords, wherein the rubber composition contains a natural rubber prepared by graft polymerizing a natural rubber latex with a polar group-containing monomer, and solidifying and drying the resulting product. A pneumatic tire which offers excellent rolling resistance through inclusion of a ply coating rubber, squeegee rubber, or tie rubber composed of a rubber composition containing a modified natural rubber prepared by graft polymerizing a natural rubber latex with a polar group-containing monomer, and solidifying and drying the resulting product.
    Type: Application
    Filed: May 17, 2007
    Publication date: September 27, 2007
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Kenichi Hattori, Kentarou Mitsui, Tomohiro Kusano
  • Publication number: 20050236087
    Abstract: A tire which has a bead filler (5) arranged on the outside in the tire radius direction of one pair of bead sections provided at the right and left thereof, one pair of side wall sections (6) provided in the right and left of a tread section, and a rubber reinforcing layer (7) arranged in the side wall section (6), characterized in that the rubber composition constituting the bead filler (5) or the rubber reinforcing layer (7) comprises a conjugated diene based polymer having a vinyl bond content of 25% or more, a weight average molecular weight (Mw) of 200,000 to 900,000 and a molecular weight distribution (Mw/Mn) represented by the ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn) of 1 to 4 in an amount of 50 mass % or more of the rubber component thereof, and a resin and a curing agent therefor in a total amount of 3 parts by mass or more relative to 100 mass parts of the rubber, and exhibits a modulus of elasticity at 100% elongation at 25° C.
    Type: Application
    Filed: August 7, 2003
    Publication date: October 27, 2005
    Inventors: Tomoyasu Nishizaki, Tomohiro Kusano
  • Patent number: 6736174
    Abstract: In a pneumatic tire of the present invention, a tread reinforcing rubber layer composed of a rubber having larger tensile modulus of elasticity than that of a rubber composing the tread rubber layer and is less stretchable is provided in a thickness direction central area of a tread rubber layer. Because the tread reinforcing rubber layer diminishes the amount of lateral expansion and the amount of vertical compressive deformation when the tread rubber layer contacts the ground, generation of heat in the tread rubber layer can be suppressed. Therefore, in the present invention, the unique tread structure reliably suppresses heat-generation and the rubber of the tread rubber layer exhibits excellent tire wear resistance. As a result, suppression of heat-generation and high tire resistance can readily be achieved simultaneously.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: May 18, 2004
    Assignee: Bridgestone Corporation
    Inventors: Takumi Inoue, Tomohiro Kusano
  • Publication number: 20030228909
    Abstract: Players input their messages in their video game apparatuses and the messages are once collected at a server apparatus, thereafter they are distributed to all video game apparatuses from the game server apparatus. In a display screen of each video game apparatus, a chat window is displayed in order to display messages exchanged between the players on a game screen including a field and characters of the game. The chat window is sequentially enlarged up to a preset maximum number of lines when a new message is received from the game server apparatus. The chat window is sequentially reduced to the preset minimum number of lines when a predetermined time passes without any reception of new message or when the player performs a specific operation.
    Type: Application
    Filed: March 19, 2003
    Publication date: December 11, 2003
    Applicant: SQUARE Co., Ltd. of Tokyo, Japan
    Inventors: Hiromichi Tanaka, Tomohiro Kusano
  • Patent number: 6602943
    Abstract: In a heavy duty pneumatic tire comprising a tread, the tread is made of a rubber composition comprising 20-67 parts by weight of carbon black and 3-20 parts by weight of silica based on 100 parts by weight of diene based rubber, wherein the carbon black has a ratio of a dibutyl phthalate (DBP) absorption to a 24M4 DBP absorption (DBP absorption/24M4 DBP absorption) of not less than 1.20 and a ratio of the DBP absorption to a nitrogen adsorption specific area (N2SA) of not less than 0.8.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: August 5, 2003
    Assignee: Bridgestone Corporation
    Inventors: Tomohiro Kusano, Akira Matsuda
  • Publication number: 20020050313
    Abstract: In a pneumatic tire of the present invention, a tread reinforcing rubber layer composed of a rubber having larger tensile modulus of elasticity than that of a rubber composing the tread rubber layer and is less stretchable is provided in a thickness direction central area of a tread rubber layer. Because the tread reinforcing rubber layer diminishes the amount of lateral expansion and the amount of vertical compressive deformation when the tread rubber layer contacts the ground, generation of heat in the tread rubber layer can be suppressed. Therefore, in the present invention, the unique tread structure reliably suppresses heat-generation and the rubber of the tread rubber layer exhibits excellent tire wear resistance. As a result, suppression of heat-generation and high tire resistance can readily be achieved simultaneously.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 2, 2002
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Takumi Inoue, Tomohiro Kusano
  • Patent number: 6380288
    Abstract: A rubber composition prepared by compounding 0.05 to 20 parts by weight of at least one selected from substituted hydrazide compounds represented by the following Formulas (I) to (IV) per 100 parts by weight of a rubber component comprising at least one rubber selected from the group consisting of natural rubber and synthetic rubber, and a pneumatic tire using the same: wherein A represents one selected from the group consisting of an aromatic group which may have a substituent, a hydantoin ring which may have a substituent, and a saturated or unsaturated linear hydrocarbon having 1 to 18 carbon atoms; Y represents hydrogen, an amino group, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an alkenyl group, an aromatic group, a pyridyl group or hydrazino group; and R1 to R11 each represent hydrogen, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group or an aromatic group.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: April 30, 2002
    Assignees: Bridgestone Corporation, Otsuka Chemical Co., Ltd.
    Inventors: Masahiro Hojo, Tomohiro Kusano, Akihiko Matsue, Kenichi Sugimoto, Shigeki Kamo, Yoshihisa Tomotaki, Akinori Oka, Ken Hirayama
  • Publication number: 20010053811
    Abstract: In a heavy duty pneumatic tire comprising a tread, the tread is made of a rubber composition comprising 20-67 parts by weight of carbon black and 3-20 parts by weight of silica based on 100 parts by weight of diene based rubber, wherein the carbon black has a ratio of a dibutyl phthalate (DBP) absorption to a 24M4 DBP absorption (DBP absorption/24M4 DBP absorption) of not less than 1.20 and a ratio of the DBP absorption to a nitrogen adsorption specific area (N2SA) of not less than 0.8.
    Type: Application
    Filed: February 12, 1999
    Publication date: December 20, 2001
    Applicant: BRIDGESTONE CORPORATION
    Inventors: TOMOHIRO KUSANO, AKIRA MATSUDA
  • Patent number: 6211281
    Abstract: There is disclosed a pneumatic tire for heavy duty use having a tread which is composed of a rubber composition comprising 100 parts by weight of an (A) isoprene-based rubber and 30 to 70 parts by weight of (B) carbon black which has a nitrogen-adsorption specific surface area (BET) of 120 to 160 m2/g; a dibutyl phthalate absorption amount (DBP) of 80 to 130 ml/100 g; a most frequent value of aggregate diameter distribution (Dst) of 60 to 70 nm; and a half peak width (&Dgr;D50) of 65 to 80 nm, and as the case may be, 3 to 20 parts by weight of (C) silica which has a nitrogen-adsorption specific surface area (BET) of 210 to 260 m2/g; and an oil absorption amount of 200 to 260 ml/100 g. The above pneumatic tire is capable of enhancing the low heat-buildup property without detriment to the abrasion resistance of a tread rubber, and favorably reconciling both the low heat-buildup property and the abrasion resistance of itself.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: April 3, 2001
    Assignee: Bridgestone Corporation
    Inventor: Tomohiro Kusano
  • Patent number: 5856393
    Abstract: A pneumatic tire for heavy loads having a rubber composition for a tread rubber for a construction vehicle or the like, containing carbon black having a nitrogen adsorption specific surface area of 100 to 160 m.sup.2 /g, and an oil (dibutyl phthalate) absorption amount (DBP) of 80 to 130 ml/100 g, and silica having a nitrogen adsorption specific surface area of 210 to 260 m.sup.2 /g, and an oil absorption amount of 200 to 260 ml/100 g, by a total content of 40 to 70 parts by weight, in 100 parts by weight of isoprene rubber material, wherein the rubber composition contains 3 to 15 parts by weight of the total content. Further, the rubber composition contains 30 to 50 parts by weight of carbon black having a nitrogen adsorption specific surface area of 130 to 180 m.sup.2 /g, and an oil (dibutyl phthalate) absorption amount (DBP) of 80 to 120 ml/100 g, and 5 to 15 parts by weight of silica having a nitrogen adsorption specific surface area of 170 m.sup.2 /g or more, and 2.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: January 5, 1999
    Assignee: Bridgestone Corporation
    Inventors: Akihiko Matsue, Tomohiro Kusano
  • Patent number: 5516833
    Abstract: A rubber composition contains 100 parts by weight of natural rubber and/or a diene type synthetic rubber and 20-70 parts by weight of carbon black having the following characteristics:(1) N.sub.2 SA: 70.about.145 m.sup.2 /gr;(2) DBP: 160.about.200 ml/100gr;(3) 24M4DBP: 130.about.150 ml/100gr;(4) DBP-24M4DBP=.DELTA.DBP.ltoreq.1.25.times.DBP-172.5;(5) N.sub.2 SA/IA: 1.1.about.1.4; and(6) .DELTA.D.sub.50 /dst: 0.50.about.0.80.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: May 14, 1996
    Assignee: Bridgestone Corporation
    Inventors: Masayuki Ohashi, Hiroshi Yamada, Tomohiro Kusano
  • Patent number: 5430088
    Abstract: A rubber composition including 100 parts by weight of natural rubber and/or diene synthetic rubber and 30-100 parts by weight of carbon black having the following characteristics:(1) 24M4DBP of 0.95-1.30 ml/g;(2) D.sub.st of 50-80 nm;(3) .DELTA.D.sub.50 /D.sub.st of 0.55-0.75;(4) .DELTA.D.sub.10 /D.sub.st of 1.0-1.5;(5) a component ratio of 20% or less; and(6) CTAB of 120-180 m.sup.2 /g.The rubber composition is excellent in abrasion resistance without compromising low heat generation property and processability thereof.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: July 4, 1995
    Assignee: Bridgestone Corporation
    Inventors: Masayuki Ohashi, Tomohiro Kusano