Patents by Inventor Osamu Ozawa

Osamu Ozawa 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: 20050051248
    Abstract: A run flat tire wheel assembly having a flat run support formed by a ring-shaped metal shell and rubbery elastic members in a tire rim cavity, said tire wheel assembly improving bondability between the ring-shaped metal shell and rubbery elastic members by making said rubbery elastic member from a rubber composition including 100 parts by weight of a diene-based rubber, 40 to 90 parts by weight of carbon black, 3 to 8 parts by weight of sulfur, 0.1 to 1 part by weight of an organic acid cobalt salt in terms of content of cobalt element, 0.1 to 3 parts by weight of a phenylene-diamine-based antiaging agent, and 1 to 6 parts by weight of a resol-type alkylphenol resin.
    Type: Application
    Filed: October 22, 2004
    Publication date: March 10, 2005
    Inventors: Takeshi Hotaka, Yasuhiro Ishikawa, Osamu Ozawa, Ryotaro Suefuji
  • Publication number: 20040244897
    Abstract: A run-flat tire-wheel assembly having, in an inside cavity of the tire/rim, a run-flat support formed by a ring-shaped metal shell and rubber elastic members or a ring-shaped metal shell and rubber elastic members composed of a rubber composition containing 100 parts by weight of a peroxide cross-linkable rubber and 1 to 30 parts by weight of a peroxide cross-linking agent, wherein the contact surfaces of the ring-shaped metal shell with the rubber elastic members are subjected to an electrolytic polymerization with 6-mono- or di-allylamino-1,3,5-triazine-2,4-dithiol or its mono- or di-salt, whereby the bondability between the ring-shaped metal shell and rubber elastic members is improved.
    Type: Application
    Filed: March 11, 2004
    Publication date: December 9, 2004
    Inventors: Takeshi Hotaka, Yasuhiro Ishikawa, Osamu Ozawa, Ryotaro Suefuji
  • Publication number: 20040231773
    Abstract: A run-flat tire-wheel assembly having, in an inside cavity of the tire/rim, a run-flat support formed by a ring-shaped metal shell and rubber elastic members wherein the contact surfaces of the ring-shaped metal shell and the rubber elastic members are coated with an organic solvent-based adhesive, whereby the bondability between the ring-shaped metal shell and rubber elastic members is improved.
    Type: Application
    Filed: March 12, 2004
    Publication date: November 25, 2004
    Inventors: Takeshi Hotaka, Yasuhiro Ishikawa, Osamu Ozawa, Ryotaro Suefuji
  • Patent number: 6589647
    Abstract: In a thermoplastic elastomer having a matrix phase of a thermoplastic resin and a domain phase of rubber particles at least a part of which is crosslinked, use is made of rubber particles at least a part of which is conductive to provide a conductive thermoplastic elastomer composition having a volume resistivity that can be controlled over a wide range of from a conductive region (104 ((&OHgr;·cm) or less) to an insulting region (1013 (&OHgr;·cm) or more).
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: July 8, 2003
    Assignee: The Yokohama Rubber Company, Ltd.
    Inventors: Osamu Ozawa, Kazuhiro Imada
  • Patent number: 6548585
    Abstract: Rubber compositions for hose production having excellent scorch resistance, extrudability, moisture impermeability, weatherability (ozone resistance), and compression set resistance, as well as a hose produced therefrom, and in particular, a refrigerant hose and its production process are provided. More illustratively, a composition comprising (A) a brominated copolymer of an isomonoolefin and a p-alkylstyrene (PMS) wherein PMS content, bromine (Br) content, and Br/PMS weight ratio are within particular ranges; (B) zinc white; and (C) a brominated alkylphenol resin, and a hose wherein such composition is used for the inner tube and/or the outer cover are provided. Also provided are a composition comprising (A) the brominated copolymer rubber and (D) an inorganic laminar compound; a hose produced by using such composition for the inner tube; and a process for producing a refrigerant hose from such a composition by in-die drawing process.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: April 15, 2003
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Tomoji Saitoh, Hiroaki Shibano
  • Patent number: 6526859
    Abstract: A thermoplastic elastomer composition which, when used for the inner tube and/or outer cover of a hose, can improve the hose flexibility at an ordinary temperature and low temperature, oil resistance, and cold resistance and can reduce the production costs since it does not require a vulcanization step and a hose having said properties using this elastomer composition for its inner tube and/or outer cover and a process and apparatus for the production thereof.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: March 4, 2003
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Yoshihiro Soeda, Katuhiro Tanaka, Takashi Satoh, Yuji Kawamori, Toshio Maruyama
  • Patent number: 6492454
    Abstract: A rubber composition having high adhesiveness to a metal, high modulus, high set resistance and high heat resistance, comprising raw material rubber, 2,4-dimercapto-6-substituted-1,3,5-triazine and a polymer having epoxy groups crosslinkable with the raw material rubber; a process for producing the rubber composition exhibiting adhesion stability, by controlling temperature of mixing step when crosslinking the rubber composition with an organic crosslinking agent; and a hose having excellent heat resistance and sufficient modulus and compression set resistance, wherein an inner tube and/or outer cover comprise the rubber composition and a reinforcing layer comprises brass-plated steel wires.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: December 10, 2002
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Tomoji Saitoh
  • Patent number: 6397912
    Abstract: A pneumatic tire having an air permeation preventive layer comprising a low permeability thermoplastic elastomer composition comprising a thermoplastic elastomer having a thermoplastic resin composition as a continuous phase and a rubber composition as a dispersed phase, in which a barrier resin composition is contained, which low permeability thermoplastic elastomer composition has a phase structure in which the barrier resin composition is dispersed in the form of a flat state in the thermoplastic elastomer, is abundant in flexibility, is superior in gas permeation preventive property, and enables the tire to be reduced in weight.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: June 4, 2002
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Jiro Watanabe, Noriaki Kuroda, Gou Kawaguchi, Tetsuji Kawazura, Hidekazu Takeyama, Yoshihiro Soeda, Kazuo Suga, Yoshiaki Hashimura, Osamu Ozawa
  • Patent number: 6334919
    Abstract: A polymer composition for a tire having an air permeation coefficient of 25×10−12 cc·cm/cm2·sec ·cmHg (at 30° C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25×10−12 cc·cm/cm2·sec·cmHg (at 30° C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25×10−12 cc·cm/cm2·sec·cmHg (at 30° C.) and a Young's modulus of not more than 500 MPa, wherein the total amount (A)+(B) of the component (A) and the component (B) is not less than 30% by weight based on the weight of the total polymer component, and a pneumatic tire obtained therefrom.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: January 1, 2002
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Hidekazu Takeyama, Yoshihiro Soeda, Gou Kawaguchi, Tetsuji Kawazura, Osamu Ozawa, Giro Watanabe, Noriaki Kuroda, Masahiro Ikawa
  • Patent number: 6268417
    Abstract: A rubber composition is provided, which comprises: (1) 100 parts by mass of a hydrogenated acrylonitrile-butadiene copolymer rubber having high rate of hydrogenation; (2) 1 to 10 parts by mass of an organic peroxide; (3) 0.1 to 15 parts by mass of 2,4-dimercapto-6-substituted-1,3,5-triazine; and (4) 1 to 100 parts by mass of an organic peroxide-crosslinkable polymer having an epoxy group. The rubber composition has high adhesiveness to a metal, high modulus, high set resistance and high heat resistance, thereby being capable of suitably utilizing for composites of rubber and metal, such as belts, tires, rolls, and molded goods, particularly, for composite rubber products of the rubber composition and a brass or bronze-plated steel plate.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 31, 2001
    Assignees: The Yokohama Rubber Co., Ltd., Nippon Zeon Co., Ltd.
    Inventors: Osamu Ozawa, Tomoji Saitoh, Motofumi Oyama, Manabu Asai
  • Patent number: 6244317
    Abstract: A pneumatic tire having an air permeation preventive layer comprising (A) a thin film of at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups, (B) a thin film obtained from the curing a liquid composition containing (i) a multi component copolymer polyamide resin, (ii) a curable resin, and (iii) a curing agent for curing the curable resin, (C) a thin film obtained by coating and cross-linking a polymer composition containing (i) at least-one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups and/or groups having curable unsaturated bonds and (ii) at least one cross-linking agent and/or curable resin other than an acid, or (D) a thin film of a vinylidene chloride-acrylonitrile copolymer obtained by copolymerizing 5 to 50 molar % of acrylonitrile.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: June 12, 2001
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Kazuto Yamakawa, Osamu Ozawa, Kazuo Suga, Hidekazu Takeyama
  • Patent number: 6179008
    Abstract: A thermoplastic elastomer composition which, when used for the inner tube and/or outer cover of a hose, can improve the hose flexibility at an ordinary temperature and low temperature, oil resistance, and cold resistance and can reduce the production costs since it does not require a vulcanization step and a hose having said properties using this elastomer composition for its inner tube and/or outer cover and a process and apparatus for the production thereof.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: January 30, 2001
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tetsuji Kawazura, Osamu Ozawa, Yoshihiro Soeda, Katuhiro Tanaka, Takashi Satoh, Shigeru Yamauchi, Noriaki Kuroda, Shuji Takahashi, Daisuke Irii, Kazunori Ishikawa, Susumu Hatanaka
  • Patent number: 6179941
    Abstract: A pneumatic tire having an air permeation preventive layer comprising (A) a thin film of at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups, (B) a thin film obtained from the curing a liquid composition containing (i) a multi component copolymer polyamide resin, (ii) a curable resin, and (iii) a curing agent for curing the curable resin, (C) a thin film obtained by coating and cross-linking a polymer composition containing (i) at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups and/or groups having curable unsaturated bonds and (ii) at least one cross-linking agent and/or curable resin other than an acid, or (D) a thin film of a vinylidene chloride-acrylonitrile copolymer obtained by copolymerizing 5 to 50 molar % of acrylonitrile.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: January 30, 2001
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Kazuto Yamakawa, Osamu Ozawa, Kazuo Suga, Hidekazu Takeyama
  • Patent number: 6079465
    Abstract: A polymer composition for a tire having an air permeation coefficient of 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: June 27, 2000
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Hidekazu Takeyama, Yoshihiro Soeda, Gou Kawaguchi, Tetsuji Kawazura, Osamu Ozawa, Giro Watanabe, Noriaki Kuroda, Masahiro Ikawa
  • Patent number: 6062283
    Abstract: A pneumatic tire having an air permeation preventive layer comprising a low permeability thermoplastic elastomer composition comprising a thermoplastic elastomer having a thermoplastic resin composition as a continuous phase and a rubber composition as a dispersed phase, in which a barrier resin composition is contained, which low permeability thermoplastic elastomer composition has a phase structure in which the barrier resin composition is dispersed in the form of a flat state in the thermoplastic elastomer, is abundant in flexibility, is superior in gas permeation preventive property, and enables the tire to be reduced in weight.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: May 16, 2000
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Jiro Watanabe, Noriaki Kuroda, Gou Kawaguchi, Tetsuji Kawazura, Hidekazu Takeyama, Yoshihiro Soeda, Kazuo Suga, Yoshiaki Hashimura, Osamu Ozawa
  • Patent number: 6024816
    Abstract: A pneumatic tire having an air permeation preventive layer comprising (A) a thin film of at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups, (B) a thin film obtained from the curing a liquid composition containing (i) a multi component copolymer polyamide resin, (ii) a curable resin, and (iii) a curing agent for curing the curable resin, (C) a thin film obtained by coating and cross-linking a polymer composition containing (i) at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups and/or groups having curable unsaturated bonds and (ii) at least one cross-linking agent and/or curable resin other than an acid, or (D) a thin film of a vinylidene chloride-acrylonitrile copolymer obtained by copolymerizing 5 to 50 molar % of acrylonitrile.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: February 15, 2000
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Kazuto Yamakawa, Osamu Ozawa, Kazuo Suga, Hidekazu Takeyama
  • Patent number: 5919864
    Abstract: A thermoplastic elastomer composition containing a thermoplastic resin component including 10 to 95% by weight of a polypropylene having a syndiotactic structure and an elastomer component and having a value of .alpha., defined as follows, of 1 or less:.alpha.=(.phi.d/.phi.m).times.(.eta.m/.eta.d)wherein the volume fraction of the thermoplastic resin component is .phi.m, the melt viscosity thereof at the mixing conditions is .eta.m and the volume fraction of the elastomer component is .phi.d, the melt viscosity thereof is .eta.d.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: July 6, 1999
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Jiro Watanabe, Osamu Ozawa, Noriaki Kuroda, Gou Kawaguchi
  • Patent number: 5910544
    Abstract: A thermoplastic elastomer composition comprising:i) from 15 to 80 parts by weight of a polyamide thermoplastic resin as component A;ii) from 20 to 85 parts by weight of a rubber composition as component B, the rubber composition containing a copolymer rubber composed of a copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a p-alkylstyrene, where at least a part of the p-alkylstyrene unit portions thereof have a halogen atom; andiii) a cross-linking agent,wherein the thermoplastic resin component A forms a continuous phase and at least part of component B is dispersed in component A as a dispersed phase and at least part of the dispersed phase is cross-linked by the cross-linking agent.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: June 8, 1999
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Tetsuji Kawazura, Noriaki Kuroda, Yoshihiro Aoyagi, Jiro Watanabe, Gou Kawaguchi
  • Patent number: 5804269
    Abstract: A hose useful for handling low temperature fluids such as refrigerants is disclosed, which exhibits excellent resistance to ozone and moisture permeation. A cover or outermost tube of the hose is formed from a vulcanizate of a rubber composition comprising a first copolymer rubber having an isobutylene unit and a p-halogenated methylstyrene unit and/or a second copolymer rubber having an isobutylene unit, a p-halogenated methylstyrene unit and a p-methylstyrene unit.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: September 8, 1998
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Tetsu Kitami
  • Patent number: 5738158
    Abstract: A pneumatic tire having an air permeation prevention layer composed of a thin film of a resin composition including at least 20% by weight of a thermoplastic polyester elastomer comprised of a block copolymer of polybutylene terephthalate and polyoxyalkylene diimide diacid at a weight ratio of polybutylene terephthalate/polyoxyalkylene diimide diacid of 85/15 or less.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: April 14, 1998
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Osamu Ozawa, Noriaki Kuroda, Jiro Watanabe, Masahiro Ikawa, Tetsuji Kawazura