Patents by Inventor Naoki Oyaizu

Naoki Oyaizu 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).

  • Patent number: 9228085
    Abstract: A resin composition for a refrigerant-transporting hose, including: a semi-aromatic polyamide resin (A) as a main component; an aliphatic polyamide resin (B); and an elastomer (C), in which the aliphatic polyamide resin (B) is dispersed in a phase formed of the semi-aromatic polyamide resin (A) and the elastomer (C), which is not crosslinked, is incorporated in the form of particles into the dispersed aliphatic polyamide resin (B). Thus, excellent refrigerant permeation resistance and acid resistance, and at the same time, for example, extrusion processability and flexibility, are obtained.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: January 5, 2016
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Naoki Oyaizu, Kazutaka Katayama, Yukinori Wakazono
  • Publication number: 20150255188
    Abstract: Provided is a shaft made of a fiber-reinforced resin, in which a continuous glass fiber bundle is embedded in parallel with a lengthwise direction of the shaft, the shaft including a matrix resin formed of a resin composition comprising (A) a thermosetting resin as a main component, (B) carbon black, (C) a dispersant having a basic functional group, and (D) a curing agent for the component (A), in which the component (B) is particulate and is distributed along continuous glass fibers constituting the continuous glass fiber bundle. Thus, there can be provided a conductive shaft that is lightweight, has high strength, is excellent in conductivity, and is inexpensive, and a conductive roll for OA equipment using the shaft, and a method of producing the conductive shaft.
    Type: Application
    Filed: May 22, 2015
    Publication date: September 10, 2015
    Applicant: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Naoki Oyaizu, Koji Mizutani, Junichiro Suzuki, Kazutaka Katayama, Motoshige Hibino
  • Publication number: 20140187713
    Abstract: A highly durable vibration-damping material is provided. The inventive vibration-damping material comprises a thermoplastic polyurethane elastomer as a major component, and carbon black, wherein the carbon black is dispersed essentially only in a soft segment of the thermoplastic polyurethane elastomer.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 3, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Naoki Oyaizu, Kazutaka Katayama
  • Patent number: 8747951
    Abstract: A method for manufacturing a hose with a protector layer 2 on the outer periphery of a tubular polyamide resin layer 1 includes steps of: preparing a rubber composition for forming the protector layer by separately preparing a first rubber material containing components (A) to (C) and a second rubber material containing components (a) and (b) but substantially free of a sulfur vulcanization agent and mixing them in a mixer; and forming the protector layer 2 by continuously vulcanizing unvulcanized rubber after continuous extrusion of the rubber composition onto the outer periphery of the previously formed polyamide resin layer 1. (A) Ethylene-propylene rubber (B) Sulfur vulcanization agent (C) Thiuram vulcanization accelerator (mp. 66 to 105° C.) (a) Ethylene-propylene rubber (b) Vulcanization accelerator (mp. 120° C. or higher).
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: June 10, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Naoki Oyaizu, Kazutaka Katayama
  • Patent number: 8739836
    Abstract: A refrigerant-transporting hose includes a tubular inner layer 1 in contact with a fluorine refrigerant, an intermediate layer 2 formed on an outer periphery surface thereof, and at least one rubber layer 3 and 5 formed on a further outer periphery thereof, and the inner layer 1 is made of a inner layer material including maleic anhydride-modified polypropylene as a main component and the intermediate layer 2 is made of a intermediate layer material including polyamide resin as a main component.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: June 3, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Naoki Oyaizu, Kazutaka Katayama, Takehiko Taguchi, Hiroyoshi Mori, Eiichi Daikai, Yukinori Wakazono
  • Patent number: 8685515
    Abstract: A refrigerant-transporting hose having excellent low-refrigerant permeability, acid resistance, and flexibility includes a tubular resin layer for contacting with a refrigerant, in which the resin layer is formed of a resin composition containing (A) an aliphatic polyamide; (B) a semi-aromatic polyamide; and (C) an elastomer, in which a weight mixing ratio “component (A)/component (B)” between the component (A) and the component (B) is 95/5 to 60/40, and the component (A) and the component (B) are in a compatible state.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: April 1, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Naoki Oyaizu, Kazutaka Katayama
  • Publication number: 20120199237
    Abstract: To provide a hose for transporting a refrigerant, a butyl rubber layer 7 is formed on outer periphery of a tubular resin layer 1, which is in contact with a refrigerant, and an ethylene-propylene rubber layer 8 is further formed on the outer periphery thereof. The resin layer 1 is composed of a material that contains, as a main component, a mixture of a polyamide resin and a modified polyolefin elastomer, a skin layer 6 is formed only on an inner peripheral surface of the resin layer, and tensile modulus (A) of the skin layer 6, tensile modulus (B) of the resin layer 1 excluding the skin layer 6, tensile modulus (C) of the butyl rubber layer 7, and tensile modulus (D) of the ethylene-propylene rubber layer 8 satisfy the relationship that is defined by the following formula (?): (A)>(B)>(C)>(D)??(?).
    Type: Application
    Filed: February 29, 2012
    Publication date: August 9, 2012
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Naoki Oyaizu, Kazutaka Katayama, Takehiko Taguchi