Patents by Inventor Hirohiko Nakabayashi

Hirohiko Nakabayashi 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).

  • Magnet wire and electromagnetic relay using the same
    Patent number: 5347249
    Abstract: A polyurethane magnet wire comprising a conductor having provided thereon a polyurethane insulation coating, wherein the total amount of the phenolic compounds contained in organic compounds which evaporate from said coating by heating at 280.degree. C. for 2 minutes is 0.2 wt% or less based on the weight of the coating and the total amount of the organic compounds is 2 wt% or less based on the weight of the coating; and an electric relay comprising such a wire.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: September 13, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Akihisa Takeuchi, Waichiro Kozen, Hirohiko Nakabayashi
  • Magnet wire and electromagnetic relay using the same
    Patent number: 5254408
    Abstract: A polyurethane magnet wire comprising a conductor having provided thereon a polyurethane insulation coating, wherein the total amount of the phenolic compounds contained in organic compounds which evaporate from said coating by heating at 280.degree. C. for 2 minutes is 0.2 wt % or less based on the weight of the coating and the total amount of the organic compounds is 2 wt % or less based on the weight of the coating; and an electric relay comprising such a wire.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: October 19, 1993
    Assignee: Sumito Electric Industrial Co., Ltd.
    Inventors: Akihisa Takeuchi, Waichiro Kozen, Hirohiko Nakabayashi
  • Enameled wires
    Patent number: 4511624
    Abstract: An enameled wire which can be safely used for electric machinery such as an electric motor and transformer without causing smoking or fire accidents comprising a conductive wire coated with a thermoplastic straight chain polyurethane having therein the following repeating unit ##STR1## wherein R and R' each represents a divalent group having at least 2 carbon atoms.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: April 16, 1985
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Munetaka Kawaguchi, Hirohiko Nakabayashi, Masayoshi Miyake
  • Enamelled wire
    Patent number: 4508779
    Abstract: An enamelled wire comprising a layer of baked insulation formed on the conductor either directly or through another insulation can be produced by applying to at least the outermost layer of the wire a wire enamel composition consisting essentially of a polyester resin at least one molecule of which is terminated with a straight alkyl group having 21 or more carbon atoms, and drying the same.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: April 2, 1985
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masayoshi Miyake, Isao Ueoka, Munetaka Kawaguchi, Hirohiko Nakabayashi, Teruyuki Yamamoto
  • Magnet wire
    Patent number: 4378407
    Abstract: A magnet wire comprising a conductor having thereon an outermost insulating wire enamel layer, either directly or over another insulating layer, said wire enamel consisting essentially of a polyamideimide wherein either one or both ends of at least one polyamideimide molecule is a terminal linear alkyl group having at least 21 carbon atoms. The magnet wire has a high resistance to refrigerant as well as to thermal or mechanical damage and has a high lubricity.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: March 29, 1983
    Assignee: Sumitomo Electric Industries Ltd.
    Inventors: Teruyuki Yamamoto, Masayoshi Miyake, Munetaka Kawaguchi, Hirohiko Nakabayashi
  • Insulated wire with a silicone releasing layer
    Patent number: 4000362
    Abstract: An electrical insulation coated metallic wire consisting of a releasing layer coated on a metallic wire and an insulating layer superposed on the releasing layer. The insulating layer is formed by coating and baking an insulating varnish on the releasing layer. The electrical insulation coated metallic wire is used as an insulated conductive wire or an insulated resistance wire, the former using an electric conductor as the metallic wire and the latter using an electric-resistive substance as the metallic wire.
    Type: Grant
    Filed: March 6, 1973
    Date of Patent: December 28, 1976
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Munetaka Kawaguchi, Hirohiko Nakabayashi