Patents by Inventor Hiromu Izumida

Hiromu Izumida 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: 20200080166
    Abstract: A canted coil spring includes a core wire 10 formed of steel having a pearlite structure; and a copper plating layer 20 formed of copper or a copper alloy and covering an outer circumferential surface 11 of the core wire 10. The steel contains 0.5 mass % or more and 1.0 mass % or less carbon, 0.1 mass % or more and 2.5 mass % or less silicon, and 0.3 mass % or more and 0.9 mass % or less manganese, with the balance being iron and inevitable impurities. The copper plating layer 20 has a crystallite size of 220±50 ?.
    Type: Application
    Filed: March 13, 2018
    Publication date: March 12, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takumi AKADA, Hiromu IZUMIDA
  • Publication number: 20200056671
    Abstract: A wire material for a canted coil spring includes a core wire composed of a steel having a pearlite structure, a copper plating layer covering the outer peripheral surface of the core wire, the copper plating layer being composed of copper or a copper alloy, and a hard layer disposed adjacent to the outer periphery of the copper plating layer, the hard layer having a higher hardness than the copper plating layer. The steel constituting the core wire contains 0.5% or more by mass and 1.0% or less by mass carbon, 0.1% or more by mass and 2.5% or less by mass silicon, and 0.3% or more by mass and 0.9% or less by mass manganese, the balance being iron and unavoidable impurities.
    Type: Application
    Filed: December 4, 2017
    Publication date: February 20, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takumi AKADA, Hiromu IZUMIDA, Akihisa HOSOE
  • Patent number: 10475552
    Abstract: A strand for a wiring harness includes a first element wire and a second element wire twisted around the first element wire and made of copper or a copper alloy. The first element wire includes a core portion made of stainless steel and a covering layer covering the core portion and made of copper or a copper alloy.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: November 12, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Akihisa Hosoe, Takumi Akada, Shinei Takamura, Katsutoshi Iwamoto
  • Publication number: 20190272931
    Abstract: A strand for a wiring harness includes a first element wire and a second element wire twisted around the first element wire and made of copper or a copper alloy. The first element wire includes a core portion made of stainless steel and a covering layer covering the core portion and made of copper or a copper alloy.
    Type: Application
    Filed: July 5, 2017
    Publication date: September 5, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiromu IZUMIDA, Akihisa HOSOE, Takumi AKADA, Shinei TAKAMURA, Katsutoshi IWAMOTO
  • Publication number: 20190154096
    Abstract: A wire material for a canted coil spring 1 includes a core wire 10 made of steel with a pearlite structure and a plating layer 20 covering a surface 11 of the core wire 10 and made of copper or a copper alloy. The steel constituting the core wire 10 contains 0.5% to 1.0% by mass of carbon, 0.1% to 2.5% by mass of silicon, and 0.3% to 0.9% by mass of manganese, with the balance being iron and unavoidable impurities.
    Type: Application
    Filed: April 10, 2017
    Publication date: May 23, 2019
    Inventor: Hiromu IZUMIDA
  • Publication number: 20190074621
    Abstract: Provided is a connector terminal wire rod including: a base material containing a metallic material; a first metallic layer formed to be exposed on the base material, the first metallic layer containing Sn; and a second metallic layer formed to be exposed on the base material, the second metallic layer containing Sn and Pd and being different from the first metallic layer in composition.
    Type: Application
    Filed: December 21, 2016
    Publication date: March 7, 2019
    Inventors: Mikio Sato, Hiromu Izumida
  • Patent number: 9849531
    Abstract: An object of the present invention is to improve machining speed by realizing both conductive properties and discharge performance with regard to an electrode wire for wire electric discharge machining, the electrode wire being obtained by plating a steel wire with a copper-zinc alloy. Another object is to suppress the occurrence of separation, cracking, and the like of plating in a wire-drawing step of an electrode wire. An electrode wire for wire electric discharge machining of the present invention includes a steel wire (11) serving as a core wire, and a plating layer (12) that covers the steel wire and that is composed of a copper-zinc alloy, in which an average zinc concentration of the plating layer is 60% to 75% by mass, a conductivity of the plating layer is 10% to 20% IACS, and a wire diameter is 30 to 200 ?m.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: December 26, 2017
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo (SEI) Steel Wire Corp.
    Inventors: Kazuaki Sugimura, Hiromu Izumida, Kenichi Shimizu, Shinei Takamura, Katsutoshi Iwamoto
  • Publication number: 20150360309
    Abstract: An object of the present invention is to improve machining speed by realizing both conductive properties and discharge performance with regard to an electrode wire for wire electric discharge machining, the electrode wire being obtained by plating a steel wire with a copper-zinc alloy. Another object is to suppress the occurrence of separation, cracking, and the like of plating in a wire-drawing step of an electrode wire. An electrode wire for wire electric discharge machining of the present invention includes a steel wire (11) serving as a core wire, and a plating layer (12) that covers the steel wire and that is composed of a copper-zinc alloy, in which an average zinc concentration of the plating layer is 60% to 75% by mass, a conductivity of the plating layer is 10% to 20% IACS, and a wire diameter is 30 to 200 ?m.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 17, 2015
    Applicants: Sumitomo Electric Industries, Ltd., Sumitomo (SEI) Steel Wire Corp.
    Inventors: Kazuaki SUGIMURA, Hiromu IZUMIDA, Kenichi SHIMIZU, Shinei TAKAMURA, Katsutoshi IWAMOTO
  • Publication number: 20150004052
    Abstract: A copper alloy having high strength and a high electrical conductivity in combination and a copper alloy wire are provided. A copper alloy contains 50 percent by mass or more and 95 percent by mass or less of Cu, 5 percent by mass or more and 50 percent by mass or less of Fe, and the remainder composed of deoxidizer elements and incidental impurities and has a texture exhibiting large diffraction peaks in the <111> orientation of Cu and in the <110> orientation of Fe when a cross-section is subjected to X-ray diffraction. The intensity ratio ICu( 111) of the diffraction peak in the <111> orientation of Cu to the intensity of the whole diffraction lines of Cu is 0.70 or more and 1.0 or less and the intensity ratio IFe(110) of the diffraction peak in the <110> orientation of Fe to the intensity of the whole diffraction lines of Fe is 0.90 or more and 1.0 or less.
    Type: Application
    Filed: December 28, 2012
    Publication date: January 1, 2015
    Inventors: Hiromu Izumida, Kenichi Shimizu, Shinei Takamura
  • Patent number: 7717411
    Abstract: Provided is a high-strength stainless steel spring exhibiting a good workability and having a high load characteristic. Thus, the high-strength stainless steel spring of the invention has an chemical component containing 0.04 to 0.08% by mass of C, 0.15 to 0.22% by mass of N, 0.3 to 2.0% by mass of Si, 0.5 to 3.0% by mass of Mn, 16 to 20% by mass of Cr, 8.0 to 10.5% by mass of Ni, 0.5 to 3.0% by mass of Mo, and the balance of Fe and inevitable impurities, and when the average diameter of the coil is represented by D and further the diameter of the steel wire is represented by d in the case that cross sections of the stainless steel wire are in a complete round form or the value obtained by subtracting the average coil diameter from the outer diameter of the coil is represented by d? in the case that the cross sections of the stainless steel wire are in a form other than the complete round form, the spring has a spring index D/d or D/d? of 2 to 6.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: May 18, 2010
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo (SEI) Steel Wire Corp., NHK Spring Co., Ltd.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Shinei Takamura, Teruyuki Murai, Noritoshi Takamura
  • Publication number: 20090174129
    Abstract: Provided is a high-strength stainless steel spring exhibiting a good workability and having a high load characteristic. Thus, the high-strength stainless steel spring of the invention has an chemical component containing 0.04 to 0.08% by mass of C, 0.15 to 0.22% by mass of N, 0.3 to 2.0% by mass of Si, 0.5 to 3.0% by mass of Mn, 16 to 20% by mass of Cr, 8.0 to 10.5% by mass of Ni, 0.5 to 3.0% by mass of Mo, and the balance of Fe and inevitable impurities, and when the average diameter of the coil is represented by D and further the diameter of the steel wire is represented by d in the case that cross sections of the stainless steel wire are in a complete round form or the value obtained by subtracting the average coil diameter from the outer diameter of the coil is represented by d? in the case that the cross sections of the stainless steel wire are in a form other than the complete round form, the spring has a spring index D/d or D/d? of 2 to 6.
    Type: Application
    Filed: February 16, 2007
    Publication date: July 9, 2009
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO (SEI) STEEL WIRE CORP., NHK SPRING CO., LTD.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Shinei Takamura, Teruyuki Murai, Noritoshi Takamura
  • Patent number: 7491891
    Abstract: A wire-harness use composite wire comprising a first element wire which comprises 0.01-0.25 mass % C, 0.01-0.25 mass % N, 0.5-4.0 mass % Mn, 16-20 mass % Cr,8.0-14.0 mass % Ni, and the balance of Fe and impurities and satisfies that a C+N content is in the range of 0.15 mass %?C+N?0.30 mass %, and a second element wire comprising at least one material selected from the group consisting of copper, copper alloy, aluminum, and aluminum alloy, the first element wire and the second element wire being twisted together.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: February 17, 2009
    Assignees: Sumitomo (SEI) Steel Wire Corp., Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Teruyuki Murai, Shinei Takamura
  • Patent number: 7404865
    Abstract: A high-strength steel wire for heat-resistant springs has both excellent high-temperature tensile strength and excellent high-temperature sag resistance at a temperature as high as 350 to 500° C., particularly at 400° C. or so (these properties are needed for spring materials). The steel wire contains (a) 0.01 to 0.08 wt % C, 0.18 to 0.25 wt % N, 0.5 to 4.0 wt % Mn, 16 to 20 wt % Cr, and 8.0 to 10.5 wt % Ni, (b) at least one constituent selected from the group consisting of 0.1 to 3.0 wt % Mo, 0.1 to 2.0 wt % Nb, 0.1 to 2.0 wt % Ti and 0.3 to 2.0 wt % Si, and (c) mainly Fe and unavoidable impurities both of which constitute the remainder. The steel wire has (a) a tensile strength of at least 1,300 N/mm2 and less than 2,000 N/mm2 before being treated with low-temperature annealing, and (b) a maximum crystal-grain diameter of less than 12 ?m in the ? phase (austenite) in a transverse cross section of the wire.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: July 29, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Teruyuki Murai
  • Publication number: 20070221396
    Abstract: [Object] To provide a wire-harness use composite wire having a further improved corrosion resistance, while having excellent conductivity and strength. [Solving means] A wire-harness use composite wire comprising a first element wire which comprises 0.01-0.25 mass % C, 0.01-0.25 mass % N, 0.5-4.0 mass % Mn, 16-20 mass % Cr, 8.0-14.0 mass % Ni, and the balance of Fe and impurities and satisfies that a C+N content is in the range of 0.15 mass %?C+N?0.30 mass %, and a second element wire comprising at least one material selected from the group consisting of copper, copper alloy, aluminum, and aluminum alloy, the first element wire and the second element wire being twisted together.
    Type: Application
    Filed: May 19, 2004
    Publication date: September 27, 2007
    Inventors: Hiromu Izumida, Nozomu Kawabe, Teruyuki Murai, Shinel Takamura
  • Patent number: 7230186
    Abstract: A lightweight insulated electric wire and an automobile wire harness using the same insulated electric wire where the insulated electric wire has a conductor portion including one or more first wires and one or more second wires, which are stranded together. The first wires are constituted by metal wires made from at least one type of metal selected from copper, copper alloy, aluminum and aluminum alloy. The second wires are constituted by metal wires different from the first wires and have a relative permeability of 4.0 or less.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: June 12, 2007
    Assignees: Sumitomo (SEI) Steel Wire Corp., Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Shinei Takamura, Teruyuki Murai, Takashi Yoshioka, Toshio Shimizu
  • Publication number: 20070082223
    Abstract: There is provided a stainless steel wire having both excellent corrosion resistance and an excellent fatigue strength while being fabricable with high productivity. A stainless steel wire consists of 0.01 to 0.25 mass % C, 0.01 to 0.25 mass % N, 0.4 to 4.0 mass % Mn, 16 to 25 mass % Cr, 8.0 to 14.0% Ni and the balance Fe with impurities, wherein the C+N content satisfies 0.15 mass % ?C+N ?0.35 mass %. The stainless steel wire contains 15 vol. % martensite phase induced by a drawing and the balance austenite phase and has a texture which causes the austenite phase to exhibit diffraction intensities satisfying both I(200)/I(111)?2.0 and I(220)/I(111)?3.0 by X-ray diffraction in the longitudinal direction of the steel wire.
    Type: Application
    Filed: October 28, 2004
    Publication date: April 12, 2007
    Inventors: Hiromu Izumida, Nozomu Kawabe, Yoshiro Fujino, Teruyuki Murai, Shinei Takamura
  • Publication number: 20070017691
    Abstract: There are provided a lightweight insulated electric wire capable of reducing influences of external magnetic fields while having an excellent conductivity and an excellent strength and an automobile wire harness using the same insulated electric wire. There is provided a signal electric wire including a conductor portion consisting of one or more first wires and one or more second wires, which are stranded together. The first wires are constituted by metal wires made from at least one type of metal selected from a group consisting of copper, copper alloy, aluminum and aluminum alloy. The second wires are constituted by metal wires different from the first wires and have a relative permeability of 4.0 or less. By setting the relative permeability of the constituent wires of the conductor portion to 4.0 or less, it is possible to suppress temperature rises caused by eddy current loses due to external magnetic fields, thus alleviating degradation of the insulation layer and poor insulation.
    Type: Application
    Filed: September 1, 2004
    Publication date: January 25, 2007
    Inventors: Hiromu Izumida, Nozomu Kawabe, Shinei Takamura, Teruyuki Murai, Takashi Yoshioka, Toshio Shimizu
  • Publication number: 20040099354
    Abstract: A high-strength steel wire for heat-resistant springs has both excellent high-temperature tensile strength and excellent high-temperature sag resistance at a temperature as high as 350 to 500° C., particularly at 400° C. or so (these properties are needed for spring materials). The steel wire contains (a) 0.01 to 0.08 wt % C, 0.18 to 0.25 wt % N, 0.5 to 4.0 wt % Mn, 16 to 20 wt % Cr, and 8.0 to 10.5 wt % Ni, (b) at least one constituent selected from the group consisting of 0.1 to 3.0 wt % Mo, 0.1 to 2.0 wt % Nb, 0.1 to 2.0 wt % Ti and 0.3 to 2.0 wt % Si, and (c) mainly Fe and unavoidable impurities both of which constitute the remainder. The steel wire has (a) a tensile strength of at least 1,300 N/mm2 and less than 2,000 N/mm2 before being treated with low-temperature annealing, and (b) a maximum crystal-grain diameter of less than 12 &mgr;m in the &ggr; phase (austenite) in a transverse cross section of the wire.
    Type: Application
    Filed: September 30, 2003
    Publication date: May 27, 2004
    Inventors: Hiromu Izumida, Nozomu Kawabe, Teruyuki Murai
  • Patent number: 6478897
    Abstract: An Ni-based or Ni—Co-based heat-resistant alloy wire excellent in resistance to sag at high temperatures ranging from 600 to 700° C., which excellent resistance is most suitable for spring materials. The heat-resistant alloy wire contains (a) 0.01 to 0.40 wt % C, 5.0 to 25.0 wt % Cr, and 0.2 to 8.0 wt % Al; (b) at least one constituent selected from the group consisting of 1.0 to 18.0 wt % Mo, 0.5 to 15.0 wt % W, 0.5 to 5.0 wt % Nb, 1,0 to 10.0 wt % Ta, 0.1 to 5.0 wt % Ti and 0.001 to 0.05 wt % B; (c) at least one constituent selected from the group consisting of 3.0 to 20.0 wt % Fe and 1.0 to 30.0 wt % Co; and (d) the remaining constituent consisting mainly of Ni and unavoidable impurities. The wire has (a) a tensile strength not less than 1,400 N/mm2 and less than 1,800 N/mm2, (b) an average crystal-grain diameter not less than 5 &mgr;m and less than 50 &mgr;m in a cross section, and (c) a crystal-grain aspect ratio (a major-axis/minor-axis ratio) of 1.2 to 10 in a longitudinal section.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: November 12, 2002
    Assignee: Sumitomo Electric Engineering, Ltd.
    Inventors: Hiromu Izumida, Nozomu Kawabe, Sadamu Matsumoto, Norihito Yamao, Teruyuki Murai
  • Patent number: 5647313
    Abstract: A combination of an adjusting shim and a cam used in a valve train in an internal combustion engine for automobiles, the adjusting shim composed of a ceramic material which sets the surface roughness of a sliding surface of the adjusting shim with respect to a cam to not more than 0.1 .mu.m in ten-point mean roughness Rz, and which contains not less than 60 vol. % of silicon nitride or sialon, and the cam composed of cast iron a surface of which is chill hardened and then provided with a phosphate film thereon. The combination of an adjusting shim and a cam is capable of smoothing a sliding surface of the cam by the break-in of the part even if the cam is not subjected to a super-precision finishing process; preventing the seizure and abnormal abrasion of sliding surfaces; stabilizing a smoothed condition of the sliding surfaces of the cam and shim for a long period of time; and providing excellent sliding characteristics of the sliding surfaces owing to a decrease in the friction coefficient thereof.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: July 15, 1997
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Kaoru Murabe, Takao Nishioka, Akira Yamakawa, Kenji Matsunuma