Patents by Inventor Noritoshi Takamura

Noritoshi Takamura 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: 11028893
    Abstract: An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: June 8, 2021
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Kazama, Noritoshi Takamura, Shigeki Ishikawa, Takeshi Suzuki
  • Patent number: 10995811
    Abstract: The present invention provides a coil spring, in which a corresponding portion is provided at an end portion in a direction of a coil axis, the corresponding portion having a whole size in the direction of the coil axis of the plurality of wire materials adjacent to each other in the direction of the coil axis equal to a maximum value of a gap in the direction of the coil axis between wire materials adjacent to each other in the direction of the coil axis of the coil spring, a gap in the direction of the coil axis between the corresponding portion and a wire material adjacent to the corresponding portion on an inner side in the direction of the coil axis is smaller than a wire height in an active coil portion of the coil spring, and at the end portion of the direction of the coil axis, a gap in the direction of the coil axis between a portion extending around the coil axis from the corresponding portion to a distal end portion side of the wire material and a wire material adjacent to the portion on the inner
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 4, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Toshinori Watanabe, Hidemasa Ito, Noritoshi Takamura, Fumio Yamamoto, Fumio Takahashi
  • Publication number: 20200173510
    Abstract: An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Inventors: Toshio Kazama, Noritoshi Takamura, Shigeki Ishikawa, Takeshi Suzuki
  • Patent number: 10591011
    Abstract: An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: March 17, 2020
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Kazama, Noritoshi Takamura, Shigeki Ishikawa, Takeshi Suzuki
  • Publication number: 20190113094
    Abstract: The present invention provides a coil spring, in which a corresponding portion is provided at an end portion in a direction of a coil axis, the corresponding portion having a whole size in the direction of the coil axis of the plurality of wire materials adjacent to each other in the direction of the coil axis equal to a maximum value of a gap in the direction of the coil axis between wire materials adjacent to each other in the direction of the coil axis of the coil spring, a gap in the direction of the coil axis between the corresponding portion and a wire material adjacent to the corresponding portion on an inner side in the direction of the coil axis is smaller than a wire height in an active coil portion of the coil spring, and at the end portion of the direction of the coil axis, a gap in the direction of the coil axis between a portion extending around the coil axis from the corresponding portion to a distal end portion side of the wire material and a wire material adjacent to the portion on the inner
    Type: Application
    Filed: March 30, 2017
    Publication date: April 18, 2019
    Inventors: Toshinori WATANABE, Hidemasa ITO, Noritoshi TAKAMURA, Fumio YAMAMOTO, Fumio TAKAHASHI
  • Patent number: 10118208
    Abstract: There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 ?m or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: November 6, 2018
    Assignees: SHINKO METAL PRODUCTS CO., LTD., NHK SPRING CO., LTD.
    Inventors: Kotaro Toyotake, Koji Iwaya, Tomoyuki Minami, Noritoshi Takamura
  • Publication number: 20180180126
    Abstract: An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
    Type: Application
    Filed: June 28, 2016
    Publication date: June 28, 2018
    Inventors: Toshio Kazama, Noritoshi Takamura, Shigeki Ishikawa, Takeshi Suzuki
  • Patent number: 9804198
    Abstract: An alloy material includes: a composition containing 17 at % to 25 at % of silver (Ag), 30 at % to 45 at % of palladium (Pd), and 30 at % to 53 at % of copper (Cu) in a composition range of a ternary alloy of Ag, Pd, and Cu; and at least one of manganese (Mn), tin (Sn), silicon (Si), antimony (Sb), titanium (Ti) and magnesium (Mg) added to the composition in a range of 4.5 at % or less, and the Mn in a range of 0.5 at % to 3.5 at %, the Sn in a range of 1 at % to 2 at %, the Si in a range of 0.5 at % to 2 at %, the Sb in a range of 0.5 at % to 3 at %, the Ti in a range of 0.5 at % to 2 at %, and the Mg in a range of 0.5 at % to 3.5 at % are added to the composition.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: October 31, 2017
    Assignees: Yamamoto Precious Metal Co., Ltd., Shinko Metal Products Co., Ltd., NHK Spring Co., Ltd.
    Inventors: Teruo Anraku, Masayuki Ainoya, Tomohiro Kubota, Kotaro Toyotake, Tomoyuki Minami, Noritoshi Takamura, Humio Takahashi
  • Patent number: 9593731
    Abstract: An inexpensive ring spring having high strength and a method for producing the same, are provided. The ring spring can be obtained, for example, by raw material preparation, bending formation, welding, and disk formation performed in this order. The ring spring is formed to have no edge by welding two edge parts of the raw material, and has a welded metal part that is formed at the interface of the two edge parts of the raw material, and a welded heat-affected zone that is formed around the welded metal part and heated by welding, and exhibits tensile strength of 1000 MPa or more. Since the ring spring has sufficient tensile strength as a disk spring and a wave spring, quenching and tempering are not necessary. Furthermore, since the product can be prevented from being deformed due to quenching and tempering, dimensional accuracy of the product can be improved.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: March 14, 2017
    Assignee: NHK SPRING CO., LTD.
    Inventors: Noritoshi Takamura, Fumio Takahashi
  • Publication number: 20170001226
    Abstract: There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 ?m or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
    Type: Application
    Filed: September 16, 2016
    Publication date: January 5, 2017
    Inventors: Kotaro TOYOTAKE, Koji IWATA, Tomoyuki MINAMI, Noritoshi TAKAMURA
  • Patent number: 9482302
    Abstract: There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 ?m or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: November 1, 2016
    Assignees: SHINKO METAL PRODUCTS CO., LTD., NHK SPRING CO., LTD.
    Inventors: Kotaro Toyotake, Koji Iwaya, Tomoyuki Minami, Noritoshi Takamura
  • Publication number: 20150168455
    Abstract: An alloy material includes: a composition containing 17 at % to 25 at % of silver (Ag), 30 at % to 45 at % of palladium (Pd), and 30 at % to 53 at % of copper (Cu) in a composition range of a ternary alloy of Ag, Pd, and Cu; and at least one of manganese (Mn), tin (Sn), silicon (Si), antimony (Sb), titanium (Ti) and magnesium (Mg) added to the composition in a range of 4.5 at % or less, and the Mn in a range of 0.5 at % to 3.5 at %, the Sn in a range of 1 at % to 2 at %, the Si in a range of 0.5 at % to 2 at %, the Sb in a range of 0.5 at % to 3 at %, the Ti in a range of 0.5 at % to 2 at %, and the Mg in a range of 0.5 at % to 3.5 at % are added to the composition.
    Type: Application
    Filed: August 2, 2013
    Publication date: June 18, 2015
    Applicants: YAMAMOTO PRECIOUS METAL CO., LTD., NHK SPRING CO., LTD., SHINKO METAL PRODUCTS CO., LTD.
    Inventors: Teruo Anraku, Masayuki Ainoya, Tomohiro Kubota, Kotaro Toyotake, Tomoyuki Minami, Noritoshi Takamura, Humio Takahashi
  • Patent number: 9056355
    Abstract: A cylindrical core portion, at least a part of which is made of a noble metal alloy and which has a diameter larger than a maximum diameter of a shape obtained by lathe machining, and a hollow-cylindrical peripheral portion, which is made of a material different from the material of the core portion, are included. The core portion is arranged in a hollow portion of the peripheral portion with no space. The material applied to the peripheral portion is a free-cutting material selected from a group of, for example, free-cutting brass, free-cutting phosphor bronze, free cutting nickel silver, and free-cutting beryllium copper. The noble metal alloy applied to the core portion is, for example, alloy mainly consisting of silver, palladium, gold, platinum, zinc, copper, iron, and nickel, alloy mainly consisting of palladium, silver, and copper, or alloy mainly consisting of silver, platinum, zinc, gold, and copper.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: June 16, 2015
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Kazama, Noritoshi Takamura, Tomohiro Kawarabayashi
  • Patent number: 9041194
    Abstract: The pressure unit includes a spring member that is formed into a coil form obtained by winding a wire rod and that has a periodically changing pitch angle and a housing member to which end portions of the spring member are attached, and the pressure unit pressurizes a semiconductor stacked unit obtained by alternately stacking a semiconductor element module and a cooling tube that makes contact with the semiconductor element module and cools the semiconductor element module.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: May 26, 2015
    Assignee: NHK Spring Co., Ltd.
    Inventors: Noritoshi Takamura, Michiya Masuda, Ichiro Sasuga, Nobuharu Kato, Kengo Tsurugai
  • Publication number: 20140367902
    Abstract: An inexpensive ring spring having high strength and a method for producing the same, are provided. The ring spring can be obtained, for example, by raw material preparation, bending formation, welding, and disk formation performed in this order. The ring spring is formed to have no edge by welding two edge parts of the raw material, and has a welded metal part that is formed at the interface of the two edge parts of the raw material, and a welded heat-affected zone that is formed around the welded metal part and heated by welding, and exhibits tensile strength of 1000 MPa or more. Since the ring spring has sufficient tensile strength as a disk spring and a wave spring, quenching and tempering are not necessary. Furthermore, since the product can be prevented from being deformed due to quenching and tempering, dimensional accuracy of the product can be improved.
    Type: Application
    Filed: January 30, 2013
    Publication date: December 18, 2014
    Inventors: Noritoshi Takamura, Fumio Takahashi
  • Publication number: 20140346721
    Abstract: There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 nm or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Kotaro TOYOTAKE, Koji IWAYA, Tomoyuki MINAMI, Noritoshi TAKAMURA
  • Patent number: 8814586
    Abstract: A connector that includes a male terminal which has a conductive property and a tip portion of which is formed in a bar shape, and includes a coil spring formed of a conductive wire rod with an inner diameter smaller than a diameter of the tip portion of the male terminal and that linearly extends at an end portion at which the male terminal is inserted. The male terminal is inserted into the coil spring while a force that expands an inner diameter of at least a vicinity of the end portion is applied to an extending portion, and thereafter fitted to the coil spring by releasing the force.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: August 26, 2014
    Assignee: NHK Spring Co., Ltd.
    Inventors: Shigeki Ishikawa, Noritoshi Takamura, Makoto Saito, Michiya Masuda
  • Publication number: 20140001630
    Abstract: The pressure unit includes a spring member that is formed into a coil form obtained by winding a wire rod and that has a periodically changing pitch angle and a housing member to which end portions of the spring member are attached, and the pressure unit pressurizes a semiconductor stacked unit obtained by alternately stacking a semiconductor element module and a cooling tube that makes contact with the semiconductor element module and cools the semiconductor element module.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 2, 2014
    Applicant: NHK SPRING CO., LTD.
    Inventors: Noritoshi Takamura, Michiya Masuda, Ichiro Sasuga, Nobuharu Kato, Kengo Tsurugai
  • Publication number: 20130239637
    Abstract: There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 ?m or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 19, 2013
    Applicants: NHK Spring Co., Ltd., Shinko Metal Products Co., Ltd.
    Inventors: Kotaro TOYOTAKE, Koji Iwaya, Tomoyuki Minami, Noritoshi Takamura
  • Publication number: 20130012047
    Abstract: A connector that includes a male terminal which has a conductive property and a tip portion of which is formed in a bar shape, and includes a coil spring formed of a conductive wire rod with an inner diameter smaller than a diameter of the tip portion of the male terminal and that linearly extends at an end portion at which the male terminal is inserted. The male terminal is inserted into the coil spring while a force that expands an inner diameter of at least a vicinity of the end portion is applied to an extending portion, and thereafter fitted to the coil spring by releasing the force.
    Type: Application
    Filed: March 23, 2011
    Publication date: January 10, 2013
    Applicant: NHK SPRING CO., LTD.
    Inventors: Shigeki Ishikawa, Noritoshi Takamura, Makoto Saito, Michiya Masuda