Patents by Inventor Takeo Miyamura

Takeo Miyamura 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: 11401593
    Abstract: The invention relates to a maraging steel containing C: 0.02% (mass %, hereinafter the same) or less, Si: 0.3% or less, Mn: 0.3% or less, Ni: 7.0 to 15.0%, Cr: 5.0% or less, Co: 8.0 to 12.0%, Mo: 0.1 to 2.0%, Ti: 1.0 to 3.0%, and Sol.Al: 0.01 to 0.2%, where the balance includes Fe and unavoidable impurities of P: 0.01% or less, S: 0.01% or less, N: 0.01% or less, and O: 0.01% or less. The parent phase of the maraging steel includes a martensitic phase. The parent phase contains a martensitic phase obtained by reverse transformation from a martensitic phase to an austenitic phase and then transformation from the austenitic phase, in an area fraction of 25% to 75%.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: August 2, 2022
    Assignee: Kobe Steel, Ltd.
    Inventors: Zhuyao Chen, Takeo Miyamura, Shigenobu Namba
  • Publication number: 20220134486
    Abstract: Provided is a covered electrode for high-Cr ferritic heat-resistant steels with which it is possible to obtain weld metal that has the toughness required for weld parts and has excellent high temperature strength. The covered electrode for high-Cr ferritic heat-resistant steels includes a steel core and a coating agent that coats the core. The covered electrode comprises C, Si, Mn, Ni, Cr, Mo, V, Co, B, Nb, W, N, and Fe each in a predetermined range in the total mass of the covered electrode, contains a slag forming agent, and has a total of the W content and the Co content of 2.8 mass % or more.
    Type: Application
    Filed: March 23, 2020
    Publication date: May 5, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiromi OYAMADA, Hideaki TAKAUCHI, Yoshimasa MURANISHI, Shigenobu NAMBA, Takeo MIYAMURA
  • Publication number: 20220134489
    Abstract: A welding material may be suitable for high-Cr ferritic heat-resistant steels, and may suppress ?-ferrite occurrence, i.e., a soft structure, thereby improving the toughness, and enabling the achievement of a welded metal that has good cracking resistance and strength at high temperatures. Such welding materials for high-Cr ferritic heat-resistant steels may contain C, Si, Mn, S, Co, V, Nb, W, N, and O, respectively within specific ranges and limits Ni and P respectively to specific ranges, while containing from 8.0% by mass to 9.5% by mass (inclusive) of Cr and from 0.02% by mass to 0.20% by mass (inclusive) of Mo and additionally limiting Cu to less than 0.05% by mass, with the balance being made up of Fe and unavoidable impurities.
    Type: Application
    Filed: February 13, 2020
    Publication date: May 5, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoshimasa MURANISHI, Hiromi OYAMADA, Hideaki TAKAUCHI, Takeo MIYAMURA, Shigenobu NAMBA
  • Patent number: 10694283
    Abstract: Aspects of the invention can include a teleconferencing system having a system housing, a speaker enclosure configured within the system housing, a speaker mounted to the speaker enclosure, and one or more damping cushions coupling the speaker enclosure to the system housing. The one or more damping cushions can suspend the speaker enclosure within the system housing such that the speaker enclosure is separated and mechanically isolated from the system housing by at least a minimum distance (e.g., 2 mm). In some cases, the one or more damping cushions provide the only structural coupling between the speaker enclosure and the system housing. The one or more damping cushions can be configured to dampen mechanical energy generated by the speaker thereby preventing at least a portion of the mechanical energy form coupling to the system housing via the one or more damping cushions.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: June 23, 2020
    Assignee: Logitech Europe S.A.
    Inventors: Kenneth Norman Haastrup, Howard Takeo Miyamura, Beau Calvin Chimene, Alexander Vitalyevich Korolenko, Bill Cheng
  • Publication number: 20200071804
    Abstract: The present invention relates to a maraging steel containing C: 0.02% (means mass %, hereinafter the same) or less, Si: 0.3% or less, Mn: 0.3% or less, Ni: 7.0 to 15.0%, Cr: 5.0% or less, Co: 8.0 to 12.0%, Mo: 0.1 to 2.0%, Ti: 1.0 to 3.0%, and Sol.Al: 0.01 to 0.2%, where the balance includes Fe and unavoidable impurities of P: 0.01% or less, S: 0.01% or less, N: 0.01% or less, and O: 0.01% or less. The parent phase of the maraging steel includes a martensitic phase. The parent phase contains a martensitic phase obtained by reverse transformation from a martensitic phase to an austenitic phase and then transformation from the austenitic phase, in an area fraction of 25% to 75%.
    Type: Application
    Filed: February 5, 2018
    Publication date: March 5, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Zhuyao CHEN, Takeo MIYAMURA, Shigenobu NAMBA
  • Publication number: 20190364357
    Abstract: Aspects of the invention can include a teleconferencing system having a system housing, a speaker enclosure configured within the system housing, a speaker mounted to the speaker enclosure, and one or more damping cushions coupling the speaker enclosure to the system housing. The one or more damping cushions can suspend the speaker enclosure within the system housing such that the speaker enclosure is separated and mechanically isolated from the system housing by at least a minimum distance (e.g., 2 mm). In some cases, the one or more damping cushions provide the only structural coupling between the speaker enclosure and the system housing. The one or more damping cushions can be configured to dampen mechanical energy generated by the speaker thereby preventing at least a portion of the mechanical energy form coupling to the system housing via the one or more damping cushions.
    Type: Application
    Filed: May 23, 2018
    Publication date: November 28, 2019
    Inventors: Kenneth Norman Haastrup, Howard Takeo Miyamura, Beau Calvin Chimene, Alexander Vitalyevich Korolenko, Bill Cheng
  • Publication number: 20170356070
    Abstract: Disclosed is a mar aging steel containing, in combination in mass percent, C in a content from greater than 0% to 0.02%, Mn in a content from greater than 0% to 0.3%, Si in a content from greater than 0% to 0.3%, Ni in a content of 10% to 13%, Mo in a content of 0.5% to 3.5%, Co in a content of 9% to 12%, Cr in a content of 1.5% to 4.5%, Ti in a content of 1.5% to 4.5%, and Al in a content of 0.01% to 0.2%, where the total content of Mo and Ti is 5.0 mass percent or less, and the ratio ([Mo]/[Ti]) of the Mo content [Mo] to the Ti content [Ti] is 1.0 or less, with the remainder consisting of iron and inevitable impurities.
    Type: Application
    Filed: May 19, 2017
    Publication date: December 14, 2017
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo MIYAMURA, Shigenobu NAMBA, Zhuyao CHEN
  • Patent number: 9818519
    Abstract: Provided is soft magnetic powder used to manufacture a dust core having good mechanical strength and superior formability while iron loss is reduced. The soft magnetic powder for dust cores according to the invention is soft magnetic mixed powder that includes pure iron powder and soft magnetic iron-base alloy powder, wherein the proportion of the soft magnetic iron-base alloy powder in the mixture is 5 to 60 mass %, the ratio of the modes of the particle size distributions of the soft magnetic iron-base alloy powder and the pure iron powder ((the mode of the particle size distribution of the soft magnetic iron-base alloy powder)/(the mode of the particle size distribution of the pure iron powder)) is 0.9 or more and less than 5, and the ratio Rover/Runder is 1.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: November 14, 2017
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Hiroyuki Mitani
  • Patent number: 9617627
    Abstract: This heat-resistant austenitic stainless steel has a specific composition containing Ce and Zr and has an Hv1/Hv0 ratio of 1.20 or higher, where Hv1 is the average hardness of the area ranging from the surface to a thickness-direction depth of 50 ?m and Hv0 is the average hardness of the thickness-direction central part.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: April 11, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Takeo Miyamura, Shigenobu Namba
  • Publication number: 20170067139
    Abstract: An austenitic heat-resistant steel containing, by mass, 0.05-0.16% of C, 0.1-1% of Si, 0.1-2.5% of Mn, 0.01-0.05% of P, less than 0.005% of S, 7-12% of Ni, 16-20% of Cr, 2-4% of Cu, 0.1-0.8% of Mo, 0.1-0.6% of Nb, 0.1-0.6% of Ti, 0.0005-0.005% of B, 0.001-0.15% of N, and 0.005% or less of Mg and/or 0.005% or less of Ca, the amounts of Nb and Ti being 0.3% or above in total, with the remainder being made up by Fe and unavoidable impurities. The cumulative number density of a precipitate has a particle diameter of over 0 nm to 100 urn being 0.1-2.0/?m2, the precipitate particle diameter corresponding to half of the cumulative number density in the distribution of the cumulative number density and the precipitate particle diameter is 70 nm or less, the average hardness is 160 Hv or less, and the grain size number is 7.5 or above.
    Type: Application
    Filed: March 4, 2015
    Publication date: March 9, 2017
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo MIYAMURA, Shigenobu NAMBA
  • Patent number: 9589712
    Abstract: Disclosed is an iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization, and thermally reducing the iron-oxide-based soft magnetic powder. The iron-based soft magnetic powder has an average particle size of 100 ?m or more and has an interface density of more than 0 ?m?1 and less than or equal to 2.6×10?2 ?m?1, where the interface density is determined from a cross-sectional area (?m2) and a cross-sectional circumference (?m) of the iron-based soft magnetic powder. The iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization and thermally reducing the iron-oxide-based soft magnetic powder, when used for the production of a dust core, can give a dust core having a low coercive force. Also disclosed is a duct core having a low coercive force and exhibiting superior magnetic properties.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 7, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Takeo Miyamura, Hiroyuki Mitani, Hirofumi Hojo
  • Patent number: 9583261
    Abstract: A powder magnetic core which exhibits a high compact density and a reduced iron loss can be obtained by compacting a soft magnetic powder in which the mass ratio of soft magnetic powder particles that pass through a filter having an opening of 75 ?m is 95 mass % or higher relative to the whole amount of the soft magnetic powder and which has a mean strain of less than 0.100%.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: February 28, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Hiroyuki Mitani, Takeo Miyamura, Hirofumi Hojo, Tomotsuna Kamijo
  • Publication number: 20150243420
    Abstract: Provided is soft magnetic powder used to manufacture a dust core having good mechanical strength and superior formability while iron loss is reduced. The soft magnetic powder for dust cores according to the invention is soft magnetic mixed powder that includes pure iron powder and soft magnetic iron-base alloy powder, wherein the proportion of the soft magnetic iron-base alloy powder in the mixture is 5 to 60 mass %, the ratio of the modes of the particle size distributions of the soft magnetic iron-base alloy powder and the pure iron powder ((the mode of the particle size distribution of the soft magnetic iron-base alloy powder)/(the mode of the particle size distribution of the pure iron powder)) is 0.9 or more and less than 5, and the ratio Rover/Runder is 1.
    Type: Application
    Filed: September 19, 2013
    Publication date: August 27, 2015
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Hiroyuki Mitani
  • Publication number: 20150187493
    Abstract: A powder magnetic core which exhibits a high compact density and a reduced iron loss can be obtained by compacting a soft magnetic powder in which the mass ratio of soft magnetic powder particles that pass through a filter having an opening of 75 ?m is 95 mass % or higher relative to the whole amount of the soft magnetic powder and which has a mean strain of less than 0.100%.
    Type: Application
    Filed: August 26, 2013
    Publication date: July 2, 2015
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiroyuki Mitani, Takeo Miyamura, Hirofumi Hojo, Tomotsuna Kamijo
  • Publication number: 20140356641
    Abstract: This heat-resistant austenitic stainless steel has a specific composition containing Ce and Zr and has an Hv1/Hv0 ratio of 1.20 or higher, where Hv1 is the average hardness of the area ranging from the surface to a thickness-direction depth of 50 ?m and Hv0 is the average hardness of the thickness-direction central part.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 4, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Shigenobu Namba
  • Publication number: 20140154128
    Abstract: A heat-resistant austenitic stainless steel comprising C: 0.05 to 0.2%, Si: 0.1 to 1%, Mn: 0.1 to 2.5%, Cu: 1 to 4%, Ni: 7 to 12%, Cr: 16 to 20%, Nb: 0.1 to 0.6%, Zr: 0.05 to 0.4%, Ce: 0.005 to 0.1%, Ti: 0.1 to 0.6%, B: 0.0005 to 0.005%, N: 0.001 to 0.15%, S: 0.005% or less (not including 0%), and P: 0.05% or less (not including 0%), with the balance of iron and unavoidable impurities.
    Type: Application
    Filed: May 10, 2012
    Publication date: June 5, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Shigenobu Namba, Kazuki Furuya
  • Publication number: 20130200744
    Abstract: This brushless DC motor (1) is provided with a stator (3) having a main body (312, 322) disposed on both ends thereof in the rotational axis direction with a single exciting coil (2) disposed between the main bodies (312, 322), and with a rotor (4) disposed in the interior of the stator (3), wherein main body (312) is formed with a first magnetic core (31) and main body (322) is formed with a second magnetic core (32), the magnetic cores (31, 32) functioning as a magnetic pole and having protrusions (311, 321), the quantity of which being different for each magnetic core (31, 32). The brushless DC motor (1) uses, as the driving force, the variation in the magnetic resistance between the stator (3) and the rotor (4) in relation to the flow of the magnetic flux generated in the periphery of the exciting coil (2).
    Type: Application
    Filed: October 4, 2011
    Publication date: August 8, 2013
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Takeo Miyamura, Kenichi Inoue, Akira Tsutsui, Hiroshi Hashimoto, Hiroyuki Mitani, Kyoji Zaitsu
  • Patent number: D480098
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: September 30, 2003
    Assignee: Logitech Europe S.A.
    Inventors: Carlo Bernoulli, Herbert Pfeifer, Kutlu Aricanli, Howard Takeo Miyamura, Susan Egnoto