Patents by Inventor Kazuhiro Hirose

Kazuhiro Hirose 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: 11002342
    Abstract: A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: May 11, 2021
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Tsutomu Matsunaga, Naoki Mizukami, Kazuhiro Hirose
  • Patent number: 10626976
    Abstract: A scissor gear oil supplying structure includes: a scissor gear that is provided on an outer the circumference of a tip end portion of a shaft; a first oil passage; a second oil passage that extends from the first oil passage in the radial direction; an extension hole that is opened at the front end surface of the shaft; a female screw that is formed in the first oil passage on the rear side of the second oil passage; a rotating member; and a bolt that is inserted into the extension hole and the first oil passage to fasten the rotating member to the shaft and is screwed into the female screw, in which lubricating oil is guided from the first oil passage to the second oil passage along a gap between thread grooves of the female screw and thread ridges of the bolt.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: April 21, 2020
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Hiroaki Mori, Kazuhiro Hirose, Tsutomu Asakura, Naoki Mizukami
  • Publication number: 20190160546
    Abstract: A surface-coated cutting tool includes a substrate and a coating film. The coating film includes an alternate layer. The alternate layer includes a first layer having a first composition and a second layer having a second composition. The alternate layer is formed by alternately stacking at least one first layer and at least one second layer. The first layer and the second layer each have a thickness not smaller than 2 nm and not greater than 100 nm. The first composition is expressed as TiaAlbSicN (0.25?a?0.45, 0.55?b?0.75, 0?c?0.1, a+b+c=1). The second composition is expressed as TidAleSifN (0.35?d?0.55, 0.45?e?0.65, 0?f?0.1, d+e+f=1). The first composition and the second composition satisfy a condition of 0.05?d?a?0.2 and 0.05?b?e?0.2.
    Type: Application
    Filed: March 3, 2017
    Publication date: May 30, 2019
    Inventors: Shuhei Misumi, Haruyo Fukui, Shinya Imamura, Kazuhiro Hirose, Hiroki Takeshita
  • Publication number: 20180335111
    Abstract: A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.
    Type: Application
    Filed: November 11, 2016
    Publication date: November 22, 2018
    Inventors: Tsutomu MATSUNAGA, Naoki MIZUKAMI, Kazuhiro HIROSE
  • Publication number: 20180328478
    Abstract: A scissor gear oil supplying structure includes: a scissor gear that is provided on an outer the circumference of a tip end portion of a shaft; a first oil passage; a second oil passage that extends from the first oil passage in the radial direction; an extension hole that is opened at the front end surface of the shaft; a female screw that is formed in the first oil passage on the rear side of the second oil passage; a rotating member; and a bolt that is inserted into the extension hole and the first oil passage to fasten the rotating member to the shaft and is screwed into the female screw, in which lubricating oil is guided from the first oil passage to the second oil passage along a gap between thread grooves of the female screw and thread ridges of the bolt.
    Type: Application
    Filed: November 11, 2016
    Publication date: November 15, 2018
    Inventors: Hiroaki MORI, Kazuhiro HIROSE, Tsutomu ASAKURA, Naoki MIZUKAMI
  • Patent number: 9962771
    Abstract: A surface-coated tool includes a substrate and a coating film formed on the substrate. The coating film includes an alternate layer in which one or more A layers and one or more B layers are alternately stacked. The A layer and the B layer each have a thickness not smaller than 2 nm and not greater than 100 nm. An average composition of the A layer is expressed as TiaAlbSicN (0.5<a<0.8, 0.2<b<0.4, 0.01<c<0.1, a+b+c=1), an average composition of the B layer is expressed as TidAleSifN (0.4<d<0.6, 0.3<e<0.7, 0.01<f<0.1, d+e+f=1), and a condition of 0.05<A?D?0.2 AND 0.05<E?B?0.2 is satisfied.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: May 8, 2018
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Keizo Tanaka, Hiroki Takeshita, Kazuhiro Hirose, Haruyo Fukui
  • Publication number: 20180099335
    Abstract: A surface-coated cutting tool includes a base material and a coating film formed on a surface of the base material. The coating film includes a first alternating layer and a second alternating layer formed on the first alternating layer. The first alternating layer includes first and second layers. The second alternating layer includes third and fourth layers. One or a plurality of the first layers and one or a plurality of the second layers are layered alternately, and one or a plurality of the third layers and one or a plurality of the fourth layers are layered alternately.
    Type: Application
    Filed: March 2, 2017
    Publication date: April 12, 2018
    Inventors: Hiroki Takeshita, Shuhei Misumi, Haruyo Fukui, Shinya Imamura, Kazuhiro Hirose
  • Patent number: 9498828
    Abstract: A cutting tool includes a substrate composed of a cermet. The cermet includes a hard phase including compounds containing Ti, at least one metal other than Ti selected from groups 4, 5, and 6 of the periodic table, and at least one element of carbon and nitrogen, a binder phase including, as a main component, an iron group metal, and unavoidable impurities. At least one type of particles selected from alumina particles and zirconia particles with an average particle size of 0.5 ?m or more and 5 ?m or less is scattered over a surface of a rake face of the substrate, and the concentration of at least one element of aluminum and zirconium in the surface is 0.5 at % or more and 5 at % or less.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: November 22, 2016
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventor: Kazuhiro Hirose
  • Publication number: 20160175939
    Abstract: A surface-coated tool includes a substrate and a coating film formed on the substrate. The coating film includes an alternate layer in which one or more A layers and one or more B layers are alternately stacked. The A layer and the B layer each have a thickness not smaller than 2 nm and not greater than 100 nm. An average composition of the A layer is expressed as TiaAlbSicN (0.5<a<0.8, 0.2<b<0.4, 0.01<c<0.1, a+b+c=1), an average composition of the B layer is expressed as TidAleSifN (0.4<d<0.6, 0.3<e<0.7, 0.01<f<0.1, d+e+f=1), and a condition of 0.05<A-D?0.2 AND 0.05<E-B?0.2 is satisfied.
    Type: Application
    Filed: May 19, 2015
    Publication date: June 23, 2016
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Keizo Tanaka, Hiroki Takeshita, Kazuhiro Hirose, Haruyo Fukui
  • Publication number: 20150023745
    Abstract: A cutting tool includes a substrate composed of a cermet. The cermet includes a hard phase including compounds containing Ti, at least one metal other than Ti selected from groups 4, 5, and 6 of the periodic table, and at least one element of carbon and nitrogen, a binder phase including, as a main component, an iron group metal, and unavoidable impurities. At least one type of particles selected from alumina particles and zirconia particles with an average particle size of 0.5 ?m or more and 5 ?m or less is scattered over a surface of a rake face of the substrate, and the concentration of at least one element of aluminum and zirconium in the surface is 0.5 at % or more and 5 at % or less.
    Type: Application
    Filed: February 15, 2013
    Publication date: January 22, 2015
    Inventor: Kazuhiro Hirose
  • Patent number: 8801816
    Abstract: There are provided a cemented carbide high in thermal diffusivity and excellent in wear resistance, and a cutting tool including a base material formed of this cemented carbide. The cemented carbide is a WC based cemented carbide in which a hard phase mainly constituted of WC grains is bound by a binder phase mainly constituted of Co, and is used for a cutting tool. The binder phase is substantially constituted of Co, or Co and Ni. A total content of Co and Ni is not less than 4.5 mass % and not more than 15 mass %. In this cemented carbide, the WC grains have an average diameter of not less than 0.4 ?m and not more than 4 ?m.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: August 12, 2014
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp., A.L.M.T. Corp.
    Inventors: Takuya Okuno, Kazuhiro Hirose, Hideki Moriguchi, Akihiko Ikegaya, Kazuo Sasaya, Yoshiharu Yamamoto
  • Patent number: 8758906
    Abstract: A soft magnetic material includes a plurality of composite magnetic particles. Each of the plurality of composite magnetic particles has: a metal magnetic particle including iron; a lower film surrounding the surface of the metal magnetic particle and including a nonferrous metal; and an insulating upper film surrounding the surface of the lower film and including at least one of oxygen and carbon. The nonferrous metal has an affinity with the at least one of oxygen and carbon included in the upper film that is larger than such affinity of iron; or the nonferrous metal has a diffusion coefficient with respect to the at least one of oxygen and carbon included in the upper film that is smaller than such diffusion coefficient of iron. This configuration provides desirable magnetic properties.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: June 24, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toru Maeda, Naoto Igarashi, Haruhisa Toyoda, Kazuhiro Hirose
  • Publication number: 20120144753
    Abstract: There are provided a cemented carbide high in thermal diffusivity and excellent in wear resistance, and a cutting tool including a base material formed of this cemented carbide. The cemented carbide is a WC based cemented carbide in which a hard phase mainly constituted of WC grains is bound by a binder phase mainly constituted of Co, and is used for a cutting tool. The binder phase is substantially constituted of Co, or Co and Ni. A total content of Co and Ni is not less than 4.5 mass % and not more than 15 mass %. In this cemented carbide, the WC grains have an average diameter of not less than 0.4 ?m and not more than 4 ?m.
    Type: Application
    Filed: August 11, 2010
    Publication date: June 14, 2012
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., A.L.M.T. CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Takuya Okuno, Kazuhiro Hirose, Hideki Moriguchi, Akihiko Ikegaya, Kazuo Sasaya, Yoshiharu Yamamoto
  • Patent number: 8008675
    Abstract: The optical mounting package of the present invention is featured by mounting a silicon frame on an insulating substrate for mounting the optical element. The package of the present invention is also featured by that the frame mounted on the insulating substrate for mounting the optical element is made of silicon. A method of manufacturing the package of the present invention is featured by mounting the silicon wafer on the insulating substrate.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: August 30, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Takemori, Satoshi Higashiyama, Kazuhiro Hirose
  • Patent number: 7998361
    Abstract: A soft magnetic material includes: a plurality of composite magnetic particles formed from a metal magnetic particle and an insulative coating surrounding a surface of the metal magnetic particle and containing metallic salt phosphate and/or oxide; and a lubricant formed as fine particles added at a proportion of at least 0.001 percent by mass and no more than 0.1 percent by mass relative to the plurality of composite magnetic particles. With this structure, superior lubrication is provided during compacting and desired magnetic characteristics can be obtained after compacting.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: August 16, 2011
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuhiro Hirose, Haruhisa Toyoda, Takao Nishioka, Naoto Igarashi, Toru Maeda, Yoshiyuki Shimada
  • Patent number: 7758706
    Abstract: A method for producing a dust core compact includes the steps of forming a compact component by pressure-forming a soft magnetic powder having an average particle diameter Da under a pressure Pa, and forming a compact by pressure-forming a soft magnetic powder having an average particle diameter Db and the compact component under a pressure Pb. Average particle diameters Da and Db of the soft magnetic powders satisfy relationship Da/Db?2, and pressures Pa and Pb applied during the pressure-forming satisfy relationship Pa/Pb?½. With this structure, a method for producing a dust core compact exhibiting a high strength and capable of being fabricated even when it has a complex shape, and the dust core compact can be provided.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: July 20, 2010
    Assignees: Sumitomo Electric Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhiro Hirose, Haruhisa Toyoda, Atsushi Sato, Takao Nishioka, Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu, Kenji Harada
  • Patent number: 7682695
    Abstract: The object of the present invention is to provide a powder core and method for making the same that is equipped with insulative coating having superior heat resistance, with the coating making it possible to adequately restrict the flow of eddy currents between particles. The powder core is equipped with a plurality of compound magnetic particles bonded to each other. Each of said plurality of composite magnetic particles includes: a metal magnetic particle 10; an insulative lower layer coating 20 surrounding a surface 10a of said metal magnetic particle 10; an upper layer coating 30 surrounding said lower layer coating 20 and containing silicon; and dispersed particles 50 containing a metal oxide compound and disposed in said lower layer coating 20 and/or said upper layer coating 30. A mean particle diameter R of the dispersed particles 50 meets the condition 10 nm<R?2 T, where the average thickness of the coating combining the lower layer coating 20 and the upper layer coating 30 is T.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: March 23, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hirokazu Kugai, Naoto Igarashi, Toru Maeda, Kazuhiro Hirose, Haruhisa Toyoda, Koji Mimura, Takao Nishioka
  • Patent number: 7678174
    Abstract: A soft magnetic material has an iron based powder that has an insulating coating on the surface and an ester wax. The ester wax is added in an amount not less than 0.02% by weight and not more than 0.6% by weight in relation to the soft magnetic material. Consequently, seizure between a metal mold and a material to be molded at the time of molding can be suppressed and the arising of a black residue can be prevented.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: March 16, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Terukazu Tokuoka, Kazuhiro Hirose, Haruhisa Toyoda, Takao Nishioka, Kouhei Sawada
  • Patent number: 7674342
    Abstract: A method of producing a soft magnetic material includes the steps of preparing soft magnetic powder containing a plurality of soft magnetic particles etching the soft magnetic powder to remove surfaces of the soft magnetic particles and, after the etching step, heat-treating the soft magnetic powder in a finely divided state at a temperature of not less than 400° C. and not more than 900° C. By this method configured as above, desired magnetic characteristics can be obtained.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: March 9, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toru Maeda, Naoto Igarashi, Kazuhiro Hirose, Haruhisa Toyoda
  • Patent number: 7641745
    Abstract: A soft magnetic material used for producing a powder compact has a plurality of iron particles having a Vickers hardness HV of less than 800 and satisfying the relationship of ?/??2.5, where ? represents the specific surface area of the iron particles measured by a gas adsorption method (Brunauer-Emmett-Teller (BET) method) and ? represents the apparent specific surface area of the iron particles calculated from the average particle diameter measured by a laser diffraction/scattering method.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: January 5, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuhiro Hirose, Haruhisa Toyoda, Takao Nishioka