Patents by Inventor Yasuhiro Omori

Yasuhiro Omori 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: 20070163687
    Abstract: A component for machine structural use having improved fatigue strength. The component for machine structural use is produced by subjecting at least a part of a steel material to hardening, and the hardened structure is controlled such that the average grain diameter of former austenitic grains is 12 ?m or less and the maximum grain diameter does not exceed four times the average grain diameter.
    Type: Application
    Filed: February 1, 2005
    Publication date: July 19, 2007
    Inventors: Nobutaka Kurosawa, Yasuhiro Omori, Tohru Hayashi, Aklhiro Matsuzaki, Takaaki Toyooka
  • Publication number: 20070000582
    Abstract: The present invention provides a steel material for induction quenching, containing 0.3% to 0.7% of C, 1.1% or less of Si, 0.2% to 1.1% of Mn, 0.05% to 0.6% of Mo, 0.06% or less of S, 0.025% or less of P, 0.25% or less of Al, 0.3% or less of Cr on a mass basis, and the balance being Fe and unavoidable impurities. The steel material has a ferrite structure and a pearlite structure, the total volume fraction of the ferrite structure and the pearlite structure is 90% or more, the thickness of the ferrite structure is 30 ?m or less, and the average prior austenite grain diameter of a hard layer obtained by induction quenching is 12 ?m or less. Since having superior machinability and superior fatigue strength after induction quenching, this steel material is suitable, for an automobile drive shaft, constant velocity joint, and the like.
    Type: Application
    Filed: July 16, 2004
    Publication date: January 4, 2007
    Inventors: Akihiro Matsuzaki, Yasuhiro Omori, Nobutaka Kurosawa, Tohru Hayashi, Takaaki Toyooka, Katsumi Yamada
  • Publication number: 20060162823
    Abstract: The present invention provides a steel product that consists of, by mass %, C: 0.35-0.7%, Si: 0.30-1.1%, Mn: 0.2-2.0%, Al: 0.005-0.25%, Ti: 0.005-0.1%, Mo: 0.05-0.6%, B: 0.0003-0.006%, S: 0.06% or less, P: 0.02% or less, Cr: 0.2% or less, and the balance Fe and inevitable impurities, and has a structure of bainite and/or martensite, the total volume fraction of bainite and martensite being 10% or more, and an induction hardened member that is made of the steel product having a hardened surface layer formed by induction hardening and has a prior austenite grain size of 12 ?m or less through the layer thickness. The member has high fatigue strength and therefore is suitable for an automobile drive shaft, an automobile constant velocity joint or the like.
    Type: Application
    Filed: January 13, 2004
    Publication date: July 27, 2006
    Inventors: Yasuhiro Omori, Tohru Hayashi, Akihiro Matsuzaki, Takaaki Toyooka
  • Patent number: 7079732
    Abstract: An optical device guides propagating light to exit from a desired side surface of a substrate while maintaining sufficient power within a limited size of the substrate and which facilitates adjustment of a mount position of a light-receiving element by increasing allowable tolerance of the mount position of the light-receiving element. The optical device has a substrate, a light propagating direction path formed in the substrate, and a reflection groove formed in an output-side of said light propagating direction path in the substrate. A side wall of the reflection groove is formed to become a convex reflection surface in relation to light which enters from the light propagating direction path, and the light output from the light propagating direction path undergoes total reflection on a side wall forming the reflection surface and lets the reflected light exit from a predetermined side surface of the substrate while enlarging an image.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: July 18, 2006
    Assignee: Fujitsu Limited
    Inventors: Shinji Maruyama, Tomoyuki Itou, Yoshihiro Takahashi, Yasuhiro Omori, Yoshihiko Yoshida, Masaharu Doi
  • Publication number: 20060065328
    Abstract: A machine structural steel product having superior formability of rotary-forming, torsional properties, and quenching-crack resistance is provided which is manufactured using an electric furnace instead of a blast furnace and which removes adverse influences of tramp elements. A drive shaft having a superior static strength and fatigue strength is provided. In particular, the machine structural steel product contains: on a mass percent basis, C: 0.35% to 0.50%; Si: 0.15% or less; Mn: 0.20% to 1.1%; P: 0.02% or less; S: 0.005% to 0.035%; Cr: more than 0.1% to 0.2%; Mo: 0.05% to 0.5%; Ti: 0.01% to 0.05%; Al: 0.01% to 0.05%; N: 0.01% or less; B: 0.0005% to 0.0050%; Cu: 0.06% to 0.25%; and Ni: 0.05% to 0.2%, and in addition, the composition described above is adjusted so that an LD value represented by the following equation (1) satisfies 120 or less. LD=0.569×{7.98×(C)}1/2×(1+4.1Mn)·(1+2.83P)·(1?0.62S)·(1+0.64Si)·(1+2.33Cr)·(1+0.52Ni)·(1+3.14Mo)·(1+0.27Cu)·(1+1.5(0.9?C))}+52.
    Type: Application
    Filed: December 26, 2002
    Publication date: March 30, 2006
    Inventors: Yasuhiro Omori, Akihiro Matsuzaki
  • Publication number: 20050265663
    Abstract: An optical device guides propagating light to exit from a desired side surface of a substrate while maintaining sufficient power within a limited size of the substrate and which facilitates adjustment of a mount position of a light-receiving element by increasing allowable tolerance of the mount position of the light-receiving element. The optical device has a substrate, a light propagating direction path formed in the substrate, and a reflection groove formed in an output-side of said light propagating direction path in the substrate. A side wall of the reflection groove is formed to become a convex reflection surface in relation to light which enters from the light propagating direction path, and the light output from the light propagating direction path undergoes total reflection on a side wall forming the reflection surface and lets the reflected light exit from a predetermined side surface of the substrate while enlarging an image.
    Type: Application
    Filed: January 24, 2005
    Publication date: December 1, 2005
    Applicant: Fujitsu Limited
    Inventors: Shinji Maruyama, Tomoyuki Itou, Yoshihiro Takahashi, Yasuhiro Omori, Yoshihiko Yoshida, Masaharu Doi
  • Patent number: 6454881
    Abstract: Provided is a non heat-treated steel that requires no particular controls over cooling rates and no aging treatments after hot working, that can sufficiently increase tensile strength, yield strength and toughness even at lightly deformed parts, and furthermore, that has excellent material anisotropy and machinability as an alloy steel for machine structures. In other words, it is a non heat-treated steel that contains: C: more than 0.05 mass % to less than 0.10 mass %; Si: 1.0 mass % or less; Mn: more than 2.2 mass % to 5.0 mass %; S: less than 0.020 mass %; Cu: more than 1.0 mass % to 3.0 mass %; Ni: 3.0 mass % or less; Cr: 0.01 to 2.0 mass %; Al: 0.1 mass % or less; Ti: 0.01 to 0.10 mass %; B: 0.0003 to 0.03 mass %; N: 0.0010 to 0.0200 mass %; O: 0.0060 mass % or less; and the balance Fe and inevitable impurities, and that the steel structure is bainitic having block structures at 10% or more in area ratios.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: September 24, 2002
    Assignee: Kawasaki Steel Corporation
    Inventors: Kazukuni Hase, Yasuhiro Omori, Toshiyuki Hoshino, Keniti Amano
  • Patent number: 6162389
    Abstract: A non heat-treated steel of high strength, toughness and machinability which can be used in its as-worked state without calling for any special treatment after working. It contains less than 0.05 wt % C, 0.005 to 2.0 wt % Si, 0.5 to 5.0 wt % Mn, 0.1 to 10.0 wt % Ni, more than 1.0 to 4.0 wt % Cu, 0.0002 to 1.0 wt % Al, 0.005 to 0.50 wt % S and 0.0010 to 0.0200 wt % N.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: December 19, 2000
    Assignee: Kawasaki Steel Corporation
    Inventors: Kazukuni Hase, Takashi Iwamoto, Yasuhiro Omori, Toshiyuki Hoshino, Tohru Hayashi, Keniti Amano, Toshio Fujita
  • Patent number: 6046839
    Abstract: An object of the invention is to provide a polarization scrambler wherein the polarization of linearly polarized signal light can be rotated to facilitate obtaining a minimum degree of polarization, and wherein scrambling operation is possible even if signal light of optional polarization states is input. Accordingly with the polarization scrambler, a polarization rotation section is provided on an input side on a chip on which is formed an optical waveguide, and a polarization scrambling section is provided on an output side. With the polarization rotation section, the polarization of linearly polarized signal light which is transmitted by the optical waveguide is rotated by means of an acousto-optic effect due to an elastic surface wave generated by an electrode, so as to become 45.degree. with respect to a vertical direction of the optical waveguide.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: April 4, 2000
    Assignee: Fujitsu Limited
    Inventors: Tomoyuki Ito, Toshihiro Ohtani, Yoshinobu Kubota, Yasuhiro Omori
  • Patent number: 6033126
    Abstract: An optical waveguide module including a metal package having a bottom surface formed with a chip insertion groove, and a waveguide chip inserted and fixed in the chip insertion groove. The waveguide chip has an optical waveguide formed on a substrate having an electro-optic effect. A signal electrode is formed on the optical waveguide, and a ground electrode is formed on the substrate. The ground electrode is connected to the metal package through first and second ribbons respectively located in the vicinity of first and second bent portions of the signal electrode.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: March 7, 2000
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Omori, Yoshinobu Kubota, Toshihiro Ohtani, Tomoyuki Itoh
  • Patent number: 5963357
    Abstract: An optical modulator for modulating light emitted from a signal light source has a substrate having electrooptic effect, an optical waveguide of a Mach-Zehnder type formed on the substrate, an electrode formed on the substrate to control light propagated in the optical waveguide, an interference light generating means for making radiation light radiated from the optical waveguide and signal light leaking from the optical waveguide interfere with each other to generate interference light, and emitting the interference light from an end surface of the substrate, a photo-detector for monitoring the interference light of the radiation light and the signal light, and a signal controlling circuit for controlling an operating point of the optical modulator according to a change of the interference light monitored by the photo-detector It is thereby possible to prevent degradation of a distinction ratio due to a shift of the operating point of the optical modulator so as to allow stable optical modulation, while faci
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: October 5, 1999
    Assignee: Fujitsu Limited
    Inventors: Yoshinobu Kubota, Yasuhiro Omori, Toshihiro Otani, Tomoyuki Itoh
  • Patent number: 5953466
    Abstract: An optical modulator for modulating light emitted from a signal light source has a substrate having electrooptic effect, an optical waveguide of a Mach-Zehnder type formed on the substrate, an electrode formed on the substrate to control light propagated in the optical waveguide, a light guiding unit for guiding light radiated or leaking from the optical waveguide, an interference light generating means for making light emitted from the light guiding unit and signal light leaking from the optical waveguide interfere with each other to generate interference light, and for emitting the interference light from an end surface of the substrate, a photo-detector for monitoring the interference light obtained by the interference light generating means, and a signal controlling circuit for controlling an operating point of the optical modulator according to a change of the interference light monitored by the photo-detector, thereby stably controlling the operating point of the optical modulator while facilitating a d
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: September 14, 1999
    Assignee: Fujitsu Limited
    Inventors: Yoshinobu Kubota, Yasuhiro Omori, Toshihiro Otani, Tomoyuki Itoh
  • Patent number: 5889912
    Abstract: An optical waveguide device including a package housing having an element mounting surface, an element inserting groove opening to the element mounting surface, and a cutout as a space opening to an inner surface of the element inserting groove; and an optical waveguide element having a dielectric substrate, an optical waveguide formed in a surface of the dielectric substrate, and an electrode formed over the surface of the dielectric substrate, the optical waveguide element being inserted and fixed in the element inserting groove of the package housing by using an adhesive. The cutout opens also to the element mounting surface. In applying the adhesive to the bottom surface of the element inserting groove and inserting the optical waveguide element into the element inserting groove, the adhesive flows into the cutout and is prevented from flowing up to the element mounting surface.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: March 30, 1999
    Assignee: Fujitsu Limited
    Inventors: Toshihiro Otani, Tomoyuki Ito, Yoshinobu Kubota, Yasuhiro Omori
  • Patent number: 5764400
    Abstract: Disclosed herein is an optical modulator module including an optical waveguide structure of a Mach-Zehnder type, for example, an electrode for switching a coupling mode where an output beam is obtained from the optical waveguide structure and a leakage mode where a leakage beam deflects from the optical waveguide structure, a photodetector having a photodetecting surface for receiving the leakage beam, and a mechanism for converting a beam parameter of the leakage beam so as to prevent close contact of the photodetecting surface with the optical waveguide structure. The optical modulator module allows monitoring of optical power by the use of the leakage beam and is improved in manufacturability.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: June 9, 1998
    Assignee: Fujitsu Ltd.
    Inventors: Tomoyuki Itou, Hisashi Takamatsu, Toshihiro Otani, Yoshinobu Kubota, Yasuhiro Omori