Patents by Inventor Atsushi Umeda

Atsushi Umeda 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: 10608164
    Abstract: A piezoelectric thin film composed of aluminum nitride and which contains magnesium and 31 to 120 atomic percent of niobium relative to 100 atomic percent of the magnesium, and the total content of the magnesium and the niobium relative to the total sum of contents of the magnesium, the niobium and the aluminum nitride falls within the range of 10 to 67 atomic percent.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: March 31, 2020
    Assignees: MURATA MANUFACTURING CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Keiichi Umeda, Atsushi Honda, Morito Akiyama, Keiko Nishikubo, Toshimi Nagase
  • Publication number: 20190377168
    Abstract: A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive lens component, wherein a distance between the first lens group (G1) and the lens group (G3) having the positive lens component changes during zooming, at least one lens surface of the positive lens component has an aspherical surface, and the following conditional expression, 0.40<fp/fGp<3.60 is satisfied, where fp: a focal length of the positive lens component, and fGp: a focal length of the lens group (G3) having the positive lens component.
    Type: Application
    Filed: October 5, 2017
    Publication date: December 12, 2019
    Inventors: Takeshi UMEDA, Tomoki ITO, Atsushi SHIBAYAMA
  • Patent number: 10475984
    Abstract: A germanium-containing aluminum nitride piezoelectric film and a method for manufacturing an aluminum nitride piezoelectric film in which a germanium-containing aluminum nitride piezoelectric film is grown on a substrate by sputtering.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: November 12, 2019
    Assignees: MURATA MANUFACTURING CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Keiichi Umeda, Morito Akiyama, Toshimi Nagase, Keiko Nishikubo, Atsushi Honda
  • Publication number: 20190271836
    Abstract: A zoom optical system (ZL) comprises a first negative lens group (G2) having a negative refractive power; and a second negative lens group (G4) disposed closer to an image than the first negative lens group (G2), wherein a distance between the first negative lens group (G2) and the second negative lens group (G4) changes during zooming, at least part of the first negative lens group (G2) is movable so as to have a displacement component in a direction perpendicular to an optical axis, at least part of the second negative lens group (G4) is movable along the optical axis during focusing, and the following conditional expression, 0.50<fGb/fGa<2.60 is satisfied, where, fGa: a focal length of the first negative lens group (G2), and fGb: a focal length of the second negative lens group (G4).
    Type: Application
    Filed: October 5, 2017
    Publication date: September 5, 2019
    Inventors: Takeshi UMEDA, Tomoki ITO, Atsushi SHIBAYAMA
  • Patent number: 10158262
    Abstract: A stator for an electric rotating machine includes an annular stator core, an outer cylinder fitted on a radially outer surface of the stator core, and a stator coil mounted on the stator core. The stator core is comprised of a plurality of stator core segments that are arranged in a circumferential direction of the stator core so as to adjoin one another in the circumferential direction. The stator coil is fixed to the stator core by a thermosetting resin that is set by induction-heating the stator core. Each of the stator core segments is formed by laminating a plurality of steel sheets in an axial direction of the stator core and fixing at least some of the steel sheets by staking. The number of staking portions formed in one of the steel sheets is different from the number of staking portions formed in another one of the steel sheets.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 18, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yuichi Kudose, Atsushi Umeda
  • Publication number: 20170353074
    Abstract: A rotor for a rotating electric machine includes a field core having a plurality of claw-shaped magnetic pole portions, a field coil wound on the field core, and a hollow cylindrical core member disposed to cover radially outer peripheries of the claw-shaped magnetic pole portions of the field core. The core member has a plurality of first electrically-insulating portions that are spaced at first intervals in an axial direction of the core member. Each of the claw-shaped magnetic pole portions of the field core has a radially outer peripheral surface abutting the core member and a plurality of second electrically-insulating portions provided on the radially outer peripheral surface. The second electrically-insulating portions are spaced at second intervals in the axial direction of the core member.
    Type: Application
    Filed: June 2, 2017
    Publication date: December 7, 2017
    Applicant: DENSO CORPORATION
    Inventors: Yuuki TAKAHASHI, Atsushi UMEDA
  • Patent number: 9137855
    Abstract: When a partial pressure exceeding a Zener voltage of a Zener diode is applied to a first limiting circuit by a positive voltage applied to input terminals by an AC power supply, the first limiting circuit allows a current such that a photo transistor of the first detection circuit is turned on. When a partial pressure exceeding a total value of Zener voltages of Zener diodes is applied to a second limiting circuit by a negative voltage applied to the input terminals, the second limiting circuit allows a current such that a photo transistor of a second detection circuit is turned on. Therefore, it is possible to detect a voltage input from the AC power supply by turning on and off the photo transistors and to detect a voltage input from the AC power supply using a simpler circuit configuration.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: September 15, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Atsushi Umeda
  • Publication number: 20150256037
    Abstract: A stator for an electric rotating machine includes an annular stator core, an outer cylinder fitted on a radially outer surface of the stator core, and a stator coil mounted on the stator core. The stator core is comprised of a plurality of stator core segments that are arranged in a circumferential direction of the stator core so as to adjoin one another in the circumferential direction. The stator coil is fixed to the stator core by a thermosetting resin that is set by induction-heating the stator core. Each of the stator core segments is formed by laminating a plurality of steel sheets in an axial direction of the stator core and fixing at least some of the steel sheets by staking. The number of staking portions formed in one of the steel sheets is different from the number of staking portions formed in another one of the steel sheets.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 10, 2015
    Inventors: Yuichi KUDOSE, Atsushi UMEDA
  • Publication number: 20150256035
    Abstract: A stator for an electric rotating machine includes an annular stator core, an outer cylinder fitted on a radially outer surface of the stator core, and a stator coil mounted on the stator core. The stator core is comprised of a plurality of stator core segments that are arranged in a circumferential direction of the stator core so as to adjoin one another in the circumferential direction. The stator coil is fixed to the stator core by a thermosetting resin that is set by induction-heating the stator core. Each of the stator core segments is formed by laminating, in an axial direction of the stator core, at least two types of steel sheets having different thicknesses.
    Type: Application
    Filed: March 3, 2015
    Publication date: September 10, 2015
    Inventors: Yuichi KUDOSE, Atsushi UMEDA
  • Patent number: 9130374
    Abstract: A switch control unit detects a power supply voltage of a heater detected by a voltage detection unit, and switch is performed on a load state of the heater in a range from a first load state to a fourth load state when the detected power supply voltage falls into a predetermined first domain. On the other hand, the switch is performed on the load state that ranges from the first load state to the third load state when the detected power supply voltage falls into a predetermined second domain that is higher in voltage than the first domain. That is, when the power supply voltage is in the second domain that is higher in voltage than the first domain, a limitation is imposed on the switch to the fourth load state where a combined resistance value is the lowest among the first and fourth load states.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: September 8, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Atsushi Umeda
  • Patent number: 8779643
    Abstract: A stator includes a stator core and a stator coil comprised of a plurality of electric wires. Each of the electric wires has, at least, first, second, and third in-slot portions and first and second turn portions. The first to third in-slot portions are respectively received in three different slots of the stator core. The first turn portion is located on one axial side of the stator core outside of the slots to connect the first and second in-slot portions. The second turn portion is located on the other axial side of the stator core outside of the slots to connect the second and third in-slot portions. For each of the electric wires, the radial distances of the first to third in-slot portions from the axis of the stator core successively decrease. All of the electric wires are offset from one another in the circumferential direction of the stator core.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: July 15, 2014
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Atsuo Ishizuka
  • Patent number: 8659201
    Abstract: A stator for an electric rotating machine includes a hollow cylindrical stator core having a plurality of slots and a stator coil formed by joining a plurality of electric wires mounted on the stator core. For each joined pair of the electric wires, one of the electric wires has an end portion led out from the radially inner periphery of one of the slots of the stator core while the other electric wire has an end portion led out from the radially outer periphery of another one of the slots of the stator core; the end portions are welded together to form a weld therebetween. Part of the welds formed between the end portions of the joined pairs of the electric wires are located on the radially inner periphery of the stator coil while the remaining welds are located on the radially outer periphery of the stator coil.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: February 25, 2014
    Assignee: Denso Corporation
    Inventors: Ryosuke Utaka, Atsushi Umeda
  • Publication number: 20130235098
    Abstract: A switch control unit detects a power supply voltage of a heater detected by a voltage detection unit, and switch is performed on a load state of the heater in a range from a first load state to a fourth load state when the detected power supply voltage falls into a predetermined first domain. On the other hand, the switch is performed on the load state that ranges from the first load state to the third load state when the detected power supply voltage falls into a predetermined second domain that is higher in voltage than the first domain. That is, when the power supply voltage is in the second domain that is higher in voltage than the first domain, a limitation is imposed on the switch to the fourth load state where a combined resistance value is the lowest among the first and fourth load states.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 12, 2013
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Atsushi Umeda
  • Patent number: 8450899
    Abstract: A stator includes a stator core and a multi-phase stator coil comprised of a plurality of electric wires. Each of the electric wires has first, second, . . . , nth in-slot portions and first, second, . . . , (n?1)th turn portions, where n is an integer not less than 4. The first in-slot portions of the electric wires are located most radially outward and the nth in-slot portions are located most radially inward in the slots of the stator core. Each of the electric wires also has a first end portion positioned on the first in-slot portion side and a second end portion positioned on the nth in-slot portion side. Each of phase windings of the stator coil is formed of at least two of the electric wires. The first end portion of one of the two electric wires is connected to the second end portion of the other electric wire.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: May 28, 2013
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Atsuo Ishizuka, Shigenobu Nakamura
  • Patent number: 8203247
    Abstract: A stator for an electric rotating machine includes a hollow cylindrical stator core and a stator coil made up of a plurality of wave-shaped electric wires. Each of the electric wires has a plurality of in-slot portions, each of which is received in one of slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire. The stator coil includes a plurality of radial position shift portions each of which is provided, in one of the electric wires, in one of the turn portions of the electric wire between an apex part of the turn portion and one of the in-slot portions of the electric wire adjoining the turn portion and is radially bent to shift the radial position of the electric wire.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 19, 2012
    Assignee: Denso Corporation
    Inventors: Atsuo Ishizuka, Atsushi Umeda
  • Patent number: 8193675
    Abstract: A stator includes a hollow cylindrical stator core and a stator coil made up of wave-shaped electric wires. Each of the electric wires has in-slot portions, which are received in slots of the stator core, and turn portions that are located outside of the slots to connect the in-slot portions. The stator coil includes first crank-shaped portions and second crank-shaped portions. Each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of an apex part of one of the turn portions and is radially bent to shift the radial position of the electric wire. The amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions. The second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 5, 2012
    Assignee: Denso Corporation
    Inventors: Atsuo Ishizuka, Atsushi Umeda
  • Patent number: 8106547
    Abstract: A rotary electric machine for vehicles is provided, which includes a rotor, a stator disposed opposed to the rotor, a frame made of aluminum and supporting the rotor and the stator, and a rectifier secured to an outer end face of the frame and having low-loss elements as rectifying elements. A heat insulator is disposed between the rectifier and the frame. With this configuration, deterioration can be prevented in the overall cooling properties, while at the same time the cooling properties of the rectifier can be enhanced.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: January 31, 2012
    Assignee: Denso Corporation
    Inventors: Takatoshi Inokuchi, Atsushi Umeda
  • Patent number: 8083309
    Abstract: A liquid ejection apparatus includes an element that is charged and discharged so as to perform an operation to eject a liquid, an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the element, a charging transistor that amplifies a current of the analog signal while the element is charged, and pushes the amplified current toward the element, the charging transistor having a current source terminal, to which a current source is connected, and a push terminal for pushing the current, and a current source connector that selects at least one current source from among a plurality of current sources according to a voltage of the analog signal, and connects the selected current source to the current source terminal.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: December 27, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Atsushi Umeda
  • Patent number: 8053915
    Abstract: A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine includes a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: November 8, 2011
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Takatoshi Inokuchi
  • Patent number: D700890
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: March 11, 2014
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Atsuo Ishizuka