Patents by Inventor Tetsuya Tamura

Tetsuya Tamura 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: 11345627
    Abstract: The present invention relates to a method of manufacturing an optical fiber preform for obtaining an optical fiber with low transmission loss. A core preform included in the optical fiber preform comprises three or more core portions, which are each produced by a rod-in-collapse method, and in which both their alkali metal element concentration and chlorine concentration are independently controlled. In two or more manufacturing steps of the manufacturing steps for each of the three or more core portions, an alkali metal element is added. As a result, the mean alkali metal element concentration in the whole core preform is controlled to 7 atomic ppm or more and 70 atomic ppm or less.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: May 31, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Haruna, Masaaki Hirano, Yoshiaki Tamura, Yuki Kawaguchi
  • Publication number: 20210191240
    Abstract: A projector according to the disclosure includes a projection system projecting image light onto a target projection surface, and a shutter unit that is arranged at a light incident side of the projection system and that can block an optical path. The shutter unit has a drive motor, a transmission member transmitting a rotational drive force of the drive motor, and a shutter member arranged on the optical path and moving, linked to a movement of the transmission member. The shutter member is provided facing a facing area facing the projection system. At least a part of the transmission member is provided facing the facing area. The drive motor is provided outside the facing area.
    Type: Application
    Filed: December 21, 2020
    Publication date: June 24, 2021
    Inventors: Tetsuya TAMURA, Hiroyuki FURUI
  • Patent number: 10670949
    Abstract: A projector includes a light source apparatus, an image formation apparatus that includes a light modulator and forms an image, the light modulator modulating light outputted from the light source apparatus, a projection optical apparatus that projects the image formed by the image formation apparatus, and an attitude adjustment apparatus that causes the light modulator to pivot around a pivotal axis perpendicular to the optical axis of the projection optical apparatus to adjust the attitude of the light modulator.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 2, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuya Tamura, Takuya Hatano
  • Patent number: 10591811
    Abstract: A projector includes light source, plurality of light modulation devices, light combining device integrated with the plurality of light modulation devices, projection optical device, posture adjustment device that adjusts posture of the light combining device, and control device that controls operation of the posture adjustment device, the posture adjustment device includes lead screw that changes posture of the light combining device, driver that rotates lead screw, shaft member to which rotation of lead screw is transmitted, potentiometer that detects amount of rotation of the shaft member, and photosensor that may be shielded by light shielding portion provided in the shaft member, and the control device includes abnormality determination unit that determines whether or not abnormality has occurred based on detection result by the potentiometer, and return operation unit that, if occurrence of abnormality is determined, returns the light combining device to original position based on detection result by th
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: March 17, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuya Tamura, Kazunori Maeta
  • Patent number: 10364223
    Abstract: Provided is an organic compound, which is represented by the general formula (1): in the general formula (1), R1 and R2 are each independently selected from the group consisting of an alkyl group having 1 or more and 20 or less carbon atoms, an aryl group, an aralkyl group, and a heteroaryl group, R3 and R4 are each independently selected from an alkyl group having 1 or more and 10 or less carbon atoms, and an alkoxy group having 1 or more and 10 or less carbon atoms, and A1? and A2? each independently represent a monovalent anion.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuya Tamura, Satoshi Igawa
  • Patent number: 10361452
    Abstract: A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 23, 2019
    Assignee: Central Glass Company, Limited
    Inventors: Tsutomu Nishizaki, Ryota Esaki, Tetsuya Tamura
  • Patent number: 10328730
    Abstract: A recording apparatus includes a housing which configures at least a portion of an outside of an apparatus main body which is provided with a recorder which performs recording on a medium, a lid body which opens and closes at least a portion of a top portion of the apparatus main body and is capable of tilting, and a tilting shaft of the lid body, in which the tilting shaft is capable of being displaced in a direction intersecting an axial line direction of the tilting shaft, and in which the lid body is capable of tilting from a closed state in which a gap between the housing and an end portion of an opposite side from a free end side is filled to an opened state by the displacement of the tilting shaft.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: June 25, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Shirota, Yoshiyuki Okazawa, Tetsuya Tamura, Kensuke Tamai, Shintaro Miyamoto
  • Patent number: 10310350
    Abstract: An organic compound represented by General Formula (1), in which, in General Formula (1), R1 represents an alkyl group or an alkoxy group, X1 and X2 are each independently selected from an alkyl group which may have a substituent, an aryl group which may have a substituent, or an aralkyl group which may have a substituent, and A1? and A2? each independently represent a monovalent anion.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: June 4, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Igawa, Jun Yamamoto, Kenji Yamada, Tetsuya Tamura
  • Publication number: 20190101811
    Abstract: A projector includes a light source apparatus, an image formation apparatus that includes a light modulator and forms an image, the light modulator modulating light outputted from the light source apparatus, a projection optical apparatus that projects the image formed by the image formation apparatus, and an attitude adjustment apparatus that causes the light modulator to pivot around a pivotal axis perpendicular to the optical axis of the projection optical apparatus to adjust the attitude of the light modulator.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuya TAMURA, Takuya HATANO
  • Publication number: 20190101812
    Abstract: A projector includes light source, plurality of light modulation devices, light combining device integrated with the plurality of light modulation devices, projection optical device, posture adjustment device that adjusts posture of the light combining device, and control device that controls operation of the posture adjustment device, the posture adjustment device includes lead screw that changes posture of the light combining device, driver that rotates lead screw, shaft member to which rotation of lead screw is transmitted, potentiometer that detects amount of rotation of the shaft member, and photosensor that may be shielded by light shielding portion provided in the shaft member, and the control device includes abnormality determination unit that determines whether or not abnormality has occurred based on detection result by the potentiometer, and return operation unit that, if occurrence of abnormality is determined, returns the light combining device to original position based on detection result by th
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuya TAMURA, Kazunori MAETA
  • Publication number: 20190002758
    Abstract: An organic compound is represented by general formula (1) below: where X1 and X2 are each independently selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group; R11 to R16 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a heterocyclic group, and a halogen atom; R21 and R22 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, and an aralkyl group; and A1? and A2? each independently represent a monovalent anion.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 3, 2019
    Inventors: Satoshi Igawa, Jun Yamamoto, Kenji Yamada, Tetsuya Tamura
  • Publication number: 20180354614
    Abstract: A vertical take-off and landing aircraft according to an embodiment of the present disclosure includes: a pair of ducted fans; a fuselage that is disposed at a lower position than the ducted fans; a frame body that connects the fuselage and the ducted fans; and a stabilizer fin that is disposed at a position at which the stabilizer fin does not obstruct airflows from the ducted fans, which is a position that is lower than an airframe center of gravity and which is rearward of the fuselage.
    Type: Application
    Filed: August 22, 2018
    Publication date: December 13, 2018
    Applicant: IHI Corporation
    Inventors: Masayoshi TUNEKAWA, Tetsuya TAMURA, Masao HASEGAWA
  • Patent number: 10118413
    Abstract: A recording apparatus includes a medium container to store a medium, feeding rollers to be switched between a feeding state in which the feeding rollers are in contact with the medium and a separated state in which the feeding rollers are separated from the medium, a reversing path for reversing the medium that has been fed from the medium container, a recorder to perform recording on the medium that has been reversed by the reversing path, a back-feed path for introducing the medium that has been fed in the reverse direction from the recording region in which recording has been performed by the recorder toward the reversing path, and a nip roller configured to nip the medium within the back-feed path. At least a portion of the feeding rollers that are in the separated state overlaps the nip roller in the direction of the height of the recording apparatus.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: November 6, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuya Shirane, Tetsuya Tamura, Toshio Miyake
  • Publication number: 20180297697
    Abstract: A vertical takeoff and landing aircraft includes a pair of ducted fans adapted to generate lift and thrust, a frame adapted to couple together the ducted fans, a power source adapted to supply power to the ducted fans, and legs adapted to support an airframe at the time of landing, in which one of the ducted fans is inclined tangentially to a rotational direction on the side farther from the other ducted fan.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 18, 2018
    Applicant: IHI Corporation
    Inventors: Masayoshi TUNEKAWA, Masao HASEGAWA, Tetsuya TAMURA
  • Publication number: 20180237393
    Abstract: Provided is an organic compound, which is represented by the general formula (1): in the general formula (1), R1 and R2 are each independently selected from the group consisting of an alkyl group having 1 or more and 20 or less carbon atoms, an aryl group, an aralkyl group, and a heteroaryl group, R3 and R4 are each independently selected from an alkyl group having 1 or more and 10 or less carbon atoms, and an alkoxy group having 1 or more and 10 or less carbon atoms, and A1? and A2? each independently represent a monovalent anion.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 23, 2018
    Inventors: Tetsuya Tamura, Satoshi Igawa
  • Publication number: 20180219224
    Abstract: Provided is a sintered body which is a composite of an electrode active material and an oxide-based solid electrolyte. The sintered body used is characterized by containing lithium titanate having the spinel crystal structure and/or lithium titanate having the ramsdellite crystal structure, and lithium lanthanum titanate having the perovskite crystal structure. The sintered body can be obtained by, for example, a sintered body production method including a step for obtaining a molded body by molding a mixture of a precursor for lithium titanate and a precursor for lithium lanthanum titanate, or a mixture of lithium titanate and lithium lanthanum titanate, and a sintering step for sintering the molded body, or the like.
    Type: Application
    Filed: July 28, 2016
    Publication date: August 2, 2018
    Inventors: Ryota ESAKI, Tsutomu NISHIZAKI, Tetsuya TAMURA
  • Publication number: 20180175446
    Abstract: A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound.
    Type: Application
    Filed: July 13, 2016
    Publication date: June 21, 2018
    Applicant: Central Glass Company, Limited
    Inventors: Tsutomu NISHIZAKI, Ryota ESAKI, Tetsuya TAMURA
  • Patent number: 9994312
    Abstract: A vertical take-off and landing aircraft includes a propulsion mechanism that generates lift and thrust, a main frame that supports seating and a landing undercarriage, a sub-frame which supports the propulsion mechanism and is arranged so as to be swingable back and forth relative to the main frame, a motive power supply unit supported by the main frame and supplying motive power to the propulsion mechanism, a control stick connected to the sub-frame, and a main wing arranged on the propulsion mechanism, wherein the main wing is formed to be retracted to a position not interfering with an air flow of the propulsion mechanism in a normal time and to be movable to a position where lift is generated when thrust is lost. Gliding is made possible even if thrust is lost while increasing in size of a fuselage is avoided.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: June 12, 2018
    Assignee: IHI CORPORATION
    Inventors: Masayoshi Tsunekawa, Tetsuya Tamura
  • Patent number: 9963227
    Abstract: There is provided a vertical take-off and landing aircraft including: a propulsion mechanism for generating lift and thrust; a power supply unit (e.g. an engine as a power source) for supplying power to the propulsion mechanism; a main frame for supporting the engine, a seat, and a landing undercarriage; a sub-frame for supporting the propulsion mechanism; a frame coupling unit for rotatably coupling the main frame and the sub-frame; and a control stick connected to the sub-frame, so that an occupant sitting on a seat operates a control stick thereby to move the sub-frame relative to the main frame so as to change the orientation of the propulsion mechanism.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 8, 2018
    Assignee: IHI Corporation
    Inventors: Masayoshi Tsunekawa, Tetsuya Tamura
  • Patent number: 9950789
    Abstract: A vertical take-off and landing aircraft including a propulsion mechanism that generates lift and thrust, a main frame that supports seating and a landing undercarriage, a subframe which supports the propulsion mechanism and which is arranged so as to be swingable back and forth relative to the main frame, motive power supply means supported by the main frame and supplying motive power to the propulsion mechanism, and a control stick connected to the subframe in which the propulsion mechanism includes a pair of ducted fans arranged on a left side and a right side, respectively, of the main frame, swing shafts arranged in the ducted fans, and extending in a horizontal direction, and control vanes connected to the swing shafts, and swinging the control vane enables the subframe to move relative to the main frame. Maneuverability can be improved with addition of control mechanisms restrained.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: April 24, 2018
    Assignee: IHI CORPORATION
    Inventors: Masayoshi Tsunekawa, Tetsuya Tamura