Patents by Inventor Koji Yamamoto

Koji Yamamoto 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: 11484855
    Abstract: A gas generator including a first igniter, a second igniter, a partition wall that partitions inside a housing into a first space that contains a first gas generating agent and a second space that contains a second gas generating agent, and an inner cylindrical member that houses the first igniter and includes a communication portion at a first end portion, the gas generator further including a closing member that closes a third space that is formed between an inner wall surface of the inner cylindrical member and an outer wall surface of the fixing portion and that connects the communication portion with the first space, the closing member being inhibited from deforming due to pressure from a side of the first space and allowing deformation due to pressure from a side of the third space that negates a closed state between the first space and the third space.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: November 1, 2022
    Assignee: DAICEL CORPORATION
    Inventor: Koji Yamamoto
  • Publication number: 20220341301
    Abstract: A hydrocarbon recovery method for recovering a production fluid containing hydrocarbons from a production well provided in the ground in which Type 1 microorganisms that produce a biological membrane (biofilm) and Type 2 microorganisms that produce carbon dioxide for promoting deposition of calcium carbonate exist, the hydrocarbon recovery method includes injecting, into the production well, a culture medium for increasing the Type 1 microorganisms; injecting, into the production well, a composition used for the Type 2 microorganisms to produce carbon dioxide, decompressing an inside of the production well after the culture medium and the composition are injected, and recovering the hydrocarbons in a state where the inside of the production well is decompressed.
    Type: Application
    Filed: July 8, 2022
    Publication date: October 27, 2022
    Inventors: Koji Yamamoto, Taku Oshima, Toshiro Hata, Jun Yoneda
  • Patent number: 11456725
    Abstract: An acoustic wave device includes a high-acoustic-velocity film, a low-acoustic-velocity film provided on the high-acoustic-velocity film, a piezoelectric layer provided on the low-acoustic-velocity film, and an IDT electrode provided on the piezoelectric layer. An acoustic velocity of bulk waves propagating through the high-acoustic-velocity film is higher than an acoustic velocity of acoustic waves propagating through the piezoelectric layer. An acoustic velocity of bulk waves propagating through the low-acoustic-velocity film is lower than an acoustic velocity of bulk waves propagating through the piezoelectric layer. The low-acoustic-velocity film includes a material including hydrogen atoms.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: September 27, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Koji Yamamoto, Tsutomu Takai, Hideaki Takahashi
  • Publication number: 20220289453
    Abstract: A transport box includes: an outer box formed in a rectangular parallelepiped shape and capable of packing a packed object; and a buffer body disposed between the outer box and the packed object, wherein the buffer body includes medium enclosing buffer members having a resin sheet welded in a bag shape and a medium sealed in the resin sheet, each medium enclosing buffer member of the medium enclosing buffer members includes buffer parts each having a bag shape and enclosing a medium, and a communication flow path that allows the buffer parts adjacent to each other to communicate with each other, the buffer parts are disposed in a straight line, the communication flow path is formed between the buffer parts adjacent to each other and is bendable, and each of the medium enclosing buffer members is disposed in the outer box.
    Type: Application
    Filed: February 8, 2022
    Publication date: September 15, 2022
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi HASHIMOTO, Narutaka YOSHIDA, Koji YAMAMOTO, Hiromi MIZUGUCHI
  • Publication number: 20220276030
    Abstract: A gas generator in which, between an ignition device and an inner cylindrical member, on a side of the lid wall portion, a transfer charge chamber is formed, and on a side of another end portion of a peripheral wall portion, a flow space is formed, the flow space being a space configured to allow combustion gas to flow in from the transfer charge chamber when an igniter is actuated, and being a space configured to allow the combustion gas to flow out to the outside of the inner cylindrical member when the igniter is actuated, and a total cross-sectional area of an inflow path serving a flow path through which the combustion gas flows from the transfer charge chamber into the flow space is configured to be smaller than a cross-sectional area of the flow space.
    Type: Application
    Filed: August 3, 2020
    Publication date: September 1, 2022
    Applicant: Daicel Corporation
    Inventor: Koji Yamamoto
  • Publication number: 20220278667
    Abstract: An acoustic wave device includes first and second electrode fingers on a piezoelectric layer, and third and fourth electrode fingers and a plurality of fourth electrode fingers are provided on the piezoelectric layer. A connection section includes second and third busbars. The second busbar is on the piezoelectric layer and is connected to one end of each of the second electrode fingers. The third busbar is on the piezoelectric layer and is connected to one end of each of the third electrode fingers. A stress relaxation layer is between the connection section and the piezoelectric layer. The stress relaxation layer does not extend to any of a gap between each of the first electrode fingers and the second busbar and a gap between each of the fourth electrode fingers and the third busbar in a plan view from a thickness direction of a support substrate.
    Type: Application
    Filed: May 23, 2022
    Publication date: September 1, 2022
    Inventors: Koji YAMAMOTO, Katsuya DAIMON
  • Publication number: 20220268558
    Abstract: In a gas generator, a closing member includes: a first region exposed to a side of a second combustion chamber in a closed state, a second region in contact with a partition member from a side of the first combustion chamber in the closed state, and an engagement region that engages an engaged member fixed in a housing in the closed state; and the closing member is configured to have one or a plurality of communication holes be in a closed state by the closing member being supported at the partition member in the second region due to combustion pressure of a first gas generating agent and to have the closed state released by at least a part of the closing member, the closing member including a displacement portion that is formed continuously so as to be included at least a part of the first region, being displaced in a direction from the side of the second combustion chamber toward the side of the first combustion chamber by combustion pressure of a second gas generating agent acting on the first region.
    Type: Application
    Filed: January 30, 2020
    Publication date: August 25, 2022
    Applicant: Daicel Corporation
    Inventor: Koji YAMAMOTO
  • Publication number: 20220251682
    Abstract: A highly-productive method for manufacturing a metal foam, capable of easily manufacturing a molded article having a desired shape is provided. A method for manufacturing a metal foam includes dissolving hydrogen in a mixture containing a molten metal and a thickener, and thereby manufacturing a precursor in which an amount of solid-soluted hydrogen in the metal is saturated, charging the precursor into a mold, and solidifying the precursor charged into the mold under a reduced-pressure atmosphere, or solidifying the precursor charged into the mold and then heating the solidified precursor under a reduced-pressure atmosphere.
    Type: Application
    Filed: January 4, 2022
    Publication date: August 11, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Koji YAMAMOTO
  • Patent number: 11389855
    Abstract: The end portion of a first member includes a plate part and a groove. The end portion of a second member includes an edge and two side surfaces. The groove extends around the edge of the second member and the two side surfaces. The groove includes a side surface including an engaging portion. One of the side surfaces of the end portion of the second member includes an engaged portion. A method for manufacturing a swaged structure includes preparing the first member including the plate part and the groove having a wide opening. The method further includes inserting the end portion of the second member into the groove after preparing the first member. The method further includes pressing the plate part in a direction narrowing the opening of the groove to bring the engaging portion into contact with the engaged portion after inserting the second member.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: July 19, 2022
    Assignees: AISIN CORPORATION, HISADA CO., LTD.
    Inventors: Koji Yamamoto, Yohei Amemiya, Takashi Harada, Masashi Saeki, Masahiro Hashiguchi, Yasuchika Sasaki
  • Publication number: 20220182035
    Abstract: An acoustic wave device includes a piezoelectric substrate and an IDT electrode on the piezoelectric substrate. The IDT electrode includes first and second electrode fingers. When the propagation direction of acoustic waves is a first direction and the direction orthogonal or substantially orthogonal to the first direction is a second direction, an intersecting region of the IDT electrode includes a central region located toward the middle in the second direction and first and second edge regions on both sides in the second direction of the central region. The first and second electrode fingers include epitaxially grown oriented films in the central region and portions that do not include the oriented films in the first and second edge regions.
    Type: Application
    Filed: February 24, 2022
    Publication date: June 9, 2022
    Inventors: Katsuya DAIMON, Yasumasa TANIGUCHI, Koji YAMAMOTO
  • Publication number: 20220173132
    Abstract: To make the dimension of an electrostatic protection circuit small with the same maintained high in sensitivity. The electrostatic protection circuit is of the configuration that a first diode and a second diode are connected in series, wherein a semiconductor layer owned by each diode is configured to be sandwiched between a gate electrode and a conductive light shielding film. The light shielding film is formed to overlap with the semiconductor layer and has a wider area than the semiconductor layer. This results in having a gate covering the semiconductor layer from an upper side and a back gate covering the semiconductor layer from a lower side, so that the sensitivity can be maintained high irrespective of decreasing the electrostatic protection circuit in dimension.
    Type: Application
    Filed: February 15, 2022
    Publication date: June 2, 2022
    Inventors: Koji YAMAMOTO, Tatsuya ISHII
  • Patent number: 11349451
    Abstract: An elastic wave device includes a SiNx layer stacked directly or indirectly on a supporting substrate made of a semiconductor material, a piezoelectric film stacked on directly or indirectly the SiNx layer, and an interdigital transducer electrode stacked directly or indirectly on at least one main surface of the piezoelectric film. In the SiNx layer, x is about 1.34 or more and about 1.66 or less.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: May 31, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Tsutomu Takai, Koji Yamamoto, Hideki Iwamoto
  • Patent number: 11333123
    Abstract: A first clamp circuit (4) clamps a voltage between a gate and a first terminal of a switching device (Q1) to equal to or lower than a first clamp voltage. A control circuit (2) controls the switching device (Q1) and includes a driving unit (5) driving the switching device (Q1), an abnormality detecting unit (9) stopping the driving unit (5) upon detection of an abnormality in operation, and a second clamp circuit (10). The second clamp circuit (10) clamps the voltage between the gate and the first terminal to equal to or lower than a second clamp voltage which is lower than the first clamp voltage when the abnormality detecting unit (9) stops the driving unit (5).
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: May 17, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Makoto Ueno, Kazuhiro Nishimura, Koji Yamamoto
  • Patent number: 11332817
    Abstract: A machine component includes a core made up of a steel for machine structural use, and a medium carbon-containing layer and a high carbon-containing layer formed of the steel for machine structural use, the medium carbon-containing layer covering the core, the high carbon-containing layer covering the medium carbon-containing layer and having a carbon concentration of 0.8-1.5%. The high carbon-containing layer is made up of a martensitic structure having carbides dispersed therein and a residual austenitic structure, wherein spheroidized carbides with an aspect ratio of 1.5 or less constitute 90% or more of a total number of the carbides, and the number of spheroidized carbides on prior austenite grain boundaries is 40% or less of the total number of the carbides.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 17, 2022
    Assignee: KOMATSU LTD.
    Inventors: Kensuke Sato, Koji Yamamoto, Yusuke Hiratsuka, Kazuya Hashimoto
  • Patent number: 11326220
    Abstract: A method for producing a machine component excellent in pitting resistance characteristics and toughness includes a carburizing step, performed on a steel material containing 0.13-0.30% C and 0.90-2.00% Cr in mass % and at least one of Si, Mn, Ni, Mo, Nb, V, Ti, B, Al, and N, balance Fe and unavoidable impurities; heating the material to 850-1030° C. to attain carbon concentration in a surface of 0.8-1.5%; cooling the material at an average rate of 5° C./sec or lower from a temperature higher than the Acm point of a surface layer to a cooling end temperature that is at least 50° C. lower than the A1 point to cause the surface layer to have a pearlite or bainite structure with dispersion; spheroidizing annealing at a temperature not higher than the Acm point at the surface layer; heating the material to not higher than the Acm point at the surface layer; and performing tempering.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 10, 2022
    Assignee: KOMATSU LTD.
    Inventors: Kensuke Sato, Koji Yamamoto, Yusuke Hiratsuka, Kazuya Hashimoto
  • Patent number: 11293396
    Abstract: An ion current detection circuit is for detecting an ion current flowing through a spark plug for an internal combustion engine. A detection terminal is to be electrically connected to the spark plug. A reference potential is to be supplied to a reference terminal. At least one protection diode is provided between the detection terminal and the reference terminal. A current detection unit causes a detection current to flow between the detection terminal and the at least one protection diode. A current compensation unit causes a compensation current to flow between the detection terminal and the at least one protection diode.
    Type: Grant
    Filed: December 25, 2018
    Date of Patent: April 5, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamamoto
  • Patent number: 11282870
    Abstract: To make the dimension of an electrostatic protection circuit small with the same maintained high in sensitivity. The electrostatic protection circuit is of the configuration that a first diode and a second diode are connected in series, wherein a semiconductor layer owned by each diode is configured to be sandwiched between a gate electrode and a conductive light shielding film. The light shielding film is formed to overlap with the semiconductor layer and has a wider area than the semiconductor layer. This results in having a gate covering the semiconductor layer from an upper side and a back gate covering the semiconductor layer from a lower side, so that the sensitivity can be maintained high irrespective of decreasing the electrostatic protection circuit in dimension.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: March 22, 2022
    Assignee: Japan Display Inc.
    Inventors: Koji Yamamoto, Tatsuya Ishii
  • Publication number: 20220074717
    Abstract: A gas generator includes a housing, an ignition device, a combustion chamber filled with a gas generating agent, a gas discharge port configured to discharge combustion gas to an outside, and a filter portion disposed between the combustion chamber and the gas discharge port, formed of a metal material, and configured to filter the combustion gas. The filter portion includes a first filter disposed on a side of the combustion chamber and a second filter disposed on a side of the gas discharge port and facing the first filter. The gas generator is provided with a space that is provided between the first filter and the second filter, so as to include a position where the combustion gas flows and to have a predetermined thickness in a direction of flow of the combustion gas, causing a flow rate of the combustion gas flowing into the second filter to decrease due to absence of the metal material.
    Type: Application
    Filed: October 24, 2019
    Publication date: March 10, 2022
    Applicant: DAICEL CORPORATION
    Inventor: Koji YAMAMOTO
  • Publication number: 20220057023
    Abstract: A double pipe includes an outer pipe in which an inner pipe is placed, and a spacer that maintains a clearance between the inner pipe and the outer pipe. At least a part of the spacer is press-fitted by an inner circumferential surface of the outer pipe and an outer circumferential surface of the inner pipe. More specifically, the outer pipe includes a diameter-reduced portion having undergone diameter reduction by plasticity processing. An inner circumferential surface of the diameter-reduced portion is present across the entire circumference other than the opening of the spacer, and presses an outer circumferential surface of the spacer inwardly in the radial direction.
    Type: Application
    Filed: July 21, 2021
    Publication date: February 24, 2022
    Inventors: Koji Yamamoto, Takashi Wagatsuma, Ryoji Noda
  • Publication number: 20220033048
    Abstract: A ballast water treatment system includes: a chemical agent container for containing a chemical agent for a ballast water treatment; a chemical liquid preparation tank having a tank main body for containing the chemical agent supplied from the chemical agent container and water for dissolving the chemical agent, and a mixture part for mixing the chemical agent with the water in the tank main body; a chemical liquid storage tank for storing the chemical liquid obtained by dissolving the chemical agent in the water in the chemical liquid preparation tank; and a chemical liquid supply part for supplying the chemical liquid stored in the chemical liquid storage tank into ballast water.
    Type: Application
    Filed: December 26, 2019
    Publication date: February 3, 2022
    Applicant: Kuraray Co., Ltd.
    Inventors: Koji YAMAMOTO, Mitsuaki YAMAMOTO, Takeshi MATSUDA