Patents by Inventor Masaki Koyama

Masaki Koyama 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: 20240136593
    Abstract: A solid-state secondary battery is provided which can suppress chemical degradation from charging/discharging. A solid-state secondary battery includes a laminate body made by a positive electrode layer, solid electrolyte layer and negative electrode layer being laminated, and a first solid electrolyte having oxidation resistance and a second solid electrolyte having reduction resistance, in which content of a first solid electrolyte is greater than a second solid electrolyte in a solid electrolyte contained in the positive electrode layer, content of the first solid electrolyte is greater than the second solid electrolyte in a solid electrolyte contained in a region on a side of the positive electrode layer of the solid electrolyte layer, and content of the second solid electrolyte is greater than content of the first solid electrolyte in a solid electrolyte contained in a region on a side of the negative electrode layer of the solid electrolyte layer.
    Type: Application
    Filed: August 1, 2023
    Publication date: April 25, 2024
    Inventors: Rio KOYAMA, Satoshi YONEZAWA, Masaki KUNIGAMI
  • Publication number: 20230392666
    Abstract: A sealing device for hydraulic equipment according to the invention includes an outer member having an annular shape, an inner member inserted into the outer member, and a seal ring housed in an annular groove disposed in the outer circumference of the inner member and abutting on the outer member to prevent a liquid from passing through a gap between the outer member and the inner member. The annular groove of the inner member has a bottom portion including a recess for restraining axial displacement of the seal ring relative to the annular groove.
    Type: Application
    Filed: November 30, 2021
    Publication date: December 7, 2023
    Applicant: KYB Corporation
    Inventors: Masaki KOYAMA, Norihiro ASANO, Takeshi YASUI
  • Patent number: 11753084
    Abstract: A vehicle body structure includes a body side section (1) configured of a first composite component (10) and a body lower section (2) configured of a second composite component (20). Each of the first and second composite components (10, 20) comprises a metal plate (11, 21) and a fiber reinforced thermoplastic portion (12, 22) that contains discontinuous fibers. The fiber reinforced thermoplastic portion (12) of the first composite component (10) includes a lining layer formed on the metal plate (11) and reinforcing ribs raised from the lining layer. The fiber reinforced thermoplastic portion (22) of the second composite component (20) includes a planar portion (24) infilled in an opening (23) opened on the metal plate 21. The discontinuous fibers in the fiber reinforced thermoplastic portion (22) of the second composite component (20) are longer than the discontinuous fibers in the fiber reinforced thermoplastic portion (12) of the first composite component (10).
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: September 12, 2023
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Takashi Oda, Shinichiro Takemoto, Toshikazu Torigaki, Naoya Matsuoka, Zhe Jiang, Masaki Koyama
  • Patent number: 11745682
    Abstract: A vehicle bumper is provided integrally to include metal beam-extension portions on both right-and-left end sides of a metal bumper-beam portion. In this vehicle bumper, the bumper-beam portion and the beam-extension portion include a vertical wall portion, an upper wall portion and a lower wall portion, and a resin reinforcing rib is joined to inner surfaces of a void formed of each of the wall portions. In addition, in this vehicle bumper, an extension dimension of the upper wall portion and the lower wall portion of the beam-extension portion is larger than an extension dimension of the upper wall portion and the lower wall portion in the bumper-beam portion, the resin reinforcing rib in the beam-extension portion is joined to the vertical wall portion, the upper wall portion, and the lower wall portion of the beam-extension portion; and the stiffness of the bumper-beam portion is higher than the stiffness of the beam-extension portion.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: September 5, 2023
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Shinichirou Takemoto, Shinya Mihara, Masaki Koyama
  • Patent number: 11749675
    Abstract: Between a source electrode (25) of a main device (24) and a current sensing electrode (22) of a current detection device (21), a resistor for detecting current is connected. Dielectric withstand voltage of gate insulator (36) is larger than a product of the resistor and maximal current flowing through the current detection device (21) with reverse bias. A diffusion length of a p-body region (32) of the main device (24) is shorter than that of a p-body (31) of the current detection device (21). A curvature radius at an end portion of the p-body region (32) of the main device (24) is smaller than that of the p-body (31) of the current detection device (21). As a result, at the inverse bias, electric field at the end portion of the p-body region (32) of the main device (24) becomes stronger than that of the p-body region (31) of the current detection device (21). Consequently, avalanche breakdown tends to occur earlier in the main device 24 than the current detection device (21).
    Type: Grant
    Filed: January 7, 2021
    Date of Patent: September 5, 2023
    Assignees: FUJI ELECTRIC CO., LTD., DENSO CORPORATION
    Inventors: Seiji Momota, Hitoshi Abe, Takashi Shiigi, Takeshi Fujii, Koh Yoshikawa, Tetsutaro Imagawa, Masaki Koyama, Makoto Asai
  • Patent number: 11697233
    Abstract: Provided is a composite (A) including a metal plate (B) and a reinforcing member (C) that is made of a resin. The metal plate (B) includes a joint portion (2) that is continuous with one end of a body portion (1), a hole that is formed through the body portion (1) in a thickness direction of the body portion (1) in the proximity of the joint portion (2), and a guide portion provided around the hole. The reinforcing member (C) continuously includes a main portion (5), a coupling portion (6) formed in the hole (3), and a locking portion (7) that is held in close contact with a surface on another side of the body portion (1). The guide portion (4) is at least one of a protruding portion provided on at least one of a rear side and a lateral side relative to the hole (3) in a direction from the body portion (1) to the joint portion (2), and a recessed portion extended from a front side relative to the hole (3) to the hole (3) in the direction from the body portion to the joint portion.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: July 11, 2023
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Masaki Koyama, Takashi Oda, Katsumi Morohoshi
  • Publication number: 20230142321
    Abstract: A vehicle bumper is provided integrally to include metal beam-extension portions on both right-and-left end sides of a metal bumper-beam portion. In this vehicle bumper, the bumper-beam portion and the beam-extension portion include a vertical wall portion, an upper wall portion and a lower wall portion, and a resin reinforcing rib is joined to inner surfaces of a void formed of each of the wall portions. In addition, in this vehicle bumper, an extension dimension of the upper wall portion and the lower wall portion of the beam-extension portion is larger than an extension dimension of the upper wall portion and the lower wall portion in the bumper-beam portion, the resin reinforcing rib in the beam-extension portion is joined to the vertical wall portion, the upper wall portion, and the lower wall portion of the beam-extension portion; and the stiffness of the bumper-beam portion is higher than the stiffness of the beam-extension portion.
    Type: Application
    Filed: February 17, 2020
    Publication date: May 11, 2023
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Shinichirou TAKEMOTO, Shinya MIHARA, Masaki KOYAMA
  • Publication number: 20220316549
    Abstract: A shock absorber is provided. The shock absorber of the present invention includes a shock absorber main body, a damping passage, a primary damping force generation component, and a secondary damping force generation component. The shock absorber main body has an outer tube and a rod and is stretchable. The damping passage communicates operating chambers with each other provided in the shock absorber main body. The primary and secondary damping force generation components are provided in series with the damping passage. The secondary damping force generation component includes a secondary valve, an annular facing portion, and a valve stopper. The annular facing portion faces the secondary valve with an annular gap between the annular facing portion and the secondary valve. The valve stopper has elasticity to allow bending, and when the secondary valve bends and comes in contact with the valve stopper, restricts the secondary valve from bending.
    Type: Application
    Filed: March 9, 2022
    Publication date: October 6, 2022
    Applicant: KYB CORPORATION
    Inventors: Takeshi YASUI, Masaki KOYAMA, Naoki YAMAMOTO
  • Publication number: 20220258391
    Abstract: The present invention provides a method for manufacturing a metal-resin composite including a metal plate and a thermoplastic resin that directly covers at least a part of one surface of the metal plate. As the method includes a support member placing step of fixing a resin support member for supporting the metal plate, in a mold, a metal plate placing step of placing the metal plate on the support member, and an integrating step of integrating the thermoplastic resin that is applied to a support member side of the metal plate, the support member, and the metal plate, into one body in the mold, the metal-resin composite that is unlikely to have a peeling start point of the thermoplastic resin is manufactured.
    Type: Application
    Filed: July 5, 2019
    Publication date: August 18, 2022
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Takashi ODA, Masaki KOYAMA
  • Patent number: 11411522
    Abstract: Controllability of a linear motor or a compressor is improved in a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: August 9, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Suzuki, Shuhei Nagata, Wataru Hatsuse, Masaki Koyama
  • Patent number: 11401924
    Abstract: Provided are a linear compressor and a linear compressor control system that do not require a sensor for detecting a position of a mover, and can compute a mover position with high accuracy, in consideration of position dependency of an induced voltage constant. A linear compressor 20 includes a field element 11 having a first end connected to elastic bodies (201a and 201b) and including a permanent magnet 111, an armature 12 having a winding 122 wound around a magnetic pole 121, and a linear motor 10 that causes the field element 11 and the armature 12 to reciprocate relatively in an axial direction.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: August 2, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Kaito Hotta, Wataru Hatsuse, Masaki Koyama, Tsutomu Ito, Yoshinori Kawai
  • Publication number: 20220234265
    Abstract: A molding mold for a composite body 1 for forming a composite body A that integrally molds a resin member R on one main surface of a metal panel P1, including at least a fixed mold 2 and a movable mold 3, and including, in a mold on the resin member side among the fixed mold 2 and the movable mold 3, a panel fixing mechanism 4 that fixes an edge portion of the metal panel P1 in a state in which the fixed mold 2 and the movable mold are open. The molding mold for a composite body 1 eliminates a movable body with respect to a molding space of the resin member R and overcomes the generation of burr in the resin member R, and forms an exposed metal portion B on the edge portion of the metal panel P1 on the resin member R side by the panel fixing mechanism 4.
    Type: Application
    Filed: May 24, 2019
    Publication date: July 28, 2022
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Masaki KOYAMA, Takashi ODA
  • Publication number: 20220209378
    Abstract: An all-solid-state battery includes an electrode assembly in which a solid electrolyte layer, a positive electrode layer, and a negative electrode layer are alternately stacked; a negative electrode terminal connected to the negative electrode layer; a positive electrode terminal connected to the positive electrode layer; and an insulator disposed to contact an end portion of the negative electrode layer in the first direction, and at least one of a negative electrode ion concentration portion and a negative electrode electric field concentration portion is disposed to be spaced apart from a negative electrode longitudinal end portion disposed on the same negative electrode reference surface.
    Type: Application
    Filed: September 27, 2021
    Publication date: June 30, 2022
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Masaki KOYAMA
  • Publication number: 20220194485
    Abstract: A vehicle body structure includes a body side section (1) configured of a first composite component (10) and a body lower section (2) configured of a second composite component (20). Each of the first and second composite components (10, 20) comprises a metal plate (11, 21) and a fiber reinforced thermoplastic portion (12, 22) that contains discontinuous fibers. The fiber reinforced thermoplastic portion (12) of the first composite component (10) includes a lining layer formed on the metal plate (11) and reinforcing ribs raised from the lining layer. The fiber reinforced thermoplastic portion (22) of the second composite component (20) includes a planar portion (24) infilled in an opening (23) opened on the metal plate 21. The discontinuous fibers in the fiber reinforced thermoplastic portion (22) of the second composite component (20) are longer than the discontinuous fibers in the fiber reinforced thermoplastic portion (12) of the first composite component (10).
    Type: Application
    Filed: January 18, 2019
    Publication date: June 23, 2022
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Takashi ODA, Shinichiro TAKEMOTO, Toshikazu TORIGAKI, Naoya MATSUOKA, Zhe JIANG, Masaki KOYAMA
  • Publication number: 20220166060
    Abstract: An all-solid-state battery includes an electrode assembly including a solid electrolyte layer, a first battery unit having a first negative electrode and a first positive electrode, and a second battery unit having a second negative electrode and a second positive electrode, in which the first negative and positive electrodes and the second negative and positive electrodes are respectively stacked with the solid electrolyte layer interposed therebetween. The all-solid-state battery further includes a first external electrode; a second external electrode; a third external electrode; and a fourth external electrode, in which the second battery unit is disposed to be adjacent to at least one the fifth surface or the sixth surface of the electrode assembly, and the first battery unit is located further inside than the second battery unit in the third direction.
    Type: Application
    Filed: September 21, 2021
    Publication date: May 26, 2022
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Masaki Koyama
  • Patent number: 11329541
    Abstract: Provided is a linear motor control apparatus capable of improving estimation accuracy of a resonance frequency immediately after start, and a compressor equipped with the linear motor control apparatus. A linear motor control apparatus includes a winding to which an AC voltage is applied and a mover which is connected to an elastic body, in which the linear motor control apparatus includes an operation mode (1) which monotonously increases amplitude of the AC voltage while keeping a frequency of the AC voltage substantially constant, and an operation mode (2) which changes the frequency of the AC voltage while keeping the amplitude of the AC voltage substantially constant, and executes the operation mode (1) and the operation mode (2) in this order.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: May 10, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Takahiro Suzuki, Shuhei Nagata, Wataru Hatsuse, Masaki Koyama
  • Patent number: 11211858
    Abstract: An object of the present invention is to provide a linear motor and a compressor which are effective against a non-fixed structure in which end portions of a resonant spring are not fixed and are capable of restraining loads in an up-down direction and a left-right direction which act on a slider. A linear motor includes a slider (2) which is driven in a first direction, a resonance spring (400) which is capable of vibrating in the first direction, and a permanent magnet (210) which is provided at the slider (2) and is magnetized in a second direction perpendicular to the first direction. The linear motor includes a bearing (480) that is movable against both forces of a force in the second direction and a force in a third direction perpendicular to the first direction and the second direction, and an elastic-body support member (450) which connects the resonant spring (400) and the bearing (480) to each other.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: December 28, 2021
    Assignees: HITACHI ASTEMO, LTD., HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Masaki Koyama, Shuhei Nagata, Naoyuki Oohata, Kan Kobayashi, Yoshinori Kawai
  • Patent number: 11171576
    Abstract: Provided are a power conversion device and a system using the same, which can reduce loss of each semiconductor element in a power conversion circuit and enable high efficiency of a device controlled by the power conversion device. The power conversion device includes a direct current (DC) power source; and a full-bridge circuit having first upper and lower arms having an upper element and a lower element and second upper and lower arms having an upper element and a lower element, in which the first upper and lower arms and the second upper and lower arms are electrically connectable to a device, and ON resistances of the upper element of the first upper and lower arms and the lower element of the second upper and lower arms are smaller than ON resistances of the lower element of the first upper and lower arms and the upper element of the second upper and lower arms.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 9, 2021
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Wataru Hatsuse, Masaki Koyama, Shuhei Nagata, Takahiro Suzuki
  • Patent number: 11079095
    Abstract: A lighting apparatus includes: a laser light source emitting laser light; a liquid crystal device that transmits the laser light from the laser light source and diffracts the laser light; a phosphor unit that receives laser light from the liquid crystal device, converts a wavelength of the laser light to emit illumination light, the phosphor unit including a first phosphor of a first color and a second phosphor of a second color differing from the first color. The liquid crystal device controls an angle of the laser light and selects one of the first phosphor or the second phosphor.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: August 3, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventor: Masaki Koyama
  • Patent number: 11054715
    Abstract: An optical deflection apparatus includes a deflection element and an incidence plane limiting unit limiting incidence of a laser beam on a range of an incidence plane. The deflection element including first and second panels, which including first and second repeating units. Each panel includes first and second substrates, a liquid crystal layer, an electrode for each repeating unit, and a common electrode. The electrodes of the first and second panel in a same repeating unit include first ends coinciding with each other, and second ends different from each other. The range is included in a range from the second end of the first electrode of the first panel in the first repeating unit to the second end of the first electrode of the second panel in the second repeating unit.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: July 6, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventor: Masaki Koyama