Patents by Inventor Kohei Doi

Kohei Doi 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: 12287023
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring housed in a spring chamber formed on the first fixed iron core side of the first movable iron core and biasing the first movable iron core to the second fixed iron core side, a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core, and a throttle passage that causes the spring chamber to communicate with outside.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: April 29, 2025
    Assignee: KYB CORPORATION
    Inventors: Yoshifumi Kobayashi, Tomoyasu Abe, Yuusuke Furuta, Naoaki Danshita, Kohei Doi, Masatoshi Iyatani
  • Patent number: 12196288
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring that biases the first movable iron core to the second fixed iron core side, a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core, and a communication passage that causes the first fixed iron core side of the second movable iron core to communicate with the second fixed iron core side.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: January 14, 2025
    Assignee: KYB Corporation
    Inventors: Yoshifumi Kobayashi, Tomoyasu Abe, Yuusuke Furuta, Naoaki Danshita, Kohei Doi, Masatoshi Iyatani
  • Publication number: 20240355853
    Abstract: Provided is a photodetection device that is able to achieve both suppression of optical color mixing at normal pixels and an enhancement in the sensitivity ratio of phase difference pixels. The photodetection device includes individual-type microlenses each formed for a separate one of photoelectric conversion parts included in the normal pixels, and shared-type microlenses each formed for a separate one of photoelectric conversion part groups each including photoelectric conversion parts included in adjacent ones of the phase difference pixels. The photodetection device also includes first pixel separating portions arranged between at least some of the photoelectric conversion parts in each photoelectric conversion part group, and second pixel separating portions arranged between the photoelectric conversion parts where none of the first pixel separating portions is arranged.
    Type: Application
    Filed: March 11, 2022
    Publication date: October 24, 2024
    Inventor: KOHEI DOI
  • Patent number: 12106900
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on one axial end side and the other axial end side of a coil, a first movable member and a second movable member located between those fixed iron cores and configured to be attracted to the first fixed iron core and the second fixed iron core, respectively, by energization of the coil, a spring configured to bias the first movable member toward the second fixed iron core, and a first regulating portion made from a non-magnetic material, provided integrally with the first movable member or the second movable member, and configured to regulate movement of the first movable member toward the second fixed iron core with respect to the second movable member.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: October 1, 2024
    Assignee: KYB Corporation
    Inventors: Yoshifumi Kobayashi, Tomoyasu Abe, Yuusuke Furuta, Naoaki Danshita, Kohei Doi, Masatoshi Iyatani
  • Patent number: 11846366
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring that biases the first movable iron core to the second fixed iron core side, and a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core. The movement of the first movable iron core in a direction orthogonal to the axial direction of the coil with respect to the first fixed iron core and the second fixed iron core is regulated.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: December 19, 2023
    Assignee: KYB CORPORATION
    Inventors: Yoshifumi Kobayashi, Tomoyasu Abe, Yuusuke Furuta, Naoaki Danshita, Kohei Doi, Masatoshi Iyatani
  • Publication number: 20230282405
    Abstract: A solenoid includes: a coil; a first fixed iron core disposed on an axial first-end side of the coil; a second fixed iron core disposed on an axial second-end side of the coil with a gap from the first fixed iron core; a tubular first movable iron core disposed between the first fixed iron core and the second fixed iron core: a second movable iron core having a tubular shape with a bottom, slidably inserted into the first movable iron core, disposed between the first fixed iron core and the second fixed iron core with a bottom portion facing the second fixed iron core; and a spring interposed between the first movable iron core and the first fixed iron core, and pressing the first movable iron core to the second fixed iron core side.
    Type: Application
    Filed: August 17, 2021
    Publication date: September 7, 2023
    Applicant: KYB Corporation
    Inventors: Yoshifumi KOBAYASHI, Tomoyasu ABE, Toshihiro MORI, Naoaki DANSHITA, Masatoshi IYATANI, Kohei DOI
  • Patent number: 11721464
    Abstract: To provide a solenoid, a solenoid valve, and a damper in which when the amount of current supplied to the solenoid is small, the thrust of the solenoid to bias an object in one direction can be made small, and at the same time, even when the solenoid is not energized, the object can be biased in the same direction as that of the thrust. The solenoid includes a coil, a first movable iron core and a second movable iron core that are attracted in a direction away from each other by energizing the coil, a coil spring that biases the first movable iron core toward the second movable iron core, and a leaf spring that restricts the approach of the first movable iron core and the second movable iron core.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: August 8, 2023
    Assignees: KYB Corporation, TAKAKO INDUSTRIES, INC.
    Inventors: Ryosuke Kamakura, Naoaki Danshita, Kohei Doi
  • Patent number: 11565238
    Abstract: Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, and having a weak adhesive strength in a direction vertical to the surface. Also provided is a method of producing such adsorption temporary fixing sheet. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 20 hours at each of such different temperatures as ?40° C., 23° C., or 125° C. is represented by V1 (N/1 cm?), V2 (N/1 cm?), or V3 (N/1 cm?) and when a silicon chip shearing adhesive strength of the surface of the foam layer after 20 hours at each of the different temperatures (?40° C., 23° C., or 125° C.) is represented by H1 (N/1 cm?), H2 (N/1 cm?), or H3 (N/1 cm?), relationships of V1<H1, V2<H2, and V3<H3 are satisfied.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: January 31, 2023
    Assignee: NITTO DENKO CORPORATION
    Inventors: Toru Iseki, Kohei Doi, Mitsuhiro Kanada, Kazumichi Kato, Hideyuki Tokuyama
  • Publication number: 20220252127
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring housed in a spring chamber formed on the first fixed iron core side of the first movable iron core and biasing the first movable iron core to the second fixed iron core side, a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core, and a throttle passage that causes the spring chamber to communicate with outside.
    Type: Application
    Filed: September 2, 2020
    Publication date: August 11, 2022
    Applicant: KYB CORPORATION
    Inventors: Yoshifumi KOBAYASHI, Tomoyasu ABE, Yuusuke FURUTA, Naoaki DANSHITA, Kohei DOI, Masatoshi IYATANI
  • Publication number: 20220252128
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring that biases the first movable iron core to the second fixed iron core side, a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core, and a communication passage that causes the first fixed iron core side of the second movable iron core to communicate with the second fixed iron core side.
    Type: Application
    Filed: September 2, 2020
    Publication date: August 11, 2022
    Applicant: KYB CORPORATION
    Inventors: Yoshifumi KOBAYASHI, Tomoyasu ABE, Yuusuke FURUTA, Naoaki DANSHITA, Kohei DOI, Masatoshi IYATANI
  • Publication number: 20220254555
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on one axial end side and the other axial end side of a coil, a first movable member and a second movable member located between those fixed iron cores and configured to be attracted to the first fixed iron core and the second fixed iron core, respectively, by energization of the coil, a spring configured to bias the first movable member toward the second fixed iron core, and a first regulating portion made from a non-magnetic material, provided integrally with the first movable member or the second movable member, and configured to regulate movement of the first movable member toward the second fixed iron core with respect to the second movable member.
    Type: Application
    Filed: September 2, 2020
    Publication date: August 11, 2022
    Applicant: KYB CORPORATION
    Inventors: Yoshifumi KOBAYASHI, Tomoyasu ABE, Yuusuke FURUTA, Naoaki DANSHITA, Kohei DOI, Masatoshi IYATANI
  • Publication number: 20220243839
    Abstract: A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring that biases the first movable iron core to the second fixed iron core side, and a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core. The movement of the first movable iron core in a direction orthogonal to the axial direction of the coil with respect to the first fixed iron core and the second fixed iron core is regulated.
    Type: Application
    Filed: September 2, 2020
    Publication date: August 4, 2022
    Applicant: KYB CORPORATION
    Inventors: Yoshifumi KOBAYASHI, Tomoyasu ABE, Yuusuke FURUTA, Naoaki DANSHITA, Kohei DOI, Masatoshi IYATANI
  • Publication number: 20210012939
    Abstract: To provide a solenoid, a solenoid valve, and a damper in which when the amount of current supplied to the solenoid is small, the thrust of the solenoid to bias an object in one direction can be made small, and at the same time, even when the solenoid is not energized, the object can be biased in the same direction as that of the thrust. The solenoid includes a coil, a first movable iron core and a second movable iron core that are attracted in a direction away from each other by energizing the coil, a coil spring that biases the first movable iron core toward the second movable iron core, and a leaf spring that restricts the approach of the first movable iron core and the second movable iron core.
    Type: Application
    Filed: March 6, 2019
    Publication date: January 14, 2021
    Applicants: KYB CORPORATION, TAKAKO INDUSTRIES, INC.
    Inventors: Ryosuke KAMAKURA, Naoaki DANSHITA, Kohei DOI
  • Patent number: 10883018
    Abstract: An adsorption temporary fixing material comprises an adsorption temporary fixing sheet including a foam layer having an open-cell structure, wherein the adsorption temporary fixing material includes the foam layer in the entirety of the sheet or on at least one surface thereof, wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23° C. is 1 N/100 mm2 or more at a tensile rate of 50 mm/min, wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23° C. is 1 N/20 mm or less at a peel angle of 180° and a tensile rate of 300 mm/min, and wherein a weight change ratio after the adsorption temporary fixing sheet has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 5, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventor: Kohei Doi
  • Patent number: 10857758
    Abstract: Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 ?m to 3,000 ?m, wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 ?m to 50 ?m, and 90% or more of all cells therein each has a cell diameter of 80 ?m or less.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: December 8, 2020
    Assignees: NITTO DENKO CORPORATION, DOW TORAY CO., LTD.
    Inventors: Kohei Doi, Toru Iseki, Akihiro Nakamura, Syuji Endo
  • Patent number: 10836935
    Abstract: An adsorption temporary fixing material comprises an adsorption temporary fixing sheet including a foam layer having an open-cell structure, wherein the adsorption temporary fixing material includes the foam layer in the entirety of the sheet or on at least one surface thereof, wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23° C. is 1 N/100 mm2 or more at a tensile rate of 50 mm/min, wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23° C. is 1 N/20 mm or less at a peel angle of 180° and a tensile rate of 300 mm/min, and wherein a weight change ratio after the adsorption temporary fixing sheet has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: November 17, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventor: Kohei Doi
  • Patent number: 10731255
    Abstract: A film forming method comprises loading a substrate on a rotary table, forming an adsorption region for adsorbing a raw material gas to the substrate by discharging the raw material gas from multiple discharge ports, forming a reaction region, to which a reaction gas is supplied, at a position spaced from the adsorption region, separating an atmosphere of the adsorption region and an atmosphere of the reaction region by exhausting and by supplying a purge gas, forming a film by performing a cycle a plurality of times to deposit the reaction product on the substrate, the cycle comprising passing the substrate through the adsorption region and the reaction region and setting a combination of flow rates of the raw material gas for a first pattern in order to perform the cycle with the first pattern and for a second pattern in order to perform the cycle with the second pattern.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: August 4, 2020
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Manabu Honma, Yuka Nakasato, Kohei Doi
  • Publication number: 20200030772
    Abstract: Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, and having a weak adhesive strength in a direction vertical to the surface. Also provided is a method of producing such adsorption temporary fixing sheet. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 20 hours at each of such different temperatures as ?40° C., 23° C., or 125° C. is represented by V1 (N/1 cm?), V2 (N/1 cm?), or V3 (N/1 cm?) and when a silicon chip shearing adhesive strength of the surface of the foam layer after 20 hours at each of the different temperatures (?40° C., 23° C., or 125° C.) is represented by H1 (N/1 cm?), H2 (N/1 cm?), or H3 (N/1 cm?), relationships of V1<H1, V2<H2, and V3<H3 are satisfied.
    Type: Application
    Filed: January 22, 2018
    Publication date: January 30, 2020
    Inventors: Toru ISEKI, Kohei DOI, Mitsuhiro KANADA, Kazumichi KATO, Hideyuki TOKUYAMA
  • Patent number: 10316156
    Abstract: There is provided a foamed sheet which takes only a short time to recover the thickness thereof after being compressed, and even if being subjected to repeated impacts, hardly decreases in the impact absorption. The foamed sheet according to the present invention comprises a foamed body formed of a resin composition comprising: a thermoplastic resin a and a silicone-based compound b having not more than 2,000 siloxane bonds; and/or a thermoplastic resin a? having a silicone chain having not more than 2,000 siloxane bonds. The thermoplastic resin a is preferably at least one selected from the group consisting of acrylic polymers, rubbers, urethanic polymers and ethylene-vinyl acetate copolymers. The silicone-based compound b is preferably at least one selected from the group consisting of silicone oils, modified silicone oils and silicone resins.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: June 11, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kazumichi Kato, Hideyuki Tokuyama, Tadao Takahashi
  • Publication number: 20190106602
    Abstract: An adsorption temporary fixing material comprises an adsorption temporary fixing sheet including a foam layer having an open-cell structure, wherein the adsorption temporary fixing material includes the foam layer in the entirety of the sheet or on at least one surface thereof, wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23° C. is 1 N/100 mm2 or more at a tensile rate of 50 mm/min, wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23° C. is 1 N/20 mm or less at a peel angle of 180° and a tensile rate of 300 mm/min, and wherein a weight change ratio after the adsorption temporary fixing sheet has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less.
    Type: Application
    Filed: February 27, 2017
    Publication date: April 11, 2019
    Inventor: Kohei DOI