Patents by Inventor Masashi Yamashita

Masashi Yamashita 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: 20240352217
    Abstract: A method of collecting a fibrous filling material and ?-caprolactam includes adding a polyamide 6 resin composition (A) containing at least a fibrous filling material (D) and at least one of water (B) heated to 290° C. or higher and 350° C. or lower and a polyamide 6 oligomer aqueous solution (B1) heated to 290° C. or higher and 350° C. or lower to make contact with each other to obtain a mixture (C) containing at least the fibrous filling material (D), ?-caprolactam, a polyamide 6 oligomer, and the water (B), and collecting the fibrous filling material (D) and the ?-caprolactam from the mixture (C).
    Type: Application
    Filed: October 17, 2022
    Publication date: October 24, 2024
    Applicant: Toray Industries, Inc.
    Inventors: Kohei Yamashita, Akihiro Takahashi, Masashi Kato, Mihoko Nishimura, Koya Kato
  • Publication number: 20240346015
    Abstract: A system using blockchain technology includes a plurality of nodes forming a network having a hierarchical structure and each managing a ledger. Each of the plurality of nodes is located, based on a performance of a corresponding one of the plurality of nodes, in a layer corresponding to the performance among a plurality of layers in the hierarchical structure.
    Type: Application
    Filed: June 26, 2024
    Publication date: October 17, 2024
    Applicant: KYOCERA Corporation
    Inventors: Yoshihiro TAKAHASHI, Hiroyuki YAMASHITA, Satoko ISHIHARA, Haeseung JUNG, Hideo NISHIUCHI, Masashi FUJISAWA
  • Patent number: 12109333
    Abstract: Provided is a biodegradable stent comprising a magnesium alloy free of a rare earth element and aluminum. The stent comprises: a core structure comprising a magnesium alloy containing 90 wt % or more of magnesium as a main component, and zinc, zirconium, and manganese as accessary components, the magnesium alloy being free of a rare earth element and aluminum; a first corrosion resistant layer formed on the core structure and containing magnesium fluoride as a main component; and a second corrosion resistant layer formed on the first corrosion resistant layer and comprising a parylene. A method for producing such a bioabsorbable stent is also provided.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: October 8, 2024
    Assignees: Japan Medical Device Technology Co., LTD., FUJI LIGHT METAL CO., LTD.
    Inventors: Makoto Sasaki, Yuki Koga, Yuki Okazawa, Hironori Ueda, Masashi Inoue, Shuzo Yamashita
  • Publication number: 20240319629
    Abstract: In a two-component developer, external additive particles of toner particles include resin particles. The resin particles contain a crosslinked resin including a repeating unit derived from a crosslinking agent. Carrier particles each include a carrier core and a coat layer covering a surface of the carrier core. The coat layers contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter within a range of 100 nm to 500 nm. The barium titanate particles have a content within a range of 5 parts by mass to 45 parts by mass relative to 100 parts by mass of the coating resin. A rate of a mass of the coat layers to a mass of the carrier cores is greater than 0.0% by mass and no greater than 4.9% by mass. The carrier cores have a shape factor within a range of 34.0% to 85.0%.
    Type: Application
    Filed: March 31, 2022
    Publication date: September 26, 2024
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Tamotsu SHIMIZU, Kohei TERASAKI, Yusuke KURANO, Masashi YAMASHITA, Eriko TAKEUCHI
  • Publication number: 20240309967
    Abstract: A valve device 11 comprising: a valve main body 12 having a valve chamber 13 in an interior thereof; a valve body 21 that has flow path space 22 in an interior thereof and that is rotationally driven in the valve chamber and changes a flow quantity of a fluid; a first flow path hole 14 that is formed in the valve main body and that communicates with the flow path space and allows the passage of the fluid; a second flow path hole 15 that is formed in the valve main body, whose communication state with the flow path space is changed via the rotational displacement position of the valve body, and that allows the passage of the fluid when communicating with the flow path space; and a transmission mechanism including a valve body driving shaft 31 that transmits, to the valve body, driving force for rotating the valve body. The rotation axis of the valve body and the rotation axis of the valve body driving shaft are orthogonal with each other.
    Type: Application
    Filed: May 18, 2022
    Publication date: September 19, 2024
    Inventors: Takeshi KANNOO, Takao HARADA, Masashi YAMASHITA, Junya HAYAKAWA
  • Patent number: 12072476
    Abstract: An optical system (LS) includes lenses (L22,L23) satisfying the following conditional expressions, ?dLZ<35.0, and 0.702<?gFLZ+(0.00316×?dLZ), where ?dLZ: Abbe number of the lens with reference to d-line, and ?gFLZ: a partial dispersion ratio of the lens, wherein ?gFLZ is defined by the following expression, ?gFLZ=(ngLZ?nFLZ)/(nFLZ?nCLZ). wherein a refractive index of the lens with reference to g-line is ngLZ, a refractive index of the lens with reference to F-line is nFLZ, and a refractive index of the lens with reference to C-line is nCLZ.
    Type: Grant
    Filed: April 10, 2023
    Date of Patent: August 27, 2024
    Assignee: Nikon Corporation
    Inventors: Masashi Yamashita, Tomoki Ito, Hiroshi Yabumoto, Hiroshi Yamamoto, Satoshi Miwa, Keisuke Tsubonoya, Ayumu Makida, Takeru Uehara
  • Publication number: 20240269839
    Abstract: A power assist system according to the present disclosure includes: a robot that is worn by a user, the robot including a drive source that assists action of the user; an interference force estimation unit that estimates an interference force given from the user to the robot; an admittance model that generates a target velocity in a virtual object having a predetermined dynamic characteristic, the target velocity corresponding to the interference force estimated by the interference force estimation unit; and a control unit, in which the interference force estimation unit includes: a disturbance observer that detects a disturbance based on the momentum of the robot; and an estimation unit that estimates the interference force depending on the disturbance detected by the disturbance observer, using an ESN learning model for which learning about the interference force depending on the disturbance is performed while weights in a reservoir layer are stochastically assigned.
    Type: Application
    Filed: December 19, 2023
    Publication date: August 15, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA SCHOOL FOUNDATION
    Inventors: Masashi YAMASHITA, Yuhei YAMAGUCHI, Hitoshi YAMADA, Tatsuo NARIKIYO
  • Patent number: 12061324
    Abstract: An optical system (LS) has an aperture stop (S), and a negative lens (L73) disposed closer to the image side than the aperture stop (S) and satisfying the following conditional expressions. ?0.010<ndN2?(2.015?0.0068×?dN2), 50.00<?dN2<65.00, 0.545<?gFN2, ?0.010<?gFN2?(0.6418?0.00168×?dN2) where ndN2 is the refractive index to the d line of the negative lens, ?dN2 is the Abbe number with respect to the d line of the negative lens, and ?gFN2 is the partial dispersion ratio of the negative lens.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: August 13, 2024
    Assignee: Nikon Corporation
    Inventors: Masashi Yamashita, Tomoki Ito, Tomonori Kuribayashi, Keigo Koida, Satoshi Miwa, Yoko Komatsubara, Katsuya Watanabe, Azuna Nonaka, Ayumu Makida
  • Patent number: 12036711
    Abstract: A plasticization device that plasticizes a material, includes: a drive motor; a rotor that is to be rotated by the drive motor and has a groove-forming surface in which a curved projection strip portion is formed from a peripheral edge of a circular central portion toward an outer periphery of the rotor; a barrel that faces the groove-forming surface and includes a communication hole at a position facing the central portion of the groove-forming surface; and a heating unit that heats the material supplied between the rotor and the barrel, the rotor includes a protrusion protruding from the central portion toward the communication hole, and 0.28?S2/S1?1.03??(1), wherein S1 is an area of the central portion and S2 is a maximum area of a cross section of the protrusion along the groove-forming surface.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: July 16, 2024
    Assignee: Seiko Epson Corporation
    Inventors: Riona Hayashi, Seiichiro Yamashita, Kenta Anegawa, Megumi Enari, Masashi Fuchii
  • Publication number: 20240184227
    Abstract: In a two-component developer, toner particles include toner mother particles and external additive particles including strontium titanate particles. A first percentage content being a percentage content of the strontium titanate particles to the mass of the toner mother particles is 0.30-0.90% by mass. The carrier particles include carrier cores and coat layers. The coat layers contain barium titanate particles and a coating resin including a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. A second percentage content being a percentage content of the coat layers to the mass of the carrier cores is 2.0-4.0% by mass. A third percentage content being a percentage content of the barium titanate to the mass of the coating resin satisfies formula (1) “(X×10)?Z?45.0”. In formula (1), X represents the first percentage content and Z represents the third percentage content.
    Type: Application
    Filed: March 31, 2022
    Publication date: June 6, 2024
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Kohei TERASAKI, Tamotsu SHIMIZU, Yusuke KURANO, Masashi YAMASHITA, Yuma UCHIHASHI
  • Publication number: 20240151952
    Abstract: A variable magnification optical system has, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; an aperture stop; a third lens group having positive refractive power; and a rear lens group. Upon zooming from a wide-angle end state to a telephoto end state, at least the rear lens group is moved toward the object side, and distances between the lens groups are varied. Upon focusing from an infinitely distant object to a closely distant object, the third lens group is moved along the optical axis. At least a portion of the rear lens group constitutes a vibration reduction lens group having negative refractive power and moveable perpendicular to the optical axis. An optical apparatus and a method of manufacture are also provided.
    Type: Application
    Filed: January 15, 2024
    Publication date: May 9, 2024
    Inventors: Akihiko OBAMA, Masashi YAMASHITA
  • Patent number: 11971540
    Abstract: An optical system (LS) includes lenses (L22,L23) satisfying the following conditional expressions, ndLZ+(0.01425×?dLZ)<2.12, and ?dLZ<35.0, where ndLZ: a refractive index of the lens with reference to d-line, and ?dLZ: Abbe number of the lens with reference to d-line.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: April 30, 2024
    Assignee: Nikon Corporation
    Inventors: Masashi Yamashita, Tomoki Ito, Hiroshi Yabumoto, Hiroshi Yamamoto, Satoshi Miwa, Keisuke Tsubonoya, Ayumu Makida, Takeru Uehara
  • Patent number: 11892610
    Abstract: A variable magnification optical system has, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; an aperture stop; a third lens group having positive refractive power; and a rear lens group. Upon zooming from a wide-angle end state to a telephoto end state, at least the rear lens group is moved toward the object side, and distances between the lens groups are varied. Upon focusing from an infinitely distant object to a closely distant object, the third lens group is moved along the optical axis. At least a portion of the rear lens group constitutes a vibration reduction lens group having negative refractive power and moveable perpendicular to the optical axis. An optical apparatus and a method of manufacture are also provided.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: February 6, 2024
    Assignee: Nikon Corporation
    Inventors: Akihiko Obama, Masashi Yamashita
  • Publication number: 20230418035
    Abstract: A compact zooming optical system, an optical apparatus and a method for manufacturing the zooming optical system having a vibration reduction function, a high zooming ratio, a wide-angle view and superb optical performance are provided, the system including, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having negative refractive power; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2, a distance between the second lens group G2 and the third lens group G3 and a distance between the third lens group G3 and the fourth lens group G4 being respectively varied; the third lens group G3 having, in order from the object side, a first segment group G31 having positive refractive power and a second segment group G32; the second segment group G32 being m
    Type: Application
    Filed: September 5, 2023
    Publication date: December 28, 2023
    Inventor: Masashi YAMASHITA
  • Publication number: 20230399501
    Abstract: The thermoplastic elastomer composition contains a thermoplastic elastomer and a pigment.
    Type: Application
    Filed: August 28, 2023
    Publication date: December 14, 2023
    Applicant: SEKISUI PLASTICS CO., LTD.
    Inventors: Yuichi GONDOH, Hirotaka KONDO, Masashi YAMASHITA, Masayuki TAKANO
  • Patent number: 11835921
    Abstract: A carrier includes carrier particles. Each of the carrier particles includes a carrier core and a coating layer covering the surface of the carrier core. The coating layer contains a silicone resin and conductive particles. Each of the conductive particles includes a transparent conductive substrate composed of a transparent conductive material and a film covering a surface of the transparent conductive substrate. The film contains silica.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: December 5, 2023
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masashi Yamashita
  • Patent number: 11782250
    Abstract: A compact zooming optical system, an optical apparatus and a method for manufacturing the zooming optical system having a vibration reduction function, a high zooming ratio, a wide-angle view and superb optical performance are provided, the system including, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having negative refractive power; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2, a distance between the second lens group G2 and the third lens group G3 and a distance between the third lens group G3 and the fourth lens group G4 being respectively varied; the third lens group G3 having, in order from the object side, a first segment group G31 having positive refractive power and a second segment group G32; the second segment group G32 being m
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: October 10, 2023
    Assignee: Nikon Corporation
    Inventor: Masashi Yamashita
  • Patent number: 11754195
    Abstract: A flow channel switching valve includes a valve stem that is attached to a ball valve member. The flow channel switching valve includes a potentiometer shaft that is press-fitted into an attachment hole provided in an end surface of the valve stem, and a potentiometer that detects a rotation angle of the potentiometer shaft around an axis. The potentiometer shaft has a small-diameter portion, a medium-diameter portion, and a large-diameter portion that are sequentially connected in a direction of the axis, and is supported rotatably around the axis in the attachment hole in an inserted state before being press-fitted into the attachment hole. The large-diameter portion is press-fitted into an upper end portion of the attachment hole.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: September 12, 2023
    Assignees: FUJIKOKI CORPORATION, DENSO CORPORATION
    Inventors: Daisuke Kondo, Kenichi Mochizuki, Masashi Yamashita, Takamitsu Mano
  • Publication number: 20230258914
    Abstract: This optical system (OL) has a first lens group (G1) having positive refractory power, a second lens group (G2), a third lens group (G3), and a fourth lens group (G4) which are aligned in order from an object side along an optical axis, wherein when focused from an infinity object to a short-distance object, the second lens group (G2) and the third lens group (G3) move in mutually different trajectories along the optical axis, and the second lens group (G2) and the third lens group (G3) are composed of three or less lenses in total.
    Type: Application
    Filed: April 12, 2021
    Publication date: August 17, 2023
    Inventors: Masashi YAMASHITA, Akino KONDO
  • Publication number: 20230244066
    Abstract: An optical system (LS) includes lenses (L22,L23) satisfying the following conditional expressions, ?dLZ<35.0, and 0.702<?gFLZ+(0.00316×?dLZ), where ?dLZ: Abbe number of the lens with reference to d-line, and ?gFLZ: a partial dispersion ratio of the lens, wherein ?gFLZ is defined by the following expression, ?gFLZ=(ngLZ?nFLZ)/(nFLZ?nCLZ). wherein a refractive index of the lens with reference to g-line is ngLZ, a refractive index of the lens with reference to F-line is nFLZ, and a refractive index of the lens with reference to C-line is nCLZ.
    Type: Application
    Filed: April 10, 2023
    Publication date: August 3, 2023
    Inventors: Masashi YAMASHITA, Tomoki ITO, Hiroshi YABUMOTO, Hiroshi YAMAMOTO, Satoshi MIWA, Keisuke TSUBONOYA, Ayumu MAKIDA, Takeru UEHARA