Patents by Inventor Ken Tamura

Ken 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: 11415078
    Abstract: In the present invention, a coal gasification combined power generation facility comprises: a feed water supply line (72); a condensate pump (39) and an intermediate-pressure feed water pump (40); a turbine bypass line (32) that bypasses a steam turbine and supplies steam to the condenser (73); and a spray water line (76) that supplies the feed water to the turbine bypass line (32). The coal gasification combined power generation facility has a normal operation mode and a bypass operation mode, and in the bypass operation mode, a control device (80) supplies the feed water to the turbine bypass line (32) and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in the normal operation mode.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: August 16, 2022
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Tomoya Hayashi, Jun Taguchi, Satoru Matsuo, Kei Moriyama, Ken Tamura, Kentaro Nakamura, Yuji Ohta
  • Publication number: 20220204537
    Abstract: There is provided a novel optically active bisphosphinomethane useful as a ligand for an asymmetric catalyst, excellent in oxidation resistance in air, and easy in handling. There is also provided a transition metal complex using the optically active bisphosphinoraethane having excellent asymmetric catalytic ability as a ligand. The optically active bisphosphinomethane is represented by the general formula (1), and the transition metal complex has the optically active bisphosphinomethane as a ligand. (In the formula, R1 represents an adamantyl group; R2 represents a branched alkyl group having 3 or more carbon atoms; and * represents an asymmetric center on a phosphorus atom.
    Type: Application
    Filed: June 9, 2020
    Publication date: June 30, 2022
    Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: Tsuneo Imamoto, Ken Tamura, Natsuhiro Sano
  • Publication number: 20220169667
    Abstract: A production method by which a biarylphosphine useful as a Buchwald phosphine ligand can be obtained in high purity is provided through an industrially advantageous process. The production method of a biarylphosphine comprises a step A of reacting a lithiated product obtained through lithiation of a halogenated benzene derivative with a benzene derivative to obtain a biphenyl derivative, and a step B of the reacting the biphenyl derivative with a halogenated phosphine. In the step A, the charge molar ratio of the halogenated benzene derivative to the benzene derivative is preferably 1.0 to 5.0.
    Type: Application
    Filed: March 30, 2020
    Publication date: June 2, 2022
    Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: Ken Tamura, Yuki Sawatsugawa, Natsuhiro Sano
  • Patent number: 11215204
    Abstract: A piston unit is provided with a piston body; a packing mounted on an outer circumferential portion of the piston body; a holding member having a plurality of magnet holding portions that are arranged along a circumferential direction; a plurality of magnets which are held at intervals in the circumferential direction; a first annular yoke disposed on one side in an axial direction of the plurality of magnets; and a second annular yoke disposed on the other side in the axial direction of the plurality of magnets.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: January 4, 2022
    Assignee: SMC CORPORATION
    Inventor: Ken Tamura
  • Publication number: 20210285396
    Abstract: A coal gasification combined power generation facility includes a feed water supply line that supplies feed water condensed by a condenser to an exhaust heat recovery boiler; a supply adjustment valve that adjusts the flow amount of feed water supplied to the exhaust heat recovery boiler; a turbine bypass line that bypasses a steam turbine and supplies steam to the condenser; and a spray water line that supplies the feed water to the turbine bypass line. The coal gasification combined power generation facility has a bypass operation mode, wherein a control device supplies the feed water to the turbine bypass line and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in a normal operation mode.
    Type: Application
    Filed: July 12, 2019
    Publication date: September 16, 2021
    Applicant: MITSUBISHI POWER, LTD.
    Inventors: Tomoya Hayashi, Jun Taguchi, Satoru Matsuo, Kei Moriyama, Ken Tamura, Kentaro Nakamura, Yuji Ohta
  • Publication number: 20210262572
    Abstract: A seal structure includes a mounting groove disposed in a first member and a packing unit housed in the mounting groove. The packing unit includes an inner circumferential mounting section and an outer circumferential sliding section. Both side surfaces of the packing unit are conical surfaces which are inclined such that their diameters gradually increase in a direction from the mounting section toward the sliding section and which are inclined in mutually opposite directions. The thickness of the packing unit increases in a gradual manner in the direction from the mounting section toward the sliding section, the thickness in the mounting section is the smallest, and the thickness in the sliding section is the largest.
    Type: Application
    Filed: June 6, 2019
    Publication date: August 26, 2021
    Applicant: SMC CORPORATION
    Inventors: Masayuki KUDO, Kenichi TAKEDA, Masahiko KAWAKAMI, Ken TAMURA, Tsukasa ODAKA
  • Patent number: 11085468
    Abstract: A hydraulic cylinder is provided with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body; packing mounted on the piston body; a holding member mounted on the piston body; and a magnet held by a magnet holding part of the holding member. The magnet holding part has a notch that is open on the outer circumferential surface of the holding member.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: August 10, 2021
    Assignee: SMC CORPORATION
    Inventor: Ken Tamura
  • Patent number: 11084835
    Abstract: Provided is a 2,3-bisphosphinopyrazine derivative represented by the following general formula (1), wherein R1, R2, R3, and R4 represent an optionally substituted straight-chain or branched alkyl group having 1 to 10 carbon atoms, an optionally substituted cycloalkyl group, an optionally substituted adamantyl group, or an optionally substituted phenyl group, R5 represents an optionally substituted alkyl group having 1 to 10 carbon atoms or an optionally substituted phenyl group, each R5 may be the same group or a different group, R6 represents a monovalent substituent, n denotes an integer of 0 to 2.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: August 10, 2021
    Assignees: NIPPON CHEMICAL INDUSTRIAL CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Hajime Ito, Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura, Natsuhiro Sano
  • Patent number: 11053265
    Abstract: An optically active 2,3-bisphosphinopyrazine derivative represented by the following general formula (1): wherein R1 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, an optionally substituted cycloalkyl group, and an optionally substituted aryl group; R2 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, and an optionally substituted cycloalkyl group, provided that when R1 is a tert-butyl group, R1 and R2 are not the same; R3 represents a monovalent substituent; n represents an integer of 0 to 4; and * represents an asymmetric center on a phosphorus atom.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 6, 2021
    Assignees: NIPPON CHEMICAL INDUSTRIAL CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Hajime Ito, Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura
  • Publication number: 20210171551
    Abstract: The silyl phosphine compound is represented by the following general formula (1). A content of a compound represented by the following general formula (2) is not more than 0.3 mol %. In the general formula (1), each R is independently an alkyl group having not less than 1 and not more than 5 carbon atoms or an aryl group having not less than 6 and not more than 10 carbon atoms. In the general formula (2), R is the same as in the general formula (1).
    Type: Application
    Filed: January 28, 2021
    Publication date: June 10, 2021
    Applicant: Nippon Chemical Industrial Co., Ltd.
    Inventors: Yosuke Takubo, Ken Tamura
  • Publication number: 20210155641
    Abstract: A method for producing a phosphinobenzene borane derivative comprises a reaction step (A) of obtaining liquid A containing a 1,2-dihalogenobenzene represented by the following general formula (1): obtaining liquid B containing a phosphine borane compound obtained by deprotonating a hydrogen-phosphine borane compound represented by the following general formula (2): and then adding the liquid B to the liquid A to be allowed to react to thereby obtain the phosphinobenzene borane derivative represented by the following general formula (3): According to the present invention, there can be provided the industrially advantageous method for producing the phosphinobenzene borane derivative.
    Type: Application
    Filed: May 20, 2019
    Publication date: May 27, 2021
    Applicant: Nippon Chemical Industrial Co., Ltd.
    Inventor: Ken Tamura
  • Publication number: 20210109282
    Abstract: An optical fiber bundle manufacturing apparatus includes: a winding member; a guide member movable in a direction parallel to a rotary axis, the guide member being configured to guide an optical fiber wire to any one of first winding positions, a converging winding position and second winding positions; and a processor configured to perform processing to move the guide member such that a first branching portion branching into p branches, a converging portion converging the first branching portion branching into p branches into one, a second branching portion branching into q branches, and a connecting portion connecting the first branching portion and the second branching portion are formed in this order by the optical fiber wire.
    Type: Application
    Filed: December 23, 2020
    Publication date: April 15, 2021
    Applicant: OLYMPUS CORPORATION
    Inventors: Hiroki TAKAGI, Ken TAMURA
  • Patent number: 10934316
    Abstract: The process for producing a silyl phosphine compound of the present invention comprises a first step of mixing a solvent having a relative dielectric constant of not more than 4, a basic compound, a silylating agent and phosphine to obtain a solution containing a silyl phosphine compound, a second step of removing the solvent from the solution containing a silyl phosphine compound to obtain a concentrated solution of a silyl phosphine compound, and a third step of distilling the concentrated solution of a silyl phosphine compound to obtain the silyl phosphine compound. The silyl phosphine compound of the present invention is a silyl phosphine compound represented by the following general formula (1), wherein a content of a compound represented by the following general formula (2) is not more than 0.5 mol %. (For explanatory notes of the formulas, see the specification.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: March 2, 2021
    Assignee: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: Yosuke Takubo, Ken Tamura
  • Patent number: 10927860
    Abstract: A fluidic cylinder has a cylinder tube having a cylinder chamber defined in an interior thereof has a pair of cover members attached to respective ends of the cylinder tube. A piston is disposed displaceably along the cylinder chamber, and a piston rod is connected to the piston. The piston and the cylinder tube are formed with rectangular shapes in cross section, the piston includes a wear ring which is in sliding contact with an inner wall surface of the cylinder tube, and a magnet is incorporated in the wear ring. At least one of the cover members includes bolt holes therein, the bolt holes extending in at least two or more directions including a direction in which the piston is displaced, and fastening bolts are selectively inserted into the bolt holes to fix the at least one of the cover members with respect to another member.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: February 23, 2021
    Assignee: SMC CORPORATION
    Inventors: Masayuki Kudo, Shinichiro Nemoto, Masahiko Kawakami, Yuu Mizutani, Eiko Miyasato, Ken Tamura
  • Publication number: 20210047351
    Abstract: Provided is a 2,3-bisphosphinopyrazine derivative represented by the following general formula (1), wherein R1, R2, R3, and R4 represent an optionally substituted straight-chain or branched alkyl group having 1 to 10 carbon atoms, an optionally substituted cycloalkyl group, an optionally substituted adamantyl group, or an optionally substituted phenyl group, R5 represents an optionally substituted alkyl group having 1 to 10 carbon atoms or an optionally substituted phenyl group, each R5 may be the same group or a different group, R6 represents a monovalent substituent, n denotes an integer of 0 to
    Type: Application
    Filed: March 1, 2019
    Publication date: February 18, 2021
    Applicants: Nippon Chemical Industrial Co., Ltd., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Hajime Ito, Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura, Natsuhiro Sano
  • Publication number: 20210002548
    Abstract: The silyl phosphine compound of the present invention is represented by the formula (1) and has an arsenic content of not more than 1 ppm. The process for producing a silyl phosphine compound of the present invention is a process comprising mixing a basic compound, a silylating agent and phosphine to obtain a solution containing a silyl phosphine compound, removing a solvent from the solution to obtain a concentrated solution of a silyl phosphine compound, and distilling the concentrated solution, wherein an arsenic content in the phosphine is adjusted to not more than 1 ppm by volume in terms of arsine. The process for producing InP quantum dots of the present invention uses, as a phosphorus source, a silyl phosphine compound represented by the formula (1) and having an arsenic content of not more than 1 ppm by mass. (For definition of R, see the specification.
    Type: Application
    Filed: March 20, 2019
    Publication date: January 7, 2021
    Applicant: Nippon Chemical Industrial Co., Ltd.
    Inventors: Yosuke Takubo, Ken Tamura, Kazuhiro Nakatsui
  • Publication number: 20210003152
    Abstract: A packing has an outer circumferential surface and includes a pair of sealing parts located at opposite ends of the packing in a direction along an axis. A piston has a sliding face having a first recess groove. When in the first recess groove, the packing has an outside diameter smaller than the diameter of a slide-receiving face of a cylinder hole. The piston divides the cylinder hole into a pair of chambers. While a compressed fluid is supplied to either one of the chambers, a side edge of the packing adjacent to the chamber at a high pressure is stretched in a radial direction by elastic deformation due to the pressure of the compressed fluid, thus causing a sealing part adjacent to the chamber at the high pressure to reduce a gap formed with the slide-receiving face of the cylinder hole or come into contact with the slide-receiving face.
    Type: Application
    Filed: February 20, 2019
    Publication date: January 7, 2021
    Applicant: SMC CORPORATION
    Inventors: Masayuki KUDO, Kenichi TAKEDA, Masahiko KAWAKAMI, Ken TAMURA, Tsukasa ODAKA
  • Publication number: 20200377536
    Abstract: An optically active 2,3-bisphosphinopyrazine derivative represented by the following general formula (1): wherein R1 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, an optionally substituted cycloalkyl group, and an optionally substituted aryl group; R2 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, and an optionally substituted cycloalkyl group, provided that when R1 is a tert-butyl group, R1 and R2 are not the same; R3 represents a monovalent substituent; n represents an integer of 0 to 4; and * represents an asymmetric center on a phosphorus atom.
    Type: Application
    Filed: September 28, 2018
    Publication date: December 3, 2020
    Applicants: Nippon Chemical Industrial Co., Ltd., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Hajime Ito, Hiroaki Iwamoto, Tsuneo Imamoto, Ken Tamura
  • Publication number: 20200300276
    Abstract: A hydraulic cylinder is provided with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body; packing mounted on the piston body; a holding member mounted on the piston body; and a magnet held by a magnet holding part of the holding member. The magnet holding part has a notch that is open on the outer circumferential surface of the holding member.
    Type: Application
    Filed: July 6, 2018
    Publication date: September 24, 2020
    Applicant: SMC CORPORATION
    Inventor: Ken TAMURA
  • Patent number: 10767671
    Abstract: A shaft coupling structure includes a stopper member attached to a piston rod so as to be relatively rotatable and has a plurality of engagement projections and a plurality of slot grooves. The plurality of engagement projections are inserted into the slot grooves, respectively, and include a plurality of inlet grooves and a plurality of inclined engagement grooves extending in a direction inclined from the circumferential direction. The piston rod and a piston member are coupled together through the stopper member so as to be relatively unmovable in the axial direction.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: September 8, 2020
    Assignee: SMC CORPORATION
    Inventor: Ken Tamura