Patents by Inventor Shoji Tomida

Shoji Tomida 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: 12247959
    Abstract: A flowpath switch valve is configured for extended service life by spreading the region, of the sliding surfaces of a stator and a rotor, that is subject to wear over the entirety of the sliding surfaces. The stator has fixed stator flowpaths, and the rotor has rotor flowpaths. A flowpath switch valve, depending on the rotor rotation state, realizes connection patterns that include: a first connection pattern wherein a rotor flowpath 241 connects a fixed stator flowpath 31 and a fixed stator flowpath 32; a second connection pattern wherein the rotor flowpath 241 connects the fixed stator flowpath 31 and a fixed stator flowpath 36; a third connection pattern wherein a rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 32; and a fourth connection pattern wherein the rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 36.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: March 11, 2025
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Ayano Otsubo, Nobuhiro Tsukada, Hisao Inami, Shoji Tomida, Mitsuhiko Ueda, Daisuke Akieda, Kenichiro Nishiki
  • Publication number: 20240210364
    Abstract: To provide a liquid chromatograph and a liquid delivery method capable of more easily and reliably removing bubbles mixed during mobile phase installation or replacement operation.
    Type: Application
    Filed: February 3, 2022
    Publication date: June 27, 2024
    Inventors: Daisuke AKIEDA, Yushi HARADA, Shoji TOMIDA, Shinya MATSUOKA, Yuichiro HASHIMOTO
  • Publication number: 20240201144
    Abstract: A liquid chromatography (LC) that can supply a mobile phase to a storage bottle and can prevent mixing of air bubbles into a flow path without stopping analysis and liquid feeding. The LC includes a liquid feeding device that feeds out a mobile phase, a sample injection portion that injects a sample into the mobile phase, a column that separates the sample carried by the mobile, and a detection device that detects the sample. The LC further comprises a storage bottle that stores the mobile phase fed by the liquid feeding device, a mobile phase supply bottle that supplies the mobile phase to the storage bottle, a mobile phase supply pump that supplies the mobile phase to the storage bottle, and a control unit that controls an operation of the mobile phase supply pump and determines an amount of the mobile phase to be supplied to the storage bottle.
    Type: Application
    Filed: February 21, 2022
    Publication date: June 20, 2024
    Inventors: Daisuke Akieda, Yushi Harada, Mitsuhiko Uedo, Shoji Tomida, Yuichiro Hashimoto
  • Publication number: 20240060941
    Abstract: A technique for replacing a separation column includes: a driving device supporting a first pipe along a first direction; a fixing member that fixes a second pipe to be opposed to the first pipe along the first direction; a column case between the first pipe and the second pipe, having a first and second holes communicating with the first and second pipes, respectively; and an interlocking mechanism that moves the column case in the first direction in conjunction with movement of the first pipe. The column case allows a column cartridge retaining a separation column to be connected and disconnected. The driving device moves the first pipe and the interlocking mechanism such that two states are reversibly taken; a closed state in which the separation column is between the first and second pipes and an open state in which the first and second pipes are positioned outside the column case.
    Type: Application
    Filed: November 26, 2021
    Publication date: February 22, 2024
    Applicant: HITACHI HIGH-TECH CORPORATION
    Inventors: Taichiro YAMASHITA, Shoji TOMIDA, Yusuke SHIMIZU, Yu IIJIMA, Ai MASUDA, Daichi FURUKAWA
  • Publication number: 20230204612
    Abstract: An automatic analyzer 1 includes a reagent bottle installation unit 200 that installs a reagent bottle 301 containing a reagent used for analysis; a nozzle unit 210 that couples a supply flow path 220 that connects a location where the reagent is used and the inside of the reagent bottle 301 installed in the reagent bottle installation unit 200 to the reagent bottle 301; and a stopper 202 that is disposed on the movement path of a reagent aspiration nozzle 400 of the nozzle unit 210 and prevents the reagent aspiration nozzle 400 from being inserted into the reagent bottle 301. This automatic analyzer realizes the prevention of misplacement of reagent types and the prevention of removal of the reagents at the incorrect timing with less space and constituent components.
    Type: Application
    Filed: February 3, 2021
    Publication date: June 29, 2023
    Applicant: HITACHI HIGH-TECH CORPORATION
    Inventors: Akiko Suzuki, Shinya Matsuoka, Daisuke Ebihara, Mitsuhiko Ueda, Shoji Tomida
  • Publication number: 20220326197
    Abstract: A flowpath switch valve is configured for extended service life by spreading the region, of the sliding surfaces of a stator and a rotor, that is subject to wear over the entirety of the sliding surfaces. The stator has fixed stator flowpaths, and the rotor has rotor flowpaths. A flowpath switch valve, depending on the rotor rotation state, realizes connection patterns that include: a first connection pattern wherein a rotor flowpath 241 connects a fixed stator flowpath 31 and a fixed stator flowpath 32; a second connection pattern wherein the rotor flowpath 241 connects the fixed stator flowpath 31 and a fixed stator flowpath 36; a third connection pattern wherein a rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 32; and a fourth connection pattern wherein the rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 36.
    Type: Application
    Filed: September 10, 2020
    Publication date: October 13, 2022
    Inventors: Ayano OTSUBO, Nobuhiro TSUKADA, Hisao INAMI, Shoji TOMIDA, Mitsuhiko UEDA, Daisuke AKIEDA, Kenichiro NISHIKI
  • Patent number: 10088459
    Abstract: A liquid-mixing device that minimizes solvent leakage and reduces creep of or damage to the component parts of said liquid-mixing device even at ultrahigh pressures of 100 MPa and up. Also, a liquid chromatography device using said liquid-mixing device. Said liquid chromatography device is provided with a supply pump that supplies a plurality of different solutions, a liquid-mixing device that mixes the supplied solutions, a sample injection device that injects a sample into the mixture of solutions, a column that separates the components of the injected sample, and a detector that detects the separated components. The liquid-mixing device has an inlet-side connector through which the plurality of different solutions flow in, a liquid-mixing section in which said solutions are mixed, and an outflow-side connector through which the mixed solutions flow out.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: October 2, 2018
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yugo Onoda, Shoji Tomida, Kouichi Sugimoto, Takashi Yagi, Tetsuya Watanabe
  • Patent number: 9470346
    Abstract: A pipe connection joint which is repeatedly usable when an analysis column is replaced with another in a liquid chromatographic device. To this end, an elastic body is built into a compression screw for inserting a pipe passed through a ferrule into the analysis column to thereby axially movably support the pipe, and a pipe clamp is secured in advance at a predetermined position of the pipe. A distance between the ferrule and the pipe clamp changes on the basis of the length of a portion of the pipe sticking out from the ferrule and the pressing force of the elastic body applied to the pipe.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: October 18, 2016
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Shoji Tomida, Shintaro Kubo, Mitsuhiko Ueda
  • Publication number: 20160266078
    Abstract: A liquid-mixing device that minimizes solvent leakage and reduces creep of or damage to the component parts of said liquid-mixing device even at ultrahigh pressures of 100 MPa and up. Also, a liquid chromatography device using said quid-mixing device. Said liquid chromatography device is provided with a supply pump that supplies a plurality of different solutions, a liquid-mixing device that mixes the supplied solutions, a sample injection device that injects a sample into the mixture of solutions, a column that separates the components of the injected sample, and a detector that detects the separated components. The liquid-mixing device has an inlet-side connector through which the plurality of different solutions flow in, a liquid-mixing section in which said solutions are mixed, and an outflow-side connector through which the mixed solutions flow out.
    Type: Application
    Filed: December 19, 2014
    Publication date: September 15, 2016
    Inventors: Yugo ONODA, Shoji TOMIDA, Kouichi SUGIMOTO, Takashi YAGI, Tetsuya WATANABE
  • Publication number: 20150285414
    Abstract: The present invention provides a pipe connection joint which is repeatedly usable when an analysis column or the like is replaced with another in a liquid chromatographic device. To this end, an elastic body is built into a compression screw for inserting a pipe passed through a ferrule into the analysis column to thereby axially movably support the pipe, and a pipe clamp is secured in advance at a predetermined position of the pipe. A distance between the ferrule and the pipe clamp changes on the basis of the length of a portion of the pipe sticking out from the ferrule and the pressing force of the elastic body applied to the pipe. Consequently, in a liquid chromatographic device, a pipe connection joint for the analysis column or the like can be repeatedly used of plural times.
    Type: Application
    Filed: November 20, 2013
    Publication date: October 8, 2015
    Inventors: Shoji Tomida, Shintaro Kubo, Mitsuhiko Ueda
  • Publication number: 20120219473
    Abstract: A sample rack 1 in which sample holding container 6 containing sample liquid is loaded and cooled via a cooling device 8 includes containing sections 40 adapted to receive the sample holding containers 6, and groove portions 11 disposed with inclination below the bottom surface of the containing section 40. The bottom surface of the containing section 40 communicates with the groove portion 11. The dew condensation water introduced into the groove portion 11 is discharged to the outside of the sample rack 1 via an opening portion 12 provided on the side surface of the sample rack 1. In this way, since the dew condensation water is forcibly discharged, workability encountered during removal of the sample rack and sample cooling capacity can be improved.
    Type: Application
    Filed: October 29, 2010
    Publication date: August 30, 2012
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kimihiko Ishii, Mitsuhiko Ueda, Shoji Tomida, Akira Kuroda, Hiromi Yamashita
  • Patent number: 8158955
    Abstract: An apparatus capable of improving image quality by making it possible to suck specimens of different sizes electrostatically, and uniformalizing an electric field of a specimen edge portion, while suppressing increase in prime cost is provided. Specimen holding means is an electrostatic chuck, a master flat plane part surrounding a specimen of the largest size of specimen sizes, and an opening surrounding a specimen size except for the largest specimen size are included at an outer peripheral portion of the electrostatic chuck, a dummy specimen attachable to and detachable from the electrostatic chuck is included, and at a time of switching the specimen size, a dummy specimen is selected (or may be prevented from being used).
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: April 17, 2012
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Masaki Mizuochi, Shoji Tomida
  • Patent number: D646797
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: October 11, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Mitsuru Oonuma, Akira Omachi, Hiroyuki Noda, Kantaro Maruoka, Shoji Tomida, Tomohiro Shoji
  • Patent number: D693712
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: November 19, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo
  • Patent number: D693713
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: November 19, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo, Yoshimi Kasai
  • Patent number: D693714
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: November 19, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo
  • Patent number: D699609
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: February 18, 2014
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo
  • Patent number: D699610
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: February 18, 2014
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo
  • Patent number: D712065
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: August 26, 2014
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo
  • Patent number: D712066
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: August 26, 2014
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Noda, Masahito Ito, Shoji Tomida, Shintaro Kubo