Patents by Inventor Tetsuji Kawahara

Tetsuji Kawahara 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: 20210025909
    Abstract: Provided is an electrolyte analyzing device in which contamination caused by contacting different reagents with a suction nozzle is prevented when reagent replacement is performed by a user. The electrolyte analyzing device includes a reagent container setting unit 502 that sets a dilute solution bottle 101-1 which houses a dilute solution, an internal standard solution bottle 101-2 which houses an internal standard solution, and a reference electrode solution bottle 101-3 which houses a reference electrode solution. The reagent container setting unit includes a partition wall between the dilute solution bottle 101-1 and the internal standard solution bottle 101-2, and the reference electrode solution bottle 101-3 when the dilute solution bottle 101-1, the internal standard solution bottle 101-2, and the reference electrode solution bottle 101-3 are set.
    Type: Application
    Filed: March 26, 2019
    Publication date: January 28, 2021
    Applicant: Hitachi High-Tech Corporation
    Inventors: Takushi Miyakawa, Masaki Hara, Tetsuji Kawahara
  • Publication number: 20200386779
    Abstract: When the automatic analyzer is installed in an environment with a high altitude and different external atmospheric pressures, there is a problem that an amount of vacuum suction decreases due to a decrease in suction performance of a vacuum pump and it is difficult to perform vacuum suction of an analyzed reaction liquid. In view of the above, by newly providing a pressure adjustment mechanism within a flow path connecting a vacuum tank to vacuum pump, it possible to control the pressure difference between a pressure in the vacuum tank and an external atmospheric pressure where the analyzer is installed to be constant regardless of the installation environment. Additionally, by providing a hole in communication with the outside in the vacuum tank or a vacuum bin, it possible to control the pressure difference between the pressure in the vacuum tank and the external atmospheric pressure where the analyzer is installed to be constant regardless of the installation environment.
    Type: Application
    Filed: February 26, 2018
    Publication date: December 10, 2020
    Inventors: Tooru INABA, Takamichi MORI, Tetsuji KAWAHARA
  • Publication number: 20200225254
    Abstract: The automatic analyzer includes a gear pump that supplies cleaning water to reagent probes and sample probes; a cleaning flow path that feeds the cleaning water discharged from the gear pump to the respective probes; a pressure sensor that measures pressure of the cleaning flow path; a return flow path that is disposed in parallel to the gear pump and connects a discharging port side of the gear pump and an aspirating port side thereof; a throttling unit that is disposed in the return flow path and adjusts a flow rate of the cleaning water flowing through the return flow path; and a control unit that changes an opening and closing degree of the throttling unit according to a measurement result of the pressure sensor. Accordingly, it is unnecessary to control driving of a pump used for cleaning a probe while having a low cost and a small mounting size.
    Type: Application
    Filed: August 7, 2017
    Publication date: July 16, 2020
    Inventors: Masaki HARA, Tetsuji KAWAHARA, Hiroyuki TAKAYAMA
  • Publication number: 20200009623
    Abstract: A nozzle cleaner includes: a cleaning tank which stores a cleaning solution; a first conductive member that is disposed to be immersed into the cleaning solution stored in the cleaning tank when the nozzle is cleaned; an ultrasonic wave generating mechanism which is disposed so that at least a part of a second conductive member is immersed into the cleaning solution stored in the cleaning tank when the nozzle is cleaned and generates an ultrasonic vibration in the cleaning solution stored in the cleaning tank; a first voltage control unit which controls a potential applied to the first conductive member; and a second voltage control unit which controls a potential applied to the second conductive member, wherein the first voltage control unit applies a second potential V2 higher than a first potential V1 applied to the nozzle when the nozzle is cleaned to the first conductive member.
    Type: Application
    Filed: December 8, 2017
    Publication date: January 9, 2020
    Inventors: Takushi MIYAKAWA, Gorou YOSHIDA, Yuto TANAKA, Kohei NONAKA, Takamichi MORI, Tetsuji KAWAHARA
  • Publication number: 20200009619
    Abstract: To suppress precipitation of a cleaning solution to a vibration head of an ultrasonic cleaner. An ultrasonic cleaner includes: a cleaning tank which stores a cleaning solution; an ultrasonic transducer; and a vibration head which extends from the ultrasonic transducer toward the cleaning tank and of which a tip portion includes a cylindrical hole having a longitudinal direction aligned to a vertical direction, wherein the ultrasonic transducer is driven at a frequency at which the vibration head is vibrated resonantly, and wherein the vibration head is provided with a hydrophobic or hydrophilic coating film 502 which has an interface between an area 223 corresponding to a vibration antinode and area corresponding to a vibration node during the resonant vibration of the vibration head, and covers the area 222 corresponding to the vibration node.
    Type: Application
    Filed: November 28, 2017
    Publication date: January 9, 2020
    Inventors: Kohei NONAKA, Tetsuji KAWAHARA, Takamichi MORI
  • Publication number: 20190366391
    Abstract: An ultrasonic cleaner includes: a cleaning tank; an ultrasonic transducer; a vibration head which extends from the ultrasonic transducer toward the cleaning tank and of which a tip portion includes a cylindrical hole having a longitudinal direction aligned to a vertical direction; and an air layer or a metallic member that is provided in an area formed by projecting at least the vibration head in the vertical direction under the cleaning tank, wherein the ultrasonic transducer is driven at a frequency at which the vibration head is vibrated resonantly in a vibration mode accompanied by a deformation in the longitudinal direction of the cylindrical hole and a direction perpendicular to the longitudinal direction, wherein an area formed by projecting at least the vibration head in the vertical direction in a bottom portion of the cleaning tank is formed of a material mainly including resin.
    Type: Application
    Filed: November 15, 2017
    Publication date: December 5, 2019
    Inventors: Yosuke HORIE, Atsushi KAZAMA, Tetsuji KAWAHARA, Takamichi MORI, Kohei NONAKA
  • Publication number: 20190346468
    Abstract: The automatic analyzer includes a storage unit storing the reaction containers of cleaning target by day unit in such a manner that all the reaction containers mounted on a reaction disk are to be cleaning target within a plurality of days, and a control unit exerts a control in such a manner that during an operation state after the sample of analysis object is dispensed to the reaction containers, a sample of analysis object in each of the reaction containers is analyzed, and not the sample but a detergent is dispensed to the reaction containers of cleaning target of an appointed day, the reaction containers of cleaning target of the appointed day being stored in the storage unit, to soak and wash the reaction containers for a certain time.
    Type: Application
    Filed: January 12, 2018
    Publication date: November 14, 2019
    Inventors: Takashi NAKASAWA, Tetsuji KAWAHARA, Masaharu NISHIDA, Yoko INOUE, Kenichi YAGI, Osamu MATSUMOTO, Sayaka ASADA
  • Publication number: 20190339296
    Abstract: An automatic analyzer includes a cleaning mechanism performing cleaning to drying of a probe in a short time even with a wide cleaning range of the probe. The automatic analyzer includes: a cleaning tank into which a probe is insertable and which has a cleaning port provided with suction openings; a vacuum tank; a vacuum pump that causes the vacuum tank to enter a negative pressure state, compared to atmospheric pressure; a vacuum bin; a suction nozzle that connects the suction opening of the cleaning port and the vacuum bin; a vacuum nozzle that connects the vacuum tank and the vacuum bin; and a controller. The controller causes the vacuum tank which is in the negative pressure state and the cleaning port to be conducted via the vacuum bin in a period during which a cleaning solution, with which the probe is cleaned, is discharged through the cleaning port.
    Type: Application
    Filed: January 23, 2018
    Publication date: November 7, 2019
    Inventors: Takamichi MORI, Tetsuji KAWAHARA, Yuichi IWASE
  • Patent number: 8997589
    Abstract: A rack buffer unit 8 serving as a sample-container switching unit is provided between a rack conveying module 4 and a rack conveying module 5 which convey racks 2 on which the sample containers 1 are mounted, and an urgent-sample loading module 7 installing a rack 2 on which a sample container 1 storing a sample desired to be preferentially analyzed is mounted is provided. The rack 2 which is in the process of sample dispensing and the rack 2 desired to be preferentially analyzed are switched from each other by the rack buffer unit 8, and the sample container 1 mounted on the rack 2 desired to be preferentially analyzed is moved to a sample dispensing position in a short period of time.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: April 7, 2015
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hidenobu Komatsu, Katsuhiro Kambara, Tetsuji Kawahara, Kentaro Wada
  • Publication number: 20140227135
    Abstract: To reduce the amount of warping deformation of a reaction cell block for an analysis device in which reaction cells and a holder are formed integrally in a complex shape with a resin material. At least one rib is provided on the front surface or the rear surface of one or both of a reaction cell arrangement face 4 or a coupling face 5 of a reaction cell block 18, the coupling face 5 being adapted to join the reaction cell arrangement face 4 and a flange face for attachment to an analysis device, whereby rigidity is increased.
    Type: Application
    Filed: June 4, 2012
    Publication date: August 14, 2014
    Inventors: Tsutomu Kono, Tetsuji Kawahara, Norihisa Komori
  • Patent number: 8278108
    Abstract: An automatic analyzer of the type equipped with a sample preprocessing function pretreats a desired sample in a pretreating unit before pipetting the sample into an analyzing unit for analysis. When all samples are carried to the analyzing unit via the pretreating unit, irrespective of whether the sample is to be pretreated, this causes loss in terms of both costs and installation space requirements. In the case where the preprocessing is required, a minimal quantity of the sample is also necessary in order to make the sample react to the preprocessing liquid. In addition, the possible presence of a residual sample left in the pretreating unit could affect analytical results. The automatic analyzer which includes an analyzing unit and a pretreating unit further includes a sample-pipetting mechanism constructed to have a function that allows the mechanism to access a plurality of pipetting positions without a sample sucking/discharging position being fixed.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: October 2, 2012
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Kentaro Wada, Katsuhiro Kambara, Tetsuji Kawahara, Hidenobu Komatsu
  • Publication number: 20110283779
    Abstract: An automatic analyzer of the type equipped with a sample preprocessing function pretreats a desired sample in a pretreating unit before pipetting the sample into an analyzing unit for analysis. When all samples are carried to the analyzing unit via the pretreating unit, irrespective of whether the sample is to be pretreated, this causes loss in terms of both costs and installation space requirements. In the case where the preprocessing is required, a minimal quantity of the sample is also necessary in order to make the sample react to the preprocessing liquid. In addition, the possible presence of a residual sample left in the pretreating unit could affect analytical results. The automatic analyzer which includes an analyzing unit and a pretreating unit further includes a sample-pipetting mechanism constructed to have a function that allows the mechanism to access a plurality of pipetting positions without a sample sucking/discharging position being fixed.
    Type: Application
    Filed: January 22, 2010
    Publication date: November 24, 2011
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kentaro Wada, Katsuhiro Kambara, Tetsuji Kawahara, Hidenobu Komatsu
  • Publication number: 20110271773
    Abstract: A rack buffer unit 8 serving as a sample-container switching unit is provided between a rack conveying module 4 and a rack conveying module 5 which convey racks 2 on which the sample containers 1 are mounted, and an urgent-sample loading module 7 installing a rack 2 on which a sample container 1 storing a sample desired to be preferentially analyzed is mounted is provided. The rack 2 which is in the process of sample dispensing and the rack 2 desired to be preferentially analyzed are switched from each other by the rack buffer unit 8, and the sample container 1 mounted on the rack 2 desired to be preferentially analyzed is moved to a sample dispensing position in a short period of time.
    Type: Application
    Filed: January 25, 2010
    Publication date: November 10, 2011
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Hidenobu Komatsu, Katsuhiro Kambara, Tetsuji Kawahara, Kentaro Wada
  • Publication number: 20080213132
    Abstract: In an automatic analyzer, effect is reduced or prevented of a change in temperature and volume of components making up a mechanism for dispensing a reagent and a sample or a system liquid on an amount of sample and reagent per one dispensing cycle. One or a plurality of components making up the mechanism for dispensing the reagent and the sample is mounted with a sensor for measuring a temperature of the component. The dispensing mechanism further includes a sensor for measuring a temperature of the system liquid at one or a plurality of locations. Control is thereby provided, based on temperature information provided by the temperature sensor, to vary an amount of operation of a component that varies an amount of reagent and sample to be dispensed or to make the temperature of the system liquid equal to, or close to, the temperature of the component.
    Type: Application
    Filed: February 15, 2008
    Publication date: September 4, 2008
    Inventors: Shigenori Watari, Tetsuji Kawahara, Kunihiko Soma
  • Patent number: D838382
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: January 15, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ai Masuda, Hiroyuki Noda, Mitsuru Oonuma, Tetsuji Kawahara, Takamichi Mori
  • Patent number: D838383
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: January 15, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ai Masuda, Hiroyuki Noda, Mitsuru Oonuma, Tetsuji Kawahara, Yuichi Koiso
  • Patent number: D846138
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 16, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ai Masuda, Hiroyuki Noda, Mitsuru Oonuma, Tetsuji Kawahara, Takamichi Mori
  • Patent number: D846139
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 16, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ai Masuda, Hiroyuki Noda, Mitsuru Oonuma, Tetsuji Kawahara, Yuichi Koiso
  • Patent number: D846140
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 16, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ai Masuda, Hiroyuki Noda, Mitsuru Oonuma, Tetsuji Kawahara, Yuichi Koiso