Patents by Inventor Kouichi AKATSU

Kouichi AKATSU 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: 9981274
    Abstract: A centrifuge including: a rotor configured to hold a sample and configured to be detachably mounted, a rotation chamber accommodating the rotor, a plurality of motors configured to be rotationally driven by three-phase AC power, and a control device configured to control centrifuging operation, wherein one of the plurality of motors is a centrifuge motor configured to rotate the rotor, and the control device is configured to change distribution of power supplied to the centrifuge motor and power supplied to another motor of the plurality of motors during one operation.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: May 29, 2018
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
  • Patent number: 9375730
    Abstract: A centrifuge including: a rotor configured to be driven by a motor and to hold a sample, a centrifuge inverter, a chamber accommodating the rotor, a temperature sensor configured to detect the temperature of the chamber, a cooling machine configured to cool the chamber and including a compressor, a compressor inverter, a compressor motor configured to be controlled in a variable speed and a control device, wherein the control device carries out a feedback control of the compressor motor based on a preset temperature and a detected temperature of the temperature sensor when the rotation number of the compressor motor is larger than a predetermined rotation number, and the control device carries out an intermittent control for turning ON-OFF the cooling function of the compressor when the rotation number of the compressor motor is smaller than a predetermined rotation number.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: June 28, 2016
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
  • Publication number: 20140031191
    Abstract: A centrifuge including: a rotor configured to hold a sample and configured to be detachably mounted, a rotation chamber accommodating the rotor, a plurality of motors configured to be rotationally driven by three-phase AC power, and a control device configured to control centrifuging operation, wherein one of the plurality of motors is a centrifuge motor configured to rotate the rotor, and the control device is configured to change distribution of power supplied to the centrifuge motor and power supplied to another motor of the plurality of motors during one operation.
    Type: Application
    Filed: April 13, 2012
    Publication date: January 30, 2014
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
  • Patent number: 8409068
    Abstract: A centrifuge comprises a rotor for holding a sample, a rotation chamber for housing the rotor, a motor for rotating the rotor, an oil diffusion pump for reducing a pressure within the rotation chamber, and a control unit for controlling the heater temperature of the oil diffusion pump for a target set temperature. The control unit changes the target set temperature from a first given temperature to a second given temperature that is lower than the first given temperature after a given period of time elapses since the start of control of the heater temperature.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: April 2, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kouichi Akatsu, Masahiro Inaniwa, Hisanobu Ooyama, Shinichi Haruki
  • Publication number: 20120260687
    Abstract: A centrifuge including: a rotor configured to be driven by a motor and to hold a sample, a centrifuge inverter, a chamber accommodating the rotor, a temperature sensor configured to detect the temperature of the chamber, a cooling machine configured to cool the chamber and including a compressor, a compressor inverter, a compressor motor configured to be controlled in a variable speed and a control device, wherein the control device carries out a feedback control of the compressor motor based on a preset temperature and a detected temperature of the temperature sensor when the rotation number of the compressor motor is larger than a predetermined rotation number, and the control device carries out an intermittent control for turning ON-OFF the cooling function of the compressor when the rotation number of the compressor motor is smaller than a predetermined rotation number.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 18, 2012
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Masahiro INANIWA, Hiroyuki TAKAHASHI, Kouichi AKATSU, Hisanobu OOYAMA, Yuki HODOTSUKA, Hidetaka OSAWA
  • Publication number: 20110021332
    Abstract: A centrifuge comprises a rotor for holding a sample, a rotation chamber for housing the rotor, a motor for rotating the rotor, an oil diffusion pump for reducing a pressure within the rotation chamber, and a control unit for controlling the heater temperature of the oil diffusion pump for a target set temperature. The control unit changes the target set temperature from a first given temperature to a second given temperature that is lower than the first given temperature after a given period of time elapses since the start of control of the heater temperature.
    Type: Application
    Filed: July 27, 2010
    Publication date: January 27, 2011
    Inventors: Kouichi AKATSU, Masahiro Inaniwa, Hisanobu Ooyama, Shinichi Haruki