Patents by Inventor Yuka Hiraga

Yuka Hiraga 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).

  • Membrane filtration system
    Patent number: 9932250
    Abstract: According to one embodiment, a membrane filtration system includes a raw water tank, a pretreatment membrane module, a raw water feed line, a high-pressure RO membrane module, a high-pressure line, a preceding power recovery unit which pressurize the pretreated water by transmitting the pressure of the concentrate to the pretreated water, a succeeding power recovery unit which pressurize the raw water by transmitting a remaining pressure of the concentrate to the raw water, a concentrate discharge line, a first pressure transmission line communicating to the power recovery unit by being branched from the high-pressure line, a second pressure transmission line communicating to the power recovery unit by being branched from the raw water feed line, and a valve provided in the drain line to regulate a discharge of the concentrate from the power recovery unit in accordance with a pressure loss in the pretreatment membrane module.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: April 3, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Matsushiro, Katsuya Yokokawa, Futoshi Kurokawa, Ryo Namba, Koichi Matsui, Hideaki Yamagata, Yuka Hiraga, Seiichi Murayama, Hiroyuki Tokimoto
  • MEMBRANE FILTRATION SYSTEM
    Publication number: 20160009572
    Abstract: According to one embodiment, a membrane filtration system includes a raw water tank, a pretreatment membrane module, a raw water feed line, a high-pressure RO membrane module, a high-pressure line, a preceding power recovery unit which pressurize the pretreated water by transmitting the pressure of the concentrate to the pretreated water, a succeeding power recovery unit which pressurize the raw water by transmitting a remaining pressure of the concentrate to the raw water, a concentrate discharge line, a first pressure transmission line communicating to the power recovery unit by being branched from the high-pressure line, a second pressure transmission line communicating to the power recovery unit by being branched from the raw water feed line, and a valve provided in the drain line to regulate a discharge of the concentrate from the power recovery unit in accordance with a pressure loss in the pretreatment membrane module.
    Type: Application
    Filed: September 21, 2015
    Publication date: January 14, 2016
    Inventors: Takeshi MATSUSHIRO, Katsuya YOKOKAWA, Futoshi KUROKAWA, Ryo NAMBA, Koichi MATSUI, Hideaki YAMAGATA, Yuka HIRAGA, Seiichi MURAYAMA, Hiroyuki TOKIMOTO
  • MEMBRANE FILTRATION SYSTEM
    Publication number: 20120061300
    Abstract: According to one embodiment, a membrane filtration system includes a raw water tank, a pretreatment membrane module, a raw water feed line, a high-pressure RO membrane module, a high-pressure line, a preceding power recovery unit which pressurize the pretreated water by transmitting the pressure of the concentrate to the pretreated water, a succeeding power recovery unit which pressurize the raw water by transmitting a remaining pressure of the concentrate to the raw water, a concentrate discharge line, a first pressure transmission line communicating to the power recovery unit by being branched from the high-pressure line, a second pressure transmission line communicating to the power recovery unit by being branched from the raw water feed line, and a valve provided in the drain line to regulate a discharge of the concentrate from the power recovery unit in accordance with a pressure loss in the pretreatment membrane module.
    Type: Application
    Filed: July 19, 2011
    Publication date: March 15, 2012
    Inventors: Takeshi Matsushiro, Katsuya Yokokawa, Futoshi Kurokawa, Ryo Namba, Koichi Matsui, Hideaki Yamagata, Yuka Hiraga, Seiichi Murayama, Hiroyuki Tokimoto