Patents by Inventor Hayato Kurokawa

Hayato Kurokawa 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).

  • Water treatment apparatus and method
    Patent number: 7622042
    Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: November 24, 2009
    Assignee: Fuji Clean Co., Ltd.
    Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
  • Water treatment apparatus
    Publication number: 20090057211
    Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.
    Type: Application
    Filed: October 22, 2008
    Publication date: March 5, 2009
    Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
  • Water treatment method and apparatus
    Patent number: 7455775
    Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: November 25, 2008
    Assignee: Fuji Clean Co., Ltd.
    Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
  • Water treatment apparatus
    Publication number: 20070114175
    Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 24, 2007
    Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama