Patents by Inventor Junji Hirotsuji

Junji Hirotsuji 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).

  • Method and apparatus for preventing biofouling in cooling water system
    Patent number: 6086772
    Abstract: A method for preventing biofouling in a cooling water system wherein ozone of high density is intermittently injected into a circulating line of a cooling water system in which cooling water is made to circulate in a closed system which includes a cooling tower and a heat exchanger. There is further disclosed an apparatus for preventing biofouling in a cooling water system, comprising an ozone generator for producing ozone, an ozone reservoir for temporarily storing the produced ozone, and an ozone injector for injecting the stored ozone into a circulating line of a cooling water system. Biofouling can be economically and reliably prevented.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: July 11, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Tanimura, Junji Hirotsuji, Shigeki Nakayama, Hisao Amitani, Hiroshi Yuge, Tateki Ozawa
  • Ozone supplying apparatus with fluid purification and recycling
    Patent number: 6083464
    Abstract: An ozone supplying apparatus comprising an ozone generator, an adsorption/desorption device for adsorbing and storing ozone from ozonized oxygen, and an ozone desorbing means, the apparatus being arranged to return oxygen to the ozone generator after desorbing ozone therefrom to desorb ozone from the adsorption/desorption device and to perform treatment of an object by mixing the ozone with fluid. The apparatus further includes a fluid storing means for storing fluid after being injected with ozone and a fluid treating means for treating the fluid after treatment of the object.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: July 4, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Tanimura, Junji Hirotsuji, Shigeki Nakayama, Hisao Amitani, Hiroshi Yuge, Tateki Ozawa
  • Ozone producing apparatus utilizing feedback control from ozone density measurement
    Patent number: 6054102
    Abstract: An ozone producing apparatus comprising an ozone generator, an adsorption/desorption tower, and an ozone desorbing means for desorbing adsorbed and stored ozone for supply, wherein the apparatus further includes an ozone density measuring means, and a control circuit for adjusting an amount of electric power for the ozone generator by comparing the measured value detected by the measuring means with a set value. A specified amount of ozone can be desorbed and treated in a stable manner in a just sufficient amount also in a case in which characteristics of the adsorbent or the ozone generator, temperature or degree of pollution of the water, multiplication speed of microorganisms or reaction speed of ozone should happen to be changed, so that adhesion of slime can be prevented in a stable manner over a long period.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: April 25, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Tanimura, Junji Hirotsuji, Shigeki Nakayama, Hisao Amitani, Hiroshi Yuge, Tateki Ozawa
  • Ozone storing method and ozone storage system
    Patent number: 5888271
    Abstract: An ozone storage system which allows energy required for producing and storing ozone to be reduced and which supplies ozone as stored to an ozone consumer stably in continuation.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: March 30, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Tanimura, Masaki Kuzumoto, Junji Hirotsuji, Shigeki Nakayama