Patents by Inventor Katsuji Iijima

Katsuji Iijima 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).

  • Performance regulating device for fluid machinery
    Patent number: 6520745
    Abstract: An apparatus for controlling performance of a fluid machinery by controlling rotational speed of the fluid machinery. A performance regulating device for the fluid machinery includes a frequency converter, a casing for housing the frequency converter so as to ensure being airtight against an atmosphere, an input, and an output connected to the casing so as to ensure being airtight against the atmosphere.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: February 18, 2003
    Assignee: Ebara Corporation
    Inventors: Masakazu Yamamoto, Yoshio Miyake, Junya Kawabata, Keita Uwai, Yoshiaki Miyazaki, Katsuji Iijima, Makoto Kobayashi
  • Fluid machinery
    Patent number: 6435836
    Abstract: The present invention relates to a pump for delivering under pressure various liquids including water. The temperature of the handled liquid in a pump casing (1) is detected by a thermistor (51). If an increase in the temperature per time of the handled liquid is greater than a predetermined value, then the pump is shut down, or the flow rate or pressure of the liquid is changed depending on the temperature of the handled liquid detected by the thermistor based on a predetermined control program.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: August 20, 2002
    Assignee: Ebara Corporation
    Inventors: Makoto Kobayashi, Masakazu Yamamoto, Yoshio Miyake, Junya Kawabata, Keita Uwai, Yoshiaki Miyazaki, Katsuji Iijima
  • Frequency and current control for fluid machinery
    Patent number: 6350105
    Abstract: A fluid machinery for generating a pressure by rotating an impeller with a motor has a frequency converter (F) for supplying electric power to the motor, a detector for detecting a frequency and a current value, and a program for specifying in advance the relationship between the frequency and the current value. A frequency and a current value in an actual operation are compared with the specified program, and the frequency generated by the frequency converter (F) is varied so that an operating point of the fluid machinery approaches the specified program.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: February 26, 2002
    Assignee: Ebara Corporation
    Inventors: Makoto Kobayashi, Masakazu Yamamoto, Yoshio Miyake, Kaoru Yagi, Keita Uwai, Yoshiaki Miyazaki, Katsuji Iijima
  • FLUID MACHINERY
    Publication number: 20020018721
    Abstract: The present invention relates to a fluid machinery for generating a pressure by rotating an impeller with a motor. The fluid machinery has a frequency converter (F) for supplying electric power to the motor, a detector for detecting a frequency and a current value, and a program for specifying in advance the relationship between the frequency and the current value. A frequency and a current value in an actual operation are compared with the specified program, and the frequency generated by the frequency converter (F) is varied so that an operating point of the fluid machinery approaches the specified program.
    Type: Application
    Filed: October 25, 1999
    Publication date: February 14, 2002
    Inventors: MAKOTO KOBAYASHI, MASAKAZU YAMAMOTO, YOSHIO MIYAKE, KAORU YAGI, KEITA UWAI, YOSHIAKI MIYAZAKI, KATSUJI IIJIMA
  • Pump having first and second outer casing members
    Patent number: 5888053
    Abstract: A pump having an improved fluid passage has an inner casing which houses at least one impeller and an outer casing which houses the inner casing. The pump also has a communicating pipe disposed outside of the outer casing for guiding a main flow of a fluid being handled from a space defined in the outer casing into another space defined in the outer casing.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: March 30, 1999
    Assignee: Ebara Corporation
    Inventors: Makoto Kobayashi, Masakazu Yamamoto, Yoshio Miyake, Koji Isemoto, Kaoru Yagi, Keita Uwai, Yoshiaki Miyazaki, Katsuji Iijima, Junya Kawabata