Patents by Inventor Setsuo Tokunaga

Setsuo Tokunaga 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).

  • Flow damper, pressure-accumulation and water-injection apparatus, and nuclear installation
    Patent number: 10907668
    Abstract: A flow damper including a cylindrical vortex chamber, a small flow-rate pipe connected to a peripheral plate of the vortex chamber along a tangential direction, a large flow-rate pipe connected to the peripheral plate with a predetermined angle with respect to the small flow-rate pipe, an outlet pipe connected to an outlet formed in a central part of the vortex chamber, and a pressure equalization pipe with respective ends being connected to the peripheral plate on opposite sides of the outlet and at positions closer to a connection portion between the small flow-rate pipe and the large flow-rate pipe than positions facing each other, putting the outlet therebetween. The pressure equalization pipe is arranged with at least a part thereof is located at a higher position than a top plate of the vortex chamber, and an outgassing hole is provided at an uppermost part of the pressure equalization pipe.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: February 2, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masamichi Iino, Shigeto Hirai, Taiki Asahara, Takafumi Ogino, Akira Kirita, Akihiro Toda, Hideyuki Sakata, Yutaka Tanaka, Setsuo Tokunaga, Takashi Nakahara, Takanori Okazaki
  • FLOW DAMPER, PRESSURE-ACCUMULATION AND WATER-INJECTION APPARATUS, AND NUCLEAR INSTALLATION
    Publication number: 20180358137
    Abstract: A flow damper including a cylindrical vortex chamber, a small flow-rate pipe connected to a peripheral plate of the vortex chamber along a tangential direction, a large flow-rate pipe connected to the peripheral plate with a predetermined angle with respect to the small flow-rate pipe, an outlet pipe connected to an outlet formed in a central part of the vortex chamber, and a pressure equalization pipe with respective ends being connected to the peripheral plate on opposite sides of the outlet and at positions closer to a connection portion between the small flow-rate pipe and the large flow-rate pipe than positions facing each other, putting the outlet therebetween. The pressure equalization pipe is arranged with at least a part thereof is located at a higher position than a top plate of the vortex chamber, and an outgassing hole is provided at an uppermost part of the pressure equalization pipe.
    Type: Application
    Filed: January 27, 2017
    Publication date: December 13, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masamichi Iino, Shigeto Hirai, Taiki Asahara, Takafumi Ogino, Akira Kirita, Akihiro Toda, Hideyuki Sakata, Yutaka Tanaka, Setsuo Tokunaga, Takashi Nakahara, Takanori Okazaki