Patents by Inventor Daiki HANAOKA

Daiki HANAOKA 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).

  • Valve mechanism and liquid ejecting system
    Patent number: 11946551
    Abstract: A first valve mechanism is a valve mechanism provided in a flow path coupled to a liquid ejecting head that ejects a liquid, and including a valve that opens/closes the flow path, a first communication liquid chamber that communicates with the flow path, and a first pressure receiving body that converts a pressure difference between a pressure of the first communication liquid chamber and a reference pressure into an operating force of the valve, in which a threshold pressure of the first communication liquid chamber for determining opening/closing of the valve is variable.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: April 2, 2024
    Assignee: Seiko Epson Corporation
    Inventors: Yukihiro Hanaoka, Toshiro Murayama, Daiki Tatsuta
  • Oil composition for electrical discharge machining
    Patent number: 9993889
    Abstract: An electrical discharge machining oil composition of the invention includes an organic acid metal salt and a base oil, in which the organic acid metal salt is an organic acid salt of a metal having an electronegativity on Pauling scale of 2 or less, and the present composition has a volume resistivity at 80 degrees C. of 2×10?5 T?·m or more and a kinematic viscosity at 40 degrees C. in a range from 0.5 mm2/s to 10 mm2/s.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: June 12, 2018
    Assignees: IDEMITSU KOSAN CO., LTD., Nagaoka University of Technology
    Inventors: Tomohiko Kitamura, Yasushi Fukuzawa, Ken Yamashita, Daiki Hanaoka
  • OIL COMPOSITION FOR ELECTRICAL DISCHARGE MACHINING
    Publication number: 20170173716
    Abstract: An electrical discharge machining oil composition of the invention includes an organic acid metal salt and a base oil, in which the organic acid metal salt is an organic acid salt of a metal having an electronegativity on Pauling scale of 2 or less, and the present composition has a volume resistivity at 80 degrees C. of 2×10?5 T?·m or more and a kinematic viscosity at 40 degrees C. in a range from 0.5 mm2/s to 10 mm2/s.
    Type: Application
    Filed: March 27, 2015
    Publication date: June 22, 2017
    Applicants: IDEMITSU KOSAN CO., LTD., Nagaoka University of Technology
    Inventors: Tomohiko KITAMURA, YASUSHI FUKUZAWA, Ken YAMASHITA, Daiki HANAOKA