Patents by Inventor Masayasu Uga

Masayasu Uga 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).

  • Ink jet head including a connector having a joining component with a plurality of electroconductive particles contained therein and a method of producing said ink jet head
    Patent number: 5719606
    Abstract: An ink jet head of an ink jet printer of a drop-on-demand type achieves mounting or connection between a driving electrode and an external electrode easily and surely and at the same time reduces revolution of a piezoelectric material during driving. Between the driving electrode with an insulating film and the external electrode is provided an electrical joining component containing electroconductive particles that are harder than the insulating film and that have a particle diameter larger than the thickness of the insulating film. At the bottom part of a slot in a piezoelectric material that forms an ink chamber and pressure chamber is provided a concave portion having a shape formed of combined at least two lines or surfaces. A part of a surface causing a revolution is converted to a component causing a shearing mode.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: February 17, 1998
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Keisuke Kigawa, Tomoo Ikeda, Masayasu Uga, Yoshiyuki Nagashima, Hisato Hiraishi