Patents by Inventor Yuji Takegawa

Yuji Takegawa 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).

  • Apparatus for dispensing a predetermined volume of paste-like fluid
    Patent number: 4848606
    Abstract: A piston driving device for dispensing a predetermined small amount of paste-like material from a nozzle in response to an electrical signal without any time-delay is enabled by the slow rotation of a ball-screw shaft, the rotation being reduced by a differential gear system. A female ball-nut fitted onto the ball-screw shaft causes a piston plunger to advance at very low speed such that dispensing of the predetermined volume of paste-like fluid is possible. Vertical motion of a nozzle is compensated by vertical motion of a piston driving device such that the relative position of a piston against a nozzle is unchanged.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: July 18, 1989
    Assignee: Tokyo Juki Industrial Co., Ltd.
    Inventors: Katsuhiko Taguchi, Yoshimi Imamiya, Yuji Takegawa, Kiyoshi Kuroda, Sotonari Arashi