Patents by Inventor Yoshinobu Hamawaki

Yoshinobu Hamawaki 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).

  • Core-gathering apparatus and a main conveyor belt drive roller structure for the apparatus
    Patent number: 5178221
    Abstract: An apparatus which gathers earthen cores dug out by a boring machine operates with a main conveyor belt and auxiliary conveyor belt which are partially forced in contact with each other so as to sandwich earthen cores inbetween and transfer the cords to a collecting box. The main conveyor belt is driven by a single drive roller that has axially inclined projecting strips on the end portions so as to prevent the main conveyor belt from shifting in position.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: January 12, 1993
    Assignees: Seirei Kogyo Inc., Kawahara Yanmar Inc.
    Inventors: Yoshinobu Hamawaki, Hirofumi Kawahara