Patents by Inventor Haruyasu Toyoda

Haruyasu Toyoda 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).

  • Drill having plate-like cutter member fixed at proximal end to shank and having cutting edge at distal portion
    Patent number: 5909985
    Abstract: A drill including a cutter member and a shank which are formed separately from each other and fixed to each other for rotation as a unit, wherein the shank has an engaging groove formed in a distal end face thereof such that the engaging groove extends in an axial direction of the shank and is aligned with a center of the distal end face, and the cutter member consists of a rectangular plate including a proximal end portion fixed to the shank by engagement thereof with the engaging groove, and a distal end portion which is remote from the shank and which has at least one cutting edge.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: June 8, 1999
    Assignee: Fuji Seiko Limited
    Inventors: Kiyotaka Shiga, Akio Fukui, Kazuaki Terada, Takahiro Yamada, Haruyasu Toyoda, Masashi Miyake, Akihiro Umeda