Patents by Inventor Hiroyasu Sakai

Hiroyasu Sakai 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).

  • Reamer with guide surface and method of finishing hole by using the same
    Patent number: 6206617
    Abstract: A reamer including; a generally cylindrical cutter body having (a) a flute formed in an outer circumferential surface of the cutter body and extending from an axially distal end of the cutter body toward an axially proximal end of the cutter body, (b) a cutting blade portion positioned at a longitudinally distal end of a downstream one of widthwise opposite edges of the flute as viewed in a rotating direction of the reamer, and (c) a guide portion having a guide surface which is circumferentially adjacent to the flute and which circumferentially extends over at least 240° about an axis of the cutter body. The guide surface is a part of the outer circumferential surface of the cutter body.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: March 27, 2001
    Assignee: Fuji Seiko Limited
    Inventors: Tetsuhiro Kawazoe, Mitsuhiko Tomioka, Tetsuro Nakanose, Motoshi Nakamura, Hiroyasu Sakai, Toshihiro Yasuda