Patents by Inventor Hiroyuki Yokoseki

Hiroyuki Yokoseki 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).

  • Tool holder device having screw-operated means for connection and disconnection of two engageable members for attachment and removal of cutting tool
    Patent number: 5243884
    Abstract: A tool holder device including a first and a second member having respectively a projection and a bore which are engageable with each other. The second member has an annular groove which partially defines the bore and is coaxial with the bore. The projection has a through-hole in which are received two engaging members having respective inclined surfaces which are abuttable against with an inclined surface of the annular groove when the two engaging members are moved away from each other upon rotation of a threaded member which engages at least one of the two engaging members. The inclined surfaces of the engaging members and annular groove permit a tight fit between the projection and bore, for removable connection of the first and second members.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: September 14, 1993
    Assignee: Fuji Seiko Limited
    Inventors: Katsutoshi Haga, Mitsuhiko Tomioka, Hiroyuki Yokoseki, Tatsuro Takami, Hisatoshi Yoshida, Kenji Odaka