Patents by Inventor Masanao Shibui

Masanao Shibui 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).

  • Double-surface machining system
    Patent number: 5921729
    Abstract: A double surface machining system for machining both side surfaces of a workpiece comprises, in an operational state, a pair of upper and lower spindle heads to be vertically positioned and driven, respectively, a pair of upper and lower spindles provided for the upper and lower spindle heads, respectively, in parallel to each other, to be rotatable about horizontal axes thereof, the upper and lower spindles having front ends to which tools are mounted, respectively, a pair of upper and lower workpiece supports for supporting the workpiece therebetween, which are vertically positioned and driven on one side of the upper and lower spindle heads as viewed from a workpiece feed direction, respectively, and another pair of upper and lower workpiece supports for supporting the workpiece therebetween, which are vertically positioned and driven on another one side of the upper and lower spindle heads as viewed from a workpiece feed direction, respectively.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: July 13, 1999
    Assignees: Kabushiki Kaisha Toshiba, Japan Atomic Energy Research Institute
    Inventors: Mitsuru Kikuchi, Koya Watanabe, Yutaka Noda, Masanao Shibui