Patents by Inventor Ryuzo Masaki

Ryuzo Masaki 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 side grinding apparatus and double side polishing apparatus
    Patent number: 6165054
    Abstract: A double side grinding apparatus and a double side polishing apparatus, with a narrow tolerance range, reduces pitching errors, and ensures a sufficient level of rigidity against the force of reaction to machining, while enhancing positioning accuracy. The double side grinding apparatus or a double side polishing apparatus includes a plurality of guideways for supporting and shifting main spindles, and these plural guideways on end define a geometric center matched with the center of gravity of the main spindles. The number of the guideways is preferably three in order not to obstruct the mounting and removal of a workpiece.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: December 26, 2000
    Assignees: Super Silicon Crystal Research Institute Corp., Sumitomo Heavy Industries, Ltd.
    Inventors: Kohzo Abe, Sho Isobe, Yoshiyuki Tomita, Kazutoshi Hara, Ryuzo Masaki, Akio Iwase, Hiroshi Nagata