Patents by Inventor Junji Masui

Junji Masui 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).

  • Digital displacement measuring instrument
    Patent number: 7877894
    Abstract: A digital displacement measuring instrument includes a spindle screwed into a body to be axially advanced and retracted relative to the body; and an encoder that detects a displacement of the spindle. The encoder includes a rotor and a stator. The rotor is supported by a rotor bushing. The rotor bushing includes an engaging key engageable with a key groove axially provided on the outer circumference of the spindle, and is displaceable in the axial direction of the spindle via a position adjusting screw. The stator is fixed to the body via a stator bushing in the vicinity of the spindle so as not to be displaceable in the axial direction of the spindle.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: February 1, 2011
    Assignee: Mitutoyo Corporation
    Inventors: Shuji Hayashida, Nobuyuki Hayashi, Shozaburo Tsuji, Yasuhiro Tsujimoto, Masahiko Tachikake, Yuji Fujikawa, Takashi Komori, Junji Masui
  • DIGITAL DISPLACEMENT MEASURING INSTRUMENT
    Publication number: 20100024237
    Abstract: A digital displacement measuring instrument includes a spindle screwed into a body to be axially advanced and retracted relative to the body; and an encoder that detects a displacement of the spindle. The encoder includes a rotor and a stator. The rotor is supported by a rotor bushing. The rotor bushing includes an engaging key engageable with a key groove axially provided on the outer circumference of the spindle, and is displaceable in the axial direction of the spindle via a position adjusting screw. The stator is fixed to the body via a stator bushing in the vicinity of the spindle so as not to be displaceable in the axial direction of the spindle.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 4, 2010
    Applicant: MITUTOYO CORPORATION
    Inventors: Shuji Hayashida, Nobuyuki Hayashi, Shozaburo Tsuji, Yasuhiro Tsujimoto, Masahiko Tachikake, Yuji Fujikawa, Takashi Komori, Junji Masui