Patents by Inventor Takasi Sanpei

Takasi Sanpei 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).

  • Instrument for measuring a length
    Patent number: 4420887
    Abstract: A micrometer wherein a rotary knob and a pinion are threadably coupled to each other, further, a resilient member for functioning as a constant pressure is interposed between the rotary knob and the pinion, and, when the rotary knob is rotated by a value of distortion of the resilient member after a spindle having a rack meshed with the pinion is abutted against a workpiece to be measured and stopped, the rotary knob is moved in a direction of the rotary shaft thereof, whereby a portion of the rotary knob is abutted against a main frame, thereby acting as a locking function.
    Type: Grant
    Filed: July 13, 1982
    Date of Patent: December 20, 1983
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Hideo Sakata, Ichiro Mizuno, Masao Nakahara, Takasi Sanpei
  • Micrometer
    Patent number: D273664
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: May 1, 1984
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Hideo Sakata, Ichiro Mizuno, Masao Nakahara, Takasi Sanpei
  • Micrometer
    Patent number: D274413
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: June 26, 1984
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Hideo Sakata, Ichiro Mizuno, Masao Nakahara, Takasi Sanpei