Patents by Inventor Hitomi Nakai

Hitomi Nakai 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).

  • Vibrating cutting tool
    Patent number: 5271301
    Abstract: A vibrating cutting tool capable of making uniform micro-vibrations at the cutter edge generated during machining. The vibrations at the cutter edge are transmitted to balls biassed by springs, compressing the springs. The vibrations are transmitted from the balls through the output shaft back to the cutter edge. While the cutting force is small, the amplitude of vibration of balls is relatively large. When it increases, the holder acts on the balls more than the spring does so that vibration is suppressed. As a result, the amplitude of vibration becomes uniform.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: December 21, 1993
    Assignee: Nippon Pneumatic Manufacturing Co., Ltd.
    Inventors: Masaaki Hiraoka, Yasuo Umemura, Osamu Date, Tsutomu Aoki, Fukuo Wakano, Hitomi Nakai