Patents by Inventor Mikhail F. Vorobei

Mikhail F. Vorobei 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).

  • Patent number: 4383786
    Abstract: An apparatus comprises a body having V-shaped two-arm levers mounted thereon. Around the periphery of the body there are mounted cutting tool holders pivoted each to one arm of each of the levers. Secured to the body are drives for turning the levers and each connected with the other arm of each of the levers. On the front and rear ends of the cutting tool holders there are mounted rollers in contact with the inside surface of the pipe. Rigidly attached to the cutting tool holders are cutting tools.
    Type: Grant
    Filed: October 21, 1980
    Date of Patent: May 17, 1983
    Inventors: Boris E. Paton, Vladimir K. Lebedev, Sergei I. Kuchuk-Yatsenko, Vasily A. Sakharnov, Boris A. Galian, Grigory B. Asoiants, Mikhail F. Vorobei, Sergei A. Solodovnikov