Patents by Inventor Mikhail I. Korabelnikov

Mikhail I. Korabelnikov 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).

  • Tapered screw joint and device for emergency recovery of boring tool from borehole with the use of said joint
    Patent number: 4304428
    Abstract: A tapered screw joint with the thread profile whose bearing side is inclined at an angle of from about 86.degree. to about 98.degree. to the plane which is perpendicular to the thread axis.Such a tapered screw joint of parts makes it possible to disconnect them rapidly and repeatedly under the effect of axial tensile loads with subsequent reconnection under the effect of an applied torque. This screw joint will be used most effectively in a device for the emergency recovery of the boring tool from a borehole.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: December 8, 1981
    Inventors: Samvel S. Grigorian, Mikhail I. Korabelnikov, Jury M. Markov, Alexandr A. Shakhnazahov, Eduard A. Akopov, Marina V. Kameneva