Patents by Inventor Boris Nikolaevich Sharapov

Boris Nikolaevich Sharapov 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).

  • Seal means for a centrifugal pump
    Patent number: 4083647
    Abstract: A pump for handling liquids laden with abrasive particles in which the seal of the shaft between the low- and high-pressure stages comprises at least two floating rings provided on the shaft in a circular gap between the shaft and the casing. The casing has a circular collar at the side of the low-pressure stage, partly covering the circular gap which is adjoined by the rings during pump operation.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: April 11, 1978
    Inventors: Viktor Arsentievich Tatkov, Nikolai Nikolaevich Letov, Boris Nikolaevich Sharapov, Vladimir Petrovich Rozhkov