Patents by Inventor Leonid Solomonovich Feifets

Leonid Solomonovich Feifets 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).

  • Positive-displacement hydraulic motor
    Patent number: 3961558
    Abstract: In a positive-displacement hydraulic motor a valve is mounted so as to be moved positively, individually and continuously during the operation of the hydraulic motor. Spacings between adjacent pairs of valve ports, variable volume chambers and cam portions of the guide element are selected from a predetermined relationships. Such an arrangement makes it possible to predetermine the mode of operation for the hydraulic motor by selecting previously the speed of the movement of the valve.
    Type: Grant
    Filed: November 19, 1974
    Date of Patent: June 8, 1976
    Inventors: Alexandr Viktorovich Dokukin, Jury Evgenievich Tyablikov, Anatoly Yakovlevich Rogov, Valerian Mikhailovich Berman, Jury Arsentievich Nikitin, Leonid Solomonovich Feifets