Patents by Inventor Valentina V. Gavrilova

Valentina V. Gavrilova 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).

  • Hydraulic drilling machine
    Patent number: 5010963
    Abstract: A hydraulic drilling machine comprises a drill tool (1) connected to a hydraulic motor (3), a hydraulic percussive mechanism (4) connected via a hydraulic distributor (15) to a hydraulic pressure line (11) and to a hydraulic discharge line (21), and a means (16) for sucking the liquid from the working chamber of the hydraulic percussive mechanism (4) during its idle stroke. The means (16) includes a mixing chamber (17) connected to the discharge line of the hydraulic percussive mechanism, an ejector (18) connected to the discharge line of the hydraulic motor (3), and a diffuser (19) connected to the hydraulic discharge line (21) and accommodating a nozzle of the ejector (18).
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: April 30, 1991
    Inventors: Jury I. Neroznikov, Ivan P. Rudakov, Valentin N. Fanshtein, Vladimir A. Medyanik, Valentina V. Gavrilova