Patents by Inventor Vladimir I. Dolberg

Vladimir I. Dolberg 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).

  • Device for automatically cutting off damaged branches of pneumatic and hydraulic systems
    Patent number: 4265269
    Abstract: The device has a casing with an inlet chamber and outlet chambers communicating with one another through a passage in which is loosely mounted a pilot valve having a piston rod with pistons secured at the ends thereof and defining with the casing shut-off valves of the outlet chambers. According to the invention, the pilot valve has at least one additional piston with a cross-sectional area which is smaller than the cross-sectional area of each of said pistons, the additional piston defining a throttle between the inlet chamber and an outlet chamber in the direction of displacement of the pilot valve, one of said pistons defining a throttle between the inlet chamber and the outlet chamber opposite to the displacement of the pilot valve.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: May 5, 1981
    Inventors: Vladimir I. Dolberg, Igor V. Yarovoi, Mikhail I. Dronin