Patents by Inventor Nikolai T. Privalov

Nikolai T. Privalov 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).

  • Method for overhead submerged arc welding and apparatus to implement the same
    Patent number: 5070225
    Abstract: The invention relates to technology and equipment for arc welding.A method of overhead submerged arc welding consists in that flux at the wing site is pressure-fed to the joint being welded from below at different pressures along the joint being welded, a consumable electrode (3) is fed through the flux (3) from below and an arc is struck. A weldpool is formed thereat with a layer of liquid slag.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: December 3, 1991
    Assignee: Institut Elekctrosvarki Imeni E. O. Patona Akademii Mauk Ukrainskoi SSR
    Inventors: Boris E. Paton, Vladimir V. Podgaetsky, Pavel A. Varenchuk, Nikolai T. Privalov, Vladimir I. Galinich, Valentin D. Kovalev, Yaroslav A. Romanenko
  • Apparatus for overhead submerged-arc welding
    Patent number: 5004885
    Abstract: An apparatus for overhead submerged-arc welding a hopper containing flux and accommodating a bowl having means for supplying flux and its pressing and having its open upper part facing towards a work being welded, a rear wall of the bowl in the welding direction being made in the form of a movable plate supported by a pivot pin extending perpendicularly with respect to its surface. Adjacent to a movable plate in the bowl is mounted a welding nozzle for supplying a consumable electrode and a forming means is provided above the brim of the open part of the bowl on a suspension supported by a pivot pin for cooperation with the movable plate and for oscillations in the longitudinal and transverse planes, and the hopper is suspended on the pivot pin of the suspension of the forming means. The pivot pin supporting the movable plate is mounted on a means for pressing an upper end face of the movable plate against the front end extremity of the underside of the forming means.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: April 2, 1991
    Inventors: Konstantin A. Juschenko, Pavel A. Varenchuk, Valentin D. Kovalev, Anatoly I. Chvertko, Nikolai T. Privalov, Vladimir G. Kuzmenko
  • Apparatus for overhead submerged-arc welding
    Patent number: 4994645
    Abstract: An apparatus for overhead submerged arc welding having a pivotally mounted hopper containing flux and accommodating a bowl which has its open part facing towards a work being welded and communicating with a driven auger feeder for supplying and pressing the flux in the bowl and having a controlled drive. A welding nozzle extends through the bowl, and a former is provided above the brim of the open part of the bowl. A flux backing thickness pickup is connected to the controlled drive of the driven auger feeder for varying the number of revolutions of an auger of the driven auger feeder during a preset time period. The flux backing thickness pickup is mounted on a front edge of the bowl in the welding direction, adjacent to the longitudinal axis thereof, and is in the form of any eddy current transducer. By controlling the driven auger feeder, the apparatus monitors and keeps constant the preset flux backing thickness so as to supply a constant amount of flux to the bowl.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: February 19, 1991
    Inventors: Pavel A. Varenchuk, Valentin D. Kovalev, Mikhail M. Ivanenko, Nikolai T. Privalov, Vladimir I. Galinich, Anatoly V. Zalevsky, Georgy L. Atamanchuk