Patents by Inventor Jan Kovar

Jan Kovar 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 of and apparatus for feeding rod-shaped elements sequentially in spaced relationship
    Patent number: 4206623
    Abstract: Rods which are worked, for example, in a rolling mill by cross-wedge rolling are introduced into the mill by means of a second rod which is shifted forward for the length of the rod portion being worked, the second rod being subsequently returned through a distance exceeding an elongation of the worked rod during the rolling of the latter. The invention can be utilized for repeated feeding of rod-shaped elements, where a gap is required between the worked and the following supplied piece.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: June 10, 1980
    Assignee: Vyzkumny ustav tvarecich stroju a technologie tvareni
    Inventors: Jan Kovar, Jan Drkal
  • Apparatus for cross wedge rolling
    Patent number: 4186583
    Abstract: In order properly to guide a workpiece in the course of cross wedge rolling, there are provided adjustable guide means within the working space of the rolling mill, and means for transmitting a rotary motion to the workpiece prior to the start of the rolling process proper.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: February 5, 1980
    Assignee: Vyzkumny ustav tvarecich stroju a technologie tvareni
    Inventors: Jan Kovar, Jan Drkal, Jan Zalesak, Vaclav Hladky
  • Apparatus for the discharge of waste ends of bars in the cross wedge rolling process
    Patent number: 4186580
    Abstract: There is disclosed apparatus for the discharge of unworkable waste bar ends adapted for use in the cross wedge rolling process to make possible a mechanized or automated production cycle. The disclosed apparatus comprises a guide connected to a swingable element controlled by a sensor and actuated by a motor, a channel for unworkable waste ends being arranged opposite the swingable element.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: February 5, 1980
    Assignee: Vyzkumny ustav tvarecich stroju a technologie tvareni
    Inventors: Jan Zalesak, Jan Kovar
  • Apparatus for feeding workpieces for cross wedge rolling
    Patent number: 4177660
    Abstract: Workpieces for cross wedge rolling are fed first to an auxiliary trough provided with a sliding gate for removal of workpieces in case of an interruption of the operation of the rolling stand; the workpieces are fed from the auxiliary trough into a stand-by trough to be fed between the rolls of the rolling stand.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: December 11, 1979
    Assignee: Vyzkumny ustav tvarecich stroju a technologie tvareni
    Inventors: Jan Kovar, Jan Drkal