Patents by Inventor Helmut Gradenegger

Helmut Gradenegger 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).

  • Patent number: 5193295
    Abstract: A system for shifting won minerals with a continuous conveyor such as a belt or chain conveyor has a machine frame and a shovel pivotably coupled to booms. The booms are aligned in a vertically pivotable manner with a rocker arm that is pivotably coupled to the front end of the machine frame. The booms and the rocker arm are connected to the front end of the machine frame by hydraulic cylinder units. The loading shovel is swivel-mounted about at least one essentially horizontal axle to dump the debris into a feed chute provided at the front end area of the continuous conveyor. The rocker arm has at least one hydraulic cylinder unit supported at the front end of the machine frame and behind the corresponding rocker arm support to provide a compact design with improved load-bearing capacity and a reduced danger of tipping.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: March 16, 1993
    Assignee: Voest-Alpine Bergtechnik Gesellschaft m.b.H.
    Inventors: Helmut Gradenegger, Eduard Krivec, Egmont Lammer
  • Patent number: 4594047
    Abstract: Apparatus for removing and conveying a heap of debris includes a continuous conveyor supported by a frame and having a charging end and a discharging end; two cantilever arms having outer free ends and having inner ends pivotally supported on the frame for swinging movement about a horizontal transverse arm pivot axis between lowered and raised positions; a transverse crossbeam extending between the outer free ends of the arms and pivoted thereto for swinging movement about a horizontal beam axis; a loading shovel having an open front for shoveling up debris and a back wall which has an upper edge, the shovel being pivoted to the crossbeam for swinging movement about a horizontal shovel pivot axis which is located near the upper edge of the back wall, the arrangement of shovel, crossbeam and arms being such that in the lowered position of the arms, the shovel pivot axis is above the beam pivot axis and the shovel is swingable to a lowered, loading position in engagement with the beam for shoveling in debris a
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: June 10, 1986
    Assignee: Voest-Alpine Aktiengesellschaft
    Inventors: Eduard Krivec, Helmut Gradenegger