Patents by Inventor Vidar Sjoberg

Vidar Sjoberg 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: 5400931
    Abstract: A metering device for metal comprises a pump house (1) submerged in liquid metal in a container (6) with a supply device (4) for gas, an inlet (8,9) for the supply of liquid metal from the container (6) and an outlet pipe (5) designed as a siphon. The outlet end of this pipe is located at the same level as the level of the metal inside the crucible and the inlet end is fitted with a valve (13). It is preferable to use an outlet pipe designed with one part above the level of the metal in the crucible and one part below the level of the metal in the crucible. The pump house metal intake can be in the form of a valve or a riser pipe. It is preferable to use a valve in the form of a loose ball.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: March 28, 1995
    Assignee: Norsk Hydro a.s
    Inventors: Olay Holta, Oystein Solli, Vidar Sjoberg