Patents by Inventor Torstein Sæther

Torstein Sæther 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: 7445037
    Abstract: A method and equipment for continuous or semi-continuous casting of metal, in particular directly-cooled (DC) casting of aluminum, including at least one mold (3) with a mold cavity (11) that is provided with an inlet (4) linked to a metal store and an outlet with devices (27) for cooling the metal so that an object in the form of an extended string, rod or bar is cast through the outlet. The metal is supplied to the mold (3) in such a way and with such regulation that the metallostatic pressure in the contact point (solidification zone) against the mold wall is virtually zero during casting.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: November 4, 2008
    Assignee: Norsk Hydro ASA
    Inventors: Bjarne Anders Heggset, Bjørn Vaagland, Steinar Benum, Geir Olav Ånesbug, Torstein Sæther, John Erik Hafsås
  • Publication number: 20060219378
    Abstract: A method and equipment for continuous or semi-continuous casting of metal, in particular directly-cooled (DC) casting of aluminium, including at least one mould (3) with a mould cavity (11) that is provided with an inlet (4) linked to a metal store and an outlet with devices (27) for cooling the metal so that an object in the form of an extended string, rod (25) or bar is cast through the outlet. The metal is supplied to the mould (3) in such a way and with such regulation that the metallostatic pressure in the contact point (solidification zone) against the mould wall is virtually zero during casting.
    Type: Application
    Filed: June 25, 2004
    Publication date: October 5, 2006
    Inventors: Bjarne Heggset, Bjørn Vaagland, Steinar Benum, Geir Ånesbug, Torstein Saether, John Hafsas
  • Patent number: 6513574
    Abstract: Device in connection with a water-cooling system for direct chill semi-continuous casting equipment for casting metal, in particular casting aluminium ingots (14). The solution comprises one or more chills (9) arranged in a frame structure with an integral water distribution box (18). The chill(s) comprise(s) a mould chamber surrounded by permeable wall elements (10) for the supply of oil and/or gas and is(are) open at the top with an opening (13) for the supply of molten metal and, at the start of each casting operation, is(are) closed at the bottom by means of a mobile support. The metal is cooled in two stages, by primary cooling in the mould chamber and secondary cooling by direct water cooling immediately below the primary cooling area. A separate cooling circuit called the recooling circuit is arranged to cool the chills after the end of the casting cycle. The recooling (1, 2, 3) and secondary cooling (11, 19) thus consist of two separate cooling circuits.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 4, 2003
    Assignee: Norsk Hydro ASA
    Inventors: Torstein Sæther, Leif Hektoen, Idar Kjetil Steen
  • Publication number: 20020033246
    Abstract: Device in connection with a water-cooling system for direct chill semi-continuous casting equipment for casting metal, in particular casting aluminium ingots (14). The solution comprises one or more chills (9) arranged in a frame structure with an integral water distribution box (18). The chill(s) comprise(s) a mould chamber surrounded by permeable wall elements (10) for the supply of oil and/or gas and is(are) open at the top with an opening (13) for the supply of molten metal and, at the start of each casting operation, is(are) closed at the bottom by means of a mobile support. The metal is cooled in two stages, by primary cooling in the mould chamber and secondary cooling by direct water cooling immediately below the primary cooling area. A separate cooling circuit called the recooling circuit is arranged to cool the chills after the end of the casting cycle. The recooling (1, 2, 3) and secondary cooling (11, 19) thus consist of two separate cooling circuits.
    Type: Application
    Filed: May 23, 2001
    Publication date: March 21, 2002
    Inventors: Torstein Saether, Leif Hektoen, Idar Kjetil Steen
  • Patent number: 4385751
    Abstract: A device for the discontinuous charging of molten metal into a vacuum chamber which is continuously held under vacuum includes a charging vessel or tundish on which is disposed a fixed transfer pipe so positioned that the tundish can be rotated about the axis of the pipe to such an extent that the pipe's input orifice is lifted above the surface of the metal flow in the tundish, while at the same time the pipe is withdrawn from the vacuum chamber. The chamber is sealed with a plate valve.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: May 31, 1983
    Assignee: Ardal og Sunndal Verk A/S
    Inventors: Torstein Saether, Bjarne Heggset