Patents by Inventor Leif Hektoen

Leif Hektoen 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: 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