Patents by Inventor Carl S. J. Van Rensburg

Carl S. J. Van Rensburg 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).

  • Mine cooling
    Patent number: 4805415
    Abstract: A subterranean excavation such as a mine working is cooled by a refrigeration plant having a heat rejection system at an upper station and a heat absorption system in the excavation, the refrigerant medium being ammonia. The system includes a surge drum at the upper station and maybe also at the excavation. Safety measures include the location of the vapor and liquid pipes in a borehole separate from the mine shaft or shafts.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: February 21, 1989
    Assignee: General Mining Union Corporation Limited
    Inventors: Carl S. J. Van Rensburg, Johannes Van Der Walt