Patents by Inventor Stig Ferm

Stig Ferm 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).

  • Apparatus for starting turbine plants
    Patent number: 4058973
    Abstract: An apparatus for starting a turbine plant includes tubing or conduits for directing compressed air to the compressor stage of the turbine plant, whereby the turbine plant may be rotated to a speed sufficient for starting. Arranged in parallel with the compressed air tubing or conduits are additional conduits for conveying dry air to the turbine plant during rest or shutdown periods when the turbine plant is inoperative. A valving arrangement permits selective flow of compressed air through the apparatus for starting the turbine plant or of dry air for maintaining desired conditions within the turbine plant during rest or shutdown conditions.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: November 22, 1977
    Assignee: Stal-Laval Turbin AB
    Inventors: Stig Ferm, Ragnar Torstenfelt