Patents by Inventor Sigfred K. Nielsen

Sigfred K. Nielsen 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).

  • Flexible air supply connection in a grate cooler
    Patent number: 5584686
    Abstract: A flexible connection for supplying cooling air to a movable grate element in a grate cooler. A rigid pipe has two end sections each having a wall thickness exceeding that of the pipe. The end sections are rounded on their outer sides and are each mounted in a displaceable and tiltable manner in separate pipe sockets. One of the sockets is fixed to the movable grate element while the other is fixed to the stationary frame of the cooler.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: December 17, 1996
    Assignee: F. L. Smidth & Co. AS
    Inventor: Sigfred K. Nielsen