Patents by Inventor Roderich Gracff

Roderich Gracff 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).

  • Method and apparatus for controlling gas flow through granulate in drying hoppers
    Publication number: 20050091872
    Abstract: Method and apparatus for drying granulate material in a hopper by controlling the amount of gas which flows through the hopper to heat and to dry the granulate. The control allows to use a minimum amount of gas for heating the granulate to the drying temperature and to dry it with an optimal low energy consumption. This effect is reached by controlling the amount of gas flowing through the drying hopper as a function of the temperature difference between the temperature of the heating gas leaving the drying hopper and the granulate to be heated.
    Type: Application
    Filed: October 26, 2004
    Publication date: May 5, 2005
    Inventor: Roderich Gracff