Patents by Inventor Hans Rohrbach, deceased

Hans Rohrbach, deceased 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).

  • Vertical impact mill for the reduction of four micron finest powder
    Patent number: 4087052
    Abstract: Vertical impact mill for production of very fine powders from larger nut-size pieces of coal, the mill including a series of horizontal impact wheels formed of wheel halves which connected together form an integral shaft-wheel system, the diameter of the impact wheels increasing from top to bottom of the mill, with an inlet at the top of the mill and successive chambers, each housing one impact wheel, and connected by connecting conduits offset from each other by 180.degree.. The mill is designed for use with an inert gas to entrain the powder through and from the mill.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: May 2, 1978
    Assignee: Ilok Power Co., Inc.
    Inventor: Hans Rohrbach, deceased
  • Process and equipment for the production of ultrafine powders particularly of coal powders with the help of a continuous cold warm influence on the ground material
    Patent number: 3991943
    Abstract: A process is disclosed for conversion of coal powder of 4 micron size into a finer powder of the order of 1/400 micron by passing through a vertical tube of sufficient length at a temperature of -77.degree. C and thereafter passing through a second chamber by force of gravity where a counter stream of heated nitrogen at 780.degree. C causes the powder to break up into the smaller size particles.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: November 16, 1976
    Assignee: Ilok Powder Company, Inc.
    Inventor: Hans Rohrbach, deceased