Patents by Inventor Helmut Hausmann

Helmut Hausmann 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).

  • Process for hot briqueting granular sponge iron
    Patent number: 6074456
    Abstract: The granular sponge iron is supplied to a roller press at temperatures of 600 to 850.degree. C. for molding the hot briquets. There is produced a strip structure of sponge iron containing formed hot briquets, which are arranged at a distance from each other. By smashing the strip structure, the hot briquets are separated from each other, so that fragments of the strip structure are obtained. The hot briquets and at least part of the fragments are cooled to temperatures in the range from 20 to 400.degree. C., and the cooled briquets and fragments are passed through a rotary drum. In the rotary drum, fine-grained fines of the briquets and fragments are produced. Subsequently, these fines are separated from the briquets and fragments, as they exhibit a pyrophoric behavior.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: June 13, 2000
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Jochen Freytag, Helmut Hausmann, Martin Hirsch, Siegfried Schimo, Michael Stroder, Peter Weber