Patents by Inventor Hans K. Rothfuss

Hans K. Rothfuss 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).

  • Crack resistant valve plate for a slide gate valve
    Patent number: 6814268
    Abstract: The invention relates to a refractory plate (1) for a slide gate valve, having a pouring hole (3), circumscribed by a circle C of center (4), at least a portion of the edges (15, 16, 17, 18) of the plate (1) are angularly oriented so as to focus the clamping forces optimally in the throttling area and around the pouring hole.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: November 9, 2004
    Assignee: Vesuvius Crucible Company
    Inventors: Hans K. Rothfuss, Vincent Boisdequin
  • Crack resistant valve plate for a slide gate valve
    Publication number: 20020189676
    Abstract: The invention relates to a refractory plate (1) for a slide gate valve, having a pouring hole (3), circumscribed by a circle C of center (4), at least a portion of the edges (15, 16, 17, 18) of the plate (1) are angularly oriented so as to focus the clamping forces optimally in the throttling area and around the pouring hole.
    Type: Application
    Filed: June 10, 2002
    Publication date: December 19, 2002
    Inventors: Hans K. Rothfuss, Vincent Boisdequin