Patents by Inventor Dietmar Baumhof

Dietmar Baumhof 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).

  • Multilayer tube formed of profiled strip
    Patent number: 6488052
    Abstract: A tube made of profiled strip has an inner edge, an outer edge parallel to the inner edge and projecting away from the inner edge, a double-thickness outwardly directed inner lip forming between the edges an outwardly open inner slot, and a double-thickness inwardly directed outer lip forming between the inner slot and the outer edge an inwardly open outer slot. The strip is formed into turns centered on an axis with the inner slot of each turn axially slidably receiving the outer lip of the adjacent turn on an inner side and the outer slot of each turn axially slidably receiving the inner lip of the adjacent turn on an outer side.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: December 3, 2002
    Assignee: Westfalia Metallformtechnik GmbH & Co.
    Inventors: Günter Hupertz, Dietmar Baumhof
  • Multilayer tube formed of profiled strip
    Publication number: 20020148522
    Abstract: A tube made of profiled strip has an inner edge, an outer edge parallel to the inner edge and projecting away from the inner edge, a double-thickness outwardly directed inner lip forming between the edges an outwardly open inner slot, and a double-thickness inwardly directed outer lip forming between the inner slot and the outer edge an inwardly open outer slot. The strip is formed into turns centered on an axis with the inner slot of each turn axially slidably receiving the outer lip of the adjacent turn on an inner side and the outer slot of each turn axially slidably receiving the inner lip of the adjacent turn on an outer side.
    Type: Application
    Filed: March 18, 2002
    Publication date: October 17, 2002
    Applicant: Westfalia Metallformtechnik GmbH & Co.
    Inventors: Gunter Hupertz, Dietmar Baumhof