Patents by Inventor Andreas Brandhofer

Andreas Brandhofer 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).

  • Patent number: 6274039
    Abstract: A cartridge filter has a filter element and a frame formed of plates. The plates are installable around the filter element and are interconnectable in the area of the sides of the plates. The plates have plug-in connection members which interact with corresponding plug-in connection members of adjacent plates to thereby affix the plates to one another.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: August 14, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Andreas Brandhofer, Matthias Schuster, Hans-Joachim Lippold
  • Patent number: 6059966
    Abstract: A cartridge filter has a filter element and a frame formed of plates. The plates are installable around the filter element and are interconnectable in the area of the sides of the plates. The plates have plug-in connection members which interact with corresponding plug-in connection members of adjacent plates to thereby affix the plates to one another.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: May 9, 2000
    Assignee: Firma Carl Fredenberg
    Inventors: Andreas Brandhofer, Matthias Schuster, Hans-Joachim Lippold, Jorgen Knudsen, Margit Hofmann
  • Patent number: 6027542
    Abstract: A filter cartridge has a frame made of tough material, which sealingly surrounds an accordion fold pack on its circumferential side. The frame is made of assemblable, plate-shaped frame elements and has, on the circumferential side along the lower and/or upper edge of the frame, a tongue, the tongue being insertable in a latticed holder having a U-shaped profile. A viscous joining compound is used to affix the tongue in place. The tongue is formed by strip-shaped tongue elements, each tongue element being joined to a frame element, wherein the adjacent ends of the tongue elements are sealingly fastened to each other by connecting corner pieces.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: February 22, 2000
    Assignee: Firma Carl Freudenberg
    Inventors: Andreas Brandhofer, Thomas Schroth, Jorgen Knudsen, Wolfgang Schmidt