Patents by Inventor Roger Haeffner

Roger Haeffner 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: 5804071
    Abstract: A rotating disc filter for separating coarse phase from a liquid mixture having carrier elements and blocking means that prevent the coarse phase from falling back into the pool of incoming liquid mixture. The capacity of the filter is increased by the prevention of the coarse phase from being filtered again and thereby occupying filter area.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: September 8, 1998
    Assignee: Nordic Water Products AB
    Inventor: Roger Haeffner
  • Patent number: 5692619
    Abstract: An apparatus for filtering suspensions is provided with rotatable annular vertical disks (4) covered with filter material and partly submerged in the suspension to be filtered. Each disc is provided with a number of cells (22) for receiving filtrate from the suspension as the disc is rotated. The cells of each disc communicate with a central filtrate chamber (7) via respective accumulation chambers (30) formed by wall means (31) in the filtrate chamber. Each accumulation chamber of each disc extends axially past the disc and has an outlet (32) which also extends axially past the disc. The advantage is that a more concentrated coarse fraction of the suspension can be achieved.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: December 2, 1997
    Assignee: Beloit Technologies, Inc.
    Inventor: Roger Haeffner