Patents Assigned to AVK Filtertechnik GmbH
  • Filter arrangement with pleat distance piece
    Patent number: 4874517
    Abstract: A filter arrangement is suggested where the filter means (38) is placed between distance pieces (48, 50, 52). In order that the longitudinal edges (64, 66, 68) of the preferably zigzag-folded distance pieces cannot cause any damage to the filter means, they are provided with a substantially edgeless cap (90, 92, 94), of which the maximum width equals that of the distance pieces.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: October 17, 1989
    Assignee: AVK Filtertechnik GmbH
    Inventor: Hans W. Esch