Patents Assigned to Metzeler AB
  • Filter means
    Patent number: 4274960
    Abstract: A filter apparatus for separating particles of oil from waste water comprises a housing having an inlet and an outlet and a filter element arranged therebetween. The filter element is in the form of a self-supporting body comprising small pieces of soft foamed plastic material having open cells. The foamed plastic material has been subjected to mechanical, non-disintegrating pressure shocks of a magnitude sufficient to rupture the cell walls. Thereafter the pieces are joined together under pressure by means of a bonding agent.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: June 23, 1981
    Assignee: Metzeler AB
    Inventor: Tage Abrahamsson