Patents Assigned to Pista S.A.
  • Gravity filtering equipment
    Patent number: 3984326
    Abstract: A gravity filtering equipment comprising a basin partitioned into a plurality of compartments each having a permeable bottom covered by a filtering bed and a device for flushing such filtering beds. This device comprises a bell adaptable fluid-tightly onto the upper edges of each compartment in turn and provided with a pump for sucking up filtered water, from a collecting chamber provided underneath the permeable bottom of each such compartment, through its filtering bed.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: October 5, 1976
    Assignee: Pista S.A.
    Inventor: Henry Bendel