Vacuum double drum filter

  • US 4,376,704 A
  • Filed: 03/19/1981
  • Issued: 03/15/1983
  • Est. Priority Date: 03/20/1980
  • Status: Expired due to Fees
First Claim
Patent Images

1. A vacuum double drum filter comprising in combination:

  • a pair of parallel porous rotational filter drums in close running relationship forming an upwardly facing working gap between them for receiving material to be filtered;

    means for delivering material to said working gap;

    vacuum extraction tubes within each drum for carrying away filtrate, said tubes having inner ends for discharging to a vacuum source through a central head of each drum and said inner end being located radially displaced from the center of the respective drum so that the tubes are angled in the direction of drum rotation; and

    wedge shaped collecting pockets tapered gradually and uniformly from an outer opening to an inner opening with the outer opening against the inner surface of the drums facing the material in the working gap and leading radially inwardly to the inner opening connecting to said tubes,said pockets extending at an angle to a radial line from each drum center to the location of the open opening to be angled in the direction of rotation of each drum.

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