Device for filtering a fluid especially for plastic-processing installations

  • US 7,419,592 B2
  • Filed: 07/18/2003
  • Issued: 09/02/2008
  • Est. Priority Date: 09/17/2002
  • Status: Active Grant
First Claim
Patent Images

1. A device-for filtering a liquefied plastic comprising:

  • a housing with at least one supply channel and a discharge channel, wherein the housing defines four housing partial channels, which are in fluid communication with the discharge channel, and two back-flush channels;

    a filter carrier moveably mounted in the housing having a first filter region and a second filter region;

    at least one filter element arranged in each of the first filter region and second filter region of the filter carrier, wherein the filter elements are perpendicularly disposed to a direction of flow through each of the first filter region and the second filter region;

    each of the first filter region and the second filter region being in fluid communication with two filter-carrier partial channels defined by the filter carrier, wherein the filter-carrier partial channels of the filter carrier are in selective fluid communication with the housing partial channels through movement of the filter carrier relative to the housing; and

    the filter carrier is selectively moveable to a position wherein the first filter region is in fluid communication with the second filter region through the filter-carrier partial channel and the housing partial channel while fluid communication between the first filter region and the supply channel and at least one of the back-flush channels is blocked.

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