Filter insert for containers

  • US 5,453,189 A
  • Filed: 07/30/1993
  • Issued: 09/26/1995
  • Est. Priority Date: 02/01/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A filter insert for a liquid container where a specific dwelling time is to be maintained for filter pulp in said liquid, said insert is adapted to be inserted into said container, said inset being divided into an upper part for holding said filter pulp connected to a bottom part,said upper part comprising a downward extending cylindrical filter unit adapted to extend below the surface of said liquid, said filter insert further comprising a plunger attached to a plunger shaft, said plunger shaft being slidably disposed in a plunger and said plunger being slideably mounted in said cylindrical filter unit, said plunger shaft extends axially through the plunger shaft guide in said upper part of said insert, said plunger being provided with a circumferential rim flange and said plunger with said rim flange can be moved to the bottom part of the filter insert, said bottom part of the filter insert and said plunger being impermeable to said liquid and said upper part of the filter insert comprising the filter unit being permeable to said liquid, said plunger being centrally valted upward so that its central height is greater than the height of said circumferential rim flange.

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