Liquid purification or separation – With repair or assembling means – Hoist or handle means
Patent
1993-07-30
1995-09-26
Lithgow, Thomas M.
Liquid purification or separation
With repair or assembling means
Hoist or handle means
210413, 210473, 210474, 21049701, 99297, 99302P, 99317, 99318, 99322, B01D 3502, A47G 1916, A47J 3120
Patent
active
054531896
ABSTRACT:
A filter insert for containers, such as tea pots, where a specific dwelling time is required for the filter pulp in the liquid held in the container, the insert consisting of a circular cylindrical filter unit, extending downwards from the top of the container at to least below the surface of the liquid in the container when being filled, and where at least one plunger shaft with a plunger sliding in a plunger guide extends axially through the upper part of the insert. The plunger is provided with a rim flange and can be moved to the bottom of the filter insert which is divided in at least two sections, a bottom part and a top part where the bottom part consists of a material, for instance plastic, which is impermeable to the liquid, and the top part mainly consists of a material permeable to the liquid, for instance a wire screen which can keep the filter pulp, and where the plunger also is impermeable and vaulted upwards, so that the central height is greater than the height at the circumference which is provided with an upright rim flange.
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