초록 ▼

A biological filter for filtering a stream of falling liquid, the filter comprising a body movable between a first and a second position, and a first filter portion coupled to the body such that the first filter portion is positioned under the stream when the body is in the first position. The filte

A biological filter for filtering a stream of falling liquid, the filter comprising a body movable between a first and a second position, and a first filter portion coupled to the body such that the first filter portion is positioned under the stream when the body is in the first position. The filter further comprises a second filter portion coupled to the body such that the second filter portion is positioned under the stream when the body is in the second position, wherein the body reciprocates between the first and the second positions when located below the stream of liquid.

대표청구항 ▼

[ What is claimed is:] [1.]1. A biological filter for filtering a stream of falling liquid, the filter comprising:a body movable between a first and a second position;a first filter portion coupled to said body such that said first filter portion is positioned under said stream when said body is in

[ What is claimed is:] [1.]1. A biological filter for filtering a stream of falling liquid, the filter comprising:a body movable between a first and a second position;a first filter portion coupled to said body such that said first filter portion is positioned under said stream when said body is in said first position; anda second filter portion coupled to said body such that said second filter portion is positioned under said stream when said body is in said second position;and wherein said body rocks between said first and said second positions when located below said stream of liquid. [41.]41. A method for filtering a stream of falling liquid, the method comprising the steps of:selecting a filter having a first filter portion and a second filter portion, said filter being movable between a first position wherein said first filter portion is positioned under said stream and a second position wherein said second filter portion is positioned under said stream; andcausing said stream of liquid to impinge upon said filter such that each filter portion alternatingly absorbs and drains at least a portion of said stream of liquid to cause said body to reciprocate between said first and said second positions.