Recirculating filter

Abstract

A self contained filter for a recirculating tank is used in a septic system. The self contained filter is a mattress-like filter made of woven material encapsulating aggregate material therein. The weave of the mattress-like woven material is smaller than the aggregate material. In another aspect, at least one mattress-like filter is placed within a tank.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is as follows:  
     
         1 . A filter for use in a recirculating tank, comprising: 
 aggregate material; and    a mattress-like woven material encapsulating the aggregate material, a weave of the mattress-like woven material being smaller than the aggregate material thereby preventing migration of the aggregate material.    
     
     
         2 . The filter of  claim 1 , wherein the aggregate material is synthetic particles.  
     
     
         3 . The filter of  claim 2 , wherein the synthetic particles are propylene or polychloride.  
     
     
         4 . The filter of  claim 2 , wherein the synthetic particles have a specific gravity of approximately 0.9+/−3%.  
     
     
         5 . The filter of  claim 4 , wherein the synthetic particles prevent compaction of the filter.  
     
     
         6 . The filter of  claim 1 , wherein the aggregate material ranges in diameter from 0.05 nm to 1½ inches diameter.  
     
     
         7 . The filter of  claim 1 , wherein the woven material is fabric or a synthetic material.  
     
     
         8 . The filter of  claim 1 , wherein the synthetic material is propylene or ethylene clothing.  
     
     
         9 . The filter of  claim 1 , wherein only a single sized aggregate is encapsulated in the woven cloth.  
     
     
         10 . A recirculating filter system adapted for use in a septic system, comprising: 
 a tank;    at least one mattress-like filter placed within the tank, the mattress-like filter having aggregate material sealed therein.    
     
     
         11 . The recirculating filter system of  claim 10 , wherein at the at least one mattress-like filter is at least two mattress-like filters.  
     
     
         12 . The recirculating filter system of  claim 11 , wherein each of the mattress-like filters have a different sized aggregate sealed therein.  
     
     
         13 . The recirculating filter system of  claim 12 , wherein a finer sized aggregate filled mattress-like filter of the at least two mattress-like filters is placed on top of a larger sized aggregate filled mattress-like filter of the at least two mattress-like filters within the tank.  
     
     
         14 . The recirculating filter system of  claim 10 , wherein the aggregate material is synthetic particles.  
     
     
         15 . The recirculating filter system of  claim 14 , wherein the synthetic particles are propylene or polychloride.  
     
     
         16 . The recirculating filter system of  claim 14 , wherein the synthetic particles have a specific gravity of approximately 0.9+/−3%.  
     
     
         17 . The recirculating filter system of  claim 10 , wherein the at least one mattress-like filter is made from fabric or a synthetic material.  
     
     
         18 . The recirculating filter system of  claim 17 , wherein the synthetic material is propylene or ethylene clothing.  
     
     
         19 . The recirculating filter system of  claim 18 , wherein a weave of the fabric or the synthetic material is small than a diameter of the aggregate material sealed therein thus preventing migration thereof.  
     
     
         20 . The recirculating filter system of  claim 10 , wherein the tank includes troughs integrally formed in at least the bottom and sides thereof.  
     
     
         21 . The recirculating filter system of  claim 20 , further comprising a sheet placed over the troughs of the side of the tank.  
     
     
         22 . The recirculating filter system  10 , wherein the tank is a precast concrete or a synthetic material.  
     
     
         23 . The recirculating filter system of  claim 22 , wherein the tank includes a flange and ribs disposed about a periphery thereof.