Extended area filter basket assembly

Abstract

A filter assembly including a filter vessel having an inlet and an outlet and defining a filter chamber therebetween. A basket assembly is removably supported within the filter chamber. The basket assembly has a diameter less than the diameter of the filter chamber so as to define an annular flow passage about the basket assembly. The basket assembly includes an outer permeable member and an inner permeable member having a diameter which is less than the diameter of the outer permeable member such that the inner permeable member is received within the outer permeable member so as to define an annular space therebetween and an inner flow path. The inner permeable member includes a permeable rigid closed end. The basket assembly is capable of supporting a bag type filter having at least one closed end such that it may be supported over both the inner and outer permeable members bounding the annular space therebetween. More specifically, the closed end of the bag type filter may be supported by the corresponding permeable rigid closed end of the inner permeable members.

I claim:  
     
         1 . A filter assembly comprising: 
 a filter vessel having an inlet, an outlet and defining a filter chamber therebetween;    a basket assembly removably supported within said filter chamber and having a diameter less than the diameter of said filter chamber so as to define an annular flow passage about said basket assembly;    said basket assembly including an outer permeable member and an inner permeable member having a diameter which is less than the diameter of said outer permeable member such that said inner permeable member is received within said outer permeable member so as to define an annular space therebetween and an inner flow path, said inner permeable member also including a permeable rigid closed end;    said basket assembly being capable of supporting a bag type filter having at least one closed end such that the bag type filter may be supported over both said inner and outer permeable members bounding said annular space therebetween and the closed end of the bag type filter may be supported by said corresponding permeable rigid closed end of said inner permeable member.    
     
     
         2 . A filter assembly as set forth in  claim 1  wherein said outer permeable member defines a pair of opposed, open ends, said inner member including a flange located at the open end of said inner permeable member opposite said rigid closed end, said flange adapted to be connected to at least one of said pair of open ends of said outer permeable member.  
     
     
         3 . A filter assembly as set forth in  claim 2  wherein said filter vessel includes a peripheral flange extending radially inward from the inner side wall of said filter chamber, the other of said pair of open ends of said outer permeable member is adapted to be received and supported by said peripheral flange.  
     
     
         4 . A filter assembly as set forth in  claim 1  wherein said rigid closed end of said inner permeable member has an arcuate shape that is adapted to support the closed end of the bag type filter.  
     
     
         5 . A filter assembly as set forth in  claim 1  wherein said inner and outer permeable members are made of a permeable material which allows fluid to pass therethrough but which is structurally capable of supporting said bag-type filter.  
     
     
         6 . A filter assembly as set forth in  claim 5  wherein said inner and outer permeable members are made of a 304 grade passivated stainless steel.  
     
     
         7 . A filter assembly as set forth in  claim 1  wherein said assembly includes a carriage used to mount the bag-type filter relative to said inner and outer permeable members.  
     
     
         8 . A filter assembly as set forth in  claim 7  wherein said carriage includes a pair of opposed open ends with a plurality of annularly spaced rods extending therebetween so as to define an elongated hollow cylinder having an inner diameter and an outer diameter.  
     
     
         9 . A basket assembly adapted to be removably supported within a chamber of a filter vessel, said basket assembly comprising: 
 an outer permeable member and an inner permeable member having a diameter which is less than the diameter of said outer permeable member such that said inner permeable member is received within said outer permeable member so as to define an annular space therebetween and an inner flow path, said inner permeable member also including a permeable rigid closed end;    said basket assembly being capable of supporting a bag type filter having at least one closed end such that the bag type filter may be supported over both said inner and outer permeable members bounding said annular space therebetween and the closed end of the bag type filter may be supported by said corresponding permeable rigid closed end of said inner permeable member.    
     
     
         10 . A basket assembly as set forth in  claim 9  wherein said outer permeable member defines a pair of opposed, open ends, said inner member including a flange located at the open end of said inner permeable member opposite said rigid closed end, said flange adapted to be connected to at least one of said pair of open ends of said outer permeable member.  
     
     
         11 . A basket assembly as set forth in  claim 9  wherein said rigid closed end of said inner permeable member has an arcuate shape that is adapted to support the closed end of the bag type filter.  
     
     
         12 . A basket assembly as set forth in  claim 10  wherein said inner and outer permeable members are made of a permeable material which allows fluid to pass therethrough but which is structurally capable of supporting said bag-type filter.  
     
     
         13 . A basket assembly as set forth in  claim 12  wherein said inner and outer permeable members are made of a 304 grade passivated stainless steel.