Drain fitting

Abstract

A drain fitting comprising a cage having a plurality of apertures extending through the cage; a conduit having an inlet and an outlet, the conduit extending at least partially through the cage; and a base cap attached to the cage, the outlet located within the base cap wherein the conduit includes an internal surface that extends from the inlet to the outlet, the internal surface increasing the velocity of the water substantially the length of the internal surface as the water passes from the inlet to the outlet.

1 . A drain fitting comprising:
 a cage having a plurality of apertures extending through the cage;   a conduit having an inlet and an outlet, the conduit extending at least partially through the cage; and   a base cap attached to the cage, the outlet located within the base cap;   wherein the conduit includes an internal surface that extends from the inlet to the outlet, the internal surface increasing the velocity of the water substantially the length of the internal surface as the water passes from the inlet to the outlet.   
   
   
       2 . The drain fitting of  claim 1  wherein the cage is a tube. 
   
   
       3 . The drain fitting of  claim 2  wherein the tube is typically cylindrical in shape. 
   
   
       4 . The drain fitting of  claim 1  wherein a surface area of the apertures is normally larger than a surface area of the remainder of the cage. 
   
   
       5 . The drain fitting of  claim 1  wherein the conduit is a funnel. 
   
   
       6 . The drain fitting of  claim 1  wherein the internal surface is in the form of a number of internal walls. 
   
   
       7 . The drain fitting of  claim 6  wherein the internal walls are inclined. 
   
   
       8 . The drain fitting of  claim 7  wherein the internal walls are inclined at an angle of at least 30 degrees. 
   
   
       9 . The drain fitting of  claim 7  wherein the internal walls are inclined at an angle of at least 45 degrees. 
   
   
       10 . The drain fitting of  claim 7  the internal walls are inclined at an angle of at least 60 degrees. 
   
   
       11 . The drain fitting of  claim 1  wherein the base cap includes an arcuate floor. 
   
   
       12 . The drain fitting of  claim 12  wherein the base cap includes a stem which extends upwardly from the floor. 
   
   
       13 . The drain fitting of  claim 6  wherein the funnel has an upper portion and a lower portion. 
   
   
       14 . The drain fitting of  claim 13  wherein an internal wall of the upper portion is preferably between 50 degrees and 70 degrees. 
   
   
       15 . The drain fitting of  claim 13  wherein the internal wall of the upper portion is between 55 degrees and 65 degrees. 
   
   
       16 . The drain fitting of  claim 13  wherein internal wall of the upper portion upper portion is between 57.5 degrees and 62.5 degrees. 
   
   
       17 . The drain fitting of  claim 13  wherein an internal wall of the lower portion is preferably at least 75 degrees. 
   
   
       18 . The drain fitting of  claim 13  wherein the internal wall of the lower portion is between at least 80 degrees. 
   
   
       19 . The drain fitting of  claim 13  wherein internal wall of the upper portion upper portion is at least 82.5 degrees.