Trapway optimization

Abstract

A trapway for a toilet includes at least a weir peak, an upleg including a first radius of curvature extending upstream of the weir peak, and a downleg including a second radius of curvature extending downstream of the weir peak. The first radius of curvature and the second radius of curvature are selected to optimize a flow of water through the trapway.

What is claimed is: 
     
         1 . A trapway for a toilet, the trapway comprising:
 a weir peak;   an upleg including a first radius of curvature extending upstream of the weir peak; and   a downleg including a second radius of curvature extending downstream of the weir peak.   
     
     
         2 . The trapway of  claim 1 , further comprising:
 an ankle including a third radius of curvature extending downstream of the downleg.   
     
     
         3 . The trapway of  claim 2 , further comprising:
 a spoon coupled to an outlet of the trapway.   
     
     
         4 . The trapway of  claim 3 , further comprising:
 a horizontal pipe extending from the ankle to the spoon.   
     
     
         5 . The trapway of  claim 4 , wherein water flowing over the weir peak contacts the downleg in one area before reaching the horizontal pipe. 
     
     
         6 . The trapway of  claim 5 , wherein the spoon includes a fourth radius of curvature. 
     
     
         7 . The trapway of  claim 4 , further comprising:
 a bowl; and   a sump coupled to the bowl, wherein distance from the sump to the spoon is less than a distance from the sump to the weir peak.   
     
     
         8 . The trapway of  claim 2 , wherein the first radius of curvature optimizes a flow of water from the weir peak to the ankle. 
     
     
         9 . The trapway of  claim 1 , wherein the upleg extends at a predetermined angle with respect to a horizontal line. 
     
     
         10 . The trapway of  claim 1 , further comprising:
 a sump jet having a predetermined size.   
     
     
         11 . The trapway of  claim 1 , wherein the first radius of curvature extending upstream of the weir peak is greater than the second radius of curvature extending downstream of the weir peak. 
     
     
         12 . A toilet, comprising:
 a bowl;   a sump coupled to the bowl;   a trapway coupled to the sump, wherein the trapway comprises:
 a weir peak; 
 an upleg including a first radius of curvature extending upstream of the weir peak; and 
 a downleg including a second radius of curvature extending downstream of the weir peak. 
   
     
     
         13 . The toilet of  claim 12 , wherein the first radius of curvature extending upstream of the weir peak is greater than the second radius of curvature extending downstream of the weir peak. 
     
     
         14 . The toilet of  claim 12 , further comprising:
 an ankle including a third radius of curvature extending downstream of the downleg.   
     
     
         15 . The toilet of  claim 14 , further comprising:
 a spoon coupled to an outlet of the trapway.   
     
     
         16 . The toilet of  claim 15 , further comprising:
 a horizontal pipe extending from the ankle to the spoon.   
     
     
         17 . The trapway of  claim 16 , wherein water flowing over the weir peak contacts the downleg in one area before reaching the horizontal pipe. 
     
     
         18 . A method comprising:
 select a first dimension for a trapway of a toilet;   measure a flow rate for the first dimension;   select a second dimension for a trapway of a toilet;   measure a flow rate for the second dimension; and   compare the flow rate for the first dimension to the flow rate for the second dimension.   
     
     
         19 . The method of  claim 18 , further comprising:
 measure a flush duration for the first dimension;   measure a flush duration for the second dimension; and   compare the flush duration for the first dimension to the flush duration for the second dimension.   
     
     
         20 . The method of  claim 18 , wherein the first dimension is a radius of curvature for an upleg of the trapway or a radius of curvature for a downleg of the trapway.