Dual-trap toilet having improved trapway and improved connecting tube interface

Abstract

A toilet assembly may comprise a toilet tank to hold flush water, a flush valve assembly positioned in the toilet tank, a toilet deck, a toilet bowl, a trapway in flow communication with the toilet bowl, a container positioned in the toilet tank, and a connecting tube extending from an interior of the container to the trapway. A first gasket positioned between the toilet tank and the toilet deck may form a seal around the flush valve assembly. A second gasket positioned between the toilet tank and the toilet deck may form a seal around the connecting tube. The first gasket may comprise a recess for receiving the flush valve assembly and a protrusion extending into the toilet deck.

1 . A toilet assembly, comprising:
 a toilet tank to hold flush water;   a flush valve assembly positioned in the toilet tank;   a toilet deck;   a toilet bowl;   a trapway in flow communication with the toilet bowl;   a container positioned in the toilet tank, and   a connecting tube extending from an interior of the container to the trapway,   a first gasket positioned between the toilet tank and the toilet deck and forming a seal around the flush valve assembly; and   a second gasket positioned between the toilet tank and the toilet deck and forming a seal around the connecting tube;   wherein:
 the container is in flow communication with the toilet tank, the container having an open lower end and a closed upper end, 
 the trapway comprises a sump trap, a first upstream weir, a lower trap, and a second downstream weir, 
 the connecting tube is coupled to the trapway at a position between the sump trap and the lower trap, and provides flow communication between the container and the trapway. 
   
     
     
         2 . The toilet assembly of  claim 1 , wherein the first gasket comprises a recess receiving the flush valve assembly. 
     
     
         3 . The toilet assembly of  claim 1 , wherein the first gasket comprises a protrusion extending into the toilet deck. 
     
     
         4 . The toilet assembly of  claim 3 , wherein the first gasket comprises a collar portion having a wider diameter than an outer diameter of the protrusion. 
     
     
         5 . The toilet assembly of  claim 1 , wherein the second gasket comprises a recess receiving the connecting tube. 
     
     
         6 . The toilet assembly of  claim 1 , wherein the second gasket comprises a protrusion extending into the toilet deck. 
     
     
         7 . The toilet assembly of  claim 6 , wherein the second gasket comprises a collar portion having a wider diameter than an outer diameter of the protrusion. 
     
     
         8 . The toilet assembly of  claim 1 , wherein, between flush cycles, the container comprises pressurized air positioned above flush water. 
     
     
         9 . The toilet assembly of  claim 1 , wherein, upon discharging water into a flush valve core to initiate a flush cycle, reduced pressure is created in pressurized air in the trapway. 
     
     
         10 . The toilet assembly of  claim 1 , wherein, upon re-filling the toilet tank with water to end a flush cycle, increased pressure is created in pressurized air in the trapway. 
     
     
         11 . The toilet assembly of  claim 1 , wherein the flush valve assembly comprises a valve body extending from a valve inlet to a valve outlet and a valve cover having a seal to enclose the valve inlet. 
     
     
         12 . The toilet assembly of  claim 1 , wherein the container comprises a continuous side wall, an upper end wall, and an inner wall that together bound a vacuum chamber of the container. 
     
     
         13 . The toilet assembly of  claim 12 , wherein the inner wall bounds an inner chamber of the container. 
     
     
         14 . The toilet assembly of  claim 1 , wherein the second gasket comprises a face seal. 
     
     
         15 . The toilet assembly of  claim 1 , wherein the second gasket comprises a piston seal. 
     
     
         16 . A toilet assembly, comprising
 a toilet tank to hold flush water;   a flush valve assembly positioned in the toilet tank;   a toilet deck;   a toilet bowl;   a trapway in flow communication with the toilet bowl;   a container positioned in the toilet tank, and   a connecting tube extending from an interior of the container to the trapway,   a first gasket positioned between the toilet tank and the toilet deck and forming a seal around the flush valve assembly, wherein the first gasket comprises a recess receiving the flush valve assembly and a protrusion extending into the toilet deck; and   wherein:
 the container is in flow communication with the toilet tank, the container having an open lower end and a closed upper end, 
 the trapway comprises a sump trap, a first upstream weir, a lower trap, and a second downstream weir, 
 the connecting tube is coupled to the trapway at a position between the sump trap and the lower trap, and provides flow communication between the container and the trapway. 
   
     
     
         17 . The toilet assembly of  claim 16 , wherein the first gasket comprises a collar portion having a wider diameter than an outer diameter of the protrusion. 
     
     
         18 . The toilet assembly of  claim 16 , wherein an outer diameter of the protrusion of the first gasket is wider than an inner diameter of the recess of the first gasket. 
     
     
         19 . The toilet assembly of  claim 16 , comprising a second gasket positioned between the toilet tank and the toilet deck and forming a seal around the connecting tube, wherein the second gasket comprises a recess receiving the connecting tube and a protrusion extending into the toilet deck. 
     
     
         20 . The toilet assembly of  claim 19 , wherein the second gasket comprises a collar portion having a wider diameter than an outer diameter of the protrusion of the second gasket. 
     
     
         21 . The toilet assembly of  claim 19 , wherein an outer diameter of the protrusion of the second gasket is wider than an inner diameter of the recess of the second gasket. 
     
     
         22 . The toilet assembly of  claim 19 , wherein the second gasket comprises a face seal. 
     
     
         23 . The toilet assembly of  claim 19 , wherein the second gasket comprises a piston seal.