Odor-free toilet

Abstract

An odor extracting system for a toilet bowl of a toilet pedestal, coupleable to a water supply via a flush conduit leading to flush outlets under a rim of the bowl; the bowl being coupleable to a sewage pipe via a U shaped trap; the odor extracting system comprising: an air bypass extending substantially through the pedestal, the air bypass for bypassing the U shaped trap, that is coupled to air intake ports around the toilet bowl, and to the sewage pipe downstream of the U shaped trap; an air pump for pumping air and vapors out of toilet bowl to sewage pipe via the air bypass, and a light weight air valve upstream of the air pump, the air valve to seal the air bypass when said pump is not in use to prevent escape of smells from the sewage pipe to the toilet bowl; said system further comprising a sealing lid coupled to the toilet pedestal, allowing access to the air valve and air pump, whilst preventing escape of odors from the bypass.

1 . An odor extracting system for a toilet bowl of a toilet pedestal, coupleable to a water supply via a flush conduit leading to flush outlets under a rim of the bowl; the bowl being coupleable to a sewage pipe via a U shaped trap; the odor extracting system comprising: an air bypass extending substantially through the pedestal, the air bypass for bypassing the U shaped trap, that is coupled to air intake ports around the toilet bowl, and to the sewage pipe downstream of the U shaped trap; an air pump for pumping air and vapors out of toilet bowl to sewage pipe via the air bypass, and a light weight air valve upstream of the air pump, the air valve to seal the air bypass when said pump is not in use to prevent escape of smells from the sewage pipe to the toilet bowl; said system further comprising a sealing lid coupled to the toilet pedestal, allowing access to the air valve and air pump, whilst preventing escape of odors from the bypass. 
   
   
       2 . The odor extracting system of  claim 1 , the air intake ports being either:
 a. incorporated into a seat of the toilet for sucking air and odors from vicinity of said seat to said sewage main;   b. additional apertures around the rim of the toilet bowl, separate and distinct from the flush outlets, and   c. the flush outlets under the rim of the toilet bowl.   
   
   
       3 . The odor extracting system of  claim 1 , further comprising:
 a. a water valve in air bypass, the water valve upstream of air valve, the water valve to prevent water from flush conduit from flowing throughout the air bypass on flushing the toilet;   b. the water valve within the air bypass comprising either:
 (i) a flap, or 
 (ii) a ball valve. 
   
   
   
       4 . The odor extracting system of  claim 1 , the air pump comprising a rotary fan. 
   
   
       5 . The odor extracting system of  claim 1 , the air valve comprising a leaf flap that is displaceable by suction of the air pump when said air pump is operated, and which sealingly closes said air bypass when air pump is not operating. 
   
   
       6 . The odor extracting system of  claim 1 , the toilet comprising a rear extension extending behind the bowl and housing the flush conduit, and the air bypass comprising:
 a. the flush conduit;   b. a first duct with apertures in the roof of the flush conduit and in a block;   c. the block situated in the rear extension;   d. a water valve above said first duct for sealing the first duct when flushing the toilet;   e. a second duct with apertures in the sewage pipe downstream of the U shaped trap, and in the block;   f. the air pump downstream of the water valve, and   g. the light air valve, situated between the water valve and the air pump.   
   
   
       7 . The odor extracting system of  claim 1 , further comprising ports provided through the rear extension, and a cover plate being provided with a gasket and being bolted to the rear extension to provide water and air-tight seal. 
   
   
       8 . The odor extracting system of  claim 1 , the toilet comprising a rear extension extending behind the bowl, and the air bypass comprising:
 a. a first duct with apertures in the toilet rim and in a block;   b. the block in the rear extension;   c. A second duct with apertures in the sewage pipe downstream of the U shaped trap, and in the block;   d. the air pump downstream of the water valve, and   e. the light air valve, situated between the water valve and the air pump.   
   
   
       9 . The odor extracting system of  claim 1 , the air bypass comprising:
 a. vents around a hollow toilet seat, the seat coupled to the toilet pedestal via a hinge;   b. a vent in the hinge;   c. the light air valve comprising a normally closed air valve, coupled to the vent in the hinge, for preventing sewage vapors from sewage main flowing out of toilet seat, and   d. the air pump downstream of said normally closed air valve.   
   
   
       10 . The odor extracting system of  claim 3 , the water valve and air valve being comprised as a single unit. 
   
   
       11 . The odor extracting system of  claim 1 , the air pump being coupled to a light switch so that switching on a light in the vicinity of toilet activates the air pump. 
   
   
       12 . The odor extracting system of  claim 1  being coupled to a sensor and activated by use of the toilet. 
   
   
       13 . The odor extracting system of  claim 1  being coupled to an extractor fan for extracting fumes from the toilet cubicle. 
   
   
       14 . A toilet pedestal comprising a toilet bowl with a rim having flush outlets thereunder that are coupled to a flush conduit extending through a rear extension of the pedestal; the toilet bowl having an exit thereout, coupled to a first section of a sewage pipe via a U shaped trap; and further comprising an air bypass coupling the flush conduit to the first section of a sewage pipe, the air bypass comprising an electrically powered air pump for pumping air, gases, odors and airborne species from the flush conduit to the sewage pipe, a valve for sealing the air bypass when the air pump is not in use and a water tight valve for preventing water from flushing from flowing throughout the bypass. 
   
   
       15 . The toilet pedestal of  claim 14 , wherein the air pump is an electrically powered rotating air fan, the air valve comprises a lightweight flap that is raised by suction from the rotating air fan when in use, and the water valve comprises a flap that is pressed over outlet from the flush conduit into the air bypass by water flowing through the flush conduit. 
   
   
       16 . The toilet pedestal of  claim 14 , wherein the air bypass comprises a first duct extending from top surface of rear extension down to the flush conduit, a second duct extending from top surface of rear extension down to the sewage pipe and a lid thereover, the lid being sealed to the rear extension via a water and airtight gasket. 
   
   
       17 . The toilet pedestal of  claim 14 , wherein the gasket comprises rubber or an artificial substitute thereof. 
   
   
       18 . A method of retrofitting a toilet to extract odors from toilet bowl, comprising providing a bypass coupling flush outlets under rim of the bowl with sewage pipe downstream of U shaped trap, the bypass having a leaf valve therein and an electric air pump, such that operation of said air pump raises the leaf valve and allows extraction of air and vapors from the bowl to the sewage pipe via the bypass, and cessation of said air pump causes the leaf valve to block the air bypass. 
   
   
       19 . An insert for inserting into a first duct between the top of a rear extension of a toilet pedestal and a flush duct therebeneath, the insert having an air valve comprising a leaf flap configured to be closed by gravity and opened by suction of the air pump at its top end and a water valve comprising a normally open flap that is closeable by pressure of water flushing through the flush duct at its lower end.