CA1179801A - Air extraction for a toilet bowl - Google Patents
Air extraction for a toilet bowlInfo
- Publication number
- CA1179801A CA1179801A CA000426490A CA426490A CA1179801A CA 1179801 A CA1179801 A CA 1179801A CA 000426490 A CA000426490 A CA 000426490A CA 426490 A CA426490 A CA 426490A CA 1179801 A CA1179801 A CA 1179801A
- Authority
- CA
- Canada
- Prior art keywords
- duct
- flush
- water
- cistern
- overflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
- E03D9/04—Special arrangement or operation of ventilating devices
- E03D9/05—Special arrangement or operation of ventilating devices ventilating the bowl
- E03D9/052—Special arrangement or operation of ventilating devices ventilating the bowl using incorporated fans
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Sanitary Device For Flush Toilet (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A conventional toilet bowl and flush cistern of the type including at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl and an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a predetermined level overflows into an opening of the overflow duct for comrnunication to the flush duct, the modification including a T-fitting for coupling a fan into the flush duct downstream of the water valve and a sealed floatable ball for closing the overflow duct to prevent air being drawn while allowing water to enter in the event of an overflow.
A conventional toilet bowl and flush cistern of the type including at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl and an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a predetermined level overflows into an opening of the overflow duct for comrnunication to the flush duct, the modification including a T-fitting for coupling a fan into the flush duct downstream of the water valve and a sealed floatable ball for closing the overflow duct to prevent air being drawn while allowing water to enter in the event of an overflow.
Description
AIR EXTRACTION FOR A TOIL,ET BOWL
BACKGROUND OF THE INVENTION
This invention rela-tes to an air extraction system for a toilet bowl of the type comprising a flush cistern, at least one flush duct communicating from the cistern to the bowl, a wa-ter valve for releasing water from the cistern into the flush duct for flushing the bowl and an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a pre-determined level overflows into an opening of the overflow duct for com-munication to the flush duct.
Toilet bowls of this type are well-known and are available in almost all households of North America.
In almost all of those households the bathroom in which the toilet bowl is located is provided with an air exhaust unit usually communicating with the ceiling which extracts air from the room partly to remove excess humidity produced by the bath or washbasin but mainly to remove unpleasant air and odors arising from the toilet bowl. Such extraction units in order to remove the unpleasant air need to extract hundreds of cubic feet of heated, condi-tioned air in order to remove the problem.
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Proposals have previously been made for e~trac-ting air directly from the toilet bowl but many of these proposals have required either a major reconstruction of the toilet bowl and flushing system or a totally new product. This of course is acceptable in new installa-tions but does not provide a possibility of a retrofit to upgr~de existing equipment.
SUMMARY OF THE INVENTION
It is one object of the invention to provide an assembly which can be used as an air extraction system for a toilet bowl which can be readily installed in existing equipment and which provides a simple number of parts which are relatively inexpensive and yet provide an effective suction system for air from the toilet bowl.
Accordingly the invention provides firstly for use in a toilet bowl and flush cistern of the type com-prising at least one flush duct communicating from the system to the bowl, a water valve for releasing water from the system into the flush duct for flushing the bowl and an overflow duct in the system connected to the flush duct downstream of the water valve and arranged such that the water rising over a predetermined level over-flows into an opening of the overflow duct for ' communication to the flush duct, an air extraction assembly comprising a duct section for connecting to the flush duct downstream of the water valve, means for connecting the duct section to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting upon the opening of the overflow duct it at least partly closes the opening.
According to a second aspect of the invention there is provided a combination of a toilet bowl, a flush cistern, at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl, an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a pre~determined level overflows into an opening of the overflow duct for communication to the flush duct and an air extraction assembly comprising means for connecting the flush duct' to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting on the ~:L7~8(~
opening of the overflow duct it at least partly closes the opening.
It is one advantage of the invention therefore that the suction fan is directly connected to the flush duct of the toilet bowl and thus uses the air ducts com-municating from the toilet bowl through which water is normally directed. Thus air is conveniently and accurately drawn away from the whole area of the toilet bowl without the necessity for the provision of addition-al ducts.
It is a further advantage of the invention that the T-fitting used to connect the suction duct to the flush duct lifts the water valve in the cistern thereby reducing the amount of water used in each flush of the toilet.
It is a still further advantage of the inven-tion that the overflow duct which communicates air from the upper part of the cistern to the flush duct is slmply and conveniently closed or partially closed by a simple body such as a ball which rests upon the open top of the overflow duct and yet when the water rises merely floats away to allow the overflow water to run down the overflow duct to the flush duct.
It is a yet further advantage of the invention .'79~
that the simple closing of the overflow duct prevents the necessity for sealing the top of the cistern relative to the body to reduce air flow in that direction since the sealing of the lid or top is difficult to achieve and when achieved can interfere with the flushing procedure by changing the air pressures within the system.
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, the invention is herein described by reference to the ac-companying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, which:
DESC_IPTION OF THE DRAWINGS_ _ _ __ _ _ _ Figure 1 is a partly cut-away isometric view of a toilet bowl and associated flushing cistern including the air suction system of the present invention installed therein.
Figure 2 is an enlarged side elevational view of the overflow pipe of Figure 1 showing the sealing ball.
Figure 3 is an enlarged isometric view of the T-connector and nut of Figure 2.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
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DETAILED DESCRIPTION
The toilet bowl and cistern shown in Figure 1 are of conventional construction and comprise a conven-tional syphonic toilet bowl 10 having a bowl portion 11 resting on a pedestal 12 and communicating with a syphonic flush section 13 communicating with a downpipe at an outlet 14.
The flush section includes an extraction pipe 15 leading from the bottom of the bowl 11 and an inlet pipe 1~ for communicating water from the cistern into the outlet pipe 15. The water inlet 1~ is connected to a manifold 17 which also communicates with an annular passage 18 around the rim of the toilet bowl which pro-vides a plurality of holes opening downwardly into the toilet bowl one of which is shown at 19.
The conventional cistern arrangement includes a tank 20 with a water inlet 21 controlled by a level sensing cock 22 whereby the tank 20 is filled with water to a desired level each time the level falls following a flushing. A connector pipe 23 communicates water from the tank 20 into the manifold 17 and is controlled by a water valve 24 which comprises a simple rubber plate which rests upon a seating to close off the communication 1~9~
of water from the tank 20 into the manifold 17. The valve 24 can be raised by a chain and lever arrangement 25 communicating with a handle outside the tank 20 for manual operation to provide a flushing of the toilet bowl.
In case of a failure of the cock 22, an over-flow pipe 26 is provided which provides an open mouth lying in a horizontal plane and facing upwardly so that when the level of wa-ter reaches an overflow level above the normal level controlled by the cock 22, the water runs down the overflow pipe 26 into the connector pipe 23 downstream of the valve 24 and vents to waste.
In addition, while the tank 20 is being filled following a flushing, some of the filling water is bypassed through a duct 221 to a connector 3~ at the top of the overflow pipe 2~ so as to replace the water seal at the bottom of the bowl.
In normal operation of the conventional toile-t bowl arrangement, with the tank 20 filled with water to the prescribed level, the valve 24 is raised so the water exits from the tank into the manifold 17 and then through the openings 1~ into the toilet bowl and through the channel 16 thus washing the toilet bowl and raising the level of water in the toilet bowl such that it passes - ~ -over the top of the channel 15 into the downpipe. This causes a siphon action which draws all the water and materials from the toilet bowl into the downpipe with the bowl being refilled to replace the water seal by the water running through the duct 221.
According to the modification of the present invention, the connector pipe 23 is disconnected from the bottom of the tank 20 and an intermediate T-fitting pipe 27 is added between the connector pipe and the base of the tank. A rubber seal 28 is provided between the connector pipe 23 and the T-fitting pipe 27. The normal male screw thread on the connector pipe 23 which conventionally passes through the base of the tank 20 is screwed into a cooperating female screw thread provided in the T-fitting connector 27. The details of the T-fitting connector are shown in Figure 3 where the female screw thread is indicated at 29.
The T-fit*ing includes a male screw thread 30 at the bottom end for passing through the opening in the base of the tank 20 in replacement of the male screw thread of the connector pipe 23. A further rubber sealing ring 31 shown in more detail in Figure 3 of tri-angular cross-sectional shape has its flat base resting against the base of the tank 20 and secured in position , .
' ' ~' .
by a nut 32 cooperating with the under surface of the base of the tank 20.
In this way the water valve 24 and connector pipe 23 are raised by approximately three inches from the bottom of the tank 20 and also a pipe connector 33 is provided for receiving a flexible coupling pipe 34 which passes through an opening at the top of the tank between the upper rim of the tank 20 and its lid 201 to a fan 35 suitably located for example in the roof space above -the room concerned. The flexible pipe 34 is a pressfit on the pipe connector 33 which is provided with conventional ridges for properly locating the flexible pipe 34 in positlon.
The fan 35 therefore acts to extract air from the duct 34 through the T-fitting 27 from the manifold 17. In addition since the overflow pipe 26 is coupled to the connector 23, air would also be drawn from the over-flow pipe 26 except that the invention provides, as shown in more detail in Figure 2, a valve device for the upper end of the overflow pipe 26.
The valve device comprises a seating 36 in the form of a sleeve having an internal diameter designed so that it slips on to the outer surface of the overflow pipe 26 in a resistance fit. The sleeve 36 provides a v -- 10 _ seating for a valve body 37 which is conveniently spheri-cal and which sits on the sleeve 3G thus substantially sealing the open end of the sleeve 36. The spherical body 37 which is conveniently formed from or substan-tially similar to a table tennis ball is heavier than air and thus rests upon the seat 36 to provide a seal.
However should the water level rise due to a failure of the cock 22, the water can rise to a position above the mouth of the sleeve 36 thus lifting the ball from its mouth and allowing it to float away to allow the overflow water to run down the overflow pipe 26.
The connector 38 attached to the duct 221 is conveniently formed as part of the cylindrical seat 36 so that for application of the apparatus to existing toilet equipment a convenient connection can be provided which does not interfere with the seat for the ball 37.
The valve on the overflow pipe 26 therefore prevents or inhibits air from flowing into the T-fitting 27 downstream of the water valve 24. The air drawn from the manifold 17 therefore acts to draw air from the openings 19 in the rim of the toilet bowl thus directly e~tracting air from the toilet bowl. When the T-fitting 27 and manifold 17 are filled with water at a flush, water can be drawn partly into the pipe 34 dependent upon ~ ~'7~
the suction of the fan 35 but insufficient for the water to reach the fan. Immediately the tank 20 is emptied by the flush any water remaining in the pipe 34 runs into the manifold 17 to assist the flush.
Since the water valve 24 is raised by approxi-mately three inches the amount of water used in each flush is reduced by approximately six litres thus acting to save water.
The new valve arrangement for the overflow pipe 26 allows the suction from the pipe 34 to be directly connected to the manifold 17 without the necessity of sealing the rim of the tank 20 relative to its lid 201.
However the effectiveness of the overflow pipe 26 is in no way inhibited to ensure that damaging overflows do not occur.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
BACKGROUND OF THE INVENTION
This invention rela-tes to an air extraction system for a toilet bowl of the type comprising a flush cistern, at least one flush duct communicating from the cistern to the bowl, a wa-ter valve for releasing water from the cistern into the flush duct for flushing the bowl and an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a pre-determined level overflows into an opening of the overflow duct for com-munication to the flush duct.
Toilet bowls of this type are well-known and are available in almost all households of North America.
In almost all of those households the bathroom in which the toilet bowl is located is provided with an air exhaust unit usually communicating with the ceiling which extracts air from the room partly to remove excess humidity produced by the bath or washbasin but mainly to remove unpleasant air and odors arising from the toilet bowl. Such extraction units in order to remove the unpleasant air need to extract hundreds of cubic feet of heated, condi-tioned air in order to remove the problem.
~; ~'7''3~
Proposals have previously been made for e~trac-ting air directly from the toilet bowl but many of these proposals have required either a major reconstruction of the toilet bowl and flushing system or a totally new product. This of course is acceptable in new installa-tions but does not provide a possibility of a retrofit to upgr~de existing equipment.
SUMMARY OF THE INVENTION
It is one object of the invention to provide an assembly which can be used as an air extraction system for a toilet bowl which can be readily installed in existing equipment and which provides a simple number of parts which are relatively inexpensive and yet provide an effective suction system for air from the toilet bowl.
Accordingly the invention provides firstly for use in a toilet bowl and flush cistern of the type com-prising at least one flush duct communicating from the system to the bowl, a water valve for releasing water from the system into the flush duct for flushing the bowl and an overflow duct in the system connected to the flush duct downstream of the water valve and arranged such that the water rising over a predetermined level over-flows into an opening of the overflow duct for ' communication to the flush duct, an air extraction assembly comprising a duct section for connecting to the flush duct downstream of the water valve, means for connecting the duct section to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting upon the opening of the overflow duct it at least partly closes the opening.
According to a second aspect of the invention there is provided a combination of a toilet bowl, a flush cistern, at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl, an overflow duct in the cistern connected to the flush duct downstream of the water valve and arranged such that water rising above a pre~determined level overflows into an opening of the overflow duct for communication to the flush duct and an air extraction assembly comprising means for connecting the flush duct' to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting on the ~:L7~8(~
opening of the overflow duct it at least partly closes the opening.
It is one advantage of the invention therefore that the suction fan is directly connected to the flush duct of the toilet bowl and thus uses the air ducts com-municating from the toilet bowl through which water is normally directed. Thus air is conveniently and accurately drawn away from the whole area of the toilet bowl without the necessity for the provision of addition-al ducts.
It is a further advantage of the invention that the T-fitting used to connect the suction duct to the flush duct lifts the water valve in the cistern thereby reducing the amount of water used in each flush of the toilet.
It is a still further advantage of the inven-tion that the overflow duct which communicates air from the upper part of the cistern to the flush duct is slmply and conveniently closed or partially closed by a simple body such as a ball which rests upon the open top of the overflow duct and yet when the water rises merely floats away to allow the overflow water to run down the overflow duct to the flush duct.
It is a yet further advantage of the invention .'79~
that the simple closing of the overflow duct prevents the necessity for sealing the top of the cistern relative to the body to reduce air flow in that direction since the sealing of the lid or top is difficult to achieve and when achieved can interfere with the flushing procedure by changing the air pressures within the system.
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, the invention is herein described by reference to the ac-companying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, which:
DESC_IPTION OF THE DRAWINGS_ _ _ __ _ _ _ Figure 1 is a partly cut-away isometric view of a toilet bowl and associated flushing cistern including the air suction system of the present invention installed therein.
Figure 2 is an enlarged side elevational view of the overflow pipe of Figure 1 showing the sealing ball.
Figure 3 is an enlarged isometric view of the T-connector and nut of Figure 2.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
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DETAILED DESCRIPTION
The toilet bowl and cistern shown in Figure 1 are of conventional construction and comprise a conven-tional syphonic toilet bowl 10 having a bowl portion 11 resting on a pedestal 12 and communicating with a syphonic flush section 13 communicating with a downpipe at an outlet 14.
The flush section includes an extraction pipe 15 leading from the bottom of the bowl 11 and an inlet pipe 1~ for communicating water from the cistern into the outlet pipe 15. The water inlet 1~ is connected to a manifold 17 which also communicates with an annular passage 18 around the rim of the toilet bowl which pro-vides a plurality of holes opening downwardly into the toilet bowl one of which is shown at 19.
The conventional cistern arrangement includes a tank 20 with a water inlet 21 controlled by a level sensing cock 22 whereby the tank 20 is filled with water to a desired level each time the level falls following a flushing. A connector pipe 23 communicates water from the tank 20 into the manifold 17 and is controlled by a water valve 24 which comprises a simple rubber plate which rests upon a seating to close off the communication 1~9~
of water from the tank 20 into the manifold 17. The valve 24 can be raised by a chain and lever arrangement 25 communicating with a handle outside the tank 20 for manual operation to provide a flushing of the toilet bowl.
In case of a failure of the cock 22, an over-flow pipe 26 is provided which provides an open mouth lying in a horizontal plane and facing upwardly so that when the level of wa-ter reaches an overflow level above the normal level controlled by the cock 22, the water runs down the overflow pipe 26 into the connector pipe 23 downstream of the valve 24 and vents to waste.
In addition, while the tank 20 is being filled following a flushing, some of the filling water is bypassed through a duct 221 to a connector 3~ at the top of the overflow pipe 2~ so as to replace the water seal at the bottom of the bowl.
In normal operation of the conventional toile-t bowl arrangement, with the tank 20 filled with water to the prescribed level, the valve 24 is raised so the water exits from the tank into the manifold 17 and then through the openings 1~ into the toilet bowl and through the channel 16 thus washing the toilet bowl and raising the level of water in the toilet bowl such that it passes - ~ -over the top of the channel 15 into the downpipe. This causes a siphon action which draws all the water and materials from the toilet bowl into the downpipe with the bowl being refilled to replace the water seal by the water running through the duct 221.
According to the modification of the present invention, the connector pipe 23 is disconnected from the bottom of the tank 20 and an intermediate T-fitting pipe 27 is added between the connector pipe and the base of the tank. A rubber seal 28 is provided between the connector pipe 23 and the T-fitting pipe 27. The normal male screw thread on the connector pipe 23 which conventionally passes through the base of the tank 20 is screwed into a cooperating female screw thread provided in the T-fitting connector 27. The details of the T-fitting connector are shown in Figure 3 where the female screw thread is indicated at 29.
The T-fit*ing includes a male screw thread 30 at the bottom end for passing through the opening in the base of the tank 20 in replacement of the male screw thread of the connector pipe 23. A further rubber sealing ring 31 shown in more detail in Figure 3 of tri-angular cross-sectional shape has its flat base resting against the base of the tank 20 and secured in position , .
' ' ~' .
by a nut 32 cooperating with the under surface of the base of the tank 20.
In this way the water valve 24 and connector pipe 23 are raised by approximately three inches from the bottom of the tank 20 and also a pipe connector 33 is provided for receiving a flexible coupling pipe 34 which passes through an opening at the top of the tank between the upper rim of the tank 20 and its lid 201 to a fan 35 suitably located for example in the roof space above -the room concerned. The flexible pipe 34 is a pressfit on the pipe connector 33 which is provided with conventional ridges for properly locating the flexible pipe 34 in positlon.
The fan 35 therefore acts to extract air from the duct 34 through the T-fitting 27 from the manifold 17. In addition since the overflow pipe 26 is coupled to the connector 23, air would also be drawn from the over-flow pipe 26 except that the invention provides, as shown in more detail in Figure 2, a valve device for the upper end of the overflow pipe 26.
The valve device comprises a seating 36 in the form of a sleeve having an internal diameter designed so that it slips on to the outer surface of the overflow pipe 26 in a resistance fit. The sleeve 36 provides a v -- 10 _ seating for a valve body 37 which is conveniently spheri-cal and which sits on the sleeve 3G thus substantially sealing the open end of the sleeve 36. The spherical body 37 which is conveniently formed from or substan-tially similar to a table tennis ball is heavier than air and thus rests upon the seat 36 to provide a seal.
However should the water level rise due to a failure of the cock 22, the water can rise to a position above the mouth of the sleeve 36 thus lifting the ball from its mouth and allowing it to float away to allow the overflow water to run down the overflow pipe 26.
The connector 38 attached to the duct 221 is conveniently formed as part of the cylindrical seat 36 so that for application of the apparatus to existing toilet equipment a convenient connection can be provided which does not interfere with the seat for the ball 37.
The valve on the overflow pipe 26 therefore prevents or inhibits air from flowing into the T-fitting 27 downstream of the water valve 24. The air drawn from the manifold 17 therefore acts to draw air from the openings 19 in the rim of the toilet bowl thus directly e~tracting air from the toilet bowl. When the T-fitting 27 and manifold 17 are filled with water at a flush, water can be drawn partly into the pipe 34 dependent upon ~ ~'7~
the suction of the fan 35 but insufficient for the water to reach the fan. Immediately the tank 20 is emptied by the flush any water remaining in the pipe 34 runs into the manifold 17 to assist the flush.
Since the water valve 24 is raised by approxi-mately three inches the amount of water used in each flush is reduced by approximately six litres thus acting to save water.
The new valve arrangement for the overflow pipe 26 allows the suction from the pipe 34 to be directly connected to the manifold 17 without the necessity of sealing the rim of the tank 20 relative to its lid 201.
However the effectiveness of the overflow pipe 26 is in no way inhibited to ensure that damaging overflows do not occur.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
(1) For use in a toilet bowl and flush system of the type comprising at least one flush duct communi-cating from the system to the bowl, a water valve for releasing water from the system into the flush duct for flushing the bowl and an overflow duct in the system connected to the flush duct downstream of the water valve and arranged such that the water rising over a predeter-mined level overflows into an opening of the overflow duct for communication to the flush duct, an air extrac-tion assembly comprising a duct section for connecting to the flush duct downstream of the water valve, means for connecting the duct section to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting upon the opening of the overflow duct it at least partly closes the opening.
(2) An assembly according to Claim 1 wherein the body is spherical.
(3) An assembly according to Claim 1 in-cluding a seating device comprising a sleeve for surrounding the end of the overflow duct and providing a horizontal seat for receiving the body.
(4) An assembly according to Claim 3 wherein the seating device includes an opening smaller than the opening to the overflow duct and connected to the over-flow duct downstream of the body.
(5) An assembly according to Claim 1 wherein the duct section comprises a T-fitting arranged for con-nection between the water valve and the flush duct.
(6) An assembly according to Claim 5 wherein the T-fitting is arranged to be connected inside the cistern so as to raise the water valve relative to the bottom of the cistern so as to reduce the volume of water communicated from the cistern to the flush duct.
(7) An assembly according to Claim 1 in-cluding an air suction fan.
(8) A combination comprising a toilet bowl, a flush cistern, at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl, an overflow duct in the cistern connected to the flush duct downstream of the water valve and arrange such that water rising above a pre-determined level overflows into an opening of the overflow duct for communication to the flush duct and an air extraction assembly comprising means for connecting the flush duct to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting on the opening of the overflow duct it at least partly closes the opening.
(9) An assembly according to Claim 2 wherein the body is spherical.
(10) An assembly according to Claim 3 in-cluding a seating device comprising a sleeve for surrounding the end of the overflow duct and providing a horizontal seat for receiving the body.
(11) An assembly according to Claim 4 wherein the seating device includes an opening smaller than the opening to the overflow duct and connected to the over-flow duct downstream of the body.
(12) An assembly according to Claim 5 wherein the duct section comprises a T-fitting arranged for con-nection between the water valve and the flush duct.
(13) An assembly according to Claim 6 wherein the T-fitting is arranged to be connected inside the cistern so as to raise the water valve relative to the bottom of the cistern so as to reduce the volume of water communicated from the cistern to the flush duct.
(14) An assembly according to Claim 7 including an air suction fan.
(2) An assembly according to Claim 1 wherein the body is spherical.
(3) An assembly according to Claim 1 in-cluding a seating device comprising a sleeve for surrounding the end of the overflow duct and providing a horizontal seat for receiving the body.
(4) An assembly according to Claim 3 wherein the seating device includes an opening smaller than the opening to the overflow duct and connected to the over-flow duct downstream of the body.
(5) An assembly according to Claim 1 wherein the duct section comprises a T-fitting arranged for con-nection between the water valve and the flush duct.
(6) An assembly according to Claim 5 wherein the T-fitting is arranged to be connected inside the cistern so as to raise the water valve relative to the bottom of the cistern so as to reduce the volume of water communicated from the cistern to the flush duct.
(7) An assembly according to Claim 1 in-cluding an air suction fan.
(8) A combination comprising a toilet bowl, a flush cistern, at least one flush duct communicating from the cistern to the bowl, a water valve for releasing water from the cistern into the flush duct for flushing the bowl, an overflow duct in the cistern connected to the flush duct downstream of the water valve and arrange such that water rising above a pre-determined level overflows into an opening of the overflow duct for communication to the flush duct and an air extraction assembly comprising means for connecting the flush duct to a suction fan for drawing air from the flush duct and means for reducing air flow through the overflow duct comprising a body which is less dense than water and more dense than air and is so shaped that when resting on the opening of the overflow duct it at least partly closes the opening.
(9) An assembly according to Claim 2 wherein the body is spherical.
(10) An assembly according to Claim 3 in-cluding a seating device comprising a sleeve for surrounding the end of the overflow duct and providing a horizontal seat for receiving the body.
(11) An assembly according to Claim 4 wherein the seating device includes an opening smaller than the opening to the overflow duct and connected to the over-flow duct downstream of the body.
(12) An assembly according to Claim 5 wherein the duct section comprises a T-fitting arranged for con-nection between the water valve and the flush duct.
(13) An assembly according to Claim 6 wherein the T-fitting is arranged to be connected inside the cistern so as to raise the water valve relative to the bottom of the cistern so as to reduce the volume of water communicated from the cistern to the flush duct.
(14) An assembly according to Claim 7 including an air suction fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000426490A CA1179801A (en) | 1983-04-22 | 1983-04-22 | Air extraction for a toilet bowl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000426490A CA1179801A (en) | 1983-04-22 | 1983-04-22 | Air extraction for a toilet bowl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1179801A true CA1179801A (en) | 1984-12-27 |
Family
ID=4125073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000426490A Expired CA1179801A (en) | 1983-04-22 | 1983-04-22 | Air extraction for a toilet bowl |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1179801A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2728290A1 (en) * | 1994-12-16 | 1996-06-21 | Chaussin Jacques | Extractor for sucking out air from toilet bowl |
| FR2735801A1 (en) * | 1995-06-21 | 1996-12-27 | Humbert Jacques Paul Marie | Toilet flushing cistern with internal air extraction tube |
| EP0978596A1 (en) * | 1998-08-05 | 2000-02-09 | Nicolas Cruz Cobo | Air extraction system for toilets |
| CN103074927A (en) * | 2013-02-04 | 2013-05-01 | 厦门瑞尔特卫浴科技股份有限公司 | Drainage accelerating device |
-
1983
- 1983-04-22 CA CA000426490A patent/CA1179801A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2728290A1 (en) * | 1994-12-16 | 1996-06-21 | Chaussin Jacques | Extractor for sucking out air from toilet bowl |
| FR2735801A1 (en) * | 1995-06-21 | 1996-12-27 | Humbert Jacques Paul Marie | Toilet flushing cistern with internal air extraction tube |
| EP0978596A1 (en) * | 1998-08-05 | 2000-02-09 | Nicolas Cruz Cobo | Air extraction system for toilets |
| ES2151833A1 (en) * | 1998-08-05 | 2001-01-01 | Cobo Nicolas Cruz | Air extraction system for toilets |
| CN103074927A (en) * | 2013-02-04 | 2013-05-01 | 厦门瑞尔特卫浴科技股份有限公司 | Drainage accelerating device |
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