CA2052084C - Multi action back water valve system with rat protector - Google Patents
Multi action back water valve system with rat protectorInfo
- Publication number
- CA2052084C CA2052084C CA 2052084 CA2052084A CA2052084C CA 2052084 C CA2052084 C CA 2052084C CA 2052084 CA2052084 CA 2052084 CA 2052084 A CA2052084 A CA 2052084A CA 2052084 C CA2052084 C CA 2052084C
- Authority
- CA
- Canada
- Prior art keywords
- sewage
- housing
- dwelling
- sewer
- valve assembly
- 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 - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/06—Devices for restraining rats or other animals
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
- E03F7/04—Valves for preventing return flow
Abstract
A back water valve system to be installed at the entrance of the city sewer system into a dwelling eliminates a series of secondary conventional back water valves. The valve system includes a one-way check valve and an opening thereabove partly obstructed by a screen for allowing for free circulation of sewer gases through the valve system. The screen prevents the entrance into the dwelling of small animals such as rats from the city sewer system. A pair of upper flappers each provided with a float are pivotally mounted on the dwelling side and on the city sewer side of the opening.
Therefore, the one-way check valve prevents spillage into the dwelling of sewer back-ups. The upper flapper on the city sewer side is adapted to close the opening and its screen also upon sewer back-ups to prevent spillage on the dwelling side of the valve system and also to prevent fouling of the screen. The flapper located on the dwelling side of the opening is adapted to close the opening and its screen when there is a sufficient flow of waste water coming from the dwelling for preventing fouling of the screen.
Therefore, the opening and its screen allow for free passage of the sewer gases while protecting the dwelling against intrusion of rats or other pests.
The one-way check valve includes a double-hinge flapper which is normally closed and protects the dwelling against sewer back-ups while facilitating the use of fish wires when cleaning the valve system.
Therefore, the one-way check valve prevents spillage into the dwelling of sewer back-ups. The upper flapper on the city sewer side is adapted to close the opening and its screen also upon sewer back-ups to prevent spillage on the dwelling side of the valve system and also to prevent fouling of the screen. The flapper located on the dwelling side of the opening is adapted to close the opening and its screen when there is a sufficient flow of waste water coming from the dwelling for preventing fouling of the screen.
Therefore, the opening and its screen allow for free passage of the sewer gases while protecting the dwelling against intrusion of rats or other pests.
The one-way check valve includes a double-hinge flapper which is normally closed and protects the dwelling against sewer back-ups while facilitating the use of fish wires when cleaning the valve system.
Description
- - ' MULTI ACTION BACK WATER VALVE
SYSTEM WITH RAT PROTECTOR
BACKGROUND OF THE INVENTION
51. Field of the Invention The present invention relates to back water valve systems and, more particularly, to a back water valve system for installation at the entrance of a city sewer system into a dwelling for protection against sewer back-ups while allowing for free circulation of sewer gases through the valve system and providing protection against the entrance of pests, such as rats, into the dwelling from the city sewer system.
152. DescriPtion of the Prior Art Existing back water valves provide for protection of the dwelling against sewer back-ups but without allowing for free circulation of sewer gases therethrough. Because of this structure, installation of such conventional valves is not permitted at the entrance of the main drain to the house. Therefore, it is necessary to install back water valves on every plumbing fixture located below the street level in order the protect it against sewer back-ups.
Furthermore, it is virtually impossible to clean existing back water valves by way of fish wires. Indeed, the fish wire will pass through the valve from the dwelling side thereof but the fish wire can only be withdrawn with difficulty from the valve in view of the return closing action of the flapper thereof which traps the fish wire between the flapper and the valve seat.
Moreover, existing back water valves are not equipped with any devices allowing for the release of pressure built up inside the sewer line which can be caused by a blocked drain.
- 1 - ~
~0~084 SUMMARY OF THE INVENTION
It is therefore an aim of the present invention to eliminate secondary back water valves with a novel main back water valve system adapted for installation at the entrance of a city sewer system into a dwelling while allowing for free circulation of sewer gases through the back water valve system of the present invention.
It is also an aim of the present invention to provide a novel back water valve which provides constant protection against the entrance of pests, such as rats, into the dwelling from the city sewer system.
It is a further aim of the present invention to provide a back water valve system having a novel flapper which facilitates the cleaning of the valve, for instance, when a fish wire is used therefor.
Therefore, in accordance with the present invention, there is provided a valve assembly for use on a sewage line or the like, comprising housing means defining sewage inlet and outlet openings adapted to be connected respectively to sewage inlet and outlet sections of the sewage line, one-way valve means and gas flow means being provided in said housing means between the inlet and outlet sections of the sewage line, said one-way valve means being adapted to allow for a flow through said housing means from the inlet section of the sewage line towards the outlet section thereof while preventing a back-up flow through said housing means from the outlet section of the sewage line towards the inlet section thereof, said gas flow means being located above said one-way valve means and being adapted to allow sewer gases to circulate through said housing means.
Also in accordance with the present invention, there is provided a conduit assembly for allowing sewer gases to flow in a sewage line or the like, comprising opposite first and second ends adapted to be fluidly connected at spaced apart locations on the sewage line, gas flow means being provided in said conduit means between said first and second ends thereof and above the sewage line and being adapted to allow sewer gases to circulate through said conduit means.
BRIEF DESCRIPTION OF THE DRAWINGS
Having thus generally described the nature of the invention, reference will now be made to the accompanying drawings, showing by way of illustration a preferred embodiment thereof, and in which:
Fig. 1 is a longitudinal and vertical cross-sectional view of a back water valve system in accordance with the present invention;
Fig. 2 is a transversal and vertical cross-sectional view taken along line 2-2 of Fig. l;
Fig. 3 is a schematical side elevational cross-sectional view of part of the back water valve system of Fig. 1 showing a pivot of a flapper of the valve system when a fish wire is inserted therethrough from the dwelling side of the valve system; and Fig. 4 is a schematical side elevational cross-sectional view showing part of the valve system of Fig. 1 in a way similar to Fig. 3, but wherein the flapper is shown as the fish wire is being removed from the valve system.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Since existing back water valves do not permit free passage of sewer gases through the valve, installation of such existing back water valves is not allowed at the entrance of the main drain of a dwelling, such as a house. Therefore, it is necessary 2 05208~
to install separate back water valves on every plumbing fixture located below the street level so as to protect it against sewer back-ups. Hence, conventional back water valves must be installed possibly on each of the following fixtures: basement bathroom, garage pit or floor drain, french drain pit, washing machine drain, laundry tub, etc.
Therefore, in accordance with the present invention, Fig. 1 illustrates a back water valve system S which eliminates conventional secondary back water valves while allowing for free circulation of sewer gases therethrough and providing continuous protection against rats and other small animals.
The valve system S comprises a housing 10 which includes therein a transversally extending separation wall 12 having an upper substantially vertical section 14 and a lower section 16 merging therewith and extending at a slight angle with respect to a vertical transversal plane 18 of the housing 10. The lower section 16 of the wall 12 defines a circular lower opening 20 with a one-way double-hinged flapper 22 being provided for closing, in a normal position thereof, this lower opening 20.
In Fig. 1, reference numerals 24 and 26 correspond to the ends of the valve system S which are adapted for connection respectively to the entrance of the main drain of the dwelling and to the city sewer conduit.
Therefore, in Fig. 1, the right side of the valve system S with respect to the wall 12 is referred to as the city sewer side of the valve system S, whereas the section of the valve system S located at the left of the separation wall 12 is referred to as the dwelling side of the valve system S. The flapper 22 has a normally closed position which is maintained by the forces of gravity and which is reinforced by the hydrodynamic forces of any back-up occurring on the city side 26 of the valve system S.
Therefore, the lower section 16 of the separation wall 12 acts as a one-way check valve adapted to protect the dwelling against sewer back-ups. The flapper 22 of this check valve will pivot along arrow 28 of Fig. 1 upon the impact thereon of waste flowing from the dwelling towards the city sewer thereby allowing for communication through the lower opening 20 between the dwelling and city sewer sides of the valve system S.
The upper section 14 of the separation wall 12 defines a circular upper opening 30 which is partly obstructed by a screen 32. A city float 34 and a dwelling float 36 which are provided respectively on the city sewer side and on the dwelling side of the valve system S are pivotally mounted to the separation wall 12, below the upper opening 30, so as to act as flappers each adapted to close the upper opening 30. In a normal position of the floats 34 and 36, as illustrated in Fig. 1, the upper opening 30 is not closed by either one of these floats 34 and 36, whereby the screen 32 allows for a free flow of sewer gases through the valve system S while protecting the dwelling against the entry of pests, such as rats, coming from the city sewer side 26 of the valve system S. The operation and use of both the city and dwelling floats 34 and 36 will be explained in details hereinafter.
As best seen in Figs. 1 and 2, the double-hinged flapper 22 comprises a circular plate 38 adapted to close the lower opening 20 and an intermediate hinge 40 which is hingedly connected at a lower end thereof to an upper end of the circular plate 38 and at an upper end thereof to the separation wall 12, above the lower opening 20 thereof. The use and operation of the one-way check valve provided by the flapper 22 will be described in details hereinafter.
~` 2os2084 The housing 10 includes a removable cover 42 which is secured thereto with screws with a gasket being provided between the cover 42 and a seat therefor defined on the upper end of the housing 10.
The removable cover 42 provides for a free access to the inside of the valve system S. A threaded opening 44 is defined in the cover 42 for the installation of a globe relief valve to allow for pressure release when the sewer line gets blocked. Indeed, with such a release valve, the existing pressure inside the line can be released, such as on the city side 26 of the valve system S. With this feature, a water line or an air line can be connected to the cover relief valve (or directly to threaded opening 44) for facilitating the cleaning of the sewer line and, in some cases, the unblocking thereof, thereby eliminating the requirement of a fish wire and allowing the sewer line to be unblocked without spillage of sewer water around the valve system S.
As mentioned hereinabove, the flapper 22 in its normal position closes the lower opening 20, whereas both the city and dwelling floats 34 and 36 allow for gaseous communication through the screen 32 between the dwelling and city sewer sides of the valve system S. However, when there are sewer back-ups, the one-way flapper 22 is forced towards the lower opening 20 of the lower section 16 of the separation wall 12 thereby preventing any sewer spillage through the lower opening 20 into the dwelling. Sufficient sewer back-ups will also cause the c ity f loat 3 4 to upwardly pivot along arrow 4 6 o:E
Fig. 1 towards the separation wall 12 so as to close the upper opening 30 and thus prevent sewer back-ups spillage through this upper opening 30 while also protecting the screen 32 against fouling. Indeed, a rising liquid (e.g. sewage) level on the city side of the valve system S initiates the closing of the city 2 0 ~ 2 0 ~ 4 float 34 with the hydrodynamic forces of the back-up flow completing the closing of the city float 34. The city float 34 returns to its normally open position under the influence of gravity when the liquid level subsides.
On the other hand, if there is an excessive flow of sewer waste water from the dwelling, the dwelling float 36 will pivot along arrow 48 towards the separation wall 12 so as to close the upper opening 30 and also to protect the screen 32 against fouling (for the same reasons as the city float 34).
The opening and closing actions of the dwelling float 36 are similar, if not identical, to those of the city float 34.
Now referring to Figs. 3 and 4, when it is desired to use a fish wire W for cleaning the valve system S and the sewage pipe on the city side 26 of the flapper 22, the fish wire W can be introduced from the dwelling side along arrow 50 of Fig. 3 through the lower opening 20 thereby causing the flapper 22 to pivot along arrow 52 (also of Fig. 3), whereby the fish wire W extends through the lower opening 20. The problem encountered with conventional back-up valves when the fish wire is removed therefrom is solved in the present invention by the double-hinged flapper 22 as, when the fish wire W is pulled back along arrow 54 of Fig. 4, the intermediate hinge 40 of the flapper 22 will move forward thereby lifting the circular plate 38 of the flapper 22 (wherein the circular plate 38 and the intermediate hinge 40 rotate in opposite directions) and thus allowing for the fish wire W to be pulled out from the lower opening 20. The flapper 22 then returns to its closed position (i.e. blocking the lower opening 20) under the influence of gravity.
In summary, the flapper 22 is a double-swiveled member which stays in a normally -- 2o~2u8~
closed position during the operation of the valve system S for protecting the dwelling against back-ups of the sewer. The flapper 22 will open on impact on the waste flowing from the dwelling. The city float 34 is a flapper equipped with a float which is normally open for allowing sewer gases to pass - through the valve system S at the upper opening 30 thereof, although this city float 34 will close the upper opening 30 under sufficient sewer back-up for preventing sewer spillage through the valve system S
into the dwelling and for preventing fouling of the screen 32. The dwelling float 36 is a flapper equipped with a float provided on the dwelling side of the valve system S and which normally stays open for allowing for the passage through the valve system S of the sewer gases, although the dwelling float 36 can close when there is excessive flow of waste water coming from the dwelling thereby protecting the screen 32 against fouling. The screen 32 allows for a free passage of the sewer gases while protecting the dwelling against intrusion of rats or other pests which would otherwise possibly pass through the valve system S from the city sewer towards the dwelling.
The present valve system S can be made completely out of plastic materials or cast iron with brass flappers, depending on local codes. The valve system S can be installed in existing houses or in new installations on the main sewer drain, right after the cleanout at the entrance.
The back water valve system S of the present invention is thus a one-way check valve adapted to be installed at the entrance of the city sewer system into the dwelling for providing protection against sewer back-ups while allowing for free circulation of the sewer gases through the valve system and while also providing constant protection against the entrance of pests into the dwelling. The - 20~2084 valve system S is designed so that the normal flow of the sewage remains unimpeded.
As mentioned hereinbefore, the present back water valve system S is a main back water valve which replaces the required plurality of secondary conventional valves used on each of a series of dwelling fixtures. Therefore, the valve system S
eliminates a large number of secondary valves thereby providing for substantial cost savings.
g
SYSTEM WITH RAT PROTECTOR
BACKGROUND OF THE INVENTION
51. Field of the Invention The present invention relates to back water valve systems and, more particularly, to a back water valve system for installation at the entrance of a city sewer system into a dwelling for protection against sewer back-ups while allowing for free circulation of sewer gases through the valve system and providing protection against the entrance of pests, such as rats, into the dwelling from the city sewer system.
152. DescriPtion of the Prior Art Existing back water valves provide for protection of the dwelling against sewer back-ups but without allowing for free circulation of sewer gases therethrough. Because of this structure, installation of such conventional valves is not permitted at the entrance of the main drain to the house. Therefore, it is necessary to install back water valves on every plumbing fixture located below the street level in order the protect it against sewer back-ups.
Furthermore, it is virtually impossible to clean existing back water valves by way of fish wires. Indeed, the fish wire will pass through the valve from the dwelling side thereof but the fish wire can only be withdrawn with difficulty from the valve in view of the return closing action of the flapper thereof which traps the fish wire between the flapper and the valve seat.
Moreover, existing back water valves are not equipped with any devices allowing for the release of pressure built up inside the sewer line which can be caused by a blocked drain.
- 1 - ~
~0~084 SUMMARY OF THE INVENTION
It is therefore an aim of the present invention to eliminate secondary back water valves with a novel main back water valve system adapted for installation at the entrance of a city sewer system into a dwelling while allowing for free circulation of sewer gases through the back water valve system of the present invention.
It is also an aim of the present invention to provide a novel back water valve which provides constant protection against the entrance of pests, such as rats, into the dwelling from the city sewer system.
It is a further aim of the present invention to provide a back water valve system having a novel flapper which facilitates the cleaning of the valve, for instance, when a fish wire is used therefor.
Therefore, in accordance with the present invention, there is provided a valve assembly for use on a sewage line or the like, comprising housing means defining sewage inlet and outlet openings adapted to be connected respectively to sewage inlet and outlet sections of the sewage line, one-way valve means and gas flow means being provided in said housing means between the inlet and outlet sections of the sewage line, said one-way valve means being adapted to allow for a flow through said housing means from the inlet section of the sewage line towards the outlet section thereof while preventing a back-up flow through said housing means from the outlet section of the sewage line towards the inlet section thereof, said gas flow means being located above said one-way valve means and being adapted to allow sewer gases to circulate through said housing means.
Also in accordance with the present invention, there is provided a conduit assembly for allowing sewer gases to flow in a sewage line or the like, comprising opposite first and second ends adapted to be fluidly connected at spaced apart locations on the sewage line, gas flow means being provided in said conduit means between said first and second ends thereof and above the sewage line and being adapted to allow sewer gases to circulate through said conduit means.
BRIEF DESCRIPTION OF THE DRAWINGS
Having thus generally described the nature of the invention, reference will now be made to the accompanying drawings, showing by way of illustration a preferred embodiment thereof, and in which:
Fig. 1 is a longitudinal and vertical cross-sectional view of a back water valve system in accordance with the present invention;
Fig. 2 is a transversal and vertical cross-sectional view taken along line 2-2 of Fig. l;
Fig. 3 is a schematical side elevational cross-sectional view of part of the back water valve system of Fig. 1 showing a pivot of a flapper of the valve system when a fish wire is inserted therethrough from the dwelling side of the valve system; and Fig. 4 is a schematical side elevational cross-sectional view showing part of the valve system of Fig. 1 in a way similar to Fig. 3, but wherein the flapper is shown as the fish wire is being removed from the valve system.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Since existing back water valves do not permit free passage of sewer gases through the valve, installation of such existing back water valves is not allowed at the entrance of the main drain of a dwelling, such as a house. Therefore, it is necessary 2 05208~
to install separate back water valves on every plumbing fixture located below the street level so as to protect it against sewer back-ups. Hence, conventional back water valves must be installed possibly on each of the following fixtures: basement bathroom, garage pit or floor drain, french drain pit, washing machine drain, laundry tub, etc.
Therefore, in accordance with the present invention, Fig. 1 illustrates a back water valve system S which eliminates conventional secondary back water valves while allowing for free circulation of sewer gases therethrough and providing continuous protection against rats and other small animals.
The valve system S comprises a housing 10 which includes therein a transversally extending separation wall 12 having an upper substantially vertical section 14 and a lower section 16 merging therewith and extending at a slight angle with respect to a vertical transversal plane 18 of the housing 10. The lower section 16 of the wall 12 defines a circular lower opening 20 with a one-way double-hinged flapper 22 being provided for closing, in a normal position thereof, this lower opening 20.
In Fig. 1, reference numerals 24 and 26 correspond to the ends of the valve system S which are adapted for connection respectively to the entrance of the main drain of the dwelling and to the city sewer conduit.
Therefore, in Fig. 1, the right side of the valve system S with respect to the wall 12 is referred to as the city sewer side of the valve system S, whereas the section of the valve system S located at the left of the separation wall 12 is referred to as the dwelling side of the valve system S. The flapper 22 has a normally closed position which is maintained by the forces of gravity and which is reinforced by the hydrodynamic forces of any back-up occurring on the city side 26 of the valve system S.
Therefore, the lower section 16 of the separation wall 12 acts as a one-way check valve adapted to protect the dwelling against sewer back-ups. The flapper 22 of this check valve will pivot along arrow 28 of Fig. 1 upon the impact thereon of waste flowing from the dwelling towards the city sewer thereby allowing for communication through the lower opening 20 between the dwelling and city sewer sides of the valve system S.
The upper section 14 of the separation wall 12 defines a circular upper opening 30 which is partly obstructed by a screen 32. A city float 34 and a dwelling float 36 which are provided respectively on the city sewer side and on the dwelling side of the valve system S are pivotally mounted to the separation wall 12, below the upper opening 30, so as to act as flappers each adapted to close the upper opening 30. In a normal position of the floats 34 and 36, as illustrated in Fig. 1, the upper opening 30 is not closed by either one of these floats 34 and 36, whereby the screen 32 allows for a free flow of sewer gases through the valve system S while protecting the dwelling against the entry of pests, such as rats, coming from the city sewer side 26 of the valve system S. The operation and use of both the city and dwelling floats 34 and 36 will be explained in details hereinafter.
As best seen in Figs. 1 and 2, the double-hinged flapper 22 comprises a circular plate 38 adapted to close the lower opening 20 and an intermediate hinge 40 which is hingedly connected at a lower end thereof to an upper end of the circular plate 38 and at an upper end thereof to the separation wall 12, above the lower opening 20 thereof. The use and operation of the one-way check valve provided by the flapper 22 will be described in details hereinafter.
~` 2os2084 The housing 10 includes a removable cover 42 which is secured thereto with screws with a gasket being provided between the cover 42 and a seat therefor defined on the upper end of the housing 10.
The removable cover 42 provides for a free access to the inside of the valve system S. A threaded opening 44 is defined in the cover 42 for the installation of a globe relief valve to allow for pressure release when the sewer line gets blocked. Indeed, with such a release valve, the existing pressure inside the line can be released, such as on the city side 26 of the valve system S. With this feature, a water line or an air line can be connected to the cover relief valve (or directly to threaded opening 44) for facilitating the cleaning of the sewer line and, in some cases, the unblocking thereof, thereby eliminating the requirement of a fish wire and allowing the sewer line to be unblocked without spillage of sewer water around the valve system S.
As mentioned hereinabove, the flapper 22 in its normal position closes the lower opening 20, whereas both the city and dwelling floats 34 and 36 allow for gaseous communication through the screen 32 between the dwelling and city sewer sides of the valve system S. However, when there are sewer back-ups, the one-way flapper 22 is forced towards the lower opening 20 of the lower section 16 of the separation wall 12 thereby preventing any sewer spillage through the lower opening 20 into the dwelling. Sufficient sewer back-ups will also cause the c ity f loat 3 4 to upwardly pivot along arrow 4 6 o:E
Fig. 1 towards the separation wall 12 so as to close the upper opening 30 and thus prevent sewer back-ups spillage through this upper opening 30 while also protecting the screen 32 against fouling. Indeed, a rising liquid (e.g. sewage) level on the city side of the valve system S initiates the closing of the city 2 0 ~ 2 0 ~ 4 float 34 with the hydrodynamic forces of the back-up flow completing the closing of the city float 34. The city float 34 returns to its normally open position under the influence of gravity when the liquid level subsides.
On the other hand, if there is an excessive flow of sewer waste water from the dwelling, the dwelling float 36 will pivot along arrow 48 towards the separation wall 12 so as to close the upper opening 30 and also to protect the screen 32 against fouling (for the same reasons as the city float 34).
The opening and closing actions of the dwelling float 36 are similar, if not identical, to those of the city float 34.
Now referring to Figs. 3 and 4, when it is desired to use a fish wire W for cleaning the valve system S and the sewage pipe on the city side 26 of the flapper 22, the fish wire W can be introduced from the dwelling side along arrow 50 of Fig. 3 through the lower opening 20 thereby causing the flapper 22 to pivot along arrow 52 (also of Fig. 3), whereby the fish wire W extends through the lower opening 20. The problem encountered with conventional back-up valves when the fish wire is removed therefrom is solved in the present invention by the double-hinged flapper 22 as, when the fish wire W is pulled back along arrow 54 of Fig. 4, the intermediate hinge 40 of the flapper 22 will move forward thereby lifting the circular plate 38 of the flapper 22 (wherein the circular plate 38 and the intermediate hinge 40 rotate in opposite directions) and thus allowing for the fish wire W to be pulled out from the lower opening 20. The flapper 22 then returns to its closed position (i.e. blocking the lower opening 20) under the influence of gravity.
In summary, the flapper 22 is a double-swiveled member which stays in a normally -- 2o~2u8~
closed position during the operation of the valve system S for protecting the dwelling against back-ups of the sewer. The flapper 22 will open on impact on the waste flowing from the dwelling. The city float 34 is a flapper equipped with a float which is normally open for allowing sewer gases to pass - through the valve system S at the upper opening 30 thereof, although this city float 34 will close the upper opening 30 under sufficient sewer back-up for preventing sewer spillage through the valve system S
into the dwelling and for preventing fouling of the screen 32. The dwelling float 36 is a flapper equipped with a float provided on the dwelling side of the valve system S and which normally stays open for allowing for the passage through the valve system S of the sewer gases, although the dwelling float 36 can close when there is excessive flow of waste water coming from the dwelling thereby protecting the screen 32 against fouling. The screen 32 allows for a free passage of the sewer gases while protecting the dwelling against intrusion of rats or other pests which would otherwise possibly pass through the valve system S from the city sewer towards the dwelling.
The present valve system S can be made completely out of plastic materials or cast iron with brass flappers, depending on local codes. The valve system S can be installed in existing houses or in new installations on the main sewer drain, right after the cleanout at the entrance.
The back water valve system S of the present invention is thus a one-way check valve adapted to be installed at the entrance of the city sewer system into the dwelling for providing protection against sewer back-ups while allowing for free circulation of the sewer gases through the valve system and while also providing constant protection against the entrance of pests into the dwelling. The - 20~2084 valve system S is designed so that the normal flow of the sewage remains unimpeded.
As mentioned hereinbefore, the present back water valve system S is a main back water valve which replaces the required plurality of secondary conventional valves used on each of a series of dwelling fixtures. Therefore, the valve system S
eliminates a large number of secondary valves thereby providing for substantial cost savings.
g
Claims (20)
1. A valve assembly for use on a sewage line or the like, comprising housing means defining sewage inlet and outlet openings adapted to be connected respectively to sewage inlet and outlet sections of the sewage line, one-way valve means and gas flow means being provided in said housing means between the inlet and outlet sections of the sewage line, said one-way valve means being adapted to allow for a flow through said housing means from the inlet section of the sewage line towards the outlet section thereof while preventing a back-up flow through said housing means from the outlet section of the sewage line towards the inlet section thereof, said gas flow means being located above said one-way valve means and being adapted to allow sewer gases to circulate through said housing means.
2. A valve assembly as defined in Claim 1, wherein said gas flow means comprise an upper opening means defined in a separation wall means provided in said housing means between the inlet and outlet sections of the sewage line.
3. A valve assembly as defined in Claim 2, wherein said upper opening means comprise first means to prevent rodents or the like to pass therethrough.
4. A valve assembly as defined in Claim 3, wherein said first means comprise screen means extending across said upper opening means.
5. A valve assembly as defined in Claim 1, 3 or 4, wherein said gas flow means comprise interruption means adapted to prevent gas flow through said housing means when an excessive sewage flow is delivered to said housing means by one of the inlet and outlet sections of the sewage line.
6. A valve assembly as defined in Claim 1, 3 or 4, wherein said gas flow means comprise interruption means adapted to prevent gas flow through said housing means when an excessive sewage flow is delivered to said housing means by the outlet section of the sewage line.
7. A valve assembly as defined in Claim 1, 3 or 4, wherein said gas flow means comprise interruption means adapted to prevent gas flow through said housing means when an excessive sewage flow is delivered to said housing means by the inlet section of the sewage line.
8. A valve assembly as defined in Claim 2, wherein said housing means comprise closure means adapted to close said upper opening means when an excessive sewage flow is delivered to said housing means by the inlet section of the sewage line.
9. A valve assembly as defined in Claim 2, wherein said housing means comprise closure means adapted to close said upper opening means when an excessive sewage flow is delivered to said housing means by the outlet section of the sewage line.
10. A valve assembly as defined in Claim 9, wherein said closure means are further adapted to close said upper opening means when an excessive sewage flow is delivered to said housing means by the inlet section of the sewage line.
11 11. A valve assembly as defined in Claim 8, 9 or 10, wherein said closure means comprise a float means provided in said housing means and adapted to close said upper opening means before a level of sewage reaches said upper opening means.
12. A valve assembly as defined in Claim 8, 9 or 10, wherein said closure means comprise a float means provided in said housing means and adapted to close said upper opening means before a level of sewage reaches said upper opening means, said float means being pivotally mounted to said separation wall means and being adapted to pivot upwards with a rising level of sewage until said float means closes said upper opening means.
13. A valve assembly as defined in Claim 1, wherein said one-way valve means comprise a lower opening means define in a separation wall means provided in said housing means between the inlet and outlet sections of the sewage line and also comprises a flapper means pivotally mounted to said wall means and adapted to close said lower opening means by gravity, said flapper means including a lower section for closing said lower opening means and an upper section pivotally mounted at upper and lower ends thereof respectively to said separation wall means and to an upper end of said lower section.
14. A valve assembly as defined in Claim 2, 3, 4, 8, 9 or 10, wherein said one-way valve means comprise a flapper means pivotally mounted to said wall means and adapted to close said lower opening means by gravity, said flapper means including a lower section for closing said lower opening means and an upper section pivotally mounted at upper and lower ends thereof respectively to said separation wall means and to an upper end of said lower section.
15. A valve assembly as defined in Claim 13, wherein said wall means at least opposite said flapper means is inclined, with respect to a vertical plane, downwardly towards a first side of said wall means carrying said flapper means, whereby said lower section of said flapper means normally closes said lower opening means.
16. A valve assembly as defined in Claim 15, wherein a cleaning wire or the like can be inserted through said lower opening means of said one-way valve means from a second side of said wall means opposite said first side thereof for cleaning at least one of the sewage line and the valve system extending on said first side of said wall means, wherein the cleaning wire causes an upward pivot of said flapper means and wherein the cleaning wire can then be easily withdrawn from said one-way valve means.
17. A conduit assembly for allowing sewer gases to flow in a sewage line or the like, comprising opposite first and second ends adapted to be fluidly connected at spaced apart locations on the sewage line, gas flow means being provided in said conduit means between said first and second ends thereof and above the sewage line and being adapted to allow sewer gases to circulate through said conduit means.
18. A conduit assembly as defined in Claim 17, wherein said gas flow means comprise a separation wall means extending in said conduit means, and an opening means defined in said wall means.
19. A conduit assembly as defined in Claim 18, wherein said opening means comprise means to prevent rodents or the like to pass therethrough.
20. A conduit assembly as defined in Claim 19, wherein said means comprise screen means extending across said opening means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2052084 CA2052084C (en) | 1991-09-23 | 1991-09-23 | Multi action back water valve system with rat protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2052084 CA2052084C (en) | 1991-09-23 | 1991-09-23 | Multi action back water valve system with rat protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2052084A1 CA2052084A1 (en) | 1993-03-24 |
| CA2052084C true CA2052084C (en) | 1995-08-01 |
Family
ID=4148431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2052084 Expired - Fee Related CA2052084C (en) | 1991-09-23 | 1991-09-23 | Multi action back water valve system with rat protector |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2052084C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2177679A1 (en) * | 2008-10-14 | 2010-04-21 | Kessel GmbH | Non-return valve |
-
1991
- 1991-09-23 CA CA 2052084 patent/CA2052084C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2177679A1 (en) * | 2008-10-14 | 2010-04-21 | Kessel GmbH | Non-return valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2052084A1 (en) | 1993-03-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |