CA2420444C - Sewer inspection chamber with backflow prevention valve and method and apparatus for installing valve in sewer inspection chamber - Google Patents
Sewer inspection chamber with backflow prevention valve and method and apparatus for installing valve in sewer inspection chamber Download PDFInfo
- Publication number
- CA2420444C CA2420444C CA002420444A CA2420444A CA2420444C CA 2420444 C CA2420444 C CA 2420444C CA 002420444 A CA002420444 A CA 002420444A CA 2420444 A CA2420444 A CA 2420444A CA 2420444 C CA2420444 C CA 2420444C
- Authority
- CA
- Canada
- Prior art keywords
- inspection chamber
- pin
- housing
- valve
- clip
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
- Pipe Accessories (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
An inspection chamber for use in sanitary sewer systems has an integral back-flow prevention valve. The valve can be installed through an access pipe with the inspection chamber in place underground. The valve does not interfere with the installation or removal of a plug in the inspection chamber during construction and inspection of the sewer system. The inspection chamber comprises a clip oriented to receive a valve member from the direction of an access port. The valve member comprises a pin connected to a flap member by a narrow bridge member. The flap member has a projecting handle member. An installation tool holds the valve member by the handle member and provides a tab which can be hammered downwardly to snap the pin into the clip thereby securing the valve member in the inspection chamber. An inspection chamber according to the invention avoids the necessity of providing a separate buried back-how prevention valve.
Claims (29)
1. An inspection chamber for a sanitary sewer system, the inspection chamber comprising:
a housing having inlet outlet and access ports for connecting inlet, outlet and access pipes, the access port in an upper portion of the housing oriented generally perpendicularly to each of the inlet and outlet ports; and, a flap valve in the housing, the flap valve comprising:
(i) a valve member comprising a transverse pin, a flap member attached to the pin and a handle member projecting from a central location on the flap member;
(ii) a clip for receiving the pin of the valve member and detachably retaining the pin in pivotal relation to the housing, the clip located below the access port and above the inlet port and oriented to receive the pin from a direction of the access port;
and, (iii) a sealing surface inside the housing around the inlet port;
the clip being so located that, when the pin of the valve member is received in the clip, the flap member bears against the sealing surface and is capable of blocking a flow of sewage from the outlet port through the inspection chamber and out the inlet port, the clip being configured to permit the valve member to pivot about the pin to permit liquids to flow from the inlet port, through the inspection chamber and out the outlet port;
wherein the inspection chamber housing is configured to permit the valve member to be introduced into the inspection chamber housing and retained therein after the inspection chamber housing has been installed by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
a housing having inlet outlet and access ports for connecting inlet, outlet and access pipes, the access port in an upper portion of the housing oriented generally perpendicularly to each of the inlet and outlet ports; and, a flap valve in the housing, the flap valve comprising:
(i) a valve member comprising a transverse pin, a flap member attached to the pin and a handle member projecting from a central location on the flap member;
(ii) a clip for receiving the pin of the valve member and detachably retaining the pin in pivotal relation to the housing, the clip located below the access port and above the inlet port and oriented to receive the pin from a direction of the access port;
and, (iii) a sealing surface inside the housing around the inlet port;
the clip being so located that, when the pin of the valve member is received in the clip, the flap member bears against the sealing surface and is capable of blocking a flow of sewage from the outlet port through the inspection chamber and out the inlet port, the clip being configured to permit the valve member to pivot about the pin to permit liquids to flow from the inlet port, through the inspection chamber and out the outlet port;
wherein the inspection chamber housing is configured to permit the valve member to be introduced into the inspection chamber housing and retained therein after the inspection chamber housing has been installed by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
2. An inspection chamber according to claim 1 wherein the handle member comprises a ring projecting generally perpendicularly to a plane bisecting the valve member.
3. An inspection chamber according to any one of claims 1 and 2 wherein the clip comprises first and second upwardly projecting resilient fingers, the first finger engaging one end of the pin and the second finger engaging another end of the pin.
4. An inspection chamber according to claim 3 comprising a notch extending between the fingers under the pin.
5. An inspection chamber according to claim 1 wherein the handle member is apertured.
6. A sanitary sewer system comprising:
a sewage outlet pipe extending from a building to a sewer main;
an inspection chamber connected in the sewage outlet pipe at an underground location between the building and the sewer main the inspection chamber comprising:
a housing having an inlet port connected to a portion of the sewage outlet pipe extending to the building, an outlet port connected to a portion of the sewage outlet pipe extending to the sewer main, an access port connected to an access pipe extending generally vertically to an unburied location, the access port in an upper portion of the housing and oriented generally perpendicularly to each of the inlet and outlet ports;
a flap valve in the housing, the flap valve comprising:
a valve member comprising a transverse pin, a flap member attached to the pin and a handle member projecting from a central location on the flap member;
a clip for receiving the pin of the valve member and detachably retaining the pin in pivotal relation to the housing, the clip located below the access port and above the inlet port and oriented to receive the pin from a direction of the access port, and a sealing surface inside the housing around the inlet port;
wherein, when the pin of the valve member is received in the clip, the flap member bears against the sealing surface and is capable of blocking a flow of sewage from the outlet port through the inspection chamber and out the inlet port and the valve member can pivot about the pin to permit sewage to flow from the inlet port, through the inspection chamber and out the outlet port;
and wherein the inspection chamber housing is configured to permit the valve member to he introduced into the inspection chamber housing and retained therein after the inspection chamber housing has been installed in the sanitary sewer system by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
a sewage outlet pipe extending from a building to a sewer main;
an inspection chamber connected in the sewage outlet pipe at an underground location between the building and the sewer main the inspection chamber comprising:
a housing having an inlet port connected to a portion of the sewage outlet pipe extending to the building, an outlet port connected to a portion of the sewage outlet pipe extending to the sewer main, an access port connected to an access pipe extending generally vertically to an unburied location, the access port in an upper portion of the housing and oriented generally perpendicularly to each of the inlet and outlet ports;
a flap valve in the housing, the flap valve comprising:
a valve member comprising a transverse pin, a flap member attached to the pin and a handle member projecting from a central location on the flap member;
a clip for receiving the pin of the valve member and detachably retaining the pin in pivotal relation to the housing, the clip located below the access port and above the inlet port and oriented to receive the pin from a direction of the access port, and a sealing surface inside the housing around the inlet port;
wherein, when the pin of the valve member is received in the clip, the flap member bears against the sealing surface and is capable of blocking a flow of sewage from the outlet port through the inspection chamber and out the inlet port and the valve member can pivot about the pin to permit sewage to flow from the inlet port, through the inspection chamber and out the outlet port;
and wherein the inspection chamber housing is configured to permit the valve member to he introduced into the inspection chamber housing and retained therein after the inspection chamber housing has been installed in the sanitary sewer system by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
7. A sewer system according to claim 6 wherein the handle member comprises a ring projecting generally perpendicularly to a plane bisecting the valve member.
8. A sewer system according to any one of claims 6 and 7 wherein the clip comprises first and second upwardly projecting resilient fingers, the first finger engaging one end of the pin and the second finger engaging another end of the pin.
9. A sewer system according to claim 8 comprising a notch under the pin and between the fingers.
10. A sewer system according to any one of claims 6 to 9 comprising a sealing lid at an upper end of the access pipe.
11. A sewer system according to claim 10 wherein the sealing lid comprises a plastic material having a piece of a ferromagnetic material moulded into the plastic material.
12. A sewer system according to claim 6 wherein the handle member is apertured.
13. An inspection chamber housing for use in a sanitary sewer system, the inspection chamber housing having inlet, outlet and access ports for receiving inlet, outlet and access pipes respectively, the access port in an upper portion of the housing oriented generally perpendicularly to each of the inlet and outlet ports;
the housing providing a sealing surface inside the housing around the inlet port;
the housing adapted, by the inclusion of a clip located below the access port and above the inlet port, to receive a flap to provide a flap valve within the housing, the clip oriented to receive a transversely-oriented pin inserted from a direction of the access port;
wherein the inspection chamber housing is configured to permit the valve member to be introduced into the inspection chamber housing and retained therein, after the inspection chamber housing has been installed, by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
the housing providing a sealing surface inside the housing around the inlet port;
the housing adapted, by the inclusion of a clip located below the access port and above the inlet port, to receive a flap to provide a flap valve within the housing, the clip oriented to receive a transversely-oriented pin inserted from a direction of the access port;
wherein the inspection chamber housing is configured to permit the valve member to be introduced into the inspection chamber housing and retained therein, after the inspection chamber housing has been installed, by introducing the valve member through the inlet port in a substantially linear downward motion to engage the pin with the clip and continuing to move the valve mechanism in the downward direction until the pin is retained by the clip.
14. An inspection chamber housing according to claim 13 wherein the clip comprises first and second upwardly-projecting fingers, the first finger capable of engaging one end of a pin and the second finger capable of engaging another end of the pin.
15. An inspection chamber housing according to claim 14 wherein the fingers are resilient.
16. An inspection chamber housing according to any one of claims 14 and 15 comprising a notch between the fingers.
17. An inspection chamber housing for use in a sanitary sewer system, the inspection chamber housing having inlet, outlet and access ports for receiving inlet, outlet and access pipes respectively, the access port in an upper portion of the housing oriented generally perpendicularly to each of the inlet and outlet ports;
the housing adapted to receive and retain a valve mechanism comprising a pivotable flap member by the provision in the housing of a pair of opposed vertically oriented guide elements proximate the inlet port, wherein the inspection chamber housing is configured to permit the valve mechanism to be introduced into the inspection chamber housing and retained therein by introducing the valve mechanism through the inlet port in a substantially linear downward motion to engage the guide elements and subsequently continuing to move the valve mechanism in the downward direction until it is retained within the inspection chamber housing.
the housing adapted to receive and retain a valve mechanism comprising a pivotable flap member by the provision in the housing of a pair of opposed vertically oriented guide elements proximate the inlet port, wherein the inspection chamber housing is configured to permit the valve mechanism to be introduced into the inspection chamber housing and retained therein by introducing the valve mechanism through the inlet port in a substantially linear downward motion to engage the guide elements and subsequently continuing to move the valve mechanism in the downward direction until it is retained within the inspection chamber housing.
18. An inspection chamber housing according to claim 17 wherein the guide elements comprise vertically oriented recesses.
19. An inspection chamber housing according to claim 18 wherein the vertically oriented recesses are each defined between a resilient finger and a portion of the housing.
20. An inspection chamber housing according to any one of claims 18 and 19 comprising a notch located between the vertically oriented recesses.
21. An inspection chamber housing according to any one of claims 17 to 20 comprising the valve mechanism engaged between the guide elements, the valve mechanism permitting sewage to flow in from the inlet port, through the inspection chamber and out the outlet port and blocking flow out through the inlet port.
22. An inspection chamber housing according to claim 21 wherein the valve mechanism comprises a transverse pin and a flap member attached to the pin.
23. An inspection chamber housing according to claim 22 wherein the valve mechanism comprises a handle member projecting from the flap member.
24. A method for using an inspection chamber in a sanitary sewer system, the method, comprising, detachably affixing a valve mechanism comprising a pivotable flap member to a tool comprising an elongated shaft;
lowering the valve mechanism through an access port of an inspection chamber and, in a vertical motion, engaging the valve mechanism between opposed vertically extending guide elements within the inspection chamber to provide a one-way valve within the inspection chamber; and, detaching the tool from the valve mechanism.
lowering the valve mechanism through an access port of an inspection chamber and, in a vertical motion, engaging the valve mechanism between opposed vertically extending guide elements within the inspection chamber to provide a one-way valve within the inspection chamber; and, detaching the tool from the valve mechanism.
25. A method according to claim 24 wherein the vertically extending guide elements comprise substantially vertical recesses and engaging the valve mechanism in the inspection chamber comprises sliding the valve mechanism into the recesses.
26. A method according to claim 25 wherein the recesses are each defined on one side thereof by a resilient finger.
27. A method according to any one of claims 24 to 26 wherein the valve mechanism comprises a transverse pin and engaging the valve mechanism in the inspection chamber comprises engaging the transverse pin with the guide elements.
28. A method according to any one of claims 24 to 27 wherein the valve mechanism comprises a handle projecting outwardly therefrom and detachably affixing the valve mechanism to the tool comprises detachably affixing the tool to the handle.
29. A method according to claim 28 wherein the handle is apertured and the method comprises subsequently removing the valve mechanism by engaging a hook with the apertured handle and pulling upwardly on the hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2420444A CA2420444E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with backflow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2420444A CA2420444E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with backflow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
| CA 2202214 CA2202214E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2202214 Division CA2202214E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| CA2420444A1 CA2420444A1 (en) | 1998-10-09 |
| CA2420444C true CA2420444C (en) | 2005-03-22 |
| CA2420444E CA2420444E (en) | 2010-05-25 |
Family
ID=4160377
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2420444A Expired - Lifetime CA2420444E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with backflow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
| CA 2202214 Expired - Lifetime CA2202214E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
| CA002419470A Expired - Lifetime CA2419470C (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2202214 Expired - Lifetime CA2202214E (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
| CA002419470A Expired - Lifetime CA2419470C (en) | 1997-04-09 | 1997-04-09 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
Country Status (1)
| Country | Link |
|---|---|
| CA (3) | CA2420444E (en) |
-
1997
- 1997-04-09 CA CA2420444A patent/CA2420444E/en not_active Expired - Lifetime
- 1997-04-09 CA CA 2202214 patent/CA2202214E/en not_active Expired - Lifetime
- 1997-04-09 CA CA002419470A patent/CA2419470C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2202214C (en) | 2004-01-06 |
| CA2202214A1 (en) | 1998-10-09 |
| CA2419470C (en) | 2005-12-20 |
| CA2420444A1 (en) | 1998-10-09 |
| CA2419470A1 (en) | 1998-10-09 |
| CA2420444E (en) | 2010-05-25 |
| CA2202214E (en) | 2010-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| NARE | Reissued | ||
| MKEX | Expiry |
Effective date: 20170410 |