WO2008153403A1 - Cover device for drainage inspection chambers - Google Patents

Cover device for drainage inspection chambers Download PDF

Info

Publication number
WO2008153403A1
WO2008153403A1 PCT/NO2007/000203 NO2007000203W WO2008153403A1 WO 2008153403 A1 WO2008153403 A1 WO 2008153403A1 NO 2007000203 W NO2007000203 W NO 2007000203W WO 2008153403 A1 WO2008153403 A1 WO 2008153403A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet
cover
cover device
drainage inspection
supporting member
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.)
Ceased
Application number
PCT/NO2007/000203
Other languages
French (fr)
Inventor
Jens Martin Storheil
Per Holten
Vilnis Puce
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pipelife Norge AS
Original Assignee
Pipelife Norge AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pipelife Norge AS filed Critical Pipelife Norge AS
Priority to EP07793888A priority Critical patent/EP2152979A4/en
Priority to PCT/NO2007/000203 priority patent/WO2008153403A1/en
Publication of WO2008153403A1 publication Critical patent/WO2008153403A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E03F5/021—Connection of sewer pipes to manhole shaft
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E03F5/027—The bottom made of prefabricated segments
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L45/00—Pipe units with cleaning aperture and closure therefor

Definitions

  • the invention relates to a cover device as described in the preamble of claim 1 for drainage inspection chambers, more precisely for drainage inspection chambers with two or more inlets, where, for one or more inlet opening(s), a cover device is releasably attached in the opening, to cover the opening so that the drainage chamber may be used without connection of inlets for this inlet opening(s) and may eventually be connected with (an) additional inlet(s) at a later stage.
  • Drainage chambers used in systems for effluent or out-flow are used with a varying number of inlets. It is usual to have one, two or three inlets and one outlet. This may be provided by making four variants, one right flow variant, one variant with three inlets and one outlet and two different right/left-variants with two inlets. This demands wide-ranging production equipment and needs space for storing different variants to solve varying needs. In total it increases the cost.
  • Drainage inspection chambers used with known cover devices are not beneficial with regard to flow characteristics. In addition they give the possibility for build up of litter in eddy producing corners, and in some cases form places for undesired animals, such as rats.
  • the main objective of the invention is to develop a cover device for a drainage inspection chamber, which is simple to mount and dismantle from the inside of the drainage inspection chamber. It is important that it is easy to dismantle when one is going to bring into use additional inlets on drainage inspection chambers that are already installed and in use. Further it is an objective to develop such a cover device that gives better hydraulic characteristics for a drainage inspection chamber in which one or more such cover devices are mounted. Such a cover device should only use a small amount of materials and have a low weight.
  • the invention is described in claim 1. With such a cover device the objectives of the invention may be achieved to a great extent. The most important advantage is operational, by the fact that it in all configurations gives a drainage inspection chamber without accumulation of mud or litter. On already installed drainage inspection chambers the new cover devices may be installed simply to improve the hydraulic characteristics, and prevent undesired animals from settling there.
  • the denotation "socket” shall in this connection be understood as a pipe structure which is arranged to be coupled together with a pipe end, either directly or with the help of a coupling element.
  • Fig. 1 shows a view in perspective of a drainage inspection chamber where the invention may be used
  • Fig. 2 shows a central sectional view through the drainage inspection chamber in Fig. 1 along the dotted line in Fig. 1.
  • Fig. 3 shows a view in perspective of a filling in element for use with a drainage inspection chamber as shown in Fig. 1 and 2.
  • Fig. 4 shows an additional view in perspective of the filling in element in Fig. 3.
  • Fig. 5 shows a detail of the filling in element of Fig. 3 and 4.
  • Fig. 1 and 2 show a drainage inspection chamber 11 with a cylindrical pipe shaped part 12 called a raise pipe or raise pipe socket, which is arranged with a vertical axis and which near its closed bottom 13 has three pipe sockets 14 - 16 for connection of an inlet pipe (not shown) and one pipe end or - socket 17 for a drainage pipe.
  • Each socket has an outer part adapted to receive a pipe end, and an inner and narrower part, with an intermediate step 31.
  • the pipe sockets 14 - 17 lie in the same plane with the three inlet sockets 14 - 16 arranged symmetrically around the axis defined by the outlet socket 17.
  • the two side pipe sockets 14 and 16 each make a 45° angle with the middle pipe socket 15. Other angles may be used. It may also occur that the side pipes lie a bit higher than the main channel in the drainage inspection chamber.
  • This drainage inspection chamber will have three inlet openings inside. Of these there are shown one central inlet opening 18 and one side opening 19 in Fig. 2. Inside the inlet sockets 14 - 16 and the outlet socket 17 are internally extending to a common ring 20 providing support (or engagement) for a mounted raise pipe inside the raise pipe socket 12.
  • Fig. 3 and 4 show a cover device or fill-in element 21 which is designed to be placed in the inlet socket 14 with insertion and extraction from the inner side of the drainage inspection chamber 11.
  • the fill-in element 21 has a plate formed cover part 22 which in contour is adapted to the inlet opening. This is not shown in Fig. 2, but it is symmetrical with the side opening 19.
  • the fill-in element 21 has in general an elliptic contour and it is curved in the height direction in accordance with the curl of the end of the inlet pipe socket which it shall lie near to and cover.
  • the cover part 22 is extended upwards with a gently sloping flange 22A.
  • the flange 22A has further a wing 23 which stands out sideways such that it in mounted position forms a contact face from the inside sideways against the ring 20.
  • the cover part 22 is integrated with a pipeline plug 25 which in dimension and position in relation to the cover part 22 is arranged to fit into the inlet pipe socket 14.
  • the diameter of the pipeline plug 25 is adapted to the opening of the inlet pipe socket 14 so that an easy sliding fit is provided.
  • a tongue 26 which extends towards the free end of the pipeline plug and which is radially elastic. By the outer free end 27 the tongue 26 has a protruding knob 28 with a sloping support surface 29.
  • Fig. 5 the tongue 26 is shown more in detail with a stick formed main part 30 which is elastic in the radial direction and at the end 27 carries the knob 28.
  • the knob 28 has an outwardly inclined face facing the cover part 22, so that it fits against the step 31 inside the pipe socket and so that it may slide more easily off this when it is pulled/pushed inwards when dismantling.
  • the fill-in element 21 which is made in similar symmetric manner for the opposite inlet pipe socket 16, may be put in place from inside the drainage inspection chamber and is then held in place by the pipeline plug 25 and tongue 27. With the fill-in element in this position the drainage inspection chamber 11 may be put in place and put to use with one or two of the inlet pipe sockets 14 - 16 connected to a pipe.
  • the fill-in element 21 may be pulled/pushed out of position and lifted away from inside the drainage inspection chamber.
  • a drainage inspection chamber may be used with one or two fill elements according to the invention.
  • the fill-in element may also be fastened with grasping legs, for example two, three or four legs, which expand in a ring out from the cover plate coaxially with the inlet pipe socket.
  • grasping legs must then have an outer surface which forms a supporting contact face against the inner part of the inside of the inlet socket. At least one of the grasping legs should have a radially protruding hook.
  • the cover members are integrated with a curved plate part which forms a part of a ring, and the cover members are delimited by weakening grooves for making openings, and where the curved plate part is arranged to form a supporting member against the adjacent parts of the inlet sockets.
  • the weakening grooves which are placed inside the openings of the inlet pipe sockets are designed for pressing out and/or cutting of the material which is delimited by each weakening groove, for the inlet pipe sockets which are going to be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Abstract

Cover device (21) for a drainage inspection chamber (11) with at least two inlet pipe sockets (14 - 16), of which at least one inlet pipe socket extends in an acute angle to a central axis. The cover device (21) has a cover member (22) which may be placed releasably fixed by an inlet so that it blocks leaks of liquid or mass which flows through the drainage inspection chamber. It comprises at least one supporting member (25) which is connected or integrated with the cover member (22), and may be put in engagement with an inlet pipe socket (14) from inside. The cover member (22) is mainly plate shaped with an oval shape.

Description

Cover device for drainage inspection chambers.
The invention relates to a cover device as described in the preamble of claim 1 for drainage inspection chambers, more precisely for drainage inspection chambers with two or more inlets, where, for one or more inlet opening(s), a cover device is releasably attached in the opening, to cover the opening so that the drainage chamber may be used without connection of inlets for this inlet opening(s) and may eventually be connected with (an) additional inlet(s) at a later stage.
Background
Drainage chambers used in systems for effluent or out-flow are used with a varying number of inlets. It is usual to have one, two or three inlets and one outlet. This may be provided by making four variants, one right flow variant, one variant with three inlets and one outlet and two different right/left-variants with two inlets. This demands wide-ranging production equipment and needs space for storing different variants to solve varying needs. In total it increases the cost.
In some cases flexibility is needed, mainly the possibility for extending to a larger number of inlets at a later stage. Up to now this has been solved by mounting of drainage inspection chambers with a maximum number of inlets, as the inlets that are not used from the start are blocked by seal assemblies mounted from the outside. These seal assemblies are intended for dismantling from the outside when extending to a larger number of inlets. Such drainage expansion chambers are for example described in the brochure "Kumsystemer" (in Norwegian) from Pipelife Norge AS, 2005.
Drainage inspection chambers used with known cover devices are not beneficial with regard to flow characteristics. In addition they give the possibility for build up of litter in eddy producing corners, and in some cases form places for undesired animals, such as rats.
Objective
The main objective of the invention is to develop a cover device for a drainage inspection chamber, which is simple to mount and dismantle from the inside of the drainage inspection chamber. It is important that it is easy to dismantle when one is going to bring into use additional inlets on drainage inspection chambers that are already installed and in use. Further it is an objective to develop such a cover device that gives better hydraulic characteristics for a drainage inspection chamber in which one or more such cover devices are mounted. Such a cover device should only use a small amount of materials and have a low weight.
The invention
The invention is described in claim 1. With such a cover device the objectives of the invention may be achieved to a great extent. The most important advantage is operational, by the fact that it in all configurations gives a drainage inspection chamber without accumulation of mud or litter. On already installed drainage inspection chambers the new cover devices may be installed simply to improve the hydraulic characteristics, and prevent undesired animals from settling there.
The denotation "socket" shall in this connection be understood as a pipe structure which is arranged to be coupled together with a pipe end, either directly or with the help of a coupling element.
More characteristics of the invention are depicted in claims 2 - 6.
Further details of the invention will appear from the following example description.
Example
The invention is more particularly described below with reference to the Figures where
Fig. 1 shows a view in perspective of a drainage inspection chamber where the invention may be used,
Fig. 2 shows a central sectional view through the drainage inspection chamber in Fig. 1 along the dotted line in Fig. 1.
Fig. 3 shows a view in perspective of a filling in element for use with a drainage inspection chamber as shown in Fig. 1 and 2. Fig. 4 shows an additional view in perspective of the filling in element in Fig. 3.
Fig. 5 shows a detail of the filling in element of Fig. 3 and 4.
Fig. 1 and 2 show a drainage inspection chamber 11 with a cylindrical pipe shaped part 12 called a raise pipe or raise pipe socket, which is arranged with a vertical axis and which near its closed bottom 13 has three pipe sockets 14 - 16 for connection of an inlet pipe (not shown) and one pipe end or - socket 17 for a drainage pipe. Each socket has an outer part adapted to receive a pipe end, and an inner and narrower part, with an intermediate step 31.
These four pipe sockets run together and form with their underside the bottom 13 which constitutes the flow channel in the drainage inspection chamber 11.
The pipe sockets 14 - 17 lie in the same plane with the three inlet sockets 14 - 16 arranged symmetrically around the axis defined by the outlet socket 17. The two side pipe sockets 14 and 16 each make a 45° angle with the middle pipe socket 15. Other angles may be used. It may also occur that the side pipes lie a bit higher than the main channel in the drainage inspection chamber.
This drainage inspection chamber will have three inlet openings inside. Of these there are shown one central inlet opening 18 and one side opening 19 in Fig. 2. Inside the inlet sockets 14 - 16 and the outlet socket 17 are internally extending to a common ring 20 providing support (or engagement) for a mounted raise pipe inside the raise pipe socket 12.
Fig. 3 and 4 show a cover device or fill-in element 21 which is designed to be placed in the inlet socket 14 with insertion and extraction from the inner side of the drainage inspection chamber 11. The fill-in element 21 has a plate formed cover part 22 which in contour is adapted to the inlet opening. This is not shown in Fig. 2, but it is symmetrical with the side opening 19. The fill-in element 21 has in general an elliptic contour and it is curved in the height direction in accordance with the curl of the end of the inlet pipe socket which it shall lie near to and cover.
The cover part 22 is extended upwards with a gently sloping flange 22A. The flange 22A has further a wing 23 which stands out sideways such that it in mounted position forms a contact face from the inside sideways against the ring 20.
The cover part 22 is integrated with a pipeline plug 25 which in dimension and position in relation to the cover part 22 is arranged to fit into the inlet pipe socket 14. The diameter of the pipeline plug 25 is adapted to the opening of the inlet pipe socket 14 so that an easy sliding fit is provided. In the wall of the pipeline plug 25 there is integrated a tongue 26 which extends towards the free end of the pipeline plug and which is radially elastic. By the outer free end 27 the tongue 26 has a protruding knob 28 with a sloping support surface 29. When mounting the tongues are pressed radially inwards so that they may be inserted in the opening of the inlet pipe socket 14 together with the pipeline plug 25.
In Fig. 5 the tongue 26 is shown more in detail with a stick formed main part 30 which is elastic in the radial direction and at the end 27 carries the knob 28. The knob 28 has an outwardly inclined face facing the cover part 22, so that it fits against the step 31 inside the pipe socket and so that it may slide more easily off this when it is pulled/pushed inwards when dismantling.
The fill-in element 21 which is made in similar symmetric manner for the opposite inlet pipe socket 16, may be put in place from inside the drainage inspection chamber and is then held in place by the pipeline plug 25 and tongue 27. With the fill-in element in this position the drainage inspection chamber 11 may be put in place and put to use with one or two of the inlet pipe sockets 14 - 16 connected to a pipe.
If at a later stage it should become necessary to extend the connection, the fill-in element 21 may be pulled/pushed out of position and lifted away from inside the drainage inspection chamber.
This solution gives several advantages. The most important is that it is not necessary to have different drainage inspection chambers in production and in store. Also when a drainage inspection chamber is to be established with permanent connections, without the need for later expansion, a drainage inspection chamber may be used with one or two fill elements according to the invention.
With one fill element according to the invention in place in the drainage inspection chamber, the flow conditions will only be changed a little. This means a minimal increase in the flow resistance and no room for deposit of waste. Neither will it give room for undesired animals.
Modifications The fill-in element may also be fastened with grasping legs, for example two, three or four legs, which expand in a ring out from the cover plate coaxially with the inlet pipe socket. Such grasping legs must then have an outer surface which forms a supporting contact face against the inner part of the inside of the inlet socket. At least one of the grasping legs should have a radially protruding hook.
In an alternative embodiment the cover members are integrated with a curved plate part which forms a part of a ring, and the cover members are delimited by weakening grooves for making openings, and where the curved plate part is arranged to form a supporting member against the adjacent parts of the inlet sockets. The weakening grooves which are placed inside the openings of the inlet pipe sockets are designed for pressing out and/or cutting of the material which is delimited by each weakening groove, for the inlet pipe sockets which are going to be used.

Claims

Claims
1. Cover device (21) for a drainage inspection chamber (11) with at least two inlet sockets (14 - 16) of which at least one inlet socket extends at an acute angle to a central axis, so that one or more inlet openings (19) are formed in the wall near the drainage inspection chambers (11) bottom (13), where there is in each inlet socket (14 - 16) formed a step (31) meant for insertion of the end of an inlet pipe, where the cover device (21) has a cover member (22) which may be placed releasably fixed by an inlet so that it blocks leaks of liquid and mass floating through the drainage inspection chamber, characterized in -that it consists of at least one supporting member (25) which is connected or integrated with the cover member (22), and which may be put in engagement with an inlet pipe socket (14) from inside, and -that the cover member (22) is mainly plate shaped with an oval shape.
2. Cover device according to claim 1 , characterized in that the supporting member (25) is pipe shaped for insertion in the inlet socket (14).
3. Cover device according to claim 2, characterized in that the supporting member (25) comprises two or more legs protruding from the cover plate.
4. Cover device according to one of the claims 1 to 3, characterized in that the supporting member (25) at least has one radially protruding knob (28) which in a radially elastic way may be pressed in and that in a locking manner can grip in a step (31) in the inlet pipe socket.
5. Cover device according to claim 4, characterized in that the protruding knob (28) is arranged on a longitudinal radial elastic leg (26) in the supporting member (25).
6. Cover device according to one of the claims 1 to 5, characterized in that the cover members are integrated to the curved plate part which forms a part of a ring and is delimited by weakening grooves for making openings, as the curved plate part is arranged to form a supporting member against the adjacent parts of the inlet sockets.
PCT/NO2007/000203 2007-06-12 2007-06-12 Cover device for drainage inspection chambers Ceased WO2008153403A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07793888A EP2152979A4 (en) 2007-06-12 2007-06-12 Cover device for drainage inspection chambers
PCT/NO2007/000203 WO2008153403A1 (en) 2007-06-12 2007-06-12 Cover device for drainage inspection chambers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2007/000203 WO2008153403A1 (en) 2007-06-12 2007-06-12 Cover device for drainage inspection chambers

Publications (1)

Publication Number Publication Date
WO2008153403A1 true WO2008153403A1 (en) 2008-12-18

Family

ID=40129899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2007/000203 Ceased WO2008153403A1 (en) 2007-06-12 2007-06-12 Cover device for drainage inspection chambers

Country Status (2)

Country Link
EP (1) EP2152979A4 (en)
WO (1) WO2008153403A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016191251A (en) * 2015-03-31 2016-11-10 アロン化成株式会社 Catch basin and drain pipe including the same
WO2022010347A1 (en) 2020-07-09 2022-01-13 Wavin B.V. An inspection chamber base or manhole base, an inspection chamber or manhole, a plug for an inspection chamber base or a manhole base

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112413276A (en) * 2020-11-17 2021-02-26 华北水利水电大学 Anti-clogging device for prestressed concrete cylinder pipes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1297562A (en) * 1970-02-12 1972-11-22
GB2099877A (en) * 1981-06-06 1982-12-15 Yorkshire Imperial Plastics Inspection chambers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1577987A (en) * 1978-04-03 1980-10-29 Wavin Bv Inspection chambers
GB2031480A (en) * 1978-07-24 1980-04-23 Hepworth Iron Co Ltd Manholes
AT400598B (en) * 1994-03-15 1996-01-25 Enichlmayr Josef Dipl Ing PLASTIC TUBE FOR CHANNELS
US5876282A (en) * 1997-07-24 1999-03-02 Kenny; Robert L. Weather cap
CN2905921Y (en) * 2005-01-13 2007-05-30 郑志亮 Anti-soil odour port
JP4145934B2 (en) * 2006-02-20 2008-09-03 株式会社オーティス 樋 Fitting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1297562A (en) * 1970-02-12 1972-11-22
GB2099877A (en) * 1981-06-06 1982-12-15 Yorkshire Imperial Plastics Inspection chambers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2152979A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016191251A (en) * 2015-03-31 2016-11-10 アロン化成株式会社 Catch basin and drain pipe including the same
WO2022010347A1 (en) 2020-07-09 2022-01-13 Wavin B.V. An inspection chamber base or manhole base, an inspection chamber or manhole, a plug for an inspection chamber base or a manhole base
NL2026036B1 (en) 2020-07-09 2022-03-15 Wavin Bv An inspection chamber base or manhole base, an inspection chamber or manhole, a plug for an inspection chamber base or a manhole base

Also Published As

Publication number Publication date
EP2152979A4 (en) 2011-12-21
EP2152979A1 (en) 2010-02-17

Similar Documents

Publication Publication Date Title
US5556231A (en) Severable leaching chamber with end cap
KR101147044B1 (en) Drain Traps
US5234018A (en) Sewer check valve and cleanout apparatus
JPS63503078A (en) Two-stage pump sampling device
GB2475297A (en) Clogging resistant drain
CN109000059A (en) Hose line and filter screen for hose line
EP2152979A1 (en) Cover device for drainage inspection chambers
US591067A (en) Automatic siphoning device
CN102439238A (en) Water drain siphon device, in particular for floor showers and shower trays
CN108374467A (en) Floor mounted toilet with adjustable trapway for connection to wall mounted carrier
EP3102745B1 (en) Plumbing device
CN106321869A (en) Installing structure of sealing ring
US20170051482A1 (en) Trap integrated drain device for washbasin
CN110878583B (en) Pre-buried system of bathroom caisson secondary drainage floor drain
US4215724A (en) Backflow preventer for sewer system
US1007463A (en) Plumbing structure.
WO2015159203A1 (en) Waste water pump lying dry in a liquid tight insert which can be removably lowered into a sump
EP4179162B1 (en) An inspection chamber base or manhole base and an inspection chamber or manhole
US1147664A (en) Closet installation and fixture.
KR100478013B1 (en) The water inflow pipe with control function of high and low
KR20160003586U (en) A drain connection for washstand
CN110043701B (en) Fluid line insert
KR200395112Y1 (en) A Trap Structure Arranged In The Drainage Of A Washstand
TWI696742B (en) Storage tank
KR100836801B1 (en) Groundwater discharge device with backflow prevention function

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07793888

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2007793888

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE