NIJHOF, Jered (Dellenweg 2, AK Epe, NL-8161, NL)
| Claims
1 . Waste pipe having a circumferential wall which with an inner surface thereof defines a flow passage for liquids, wherein the waste pipe comprises a partial closure which, at least in a substantially lying position of use of the waste pipe, closes off an upper or lower part of the waste pipe, wherein the partial closure, in a horizontal direction considered in the lying position of use, at least partially extends in a longitudinal direction of the waste pipe, characterised in that the partial closure, at least near the upper or lower part of the waste pipe, is concave on either side.
2. Waste pipe according to claim 1 , wherein the partial closure, at least considered in horizontal direction, is at least partially placed inclined with respect to the longitudinal direction of the waste pipe.
3. Waste pipe according to claim 1 , wherein the partial closure with a first side connects to a first side wall of the inner surface of the waste pipe and with a second side connects to a second side wall of the inner surface of the waste pipe, said second side wall being situated substantially opposite the first side wall, wherein the first and second side are placed spaced apart from each other in longitudinal direction of the waste pipe.
4. Waste pipe according to claim 3, wherein the first and second side wall of the inner surface of the waste pipe are situated substantially opposite each other and/or on either side in the waste pipe.
5. Waste pipe according to claim 3 or 4, wherein the first side and the first side wall of the inner surface enclose an acute angle and/or wherein the second side and the second side wall of the inner surface enclose an acute angle.
6. Waste pipe according to claim 3 or 4, wherein the first side is placed at an upstream side of the second side, and wherein, at least considered in flow direction, the first side is concave and the second side is convex.
7. Waste pipe according to claim 6, wherein the first side substantially tangentially connects to the first side wall of the inner surface and/or wherein the second side substantially tangentially connects to the second side wall of the inner surface.
8. Waste pipe according to any one of the preceding claims, wherein a thickness of the partial closure, at least its part situated near the inner surface of the pipe, increases in the direction of the inner surface.
9. Waste pipe according to any one of the preceding claims, wherein the partial closure is a first partial closure which, at least in a the lying position of use of the waste pipe, closes off an upper part of the waste pipe, wherein the waste pipe further comprises a second partial closure which in the longitudinal direction is placed spaced apart from the first partial closure, and which at least in the position of use of the waste pipe, closes off a lower part of the waste pipe, wherein, at least in the position of use of the waste pipe considered in a horizontal direction, the first and second partial closure overlap.
10. Waste pipe according to claim 9, wherein the second partial closure, at least near the upper part of the waste pipe, is concave on either side.
1 1. Waste pipe according to claims 9 or 10, wherein the first partial closure, at least near the lower part of the waste pipe, substantially tangentially connects to the inner surface and/or wherein the second partial closure, at least near the upper part of the waste pipe, substantially tangentially connects to the inner surface.
12. Waste pipe according to claim 9, 10 or 1 1 , wherein the first and second partial closures run substantially parallel to each other.
13. Waste pipe according to any one of the claims 9-12, wherein the first and/or the second partial closure comprise a helical surface that faces upstream.
14. Composite waste pipe, comprising a first and a second pipe member, wherein each pipe member comprises a circumferential wall which with an inner surface thereof defines a flow passage for liquids, wherein the pipe member comprises a partial closure which, at least in a substantially lying position of use of the waste pipe, closes off an upper or lower part of the waste pipe, wherein the partial closure, in a horizontal direction considered in the lying position of use, extends at least partially in longitudinal direction of the waste pipe, characterised in that the partial closure, at least near the lower or upper part of the waste pipe is concave on either side, and wherein the first and second pipe member are placed connected and in line with each other, and wherein, at least in a substantially lying position of use of the assembly, the partial closure of the first pipe member closes off an upper part of the composite waste pipe, the partial closure of the second pipe member closes off a lower part of the composite waste pipe, wherein partial closure of the first and second pipe member overlap, considered in a horizontal direction.
15. Composite waste pipe according to claim 14, wherein, considered in the horizontal direction, the first and/or the second partial closure is, at least partially, placed inclined with respect to a longitudinal direction of the composite waste pipe.
16. Composite waste pipe according to claim 14 or 15, wherein the first and second pipe member are substantially identical and identically shaped, and wherein the second pipe member is rotated with respect to the first pipe member at an angle of substantially 180 degrees about a centre line of the composite waste pipe.
17. Composite waste pipe according to claim 14, 15 or 16, wherein the partial closure of the first pipe member forms a first partial closure, wherein the partial closure of the second pipe member forms a second partial closure, and further comprising one or more of the measures as described per se in the claims 2-12.
18. Drain device comprising a drainage channel comprising a bottom wall and upright longitudinal side walls, wherein at least in one of the longitudinal side walls a waste is placed, wherein in the drainage channel a cap is placed having a wall closing off an upper part of the waste and wherein the wall is provided with an edge facing the bottom wall which edge is placed spaced apart from the bottom wall, wherein connecting to the waste a waste pipe according to claim 1 has been placed, wherein the partial closure closes off a lower part of the waste pipe, and wherein, at least in a substantially lying position of use of the drain device, the edge of the cap and the partial closure of the waste pipe overlap, considered in a horizontal direction.
19. Drain device according to claim 18, wherein the wall of the cap is placed between the longitudinal side walls, preferably spaced apart from the passage opening.
20. Drain device comprising a waste water tray or floor drain having a bottom wall and a rising side wall, wherein the side wall is provided with a waste, and wherein within the side wall a cap is placed for at least at the upper side closing off the waste, wherein the cap is placed spaced apart from the bottom wall for providing a flow-through opening between the cap and the bottom wall, wherein connecting to the waste a waste pipe according to claim
1 has been placed, wherein the partial closure closes off a lower part of the waste pipe, and wherein, at least in a substantially lying position of use of the drain device, the edge of the cap and the partial closure of the waste pipe overlap, considered in a horizontal direction.
21. Drain device comprising: a first and a second pipe member, each having a circumferential wall which with an inner surface thereof defines a flow passage for liquids, and a connecting part arranged between the pipe members, wherein the connecting part defines a flow passage which with an inlet opening connects to a lower part of the first pipe member and with an outlet opening connects to an upper part of the second pipe member, wherein, at least in a substantially lying position of use of the waste pipe, the inlet opening and the outlet opening do not overlap considered in horizontal direction.
22. Drain device according to claim 21 , wherein the first and second pipe member, considered in horizontal direction, are placed substantially adjacent to each other, wherein the inlet opening is placed at a lower part of the circumferential wall of the first pipe member, and the outlet opening is placed at an upper part of the circumferential wall of the second pipe member.
23. Drain device according to claim 23, wherein the first opening, the second opening and the flow passage extend in a longitudinal direction of the pipe members.
24. Drain device according to claim 22 or 23, wherein the first pipe member comprises a first and second end, wherein the first opening is placed between the first and second end of the first pipe member, wherein the first end of the first pipe member comprises an inlet opening and wherein the second end of the first pipe member comprises a partial closure, and wherein the second pipe member comprises a first and second end, wherein the second opening is placed between the first and second end of the second pipe member, wherein the first end of the second pipe member comprises a partial closure and wherein the second end of the second pipe member comprises an outlet opening.
25. Waste pipe, drain device, composite waste pipe or pipe member provided with one or more of the characterising measures described in the attached description and/or shown in the attached drawings.
26. Method provided with one or more of the characterising measures described in the attached description and/or shown in the attached drawings. |
Waste pipe with stench trap
BACKGROUND OF THE INVENTION
The invention relates to a waste pipe for draining off a liquid, and particularly to a waste pipe for draining off waste water, wherein at its inside the waste pipe is provided with means for forming a water seal when in a substantially lying position of use of the waste pipe.
British patent application 2 353 298 describes a stench trap for waste water or the like comprising a tubular portion having a first {upstream) end and a second (downstream) end. The first end then comprises a first partial closure closing off an upper region of the tubular portion, and the second end comprises a second partial closure which closes off a lower region of the waste pipe, wherein, considered in a horizontal direction, the first and second partial closure overlap. Said stench trap is placed in a waste pipe of a waste water tray.
During use for draining off waste water, the tubular portion will be filled with waste water until said waste water spills over the edge of the second partial closure. The level of the waste water in the tubular portion is now so high that the first partial closure closes off the space in the tubular portion above the water level, as a result of which a so- called water seal is formed.
A comparable stench trap, but then designed double, is known from European patent application 1 566 497.
A drawback of said known stench traps is that the discharging capacity is limited.
It is an object of the invention to provide a waste pipe including stench trap having an improved discharging capacity with respect to a waste pipe having a comparable diameter provided with one of the known stench traps discussed above.
SUMMARY OF THE INVENTION
In order to at least partially achieve said object the invention according to a first aspect provides a waste pipe as described in claim 1. As the partial closure according to the invention, at least near the lower or upper part of the waste pipe, is concave on either side, a smoother transition between the partial closure and the inner wall of the waste pipe is achieved, both at the upstream and at the downstream side of the partial closure, as a result of which the flow resistance is considerably reduced and the discharging capacity increased.
In one embodiment the partial closure, considered in the horizontal direction, is at least partially placed inclined with respect to the longitudinal direction of the waste pipe. The more inclined the partial closures are placed in the waste pipe, the larger the passage opening at the first and/or second partial closure will become. However, the more inclined the partial closures, the longer the waste pipe with stench trap will become. Preferably a compromise will have to be found as regards the incline of the partial closure, so that a sufficiently large discharging capacity can be achieved with an as short as possible length of the waste pipe with stench trap.
One embodiment is characterised in that the partial closure with a first side connects to a first side wall of the inner surface of the waste pipe and with a second side connects to a second side wall of the inner surface of the waste pipe, said second side wall being situated substantially opposite the first side wall, wherein the first and second side are placed spaced apart from each other in the longitudinal direction of the waste pipe. Said distance, which does not equal zero, defines the incline of the partial closures.
In one embodiment the first and second side wall of the inner surface of the waste pipe are situated substantially opposite each other and/or on either side in the waste pipe.
In one embodiment the first side and the first side wall of the inner surface enclose an acute angle. In one embodiment the second side and the second side wall of the inner surface enclose an acute angle. Both embodiments can also be combined.
In one embodiment the first side is placed at an upstream side of the second side, and at least considered in flow direction, the first side is concave and the second side is convex. In this way a smoother transition from the side wall of the waste pipe to the partial closure is obtained, as a result of which the flow resistance is further reduced.
In one embodiment the first side substantially tangentially connects to the first side wall of the inner surface. In one embodiment the second side substantially tangentially connects to the second side wall of the inner surface. Both embodiments can also be combined. With this embodiment the flow resistance can be further reduced.
In one embodiment the partial closure, at least near the inner surface of the waste pipe, substantially tangentially connects to said inner surface. In this way the flow resistance can be further reduced at both the upstream and the downstream side.
In one embodiment a thickness of the partial closure, at least its part situated near the inner surface of the pipe, increases in the direction of the inner surface. An advantageous embodiment is provided with hollow partial closures, that are open towards the outer side of the pipe, as a result of which this embodiment can be made by means of an injection moulding process. In that way manufacturing also takes less material.
In one embodiment the partial closure is a first partial closure which, at least in a position of use of the waste pipe, closes off an upper part of the waste pipe, wherein the waste pipe further comprises a second partial closure which in the longitudinal direction is placed spaced apart
from the first partial closure, and which at least in the position of use of the waste pipe, closes off a lower part of the waste pipe, wherein, at least in the position of use of the waste pipe considered in a horizontal direction, the first and second partial closure overlap. In one embodiment the second partial closure as well, at least near the upper part of the waste pipe, is concave on either side.
Because the first and/or second partial closure, considered in a horizontal cross-section of the lying position of use, at least partially extend in longitudinal direction of the waste pipe, and particularly the edges thereof that limit the partial closure, it is achieved that the surface of the part of the waste pipe that is not closed off by the first and/or second partial closure, can be larger as a result of which the discharging capacity of the stench trap according to the invention can be increased, whereas the height of the partial closure remains the same.
In one embodiment the first partial closure, at least near the lower part of the waste pipe, substantially tangentially connects to the inner surface. In one embodiment the second partial closure, at least near the upper part of the waste pipe, substantially tangentially connects to the inner surface. Both embodiments can be combined. In that way the flow resistance at both the upstream and the downstream side can be further reduced.
In one embodiment the first and second partial closure run substantially parallel to each other.
In one embodiment the first and/or the second partial closure comprise a helical surface that faces upstream. . At an upstream end of the surface of the partial closure that faces upstream, said surface abuts the side wall of the inner wall of the waste pipe substantially parallel. Near a downstream end of the surface of the partial closure that faces upstream, said surface connects to the inner wall of the waste pipe at an angle. Between the upstream and downstream end the surface of the partial closure rotates in a helical manner. Due to said helical partial closure an optimal flow-through of the stench trap is achieved. When the length of such a partial closure is longer than 6 to 7 times the inner
diameter of the pipe, the flow resistance of the closing wall in the pipe is negligibly small, as a result of which an optimal throughput can be achieved.
In one embodiment the upstream end of the partial closure is placed substantially vertical and the partial closure near the downstream end is placed substantially horizontal, at least in the substantially lying position of use of the waste pipe with stench trap.
In one embodiment the partial closure is placed near the downstream end substantially transverse to the inner wall of the waste pipe.
According to a second aspect the invention provides a composite waste pipe, comprising a first and a second pipe member, each having a circumferential wall which with an inner surface thereof defines a flow passage for liquids and having a partial closure which closes off a part of the pipe member and leaving a passage opening free between the partial closure and the circumferential wall, wherein the first and second pipe member are placed connected and in line with each other, and wherein at least in a position of use of the assembly, the partial closure of the first pipe member closes off an upper part of the composite waste pipe, the partial closure of the second pipe member closes off a lower part of the composite waste pipe, wherein, considered in a horizontal direction, partial closure of the first and second pipe member overlap, and wherein, considered in the horizontal direction, the first and/or the second partial closure is, at least partially, placed inclined with respect to a longitudinal direction of the composite waste pipe, and wherein the partial closures, at least near a side thereof that faces away from a passage opening, is concave on either side.
In one embodiment the first and second pipe member are substantially identical and identically shaped. In one embodiment the second pipe member is placed rotated with respect to the first pipe member at an angle of substantially 180 degrees about a centre line of the composite waste pipe. In the production only one type of pipe member is manufactured. By combining at least two of said pipe members a waste
pipe having a stench trap can be created. Moreover the two pipe members can be connected to one another via a bend placed therebetween, for instance a 180 degree bend, resulting in a reduction of the build-in length, at the expense of a substantially double width of the waste.
in one embodiment the partial closure of the first pipe member forms a first partial closure, the partial closure of the second pipe member forms a second partial closure, and the embodiment comprises one or more of the measures as described per se above.
According to a third aspect the invention provides a drain device comprising a drainage channel comprising a bottom wall and upright longitudinal side walls, wherein at least in one of the longitudinal side walls a waste is placed, wherein in the drainage channel a cap is placed having a wall closing off an upper part of the waste and wherein the wall is provided with an edge facing the bottom wall which edge is placed spaced apart from the bottom wall, wherein connecting to the waste a waste pipe as described above has been placed, wherein the partial closure closes off a lower part of the waste pipe, and wherein, at least in a substantially lying position of use of the drain device, the edge of the cap and the partial closure of the waste pipe overlap, considered in a horizontal direction. Due to this combination a part of the stench trap is placed in the drain and another part in the waste pipe that is connected to the waste. By placing at least a part of the stench trap outside of the drain, the drain can be made very narrow. By placing a part of the stench trap in the drain, wherein said part preferably is detachably placed in the drain, the stench trap is better accessible for maintenance and/or cleaning,
In one embodiment the wall of the cap is placed between the longitudinal side walls, preferably spaced apart from the' passage opening.
A comparable drain device can also be created by combining a waste water tray or floor drain comprising a bottom wall and a rising side wall, wherein the side wall is provided with a waste, and wherein within the side wall a cap is placed for at least at the upper side closing
off the waste, wherein the cap is placed spaced apart from the bottom wall for providing a flow-through opening between the cap and the bottom wall, wherein connecting to the waste a waste pipe as described above has been placed, wherein the partial closure closes off a lower part of the waste pipe, and wherein, at least in a substantially lying position of use of the drain device, the edge of the cap and the partial closure of the waste pipe overlap, considered in a horizontal direction.
According to a fourth aspect the invention provides a waste pipe having a circumferential wall which with an inner surface thereof defines a flow passage for liquids, in longitudinal direction of the waste pipe consecutively comprising a first partial closure which, at least in a substantially lying position of use of the waste pipe, closes off an upper part of the waste pipe, and a second partial closure which in the longitudinal direction is placed spaced apart from the first partial closure, and which at least in the position of use of the waste pipe, closes off a lower part of the waste pipe, wherein at least in the position of use of the waste pipe considered in a horizontal direction, the first and second partial closure overlap, wherein the first and/or the second partial closure with a first side connect to a first side wall of the inner surface of the waste pipe and with a second side connect to a second side wall of the inner surface of the waste pipe, said second side wall being situated substantially opposite the first side wall, wherein the first and second side are placed spaced apart from each other in the longitudinal direction.
According to a fifth aspect the invention provides a drain device comprising: a first and a second pipe member, each having a circumferential wall which with an inner surface thereof defines a flow passage for liquids, and a connecting part arranged between the pipe members, wherein the connecting part defines a flow passage which with an inlet opening connects to a lower part of the first pipe member and
with an outlet opening connects to an upper part of the second pipe member, wherein, at least in a substantially lying position of use of the waste pipe, the inlet opening and the outlet opening do not overlap considered in horizontal direction.
In one embodiment the first and second pipe member, considered in horizontal direction, are placed substantially adjacent to each other, wherein the inlet opening is placed at a lower part of the circumferential wall of the first pipe member, and the outlet opening is placed at an upper part of the circumferential wall of the second pipe member. In one embodiment the first opening, the second opening and the flow passage extend in a longitudinal direction of the pipe members.
In one embodiment the first pipe member comprises a first and second end, wherein the first opening is placed between the first and second end of the first pipe member, wherein the first end of the first pipe member comprises an inlet opening and wherein the second end of the first pipe member comprises a partial closure, and the second pipe member comprises a first and second end, wherein the second opening is placed between the first and second end of the second pipe member, wherein the first end of the second pipe member comprises a partial closure and wherein the second end of the second pipe member comprises an outlet opening.
The aspects and measures described in this description and the claims of the application and/or shown in the drawings of this application may where possible also be used individually. Said individual aspects may be the subject of divisional patent applications relating thereto. This particularly applies to the measures and aspects that are described per se in the sub claims.
SHORT DESCRIPTION OF THE DRAWINGS
The invention will be elucidated on the basis of a number of exemplary embodiments shown in the attached drawings, in which:
Figure 1 A shows a schematic view in cross-section of a first example of a waste pipe;
Figure 1 B shows a schematic view in cross-section of the waste pipe of figure 1A along the line l-l;
Figure 2A shows a schematic view at a head end side of an exemplary embodiment of a pipe member according to the invention;
Figures 2B and 2C show schematic views in cross-section of the pipe member of figure 2A along the lines Ill-Ill and IV-IV, respectively;
Figures 3A-3J show various views in cross-section of figure 2C # along the lines A-J, respectively;
Figure 4A shows a schematic bottom view of a further exemplary embodiment of a pipe member according to the invention;
Figure 4B shows a schematic side view in cross-section of figure 4A along the line V-V;
Figure 5A shows a schematic side view of the exemplary embodiment of a pipe member according to figure 4;
Figure 5B shows a schematic side view in cross-section of figure 5A along the line Vl-Vl;
Figure 6A shows a schematic top view of an exemplary embodiment of a composite waste pipe according to the invention;
Figure 6B shows a schematic side view in cross-section of figure 6A along the line VII-VH;
Figure 7 shows a schematic side view in cross-section of a further exemplary embodiment of a composite waste pipe according to the invention;
Figure 8 shows a schematic top view in cross-section, of a further exemplary embodiment of a waste pipe according to the invention;
Figure 9A shows a schematic view in cross-section of figure 8, along the line VIII-VIII;
Figure 9B shows a schematic view in cross-section of figure 8, along the line IX-IX;
Figure 9C shows a schematic view in cross-section of figure 8, along the line X-X;
Figure 10 shows a schematic view of an exemplary embodiment of a drain device according to the invention;
Figure 1 1 shows a schematic side view in cross-section of a washbasin with a waste pipe according to the invention;
Figure 12 shows a schematic side view in cross-section of a shower tray with a waste pipe according to the invention;
Figure 13 shows a schematic top view of a washbasin with a sixth exemplary embodiment of a composite waste pipe according to the invention,
Figure 14 shows a schematic view of a drain device comprising a drainage channel having a waste pipe according to the invention; and
Figure 15 shows a schematic view in cross-section of the drain device according to figure 14.
DETAILED DESCRIPTION OF THE DRAWINGS
A first example of a waste pipe 1 , as shown in the figures 1 A and 1 B, comprises a substantially straight cylindrical waste pipe 2, which in the position of use is placed substantially lying. In longitudinal direction of the waste pipe 2 successively a first partial closure 4 which, in the substantially lying position of use of the waste pipe 2, closes off an
upper part of the waste pipe 2, and a second partial closure 5 which in the longitudinal direction is placed spaced apart from the first partial closure 4, and which in the position of use of the waste pipe 2 closes off a lower part of the waste pipe 2. The first 4 and second 5 partial closures are formed by substantially flat walls having a substantially constant thickness. In the position of use as shown in figure 1A, the first 4 and second 5 partial closures overlap one another partially, at least considered in a horizontal direction. Considered in the horizontal direction, as shown in the top view of figure 1 B, the first 4 and the second 5 partial closure are placed inclined with respect to the longitudinal direction I of the waste pipe 2. The centre line 3 of the waste pipe 2 and each of the two partial closures 4, 5 enclose an angle a that is smaller than 90 degrees, preferably smaller than 60 degrees, preferably even smaller than 45 degrees.
Due to the inclined placement of the first 4 and second 5 partial closure, the surface of the opening below the first partial closure 4 and above the second partial closure 5 will be larger than when the partial closures would be placed substantially transverse to the longitudinal direction I of the pipe 2, as is the case in the known stench traps. Due to said larger openings a greater discharging capacity can be achieved.
During installation the waste pipe 2 is placed substantially horizontally, wherein a first side 6 is connected to a waste of a floor drain, washbasin, bath, shower tray, sink, toilet and the like. At a second side 7 the waste pipe 2 is subsequently connected to the sewer system. In use liquids, such as water, will flow via the waste to the waste pipe 2, passing beneath the first partial closure 4. The liquid will be stopped by the second partial closure 5, and the waste pipe 2 will be filled until the water level reaches the upper edge 8 of the second partial closure 5. The lower edge 9 of the first partial closure 4 then is below the water level, thus forming a water seal. When liquid further to be drained off flows into the waste pipe 2, the liquid will flow over the upper edge 8 of the second partial closure 5 to the sewer system.
A second example describes an embodiment of a waste pipe 21 according to the invention, as shown in figures 2A, 2B and 2C, also comprises a substantially straight cylindrical waste pipe 22, which in
the position of use is placed substantially lying, as shown in the side view in cross-section of figure 2B. The waste pipe 22 comprises a partial closure 24 which closes off the lower part of the waste pipe 22.
In said second exemplary embodiment the thickness of the partial closure 24 decreases in the direction of the upper edge 28. The partial closure 24 is particularly formed concave on either side, as shown in the views in cross-section of figures 3A-3J. As a result the partial closure 24 obtains a hydrodynamic shape, as a result of which the flow resistance in the pipe 22 can be considerably reduced, and as a result of which the liquid due to the shape of the partial closure 24 is guided over the edge 28. Apart from by the inclined placement of the partial closure 24, the discharging capacity of this exemplary embodiment is further increased by the hydrodynamic shape of the partial closure 24.
In figures 2 and 3 the location where the upstream side of the partial closure 24 connects to the inner wall of the waste pipe 22 is indicated by reference number 25, and the location where the downstream side of the partial closure 24 connects to the inner wall of the waste pipe 22 is indicated by reference number 26.
When in use, for forming a stench trap, two or more of the waste pipes 22 will be connected in series, wherein a second waste pipe 22 adjacent to a first waste pipe 22, is rotated with respect to the first waste pipe at an angle of substantially 180 degrees about the centre line of the cylindrical waste pipe 22, in accordance with the embodiment as shown in figures 6 or 7, as described below in more detail.
A third example describes a further embodiment of a waste pipe 31 according to the invention, as shown in the figures 4A, 4B, 5A and 5B, also comprises a substantially straight cylindrical waste pipe 32, which in the position of use is placed substantially lying, as shown in the side view in cross-section of figures 4B and 5A. The waste pipe 32 comprises a partial closure 44 which is integrally formed in the waste pipe 32 and closes off a lower part of the waste pipe 32.
In said third exemplary embodiment the thickness of the partial closure 34 decreases in the direction of an upper edge 38. The partial closure 34 is particularly formed hydrodynamic on either side, as a result of which the flow resistance in the pipe 32 can be considerably reduced, and as a result of which due to the shape of the partial closure 34 the liquid is guided over the edge 38. Apart from by the inclined placement of the partial closure 34 as shown in figure 5B, the discharging capacity of this exemplary embodiment is further increased by the hydrodynamic shape of the partial closure 24 as shown in figure 4B.
In the figures 4A and 5A it is schematically shown that the partial closure 34 is a substantially hollow wall, wherein the hollow wall is open towards the outer side of the pipe 32, and wherein the hollow wall is provided with reinforcement ribs 35, which preferably extend in longitudinal direction of the pipe 32.
In use, for forming a stench trap, two or more of the waste pipes 32 will be coupled in series with substantially coinciding centre lines, wherein a second waste pipe 32 adjacent to a first waste pipe 32, is rotated with respect to the first waste pipe at an angle of substantially 180 degrees about the centre line of the cylindrical waste pipe 32, in accordance with the embodiment as shown in figures 6 or 7, as described below in more detail.
For the coupling the waste pipe 32 is provided with a coupling sleeve 36 at one first end, wherein the coupling sleeve 35 has an inner diameter that is substantially equal to the outer diameter of a second end 37 facing away from the coupling sleeve 36. In order to ensure that in an assembly as shown in figures 6 or 7 the first and second waste pipe 32 have a correct orientation with respect to each other, the coupling sleeve 36 is provided with first aligning means 361 and near the second end 37 the pipe 32 is provided with second aligning means 371 cooperating with the first aligning means. In the exemplary embodiment of figures 4 and 5 the second aligning means comprise a cam 371 placed on the outer circumference of the pipe 32, and the first aligning means comprise a recess 361 for receiving the cam 371 therein. When the cam 371 of a first waste pipe 32 is placed in the recess 361 of a second waste pipe 32, as shown in figures 6 and 7,
the first waste pipe is rotated at an angle of substantially 180 degrees with respect to the second waste pipe. Such a cam 371 and recess 361 assembly is also called index.
During the installation a first waste pipe 42 and a second waste pipe 52 are coupled to each other as shown in figure 6, and placed substantially horizontally, wherein a first side 41 can be connected to a waste of a floor drain, washbasin, bath, shower tray, sink, toilet and the like. At a second side 51 the assembly of waste pipes 42, 52 can subsequently be connected to the sewer system. In use liquids, such as water, will flow via the waste to the waste pipe 42, passing beneath the first partial closure 44. The liquid will be stopped by the second partial closure 54, and the waste pipe will be filled until the water level reaches the upper edge 58 of the second partial closure 54. The lower edge 48 of the first partial closure 44 then is below the water level, thus forming a water seal. When liquid further to be drained off flows into the waste pipe, the liquid will flow over the upper edge 58 of the second partial closure 54 to the sewer system.
In figure 7 three substantially straight cylindrical waste pipes 62, 72, 82 are coupled to each other, wherein the middle waste pipe 72 is placed rotated at an angle of substantially 180 degrees with respect to the first 62 and third 82 waste pipe. In that way a reservoir is formed between the partial closures 64, 84 of the first 62 and third 82 waste pipe, in which reservoir liquids may be collected, at least when in the lying position of the assembly. The partial closure 74 of the middle waste pipe 72 extends into said reservoir, so that a water seal can be formed in case of a sufficient level of liquid in the reservoir.
A further example describes an embodiment of a drain device according to the invention, wherein the drain device 91 comprises two waste pipes 92, 93 that are placed adjacent to each other in a lying position and partially engage into each other. In the overlapping part 94, a liquid to be drained off is guided from the first waste pipe 92 to the second waste pipe 93. The passage from the first 92 to the second waste pipe 93 comprises a first partial closure 95, beneath which the liquid to be drained off can flow, and comprises a second partial closure 96. The liquid to be drained off will be stopped by the second partial closure 96,
and the waste pipe 92 will be filled until the water level reaches the upper edge of the second partial closure 96. The lower edge of the first partial closure 95 is then below the water level, thus forming a water seal, as shown in figures 9A, 9B and 9C. When liquid further to be drained off flows into the waste pipe 92, the liquid will flow over the upper edge of the second partial closure 96 to the sewer system. In this embodiment the first 95 and second 96 partial closures are, at least partially, placed in longitudinal direction of the waste pipes 92, 93. By adjusting the length of the overlapping part 94, the length of the passage opening, and thus the discharging capacity, can be selected larger or smaller, whatever is desired.
A further exemplary embodiment of a drain device 101 , also comprises two waste pipes 102, 103 that are placed adjacent to each other in a lying position, and which are placed spaced apart. In a substantially longitudinal direction of the waste pipes 102, 103 a passage 104 is placed which connects the lower part 105 of the first waste pipe 102 with an upper part 106 of the second waste pipe 103. The passage 104 comprises a first partial closure 107, beneath which the liquid to be drained off can flow, and comprises a second partial closure 108. The liquid to be drained off will be stopped by the second partial closure 108, and the waste pipe 102 will be filled until the water level reaches the upper edge of the second partial closure 108. The lower edge of the first partial closure 107 is then below the water level, thus forming a water seal. When liquid further to be drained off flows into the waste pipe 102, the liquid will flow over the upper edge of the second partial closure 108 to the sewer system. The passage 104 extends over the full length of the overlapping part 109. In that way the length of the passage, and thus the discharging capacity, can be selected larger or smaller, whatever is desired.
As stated above, the waste pipe including stench trap can be used connected with a waste of a floor drain, washbasin, bath, shower tray, sink, toilet and the like in order to thus form a stench trap or water seal.
Figure 1 1 shows an example to be used in a washbasin 1 10, wherein the wash basin 1 10 is provided with a waste 1 11 , for instance in the
form of a hole or slit, at a front side in the washbasin 1 10. Connected to the waste 1 11 , a waste pipe including stench trap 112 is placed under the washbasin 1 10, which is subsequently connected to the sewer system 1 13. Due to the lying position of the waste pipe including stench trap 1 12 according to the invention, the waste pipe, and particularly the stench trap or siphon, need not protrude from under the washbasin 1 10 and the whole of waste pipe and stench trap can be hidden from view.
Figure 12 shows an example to be used in a shower tray 120. Also the shower tray 120 is provided with a waste 121 , for instance in the form of a waste water tray or drainage channel. Connected to the waste 121 , a waste pipe including stench trap 122 is placed, which is subsequently connected to the sewer system 123. Due to the lying and flat construction of the waste pipe including stench trap 122 according to the invention, the height of the shower construction can remain within limits, particularly so that it can be placed in a finishing floor of a shower area.
Figure 13 shows a further example to be used in a washbasin 130, wherein the washbasin 130 is provided with a waste 131 at a rear side. Connected to the waste 131 is a first waste pipe 132 having a first partial closure for closing off an upper part of the waste pipe 132, a bend 133, and a second waste pipe 134 having a second partial closure for closing off a lower part of the waste pipe 133. In the lying position of the waste pipes 132, 134 and bend 133, the liquid to be drained off will flow beneath the first partial closure, and the liquid to be drained off will be stopped by the second partial closure. The first waste pipe 132, the bend 133 and a part of the second waste pipe 134 will be filled until the water level reaches the upper edge of the second partial closure. The lower edge of the first partial closure is then below the water level, thus forming a water seal. When liquid further to be drained off flows into the waste 131 , the liquid will flow over the upper edge of the second partial closure to the sewer system 135.
Figure 14 shows a schematic view of an exemplary embodiment of a drain device 140 according to the invention. Said drain device 140 comprises a drainage channel 141 having a bottom wall 142 and two
longitudinal side walls 143, 144 that are upright from the bottom wall 142. In one of said longitudinal side walls 144 there is a waste 145 having a connecting sleeve 146 that extends beyond the drainage channel 141.
A covering cap 147 is placed in the drain 141 near the waste 145, particularly between the longitudinal side walls 143, 144, which cap at least closes off the upper side of the waste 145. The covering cap 147 comprises a wall 148 which is placed spaced apart from the waste 145 and which is provided with an edge 149 that faces the bottom wall 142 and is placed spaced apart from the bottom wall 142 to provide a flow-through opening between the edge 149 and the bottom wall 142.
The drainage channel 141 is furthermore provided with a covering member 150 in the form of a rod which by means of supporting members 151 is retained near the upper side of the drainage channel 141.
Connecting to the waste 145 a waste pipe 31 is connected to the connecting sleeve 146, which waste pipe 31 has already been described above with reference to figures 4A, 4B, 5A and 5B. The cap 147 in the drainage channel 141 forms a first part of the stench trap, and the waste pipe 31 with partial closure 34 closing off a lower part of the waste pipe 31 , forms a second part of the stench trap.
The above description is included to illustrate the operation of preferred embodiments of the invention and not to limit the scope of the invention. Starting from the above explanation many variations that fall within the spirit and scope of the present invention will be evident to an expert.
(octrooi/185335/PCTP185335A des BP/NG 6099I