EP1674628A1 - Drainage device. - Google Patents

Abstract

Drainage installation for placing on ground plate (1) has opening (16) for waste water has an odor sealing unit (2) through which the waste water can enter. The installation can be fluidically connected to a drainage pipe (11), so that the water from the odor sealing unit can enter the drainage pipe. The drainage installation has a plate (6) which can be put on the underside of the ground plate.

Description

The present invention relates to a drainage device for the arrangement on a bottom plate with an opening for wastewater according to the preamble of claim 1. Furthermore, the present invention relates to an arrangement of a drainage device to a bottom plate according to the preamble of claim 22.

It is known drainage devices to floor plates, which may consist of a natural stone for a shower, for example. In the arrangements known from the prior art, a considerable effort is made to set the drainage device on an example designed as a natural stone floor plate. For example, parts of the drainage device can be glued into the interior of the opening of the natural stone slab for this purpose. A disadvantage of such arrangements proves, on the one hand, that they are very complex to implement and, secondly, that the connection between the natural stone plate or base plate and drain device is comparatively less solid.

A further problem with arrangements known from the prior art is the fact that, for example, a natural stone floor slab must be treated in such a way that shower water falling on the natural stone runs to the opening in the stone. Depending on the size and thickness of the natural stone, it is desirable to remove it in the region of the opening to a small thickness of, in particular, less than 1 cm, for example by milling. As a result, a natural stone may become too unstable.

The problem underlying the present invention is the provision of a drainage device and an arrangement of the type mentioned, which are simple in construction and safe Allow connection between the drainage device and the bottom plate.

This is inventively achieved with respect to the drain device by a drain device of the type mentioned above with the characterizing features of claim 1 and with respect to the arrangement by an arrangement of the type mentioned above with the characterizing features of claim 22. The subclaims relate to preferred developments of the invention.

According to claim 1 it is provided that the drainage device further comprises a plate which is attachable to the underside of the bottom plate. It is thereby possible to attach parts of the drainage device to the plate, which in turn can be attached or attached to the underside of the bottom plate.

There is the possibility that the drainage device further comprises a first fastening part provided with fastening means and a second fastening part provided with fastening means, wherein by attaching the first fastening part to the second fastening part the drainage device can be attached to the floor plate. The attachment of the drainage device to the bottom plate can thus be realized by simply connecting two parts enclosed by the drainage device.

In this case, it can preferably be provided that the fastening means are formed on the first fastening part as an external thread and the fastening means on the second fastening part as an internal thread. By simply screwing together internal thread and external thread can thus be carried out attachment of the drainage device to the bottom plate.

Alternatively, it may be provided that the fastening means are formed on the first fastening part and on the second fastening part as a bayonet closure means. By means of such a bayonet closure attachment of the drainage device to the bottom plate is also realized by simple means.

There is the possibility that the first and / or the second fastening part are substantially tubular, wherein, in particular, the first fastening part is received coaxially by the second fastening part. Due to the tubular design of the fasteners they can be easily integrated into the drainage device, for example, because the wastewater can flow through these tubular parts. The coaxial reception of the first fastening part in the second fastening part can enable a simple screwing in of the first fastening part into the second fastening part via the aforementioned outer and inner threads.

It can be provided that the plate is designed as a metal plate, in particular as a sheet. It is possible that the plate comprises at least one bead or a depression, which serve to reinforce the plate. Furthermore, the plate can be attached to the underside of the bottom plate by means of adhesive. There is the possibility that the first and the second fastening part allow attachment of parts of the drainage device to the plate, which in turn is attached or attached to the underside of the bottom plate. In particular, the attachment of the plate to the bottom plate by means of adhesive can be easily implemented at the installation of the drain device. Furthermore, the plate before the eroding processing, for example, as a natural stone trained bottom plate to be glued to this. The plate designed in particular as a plate and preferably provided with at least one bead or recess can in this case stabilize the natural stone such that in the region of the opening the natural stone can be milled to a small thickness of, for example, less than 1 cm.

Preferably, the second fastening part may have on its outer side sealing means, which are in particular formed as a lip seal. These sealing means allow a sealing introduction of the second fastening part in the drain device.

There is the possibility that the drainage device comprises a drain pot, into which the waste water which has passed through the odor trap unit can enter, wherein the drain pot can be fluidly connected to a drainage pipe.

There is also the possibility that the drain pot forms the second fastening part. It can be provided that the drain pot has an internal thread. It can therefore be dispensed with the separate second fastening part, because in the internal thread of the drain pot, the external thread of the first fastening part can be screwed. This variant thus represents a simplified, less expensive embodiment.

There is also the possibility that the drainage device comprises a pipe section with a flange projecting outwardly from the top, wherein the pipe section is introduced from above into the drainage pot or can be introduced. Furthermore, for example, could be applied to the top of the flange, a flow, wherein the flow may rest against the underside of the example formed as a sheet plate.

There is also the possibility that the pipe section forms the second fastening part, it being possible to provide that the pipe section has an internal thread. Also in this variant can be dispensed with a separate second fastening part.

There is the possibility that the second fastening means, in particular sealingly by means of the outer sealing means, is introduced or can be introduced into a drain pipe or into the drain pot or into the pipe piece with flange. For example, the second fastening part could be introduced with its externally mounted lip seal in such a way in the drain pipe, the drain pot or pipe with flange, that on the one hand, a tight connection between the second fastening part and drain pipe, drain pot or piece of pipe is achieved and the other by this second mounting part or by the lip seal arranged on the outside thereof, a comparatively fixed attachment of the second fastening part to the drainage pipe or the drainage pot or the pipe piece with flange takes place.

According to a preferred embodiment of the present invention, the first attachment part has a portion, in particular an upper peripheral flange, which rests or can rest on the plate attachable to the underside of the bottom plate. If at the same time the second fastening part is inserted with the lip seal, for example, in the pipe section with flange and seated comparatively firmly, the drainage device can be attached to the glued to the underside of the bottom plate, for example, designed as a sheet plate by screwing the first fastening part in the second fastening part. The plate thus becomes between the upper circumferential flange of the first attachment part and the tube piece with flange, which in turn is connected to the second fastening part, clamped. In this way, results in a simple connection between the bottom plate and the drainage device.

There is also the possibility that the first fastening part has a support for a part of the odor trap unit. The odor closure unit can thus be hung after attachment of the first and second fastening part to the bottom plate simply from above into the first fastening part.

For this purpose, the odor sealing unit can be received by the first fastening part and / or the second fastening part, in particular coaxially.

There is also the possibility that the drainage device comprises a grate, which can optically close the opening in the bottom plate.

For this purpose, the discharge device may comprise at least one frame which can be introduced into the opening of the bottom plate and on which the grate can rest. This frame could for example rest with its underside on the plate, for example, as a sheet metal. By the frame is thus provided by simple means a support for the rust in the opening of the bottom plate. It is quite possible to use a plurality of superimposed frame in thick floor panels.

Preferably, the drain device comprises sealing means formed such that by attaching the first attachment part to the second attachment part, the drainage device is sealed to the Floor plate can be connected. The attachment of the first attachment part to the second attachment part can thus not only cause the attachment of the drainage device to the bottom plate, but at the same time the sealing of the drainage device with respect to the bottom plate, so that through the opening of the bottom plate through water flowing only in the drainage device and from this enters the drainpipe.

The inventive arrangement according to claim 22 is characterized by a drain device according to the invention.

There is in particular the possibility that the bottom plate is designed as a natural stone, molding or tile or the like. The drainage device can thus be integrated into a visually appealing, for example made of natural stone floor. Alternatively, the drainage device can also be integrated into a molded part, which can serve as a support for a shower tray or the like.

There is also the possibility that the bottom plate in the opening has a paragraph on which the rust can rest. In this case, the frames described above can usually be dispensed with. Rather, the rust can be held directly from the bottom plate.

Fig. 1

eine Explosionsdarstellung einer ersten Ausführungsform einer erfindungsgemäßen Anordnung mit einer ersten Ausführungsform einer erfindungsgemäßen Ablaufvorrichtung;

Fig. 2

einen Vertikalschnitt durch die Anordnung beziehungsweise die Ablaufvorrichtung gemäß Fig. 1;

Fig. 3

eine Detailansicht gemäß dem Pfeil lll in Fig. 2;

Fig. 4

eine Explosionsansicht einer zweiten Ausführungsform einer erfindungsgemäßen Anordnung mit einer zweiten Ausführungsform einer erfindungsgemäßen Ablaufvorrichtung;

Fig. 5

einen Vertikalschnitt durch die Anordnung beziehungsweise die Ablaufvorrichtung gemäß Fig. 4;

Fig. 6

eine Detailansicht gemäß dem Pfeil VI in Fig. 5;

Fig 7a

eine perspektivische Ansicht einer weiteren Ausführungsform einer Platte einer erfindungsgemäßen Ablaufvorrichtung;

Fig. 7b

eine Seitenansicht der Platte gemäß Fig. 7a;

Fig. 8a

eine perspektivische Ansicht einer weiteren Ausführungsform einer Platte einer erfindungsgemäßen Ablaufvorrichtung;

Fig. 8b

eine Seitenansicht der Platte gemäß Fig. 8a;

Fig. 9a

eine perspektivische Ansicht einer weiteren Ausführungsform einer Platte einer erfindungsgemäßen Ablaufvorrichtung:

Fig. 9b

eine Seitenansicht der Platte gemäß Fig. 9a;

Fig. 10a

eine perspektivische Ansicht einer weiteren Ausführungsform einer Platte einer erfindungsgemäßen Ablaufvorrichtung;

Fig. 10b

eine Seitenansicht der Platte gemäß Fig. 10a;

Further features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Show in it

Fig. 1

an exploded view of a first embodiment of an inventive arrangement with a first embodiment of a drain device according to the invention;

Fig. 2

a vertical section through the arrangement or the drain device according to FIG. 1;

Fig. 3

a detailed view according to the arrow III in Fig. 2;

Fig. 4

an exploded view of a second embodiment of an inventive arrangement with a second embodiment of a drain device according to the invention;

Fig. 5

a vertical section through the arrangement or the drain device of FIG. 4;

Fig. 6

a detailed view according to the arrow VI in Fig. 5;

Fig. 7a

a perspective view of another embodiment of a plate of a drain device according to the invention;

Fig. 7b

a side view of the plate of FIG. 7a;

Fig. 8a

a perspective view of another embodiment of a plate of a drain device according to the invention;

Fig. 8b

a side view of the plate of FIG. 8a;

Fig. 9a

a perspective view of another embodiment of a plate of a drain device according to the invention:

Fig. 9b

a side view of the plate of FIG. 9a;

Fig. 10a

a perspective view of another embodiment of a plate of a drain device according to the invention;

Fig. 10b

a side view of the plate of FIG. 10a;

The apparent from Fig. 1 embodiment of an inventive arrangement comprises a bottom plate 1 and a drain device. The drainage device essentially comprises an odor closure unit 2 with an inner part 3 and an outer part 4, a first fastening part 5, a sheet 6 designed as a sheet metal, a second fastening part 7, a pipe piece 8 with a flange 9 and a drain pot 10 Drain pot 10 is connected in the illustrated embodiment with a drain pipe 11.

In particular, the sectional view of FIG. 2 can be removed that the odor trap unit 2 is constructed in a conventional manner siphon similar. The inner part 3 extends in the form of a bottom open pipe socket in the outer part 4, the bottom is closed like a pot and has an overflow at the top.

It can also be seen from FIGS. 2 and 3 that the first fastening part 5 has an external thread 12 on its outside, whereas the second fastening part 7 has an internal thread 13 on its inside. In Fig. 2 and in Fig. 3 are the internal thread 13 and the external thread 12 in engagement with each other.

Furthermore, both FIG. 1 and FIG. 2 and FIG. 3 show that the second fastening part 7 has a lip seal 14 on its outside. The sealing material forming the lip seal 14, as can be seen in detail in FIG. 3, extends upwards on the outside of the second fastening part 7, so that the upper edge of the second fastening part 7 is likewise covered by a circumferential seal 15. As can also be seen from FIG. 3, in the assembled state of the drainage device, this upper peripheral seal 15 rests on the underside of the plate 6 designed as a sheet metal in a partial area.

The bottom plate 1 has in the illustrated embodiment an opening 16 with a substantially square outline. Instead of an opening 16 with a square outline, however, an opening with a circular outline or a differently shaped opening may well be chosen.

Furthermore, the plate 6 designed as a sheet metal has an opening 17 provided with a circular outline in the embodiment shown. This opening 17 may have other outlines. Furthermore, the opening 17 surrounding the edge the plate 6 bent slightly downwards. But there is also the possibility that the edge is flat.

As can be seen, for example, from FIGS. 1 and 3, the first fastening part 5 has an upper, radially outwardly extending flange 18 which, in the assembled state of the drainage device, rests on the slightly bent-down edge around the opening 17 of FIG Plate 6 rests. The edge is thus adapted in particular to the shape of the flange. In particular, from Fig. 3 it is seen that between the underside of the flange 18 of the first fastening part 5 and the top of the plate 6 in the region of the slightly downwardly bent edge, in particular designed as an O-ring seal 19 is provided, which is the first fastening part seals against the plate 6. By the seal 19 and the circumferential seal 15 thus the plate 6 is sealed from above or from below against the first fastening part 5 and the second fastening part 7.

The plate 6 may be attached to the underside of the bottom plate 1. In particular, the plate 6 can be glued to the bottom of the bottom plate 1 during assembly of the drain device. Alternatively, the plate 6 can be pasted even before an abrasive machining of the bottom plate to achieve a slope under them to stabilize them.

On the upper side of the flange 9 of the pipe section 8, a flow can be placed, which rests in the assembled state of the drain device on the underside of the plate 6 and in this way additionally contributes to the seal.

Between the pipe section 8 with flange 9 and the drain pot 10, a further disc-shaped, in particular from FIG Seal 20 may be arranged. Here, in the illustrated embodiment, the drain pot 10 has an upper radially outwardly extending flange 21, on which the disc-shaped seal 20 can rest. In particular, the disc-shaped seal 20 can be screwed to the flange 21 of the drain pot (see Fig. 2). In Fig. 2 is further a part of the bottom, namely a screed layer 22 shown, in which the drainage device is at least partially introduced. In particular, in this case seals the disc-shaped seal 20 from the lower part of the drainage device from the underside of the screed layer.

In Fig. 2, the drain pot 10 and the drain pipe 11 are shown in dashed lines. This dashed representation of the drain pot is intended to illustrate that instead of the drain pot 10 also directly a drain pipe can be used, in which, for example, the second fastening part 7 is inserted with its outer lip seal 14.

In the illustrated embodiment, first, the drain pot 10 is installed and connected to one or more drain pipes 11 for mounting the drain device according to the invention or to achieve the inventive arrangement. Subsequently, in the opening of the pipe socket 8 is introduced, which extends through the opening through into the region of the seal 20, or to the upper edge of the drain pot 10. Subsequently, up to the bottom of the flange 9 of the pipe section 8 is a screed layer 22 applied to the floor.

After drying the screed layer 22, the second fastening part 7 is introduced into the pipe section 8. Due to the lip seal 14 results in a comparatively firm and secure connection between the second fastening part 7 and pipe section. 8

Subsequently, the plate 6 is glued to the underside of the bottom plate 1, so that the two openings 16, 17 correspond to each other. Alternatively, the plate 5 may have already been glued to the underside of the bottom plate 1 prior to assembly, in particular in order to stabilize it. Subsequently, the bottom plate 1 is applied to the screed layer 22 in the region of the flange 9, that the openings 16, 17 correspond to the corresponding opening in the screed layer, or with the pipe section 8 or aligned.

Subsequently, the first fastening part 5 is inserted through the opening 16 in the bottom plate 1 into the second fastening part 7 and screwed into this. By screwing the fastening parts 5 and 7 together, the upper flange 18 of the first fastening part 5 is pressed from above against the plate 6, whereas the upper, provided with the peripheral seal 15 edge of the second fastening part 7 is pressed from below against the plate 6. In this way, a secure and tight connection between the plate 6 and the fastening part 5, 7.

Subsequently, the odor-sealing unit 2 is also inserted from above into the first fastening part 5 through the opening 16. As can be seen in particular from FIG. 3, the first fastening part 5 has an inner support 23 for the odor-sealing unit 2 arranged in its upper region. For this purpose, the outer part 4 of the odor closure unit 2 is provided with a radially outwardly extending edge 24 which can rest on the support 23, on this edge 24 of the outer part 4 is also an outwardly extending edge 25 of the inner part 3 on. As 3, a groove is provided in the upper edge 25 of the inner part 3 of the odor-sealing unit 2, in which an O-ring 26 is arranged, which seals the odor-sealing unit 2 against the inner edge of the first fastening part 5.

After insertion of the odor sealing unit 2, in the embodiment shown in FIGS. 1 to 3, three frames 27 are inserted into the opening 16 of the bottom plate 1, which likewise have a square outline and fit comparatively precisely into the opening 16. On this frame 27, a grate 28 can be placed. It is inventively possible to use more or less frame 27. For example, a high frame 27 could be used, which has the same height as the stacked frame 27th

In the embodiment according to FIGS. 4 to 6, identical parts are provided with the same reference numerals as in the exemplary embodiment according to FIGS. 1 to 3. The essential difference between these embodiments is that the exemplary embodiment according to FIGS. 4 to. 6 dispensed with the separate second fastening part 7. Rather, the drain pot 29, which can be seen for example from FIG. 4, forms the second fastening part in this embodiment. For this purpose, the drain pot 29 has an internal thread 30 into which the external thread 12 of the first fastening part 5 can be screwed. The embodiment depicted in FIGS. 4 to 6 thus represents a simplified embodiment in which some parts can be dispensed with. The drain device according to this embodiment further comprises an annular seal 31, which is placed on the top of the drain pot 29 and in the assembled state of the Drain device the drain pot 29 seals against the underside of the plate 6 (see Fig. 6).

Further different from the first embodiment is in the second embodiment that the plate 6 in the region around its opening 17 has no slightly downwardly extending edge. Rather, the edge lies around the opening 17 in the plane of the plate 6, so that the upper flange 18 of the first fastening part 5 is shaped slightly differently than in the first embodiment. In particular, in the second embodiment according to FIGS. 4 to 6, the flange 18 is formed essentially at right angles to the vertical extent of the first fastening part 5 (see, for example, FIG. 6).

Another difference is the fact that in the embodiment according to FIGS. 4 to 6, the bottom plate in the opening 16 has a shoulder 32 on which the grate 28 can rest. In this embodiment, the inserted frame 27 is thus dispensed with. Of course, it is quite possible according to the invention to use such a design with a shoulder in the opening 16 of the base plate 1, even in the first embodiment with a separate second fastening part 7. Furthermore, there is of course also the possibility of a substantially rectangular upper flange 18 of the first fastening part, as it is provided in the embodiment of FIG. 4 to FIG. 6, also in the first embodiment according to FIG. 1 to FIG. second attachment part 7 to use.

In the embodiment of a plate 33 with a rectangular outline which can be seen from FIGS. 7a and 7b, radially arranged beads 34 are provided provided, which serve to reinforce the plate 33. The beads 34 are formed as very shallow depressions in the plate 33.

FIGS. 8a and 8b show a plate 35 which has somewhat longer but also radially arranged beads 36.

FIGS. 9a and 9b show a plate 37 with a circular outline. In this, a comparatively wide, circumferential, fulfilling the function of a bead recess 38 is disposed in the plate 37, which also serves for reinforcement. The recess 38 extends in the radial direction over more than half, preferably over about two-thirds of the radial dimension of the plate 37th

From Fig. 10a and Fig. 10b is also a plate 39 can be seen with a circular outline. In the case of this plate 39, as in the embodiments according to FIGS. 7a, 7b, 8a and 8b, radially arranged beads 40 are provided.

LIST OF REFERENCE NUMBERS

1

baseplate

2

Trap unit

3

inner part of 2

4

outer part of 2

5

first fastening part

6, 33, 35, 37, 39

plate

6

second fastening part

7

pipe section

8th

Flange to 8

10, 29

drain pot

11

drain pipe

12

External thread at 5

13

Internal thread at 7

14

Lip seal on 7

15

circumferential seal

16

Opening in 1

17

Opening in 6

18

upper flange on 5

19

Seal between 6 and 18

20

disc-shaped seal

21

upper flange at 10

22

screed

23

Edition for 2 to 5

24

Edge at 4

25

Edge to 3

26

O-ring

27

frame

28

rust

30

Internal thread at 29

31

annular seal

32

Paragraph in 16

34, 36, 40

Beading

38

deepening

Claims (25)

, Drainage device for the arrangement on a bottom plate (1) with an opening (16) for waste water, comprising an odor trap unit (2) through which waste water can pass, wherein the drainage device is fluidically connected to a drain pipe (11), so that through the Odor closure unit (2) passed through wastewater into the drain pipe (11), characterized in that the drainage device further comprises a plate (6, 33, 35, 37, 39) which is attachable to the underside of the bottom plate (1). Drainage device according to claim 1, characterized in that the drainage device further comprises a fixing means provided with first fastening part (5) and provided with fastening means second fastening part (7), wherein by attaching the first fastening part (5) on the second fastening part (7) Drainage device to the bottom plate (1) can be attached. Drainage device according to claim 2, characterized in that the fastening means on the first fastening part (5) as external thread (12) and the fastening means on the second fastening part (7) as internal thread (13, 30) are formed. Drainage device according to claim 2, characterized in that the fastening means are formed on the first fastening part (5) and on the second fastening part (7) as a bayonet closure means. Drainage device according to one of claims 1 to 4, characterized in that the first and / or the second fastening part (5, 7) are substantially tubular, wherein in particular the first fastening part (5) of the second fastening part (7) is accommodated coaxially , Drainage device according to one of claims 1 to 5, characterized in that the plate (6, 33, 35, 37, 39) is designed as a metal plate, in particular as a sheet metal. Drainage device according to one of claims 1 to 6, characterized in that the plate (33, 35, 37, 39) comprises at least one bead (34, 36, 40) or a recess (38) for reinforcing the plate (33, 35, 37, 39). Drainage device according to one of claims 1 to 7, characterized in that the plate (6, 33, 35, 37, 39) on the underside of the bottom plate (1) can be attached by means of adhesive. Drainage device according to one of claims 2 to 8, characterized in that the second fastening part (7) has on its outer side sealing means which are in particular formed as a lip seal (14). Drainage device according to one of claims 1 to 9, characterized in that the drainage device comprises a drain pot (10, 29) into which the waste water through the odor trap unit (2) can enter, wherein the drain pot (10, 29) fluidly with a drain pipe (11) is connectable. Drainage device according to claim 10, characterized in that the drain pot (29) forms the second fastening part. Drainage device according to claim 11, characterized in that the drain pot (29) has an internal thread (30). Drainage device according to claim 12, characterized in that the drainage device comprises a pipe section (8) with an outwardly projecting flange (9) arranged on the upper side thereof, wherein the pipe section (8) is introduced from above into the drainage pot (10) or can be introduced. Drainage device according to claim 13, characterized in that the pipe section (8) forms the second fastening part. Drainage device according to claim 14, characterized in that the pipe piece (8) has an internal thread (30). Drainage device according to one of claims 9, 10 or 13, characterized in that the second fastening part (7) sealingly, in particular by means of the outer sealing means in a drain pipe (11) or in the drain pot (10) or in the pipe section (8) Flange (9) is introduced or can be introduced. Drainage device according to one of claims 2 to 16, characterized in that the first fastening part (5) has a portion, in particular an upper circumferential flange (18), which on the underside of the bottom plate (1) attachable plate (33 33 , 35, 37, 39) rests or can rest. Drainage device according to one of claims 2 to 17, characterized in that the first fastening part (5) has a support (23) for a part of the odor trap unit (2). Drainage device according to one of claims 2 to 18, characterized in that the odor-trap unit (2) is received by the first fastening part (5) and / or the second fastening part (7), in particular coaxially. Drainage device according to one of claims 1 to 19, characterized gokennzeichnet that the drainage device comprises a grate (28) which can optically close the opening (16) in the bottom plate (1). Drainage device according to claim 20, characterized in that the drainage device has at least one frame (27) which in the opening (16) of the bottom plate (1) can be introduced and on which the grate (28) can rest. Drainage device according to one of claims 2 to 21, characterized in that the drainage device comprises sealing means which are designed such that by attaching the first fastening part (5) on the second fastening part (7) the drainage device are sealed to the bottom plate (1) may. Arrangement of a flow apparatus at a base plate (1), a bottom plate (1) can pass therethrough comprising an opening (16) through the waste water, characterized by a drainage device according to one of claims 1 to 22nd Arrangement according to claim 23, characterized in that the bottom plate (1) is designed as a natural stone, molded part or tile or the like. Arrangement according to one of claims 23 or 24, characterized in that the bottom plate (1) in the opening (16) a shoulder (32) on which the grate (28) can rest.

Images