EP4036330A2 - Sanitary drainage device with filter basket - Google Patents

Abstract

The present invention relates to a drain fitting for a pool, tub or the like, the drain fitting comprising the following: a tubular container (2, 6) with a central longitudinal axis, the upper axial end of which is designed for attachment to a pool or tub floor and the lower axial end of which has an outlet (22); a cymbal closure cap (42) with a supporting adapter having an outer ring (36) fitting within the container (2, 6) and a central hub (38) interconnected by spokes (40) and having a an elongate connector (44) for connecting the closure cap (42) to the hub (38) of the adapter; and a filter basket (20, 20', 20") which can be inserted into or removed from the container (2, 6) from above; the connecting element (44) for connecting the closure cap (42) to the hub (38) contains a spring and latching mechanism with which it forms a push-up drain valve together with the adapter and the closure cap (42).

Description

The invention relates to a drain fitting for a pool, a tub or the like, which has the following: a tubular container with a central longitudinal axis, the upper, upstream axial end of which is designed for attachment to a pool or tub floor and the lower, downstream axial end having an outlet; a cymbal cap with a supporting adapter having an outer ring fitting into the container and a central hub interconnected by spokes; an elongate connector for connecting the closure cap to the hub of the adapter; and a filter basket insertable into and removable from the top of the container; according to the preamble of claim 1. The basin or the tub can be designed as a sink, washbasin or the like.

A drain fitting with the features of the preamble of claim 1 is from US2008/168596 A1 known.

The invention is based on the object of improving the known drain fitting in such a way that it is both easier to open and close and also offers effective protection against unpleasant odors in modern kitchens where there is only very little installation height under the sink.

This object is achieved by a drain fitting with the features of claim 1, in which the connecting element for connecting the closure cap to the hub contains a spring and latching mechanism with which it forms a push-up drain valve together with the adapter and the closure cap.

Advantageous developments of the invention are specified in the dependent claims.

Sanitary push-up drain valves, more rarely also pop-up valves, are known per se and contain a spring and latching mechanism that allows the closure cap to be closed and closed by simply pressing the closure cap from above and again to open. A push-up drain valve has a number of advantages over caps that simply consist of a rubber stopper or those with a lever and rod for opening and closing from the outside. Because the spring and detent mechanism must be supported within the drain, push-up drain valves are typically offered as a pre-assembled kit that replaces the entire existing drain line from sink to siphon. A waste fitting of this type then has an effective overall installation height that is not compatible with the requirements of many modern kitchens. In addition, the acquisition costs and the installation effort of commercially available push-up drain valves are not inconsiderable.

According to the invention, the spring and locking mechanism is integrated into the connecting element for connecting the closure cap to the hub, which saves a lot of space and thus enables a relatively low installation height, because the connecting element can take up an otherwise rather unused space in the center of the filter basket.

As used herein, terms such as "top", "bottom" and "height" refer to the orientation of the drain fitting when installed, and the terms "upstream" and "downstream" refer to the direction of flow of water through the drain fitting.

As used herein, the term "tubular" refers primarily to generally rotationally symmetrical, and particularly cylindrical, shapes, although those skilled in the art will recognize that at least some of the components may also have cross-sections other than circular, e.g. B. elliptical or polygonal, and that at least some of the components can also have non-rotationally symmetrical cross-sections.

In preferred embodiments, the connecting element for connecting the closure cap to the hub includes a tubular housing which extends in the direction of the longitudinal axis and is designed to be connected to the hub. In addition, the connecting element includes a central connecting pin extending in the direction of the longitudinal axis, movable along the longitudinal axis in the connecting pin is mounted and has an end protruding from the connecting pin for connection to the closure cap, the tubular housing also accommodating the spring and detent mechanism acting between the tubular housing and the connecting pin.

In preferred embodiments, the drain fitting contains a bell-shaped odor trap which is accommodated in the container and opens into the outlet and which preferably consists of two tubular sleeves, namely an inner sleeve which fits into the outlet and on the circumference of which several wings distributed over the circumference extend both radially outwards and extending upwardly beyond an upper end of the tubular portion of the inner sleeve away from the outlet, and a cup-shaped outer sleeve fittable over the inner sleeve including the wings thereof.

A bell odor trap, as it is used e.g. B. from the DE 10 2011 053 345 B4 or the DE 20 2011 050 359 U1 is known, serves as a gas and odor barrier against sewer gases from a sewage pipeline. The amount of water remaining in the bell-type odor trap (so-called sealing water) prevents gases or odors from the sewage system and the sewage pipe from rising. Such a bell-type odor trap requires a much lower installation height than a tubular siphon as is commonly used.

In preferred embodiments, the drain fitting contains a device separate from the filter basket for receiving and holding a lumpy water-soluble substance which is an antiseptic, a germicide, an antibacterial and/or fungicidal substance, a deodorant, a fragrance, a perfume, a cleaning agent or a is or contains another water-soluble substance or a mixture of the aforementioned substances.

With a drain fitting, as from the above US2008/168596 A1 is known, the lumpy water-soluble substance consists of many pellets that contain a deodorant and - at least when new - are much larger than the holes in the filter basket, so that they can be received and retained in the filter basket itself until they have used up. Because the filter basket contains both the pellets and dirt from the rinsing water, and the pellets get smaller over time, a less and less water-permeable mush of both forms in it over time. So that the filter basket can still let enough water through, it has to be quite long or high. Together with the length of the tube siphon that is also provided, with a tube bent in an S-shape, the result is an installation height that makes the known drain fitting unsuitable for modern kitchens. And if you have to clean the filter basket before the pellets are used up, you have practically no choice but to dispose of the pellets that have not yet been used.

The aforementioned embodiment of the invention enables a spatial separation of the filter basket and the water-soluble substance, which requires much less of the substance. The few odors that can still develop in or escape from the bell trap can be neutralized with very little of the water-soluble substance.

Therefore, e.g. B. a single cleaning stone or aroma stone, which can also be arranged downstream of the filter and upstream of the bell-type odor trap in a relatively short drain fitting. And if you remove the filter basket, which can also be relatively short or flat in the invention, for cleaning, you can see from there whether the piece of water-soluble substance is still large enough or whether it needs to be replaced.

In preferred embodiments, the device for receiving and holding a lumpy water-soluble substance contains or is designed as an upwardly open tray for it. The tray may be adapted to the form of a tablet, in which the lumpy water-soluble substance is preferably present.

In preferred embodiments, the means for receiving and retaining a chunky water-soluble substance is a generally dish-shaped insert loosely fitting within the container and having a generally cup-shaped substance-receiving portion formed in the center with a foraminous bottom.

Alternatively, the means for receiving and retaining a lumpy water soluble substance could be formed integrally with the outer sleeve of the bell trap, e.g. B. in that the top of the outer sleeve of the bell odor trap is generally flat, but is provided at its periphery with upwardly projecting crenellated projections spaced less than a diameter or smallest dimension of a piece of water-soluble substance.

In preferred embodiments, the tubular container consists of two parts, namely an upper container part in the form of a short length of pipe with a radially extending flange at one end and a lower container part in the form of a longer tubular structure with a radially extending flange at one end, the upper Container part and the lower container part are adapted to be screwed together coaxially. This is done in such a way that the two flanges press from above and below against the edge of a hole in the bottom of a basin on which the drain fitting is mounted.

The adapter that supports the pelvis closure cap is preferably designed to be inserted into the upper part of the container from above and fixed in this state.

In preferred embodiments, the upper container part and the lower container part can be screwed together by means of a multi-start coarse thread, the thread turns of which are narrow in relation to the pipe diameter. Threads of this type, also known as "quick screw connections", can be screwed on with fewer turns or in a shorter time. The necessary self-locking is achieved here by comparatively narrow threads. Alternatively, however, conventional flat threads can also be used for this purpose.

Preferably, the filter basket is removable and replaceable while the drain fitting is mounted on a basin or tub, and is preferably in the form of a cylindrical pot having a closed bottom and a filter or screen as a peripheral wall.

In embodiments where no means for receiving and retaining a lumpy water soluble substance and/or no bell trap is provided, the filter basket can be made correspondingly longer so that it can hold more debris. You can use a conventional siphon such. B. use a tube siphon.

In order to meet the requirements of many modern kitchens, the lower part of the container downstream of the filter basket can be provided with at least one inlet connection piece on its circumference, which protrudes radially outwards.

The inlet nozzle(s) make it possible to connect drain hoses from dishwashers, washing machines and the like to the side of the drain fitting, specifically at the level of the filter or the bell-type odor trap, instead of collecting several different drains only downstream of the drain fitting. This also contributes to reducing the required installation height. If or to the extent that the inlet nozzles are not required, they can be closed with screw caps.

Fig. 1

eine perspektivische Explosionsdarstellung einer Ablaufgarnitur eines ersten Ausführungsbeispiels in einem auseinandergebauten Zustand;

Fig. 2

eine Seitenansicht der Ablaufgarnitur von Fig. 1 in einem zusammengebauten Zustand;

Fig. 3

eine Längsschnittansicht der Ablaufgarnitur von Fig. 1 im zusammengebauten Zustand;

Fig. 4

eine Seitenansicht der Ablaufgarnitur von Fig. 1 im auseinandergebauten Zustand;

Fig. 5

eine Längsschnittansicht der Ablaufgarnitur von Fig. 1 im auseinandergebauten Zustand;

Fig. 6

eine perspektivische Explosionsdarstellung einer Ablaufgarnitur eines zweiten Ausführungsbeispiels in einem auseinandergebauten Zustand; und

Fig. 7

eine perspektivische Explosionsdarstellung einer Ablaufgarnitur eines dritten Ausführungsbeispiels in einem auseinandergebauten Zustand.

A description of exemplary embodiments follows with reference to the drawings. Show in it:

1

an exploded perspective view of a drain fitting of a first embodiment in a disassembled state;

2

a side view of the drain fitting from 1 in an assembled state;

3

a longitudinal sectional view of the drain fitting of 1 in assembled condition;

4

a side view of the drain fitting from 1 in disassembled condition;

figure 5

a longitudinal sectional view of the drain fitting of 1 in disassembled condition;

6

an exploded perspective view of a drain fitting of a second embodiment in a disassembled state; and

7

an exploded perspective view of a drain fitting of a third embodiment in a disassembled state.

The waste fitting shown comprises a tubular container which consists of two parts, namely an upper container part 2 in the form of a short piece of pipe with a radially extending flange 4 at one end and a lower container part 6 in the form of a longer tubular structure with a radially extending flange 8 at one end.

The upper container part 2 and the lower container part 6 are cylindrical in the exemplary embodiment and have approximately the same diameter, and they can be screwed together coaxially, ie along a central longitudinal axis which the various components of the drain fitting have in common, so that the two flanges 4, 8 from above or below against the edge of a hole in the bottom of a basin 10 on which the drain fitting is to be mounted, as in 3 illustrated. 3 shows a longitudinal sectional view along III-III in 3 , where the line III-III corresponds to the central longitudinal axis.

In the exemplary embodiment, the screwability of the upper container part 2 and the lower container part 6 is provided by a multi-start coarse thread, each with a plurality of threads 12, 14 on the container parts 2 and 6, as shown in FIG figures 1 , 4 and 5 recognizes.

Below the threads 14, the lower container part 6 has a shoulder 16 on which a flange 18 formed at one end of a filter basket 20 rests when the filter basket 20 is inserted into the lower container part 6, as shown in FIG 3 evident. The filter basket 20 is in the form of a cylindrical pot having a closed bottom and a filter or screen as a peripheral wall.

The lower container part 6 tapers at its lower axial end to form a discharge connection which forms an outlet 22 .

A tubular inner sleeve 24 fits snugly within the outlet 22 and has four circumferentially spaced vanes 26 formed thereon which extend both radially outward and beyond an upper end of the tubular portion of the inner sleeve 24 away from the outlet 22 extend above. A cup-shaped outer sleeve 28 fits snugly over inner sleeve 24, including wings 26 thereof. Inner sleeve 24 and outer sleeve 28 together form a bell-type odor trap.

Below the filter basket 20 and above the bell trap is a generally dish shaped insert 30 fitting loosely in the lower tank portion 6 and having a generally cup shaped portion 32 formed in the center thereof with a foraminous bottom. The cup-shaped section 32 is connected by four radial struts 34 to an outer ring which holds the insert 30 essentially centrally in the lower container part 6 . The insert 30 rests loosely on top of the outer sleeve 28 of the bell trap.

The cup-shaped portion 32 of the insert 30 is dimensioned so that one (not shown) tablet-shaped cleaning or fragrance stone of a type provided for the drain fitting can be placed from the top after removing the filter basket 20, which can be done while the drain fitting is mounted on a basin 10.

The insert 30 thus provides a means for receiving and holding a piece of water soluble substance and in particular an open top shelf therefor. The insert 30 can also be removed from the lower container part 6 after the filter basket 20 has been removed, as can the outer sleeve 28 of the bell-type odor trap.

At the top of the drain assembly is a basin cap 42 supported by two components.

One supporting component is an adapter consisting of an outer ring 36 which fits into the upper container part 2 and a central hub 38 which are connected to one another by two spokes 40 . The adapter can be inserted from above into the upper container part 2 and fixed there by turning, in that four projections distributed on the inner circumference in the upper container part 2 engage in corresponding recesses in the outer ring 36, as shown in FIG 1 evident.

The other supporting component is an elongate connector 44 which extends along the longitudinal axis and connects the closure cap 42 to the hub 38 of the adapter. The internal structure of the connecting element 44 is not shown in the figures. It contains a spring and latching mechanism with which it forms a push-up drain valve together with the adapter and the closure cap 42.

In particular, the connecting element 44 has a tubular housing which extends in the direction of the longitudinal axis and has an external thread at its upper end which is screwed into a corresponding internal thread in the hub 38 from below.

In addition, the connecting element 44 includes a central connecting pin which extends in the direction of the longitudinal axis, is mounted movably along the longitudinal axis within the connecting element 44 and has an end 46 protruding therefrom which has an external thread at its upper end which can be screwed into a corresponding one from below Internal thread in the center of the cap 42 is screwed.

Also arranged inside the connecting element 44 is the spring and latching mechanism (not shown), which allows the closure cap 42 to be closed and reopened in a manner known to those skilled in the art by simply pressing on the closure cap 42 from above.

An alternative to the push-up drain valve, not shown and not claimed here, would be a conventional "pull-up-push-down" drain valve that is opened by pulling on the cap 42 and closed by pushing on the cap 42. It could include a simple latching mechanism to latch a connector between the adapter and the cap 42 in two positions, with the cap 42 either closed or open.

The lower container part 6 is provided on its circumference with four inlet nozzles 46 which extend radially outwards and open into the lower container part 6 downstream of the filter basket 20 . The inlet sockets 46 make it possible to connect drain hoses from dishwashers, washing machines and the like to the drain fitting at the side. Inlet connections 46 that are not connected can be closed with screw caps (not shown).

in the in 6 shown second embodiment, the means for receiving and holding a lumpy water-soluble substance is not a separate part like the insert 30 in Figures 1 to 5 , but is formed in one piece with the outer sleeve 28 of the bell trap, in this embodiment in that the top of an outer sleeve 28' of the bell trap is generally flat but is provided on its periphery with upwardly protruding crenellated projections 29, the distances between which are less than one diameter or a smallest extension of a piece of water-soluble substance.

Since the insert 30 is omitted in this second embodiment, a longer filter basket 20' can be provided here than in the first embodiment, as shown in FIG 6 shown.

in the in 7 In the third exemplary embodiment shown, there is also no bell-type odor trap, so that in addition to the insert 30 of exemplary embodiment one, the inner sleeve 24 and the outer sleeve 28 of exemplary embodiments one and two are also omitted.

Thus, in the third embodiment, an even longer filter basket 20" can be provided than in the first embodiment and in the second embodiment, as in 7 shown. A conventional tubular siphon 48 can be screwed onto the outlet 22 as a replacement for the bell-type odor trap that is missing here, as in 7 shown.

Also in the third embodiment, it is possible to provide a means for receiving and retaining a lumpy water-soluble substance. For example, one can simply place an insert 30, as provided for the first exemplary embodiment, into the lower container part 6 from above before inserting the filter basket 20''.

The exemplary embodiments two and three are designed in the same way as the first exemplary embodiment, ie according to the side and longitudinal sectional views of FIG Figures 2 to 5 .

Reference list:

2

Upper tank part

4

flange

6

Lower tank part

8th

flange 8

10

pool

12

threads

14

threads

16

Unit volume

18

flange

20

filter basket

20'

filter basket

20"

filter basket

22

outlet

24

inner sleeve

26

wing

28

outer sleeve

28'

outer sleeve

29

protrusions

30

mission

32

Cup shaped section

34

striving

36

outer ring

38

hub

40

spokes

42

sealing cap

44

fastener

46

Protruding end

48

tube siphon

Claims (15)

Waste fitting for a basin, tub or the like, the waste fitting comprising: - A tubular container (2, 6) with a central longitudinal axis, the upper axial end of which is designed for attachment to a pool or tub floor and the lower axial end of which has an outlet (22); - a cymbal closure cap (42) having an adapter supporting it, having an outer ring (36) fitting in the container (2, 6) and a central hub (38) interconnected by spokes (40), and having an elongate connector (44) for connecting the closure cap (42) to the hub (38) of the adapter; and - A filter basket (20, 20', 20"), which can be inserted into or removed from the container (2, 6) from above; characterized in that the connecting element (44) for connecting the closure cap (42) to the hub (38) contains a spring and latch mechanism with which it forms a push-up drain valve together with the adapter and the closure cap (42). Drain fitting according to Claim 1, characterized in that the connecting element (44) has a tubular housing which extends in the direction of the longitudinal axis and is adapted to be connected to the hub (38), and a central connecting pin which extends in the direction of the longitudinal axis , is movably mounted in the connecting pin (42) along the longitudinal axis and has an end (44) protruding from the connecting pin for connection to the closure cap (42), the spring and latching mechanism acting between it and the connecting pin also being in the tubular housing is housed. Drain fitting according to Claim 1 or 2, characterized in that the drain fitting or the tubular container (2, 6) contains a bell-shaped odor trap opening into the outlet (22). Drain fitting according to Claim 3, characterized in that the bell-type odor trap consists of two tubular sleeves (24; 28, 28'), namely an inner sleeve (24) which fits into the outlet and on the circumference of which there are several wings (26) distributed over the circumference radially outwards and upwards beyond an upper end of the tubular part of the inner sleeve (24) away from the outlet (22), and a cup-shaped outer sleeve (28, 28 '). Drain fitting according to claim one of the preceding claims, characterized in that it has a device separate from the filter basket (20, 20', 20") for receiving and holding a lumpy water-soluble substance which is an antiseptic, a germ-killing agent, an antibacterial and/or or fungicidal substance, a deodorant, a fragrance, a perfume, a cleaning agent or another water-soluble substance or a mixture of the aforementioned substances. Drain fitting according to Claim 5, characterized in that the device for receiving and holding a lumpy, water-soluble substance has a tray which is open at the top or is designed as such. Drain fitting according to Claim 5 or 6, characterized in that the lumpy water-soluble substance is a single piece of water-soluble substance, in particular a cleaning stone or scented stone, in particular in the form of a tablet. Drain fitting according to any one of claims 5 to 7, characterized in that the means for receiving and retaining a lumpy water-soluble substance is a generally plate-shaped insert (30) fitting loosely into the container (2, 6) and having a generally cup-shaped section at its centre (32) is formed with a perforated bottom. Drain fitting according to claim 4 and according to one of claims 5 to 7, characterized in that the device for receiving and holding a lumpy water-soluble substance is formed integrally with the outer sleeve (28 ') of the bell odor trap. Drain fitting according to claim 9, characterized in that the top of the bell trap is generally flat but is provided with upwardly projecting crenellated projections (29) at its periphery spaced less than a diameter or smallest dimension of a piece of water soluble substance. Drain fitting according to one of the preceding claims, characterized in that the tubular container consists of two parts, namely an upper container part (2) in the form of a short piece of pipe with a radially extending flange (4) at one end and a lower container part (6) in In the form of an elongate tubular structure having a radially extending flange (8) at one end, the upper tank part (2) and the lower tank part (6) being adapted to be bolted together coaxially. Drain fitting according to Claim 11, characterized in that the adapter supporting the basin closure cap (42) is designed to be inserted from above into the upper container part (2) and fixed in this state, or characterized in that the screwability of the upper Container part (2) and the lower container part (6) is provided by multiple helical threads, the threads of which are narrow in relation to the pipe diameter. Drain fitting according to one of the preceding claims, characterized in that the filter basket (20, 20', 20") can be removed and reinserted while the drain fitting is mounted on a basin or a tub. Drain fitting according to Claim 11, characterized in that the filter basket (20, 20', 20") has the shape of a cylindrical pot which has a closed bottom and a filter or sieve as the peripheral wall. Drain fitting according to one of the preceding claims, characterized in that the lower container part (6) downstream of the filter basket (20, 20', 20") is provided on its circumference with at least one inlet connection (46) which extends radially outwards.

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