DK2108751T3

DK2108751T3 - Drain faucet for bathtubs and shower cubicles with flooring

Info

Publication number: DK2108751T3
Application number: DK09157552.2T
Authority: DK
Inventors: Bernd Klimpel; Frank Hennes
Original assignee: Viega Gmbh & Co Kg
Priority date: 2008-04-07
Filing date: 2009-04-07
Publication date: 2016-05-09
Also published as: EP2108751A2; EP2108751A3; ES2588022T3; PL2108751T3; EP2108750A2; EP2108750B1; PL2108750T3; EP2108750A3; EP2108751B1; ES2570403T3; DE202008004826U1; DK2108750T3

Description

The invention relates to a drain fitting, in particular for bathtubs, comprising a drain housing defining a drainage channel, which drain housing has a drain valve body which is operable by means of an adjustment member and is provided with fastening means for fluid-tight attachment to a tub base opening or basin base opening, and comprising a cover arranged above the drain valve body, the diameter of which cover is larger than the diameter of the drain valve body, the drain housing having a water supply channel.

Bathtubs are conventionally provided with an inlet fitting (supply fitting) which is installed outside the bathtub and the outflow opening of which is arranged above the bathtub.

Drain fittings for bathtubs are also known in which a single fitting performs a drainage function, an overflow function and a supply function, a housing (supply part) having an inflow channel being secured to the overflow opening arranged below the upper edge of the bathtub, which housing supports a rotary rosette for operating the drain valve. A multifunctional bathtub fitting of this type is for example disclosed in DE 87 07 328 Ul. DE 10 2006 018 022 A1 also discloses a "multifunctional fitting for a bathtub edge" comprising a drain housing that can be fitted to the tub base opening in a fluid-tight manner, a base inlet being provided on the base drain in which, for the purpose of level separation between the water flowing out of the tub and the water flowing into the tub, the mixed water escapes into the tub in a mushroom-shaped manner above a rigid, tub-side drainage hole cover, below a small circular plate. In this case, the diameter of the circular plate is substantially smaller than the diameter of the drainage hole cover. A miniaturised three-chamber system separation device integrated in three concentric rotary handles prevents backflow to the base inlet. This fitting for a bathtub edge is relatively complicated in its design and is highly complex in terms of manufacturing. This fitting has not been enforced in practice . CH-A-296 601 discloses a drain fitting having the features of the preamble of claim 1, i.e. a conduit system for supplying liquid to and removing liquid from a container, in particular a bathtub. The conduit system comprises a connection piece that is connected to the bathtub opening from below, to which connection piece a drain pipe and a supply pipe are connected and which is designed to shut off the drain pipe by means of a closure pin. The closure pin is provided with a bar and forms a plug that can be inserted from above into the connection piece via the opening in order to shut off the drain pipe. Means for diverting the supplied liquid stream when the plug is inserted are attached to the closure pin. A plate is attached to the upper end of the plug, which plate rests at a distance above the opening in the base of the bathtub when the plug is inserted, thus producing a laterally oriented annular inlet opening. A bushing is also fastened to the plug so as to act as an additional diverting member, the wall of which bushing is opposite the inlet opening of the connected supply pipe when the plug is inserted. This known conduit system is disadvantageous, in terms of hygiene, in that the water supply and the water drainage are not separated but rather both follow the same path through a threaded pipe comprising a flange .

The object of the present invention is to provide a drain fitting for bathtubs or shower trays, as a result of which drain fitting it is not necessary to have an inlet fitting that is to be installed outside the tub or tray such that there are new degrees of freedom in terms of the design of such tubs or trays. The intention is to also allow water to be supplied in a quiet manner when filling the bathtub. In particular, it is intended for contaminants from the water in the bathtub to be reliably prevented from running into the water supply channel and for the drain fitting to have a simple construction.

This object is achieved by a drain fitting having the features of claim 1.

The drain fitting according to the invention is in particular characterised in that an inlet channel which is releasable from the water supply channel and opens above the drain valve is connected to the water supply channel, which inlet channel opens below the tub-side cover, a check valve being arranged in the inlet channel.

Owing to its supply and inlet elements that form a base inlet, the drain fitting according to the invention makes it possible to fill a bathtub or shower tray in a particularly guiet manner. Owing to the fact that the water supply is configured as a base supply and owing to the covered arrangement thereof, there are new degrees of freedom in terms of the design of bathtubs. Furthermore, the fact that a conventional inlet fitting to be attached outside the bathtub is no longer required results in advantages in terms of cost. Owing to the check valve that is arranged in the inlet channel and is preferably preloaded into its closure position by means of a spring, contaminants from the bathtub are reliably prevented from running into the inlet channel and thus the water supply channel. The drain fitting according to the invention is relatively simple to produce in terms of design and manufacturing. The drain fitting according to the invention is easy to both assemble and maintain.

In order to separate the water supply from the water outlet in a tiered manner at the drain fitting, the invention provides that an annular disc-shaped or circular disc-shaped inlet piece is arranged below the cover, which inlet piece is connected to the inlet channel or formed in one piece therewith and delimits, in combination with the cover, a substantially radially extending annular gap. In this case, the water outlet is below the inlet piece, while the mouth of the water supply is defined by the annular gap delimited by the cover and the inlet piece.

This is also advantageous in that the overall height of the cover (cover cap) can be very low, and yet a high intake and as large an intake cross section as possible can be achieved. The perimeter or circumference of the annular gap results in a relatively large free flow cross section despite the narrow design of the annular gap. The tub-side surface of the cover preferably has relatively large dimensions that are in any case larger than the diameter of the drain valve body, and is also preferably slightly elevated. The cover is thus not normally perceived as uncomfortable by a person having a bath and sitting on the cover.

According to a preferred embodiment of the invention, a threaded connection piece is provided on the underside of the cover, which threaded connection piece can be screwed to a thread formed on the inlet piece. This results in a strong, releasable connection between the cover and inlet piece which enables the cover to be easily detached for cleaning. A supplied tool can be used for detaching the cover, which tool has at least two suction pads that are connected by means of a bridge-shaped handle, by means of which suction pads the tool can be releasably fastened to tub-side surface of the cover.

It is also advantageous for easy cleaning of the water outlet if, according to another embodiment of the invention, the inlet piece is annular, the thread for releasably attaching the cover (cover cap) is formed on the inner periphery of the inlet piece, and the diameter of the drain valve body is smaller than the inner diameter of the annular inlet piece.

The drain valve body can be removed from the drain housing for cleaning after the cover has been detached, without having to detach the inlet piece.

In order for a high water intake to be achieved through the base inlet despite the relatively narrow spatial conditions prescribed by the tub base opening, another preferred embodiment of the invention provides that the water supply channel and the inlet channel have an elliptical or oval cross-sectional profile. As a result, the delimited cross-sectional area of the tub base opening can be used in an optimum manner for arranging the inlet channel and the drain valve body.

Further preferred and advantageous embodiments of the invention are disclosed in the dependent claims.

The invention will be described in greater detail in the following with reference to a drawing illustrating an embodiment. In the drawing:

Fig. 1 is a section of a perspective interior view of a bathtub provided with a drain fitting according to the invention, some of the drain fitting being shown in exploded view;

Fig. 2 is a perspective view of the drain housing of the drain fitting according to the invention without a tub-side cover and without an inlet piece to be fitted on the tub side;

Fig. 3 is a perspective view of the drain housing of Fig. 2 and the inlet piece to be fitted on the tub side;

Fig. 4 is an exploded view of the cover, the inlet piece and a fastening flange of the drain fitting according to the invention;

Fig. 5 is a side view of the inlet piece together with the fastening flange and the detached cover;

Fig. 6 is a plan view of the inlet piece connected to the fastening flange and a sectional view along the line A-A in Fig. 5;

Fig. 7 is a cross-sectional view along the line B-B in Fig. 5;

Fig. 8 is a cross-sectional view along the line C-C in Fig. 6; and

Fig. 9 is a perspective view of the inlet piece comprising an inlet channel, and an exploded view of a check valve arranged therein.

The drain fitting shown in the drawing comprises a drain housing 1 that comprises a connecting-piece-shaped portion 1.1 and a planar drainage channel 1.2 integrally moulded thereon. A rising portion 1.3 is integrally moulded on the drainage channel 1.2, which portion ends in a drain connection piece 1.4. Together with the planar drainage channel 1.2, the portion 1.3 of the drain housing forms a stench trap. An outflow bend 3 is connected to the drain connection piece 1.4 by means of a union nut 2. The two end portions of the outflow bend 3 form an angle of approximately 45°.

Two connection pieces 1.5, 1.6 are formed on the sides of the connecting-piece-shaped portion 1.1 of the drain housing (drain body) 1. The larger (1.6) of these two connection pieces is for connecting an overflow pipe 4 that is releasably attached to an overflow housing 5 arranged below the upper tub edge. The overflow housing 5 is secured to an overflow opening formed in the tub wall 6. The overflow opening in the tub wall 6 is covered on the inside of the tub by a rotary rosette 7 which functions as an actuation element for a drain valve integrated in the drain housing 1. The rotary rosette 7 is coupled to a Bowden cable (not shown) via a mechanism, the bottom end of which cable is connected to a lever mechanism by means of which a drain valve body 8 of the drain valve can be raised and lowered. The drain valve body 8 may also be referred to as a valve cone. Fig. 2 shows a lever 25 that is attached to a rotational shaft and is provided with a slit for nesting the Bowden cable. The lever 25 is arranged in a housing portion 1.11 of the drain fitting, which housing portion can be closed by means of a removable cover 26 (cf. Fig. 3).

The connection piece 1.6 for the overflow pipe 4 is provided with an outer thread on which a union nut 9 is screwed. The connecting-piece-shaped portion 1.1 of the drain housing 1 has a peripheral flange 1.7 on the upper end thereof, by means of which the drain housing is secured to the underside of the bathtub. An upwardly projecting collar 1.8 is formed inside the flange 1.7 and protrudes into the drain opening of the tub base when the drain fitting is assembled. The drain housing 1 comprises an annular shoulder 1.9 inside the collar 1.8, which annular shoulder defines an outlet opening 11 having an annular valve seat and is inclined towards the outlet opening 11 (cf. Fig. 2). The outlet opening 11 can be closed by means of the valve cone (drain valve body) 8 which can be lowered for this purpose onto the valve seat by actuating the rotary rosette 7 by means of the Bowden cable and the lever mechanism.

The connecting-piece-shaped portion 1.1 of the drain housing 1 is also provided with threaded holes. The threaded holes are preferably formed by metal threaded sleeves that are integrated in or cast into the drain housing 1 made of plastics material. The threaded holes or threaded sleeves are arranged between the flange 1.7 and the collar 1.8 of the drain housing 1, the collar 1.8 comprising, in the region of the threaded holes or threaded sleeves, cavities 1.81 directed towards the outlet opening.

An annular fastening flange 12 also serves to attach the drain housing 1 to the underside of the tub 10, which fastening flange is placed inside the edge of the base opening in the tub 10 for this purpose. The edge of the base opening is slightly lower than the tub base which transitions into the edge of the base opening formed in the manner of a peripheral shoulder via an inclined annular surface.

The fastening flange 12 has drilled holes or holes 12.1 that are flush with the threaded holes (threaded sleeves) of the drain housing. The fastening holes 12.1 are formed in bulgings 12.2 of the fastening flange 12 that protrude inwardly. The fastening flange 12 also comprises a downwardly directed collar 12.3 that is dimensioned such that it can positively engage the collar 1.8 of the drain housing 1. Vertical slits are recessed in the collar 1.8 that extend as far as the annular shoulder 1.9 having the outlet opening 11.

Fastening screws 13 are inserted into the holes 12.1 of the fastening flange 12, which fastening screws are screwed and tightened in the threaded holes of the drain housing 1 from inside the tub 10. In this case, an annular profile gasket 14 made of rubber or the like and arranged between the flange 1.7 of the drain housing and the fastening flange 12 is pressed in a sealed manner on the edge of the outlet opening in the tub base .

Reference numeral 15 denotes a cover (cover cap) that covers the drain valve body (valve cone) 8, and yet leaves a drainage gap 16 of several millimetres when in the assembled state on the tub base (cf. Fig. 3 and 7). The cover 15 is preferably made of metal, for example brass, and chrome-plated, or is provided with another surface coating. The top side of the cover 15 is slightly convex. In the embodiment shown, the cover 15 is substantially circular disc-shaped. Other shapes are however also conceivable; the cover 15 can also be substantially square for example.

The drain housing 1 comprises a water supply channel (overflow channel) 1.10. The water supply channel 1.10 is connected to the smaller (1.5) of the two connection pieces of the drain housing (drain body) 1. The connection piece 1.5 is also provided with an outer thread. In the embodiment shown, an arcuate connection pipe piece 17 is connected to the connection piece 1.5 by means of a union nut 18. The function of the connection pipe piece 17 is to connect a water supply line (not shown).

The water supply channel (overflow channel) 1.10 is integrated in the wall of the connecting-piece-shaped portion 1.1 of the drain housing 1. Said water supply channel passes through the annular shoulder 1.9 at a radial distance from the circular disc-shaped outlet opening 11 and the drain valve body 8 and ends in a flush manner by the upper edge of the collar 1.8. In this case, the upper edge of the water supply channel 1.10 is oblique. Said upper edge extends substantially in parallel with the surface of the conical shoulder 1.9.

An inlet channel 19 is connected to the water supply channel 1.10, which inlet channel opens, in the assembled state, above the drain valve body 8 and below the cover 15. In the assembled state, the inlet channel 19 is pushed or inserted into the water supply channel 1.10. Figs. 4 and 9 show that the end of the inlet channel 19 that can be inserted into the water supply channel 1.10 slopes with respect to its longitudinal axis. The water supply channel 1.10 and the inlet channel have an elliptical or oval cross-sectional profile (cf. Fig. 6).

The inlet channel 19 is provided, on the outer side thereof, with a ring groove 19.6 that also extends obliquely towards the longitudinal axis and into which a sealing ring 21 is inserted. Alternatively, for this purpose the water supply channel 10 may also be provided, on the inner side thereof, with a ring groove and a corresponding sealing ring.

An annular disc-shaped inlet piece 19.1 is formed on the inlet channel 19. The longitudinal axis of the inlet channel extends substantially at right angles to the annular disc-shaped inlet piece 19.1. The inlet piece 19.1 has downwardly projecting spacers 19.7, 19.7'. The spacers 19.7, 19.7' have spacers or portions 19.7 that are annular or designed as sockets and are arranged such that at least two of said spacers or portions each receive and engage one head of one of the fastening screws 13 with a positive fit. The heads of the fastening screws 13 received in the spacers 19.7 in this manner comprise ring grooves 13.1 having clamping rings (rubber rings) 22 inserted therein. The clamping ring 22 held in the ring groove 13.1 with a positive fit results in a frictional connection between the fastening screw 13 and the spacer 19.7 of the inlet piece 19.1. Furthermore, the sealing ring 21 held on the inlet channel 19 results in a frictional connection between the inlet piece 19.1 and the drain housing 1. In addition, web-shaped spacers 19.7' are formed on the underside of the inlet piece 19.1.

In the assembled state, the inlet piece 19.1 integrally moulded on the inlet channel 19 rests on the fastening flange 12 by means of the spacers 19.7, 19.7'. The inlet piece 19, the spacers 19.7, 19.7' of which and the fastening flange 12 delimit or define the drainage gap 16 that is substantially annular, the annular shape only being broken by the spacers 19.7, 19.7'. The outer diameter of the inlet piece 19 corresponds to the outer diameter of the fastening flange 12 or is slightly larger than the outer diameter of the fastening flange 12. A check valve 20 is integrated in the inlet channel 19. The check valve 20 has a plate-like closure element 20.1, on the underside of which a valve shaft 20.2 protrudes, which is guided in an axially movable manner in the inlet channel 19. A helical spring 20.3 is fitted to the valve shaft 20.2, which spring is secured against slipping off the valve shaft 20.2 by means of a securing element 20.4 connected to the end of the valve shaft. In the embodiment shown, the securing element consists of an acorn nut that is screwed onto a thread formed on the end of the valve shaft 20.2. The end of the helical spring 20.3 facing away from the acorn nut 20.4 is supported on a shoulder 19.20 formed in the inlet channel 19. The valve shaft 20.2 protrudes, with the end thereof facing away from the closure element 20.1, from the inlet channel 19 into the water supply channel 1.10. Owing to the oval or elliptical cross-sectional shape of the water supply channel 1.10 and the inlet channel 19, water can flow past the side of the valve shaft 20.2 in order to fill the tub. In the process, the water pressure raises the closure element 20.1 and the valve shaft 20.2 against the force of the helical spring 20.3. If the mixed-water supply valve (not shown) associated with the drain fitting according to the invention is closed, the underside of the plate-shaped closure element 20.1 is no longer pressurised by the water. The helical spring 20.3 then causes the check valve 20 to close the inlet channel 19 by means of the closure element 20.1 thereof. The closure element 20.1 is provided with a peripheral seal. For this purpose, a ring groove is formed into the edge of the closure element 20.1 and a sealing ring 20.6 is located therein. The check valve 20 is accessible from the inside of the tub for maintenance.

In order to prevent the inlet channel 19 from detaching from the water supply channel 1.10 as a result of the water pressure, one (13') of the fastening screws is provided with a threaded hole 13.2 for screwing in a retaining screw 23 that fixes the inlet piece 19.1. In this case, the threaded hole 13.2 opens onto the upper side of the head of the fastening screw 13' (Figs. 6 and 8). A hexagon socket screw is preferably used as the retaining screw 23. Fig. 3 shows a corresponding hexagonal spanner 30.

For the purpose of screwing in the retaining screw 23, the inlet piece 19.1 has a drilled hole (aperture) that opens into the hollow space of one of the annular spacers 19.7. The head of the retaining screw 23 is received in a recess 19.8 in the upper side of the inlet piece 19.1 so that the screw head does not project beyond the upper side of the inlet piece 19.1.

The cover (cover cap) 15 is releasably connected to the inlet piece 19.1. For this purpose, the annular inlet piece 19.1 comprises a thread 19.10 on the inner periphery thereof and the cover 15 is provided with a threaded connection piece 15.1 on the underside thereof that can be screwed to the thread 19.10 of the inlet piece 19.1. The threaded connection piece 15.1 is preferably integrally formed with the cover 15. The thread (inner thread) 19.10 of the inlet piece 19.1 is also formed on a threaded connection piece. In this case, the threaded connection piece 19.11 extends in the direction of the cover 15. The threaded connection pieces 15.1, 19.11 are arranged concentrically to the circular disc-shaped cover 15 and the annular disc-shaped inlet piece 19.1, respectively.

The inner diameter of the threaded connection piece 19.11 of the inlet piece 19.1 is larger than the outer diameter of the drain valve body (valve cone) 8. The drain valve body 8 is provided on its upper side with a handle or a protrusion 8.1 that has an opening. The drain valve body can thus be easily removed by means of the threaded connection piece 19.11 of the inlet piece 19.1 for cleaning, after the cover cap 15 has been detached. In order to detach the cover cap 15, a dismantling tool 40 is provided that has suction pads. The suction pads 41 to be placed on the upper side of the cover cap 15 by suction are interconnected by means of a bridge 42 acting as a handle. The outer diameter of the cover cap 15 corresponds to the outer diameter of the inlet piece 19.1 or is slightly larger than the outer diameter of the inlet piece 19.1.

In the assembled state, the cover 15, together with the inlet piece 19.1, delimits a radially extending annular gap. The inlet piece 19.1 has a plurality of radially extending ribs 19.12 on the upper side thereof, which ribs are preferably arranged so as to be regularly distributed over the periphery of the inlet piece 19.1. The ribs 19.12 end on the outer periphery of the inlet piece 19.1. Said ribs produce a starshaped water jet when the tub starts to be filled via the base inlet of the drain fitting. A smooth surface region 19.13 that is lower than the vertex or crown lines of the ribs 19.12 is formed concentrically around the threaded connection piece 19.11, which surface region is in turn concentrically surrounded by the region comprising the ribs 19.12. The inlet channel 19 opens on the smooth surface region 19.13.

The drain fitting according to the invention makes it possible to fill a bathtub 10 with water and to empty the bathtub which is filled with water. The circular disc-shaped inlet piece 19.1 produces a tiered separation of the water supply from the drain. In this case, the water supply region is positioned above the water drainage region.

Claims

A drain fitting, especially for a bath, with a drain housing (1) defining a drain channel and having a drain valve body (8) operable by means of an actuator element and provided with liquid-tight fastening means (12, 13) to a bottom or seam opening, and having a cover (15) disposed above the drain valve body (8), the diameter of which is greater than the diameter of the drain valve body (8), the drain housing (1) having a water inlet channel (1.10), characterized by an inlet conduit (19) which can be released therefrom and opens over the drain valve and opens under the cover (15), where an annular or circular disc-shaped inlet (19.1) is arranged under the cover (15). connected to the inlet duct (19) or integrally formed with the inlet duct, and which, in connection with the cover (15), limits a ring gap which extends radially, where water supply the mouth of the bait is defined by the ring gap which is limited by the cover (15) and the inlet piece (19.1) and the water outlet is below the inlet piece (19.1) so that the inlet piece (19.1) causes a floor-like separation between the water inlet and the water outlet and where provided a check valve (20) in the inlet duct (19).

Drain fitting according to claim 1, characterized in that the check valve (20) has a disc-shaped closing element (20.1), on the underside of which a valve shaft (20.2) protrudes axially movable in the inlet channel (19), wherein a screw spring ( 20.3) is mounted on the valve shaft (20.2), which screw spring is secured against sliding of the valve shaft by means of a securing element (20.4) connected to the end of the valve shaft, preferably a top nut.

Drain fitting according to claim 1 or 2, characterized in that on the underside of the cover (15) is provided a threaded plug (15.1) which can be screwed together with a thread (19.10) formed on the inlet piece (19.1).

Drain fitting according to claim 3, characterized in that the inlet piece (19.1) is formed annularly in which the wind (19.10) is formed at its internal extent.

Drain fitting according to one of claims 1 to 4, characterized in that the inlet piece (19.1) has a threaded plug (19.11) extending to the cover (15).

Drain fitting according to one of claims 1 to 5, characterized in that the diameter of the drain valve body (8) is smaller than the inner diameter of the annular inlet piece (19.1).

Drain fitting according to one of claims 1 to 6, characterized in that the inlet piece (19.1) has on its upper side several ribs (19.13) extending radially and preferably arranged evenly distributed over the extent of the inlet piece (19.1).

Drain fitting according to one of claims 1 to 7, characterized in that the fastening means for liquid-tight fastening of the drain housing (1) to a vessel or basin opening comprises threaded bores provided in the drain housing (1), a fastening flange (12), having a plurality of fastening holes (12.1) and fastening screws (13, 13 ') provided to the fastening holes (12.1) and can be screwed into the threaded bores, wherein at least one (13') of the fastening screws has a threaded bore (13.2) a retaining screw (23) fixing the inlet piece (19.1), the threaded bore (13.2) of the retaining screw (23) opening at the main upper side of the fastening screw (13 ').

Drain fitting according to one of Claims 1 to 8, characterized in that the annular inlet piece (19.1) has at its underside spacers (19.7, 19.7 ') projecting in a downward direction.

Drain fitting according to claims 8 and 9, characterized in that the spacers (19.7) are designed annularly for forming and / or frictionally closing the head of at least one of the fastening screws (13).

Drain fitting according to one of claims 8 to 10, characterized in that at least one of the fastening screws (13) is provided on its head with a clamping ring (22), wherein the clamping ring (22) is held in a ring groove (13.1) formed at the extent of the head of the fastening screw (13).

Drain fitting according to one of claims 1 to 11, characterized in that the inlet duct (19) is removably inserted in the water inlet duct (1) of the outlet housing (1), the inlet duct (19) on its outside, and / or the water inlet duct (1.10) on its inside is provided with a sealing ring (21).

Drain fitting according to one of claims 1 to 12, characterized in that the water supply channel (1.10) and the inlet channel (19) have an elliptical or oval cross-sectional profile.

Drain fitting according to one of claims 1 to 13, characterized in that the drain valve body (8) is provided on its upper side with a handle and / or a projection (8.1) having an opening.