WO1988002799A1

WO1988002799A1 - Floor drain

Info

Publication number: WO1988002799A1
Application number: PCT/SE1987/000463
Authority: WO
Inventors: Lennart Rundberg
Original assignee: Lennart Rundberg
Priority date: 1986-10-13
Filing date: 1987-10-13
Publication date: 1988-04-21
Also published as: SE8604330L; SE8802203L; DK316088D0; DK316088A; FI882811A0; SE8604330D0; SE455428B; SE8802203D0; FI882811A

Abstract

A floor drain is provided with a cupshaped main part (I) to receive waste water and having a drain trap. The pipe connection piece (11), to which a discharge pipe (211-219) is to be connected, is formed as a straight tube portion, preferably as a straight bell. The longitudinal axis (13) of said bell forms, with a horizontal plane, an angle alpha, being substantially greater than 0° and substantially less than 90°, preferably equal to 45°. Furthermore said bell is shaped in such a way, that it with its higher located portion extends to a level being located above the water surface (33) of said drain trap. The end of said straight tube portion (11), which is located inside main part (I), is shaped with such a profile (71, 73), that the connected waste conduit (211-219) can be placed thereon or inserted into the pipe connection piece so long, that highest located part of the connected conduit extends up to the level of the upper portion of the main part (I) of the floor drain. The water trap of the floor drain is preferably formed by a projection (11b) on said bell (11), having a horizontal edge (73), and by a drain trap casing (75). According to the invention, as is conventional, a strainer is arranged, covering the opening of the floor drain. In the stainer a vacuum valve may be arranged. According to the invention there is also provided a ring of a new type for clamping of a floor carpet to be connected to the upper part of said floor drain. The floor drain can be provided with a central means (21), located at the upper surface, around which a cutting tool can be turned around to cut out an appropriate circular opening in the floor carpet.

Description

Fl oor drain

The present invention relates to a floor drain for residential an office buildings but also for other uses.

A purpose of the invention is to provide a floor drain which, in standard design, is utilizable for many cases of the direction of the outlet pipe, to which the floor drain is to be connected. Up to now, on has, for different cases, been forced to use floor drains of different designs for fitting to the connected pipe conduit.

Another purpose of the invention is to provide a floor drain, whi together with the connecting portion of the outlet pipe conduit has the smallest possible vertical dimension in the different cases cited above Another purpose of the invention is to provide a floor drain requiring a minimum number of measurements in the positioning of not onl the floor drain but also of the conduits connected to the floor drain.

Still another purpose of the invention is to provide a floor drai wherein the cutting and the jointing of a carpet connected thereto can done comfortably and with the highest possible accuracy.

Other purposes of the invention will become apparent from the following detailed description.

A floor drain according to the invention comprises a cupshaped ba or main part, adapted to receive waste water and to form a drain trap, having an upper edge portion for connection to a corresponding opening i the floor where said floor drain is to be placed, and a pipe connection piece, to which a waste conduit extending from said floor drain is inten to be connected, said pipe connection piece having the shape of a straig pipe portion to be connected to said waste conduit, the longitudinal axi of said straight pipe portion having, in relation to a horizontal plane, angle Λ being substantially greater than 0° and substantially less than 90°, said straight pipe portion extending, with the highest located part thereof, to a level above the water surface of said drain trap, this highest located part being formed by an end of said pipe connection pipe coming up to the level of that upper portion of said floor drain main pa which is intended to be located in the opening in the floor where to pla said floor drain, and a part of said straight pipe portion defining the level of said drain trap, and being characterized in that the inlet end said straight pipe portion has a profile formed in such a way that the generatrices of said straight pipe portion extend at least up to the annular line being formed by the intersection of said straight pipe porti and a plane orthogonal to the axis of said straight pipe portion and passing through the highest point of said pipe portion.

Thus^the profile of the inlet end of said straight pipe portion is such that the connected waste conduit can be inserted into or placed on said pipe connection piece so far that the highest located part of the connected waste conduit extends up to the level of the upper portion of said floor drain main part. Hereby the h ghest located point of said connected waste conduit can be positioned just below the covering set rainer belonging to the floor drain, approximately at a distance therefro coinciding with the thickness of the material in the wall portions of the floor drain, since above the outlet connection piece and below said cover strainer generally and in the conventional way a water surface casing is provided. The most important advantage of the design indicated above of the floor drain according to the invention is that the vertical extension of the floor drain as well as the connecting part of the waste conduit coupl thereto is as small as possible and that simultaneously the floor drain directly or by the interposition of a tube bend is connectable to the end part of a waste conduit extending towards the floor drain opening in an arbitrary angle in relation to the horizontal plane.

By employing a floor drain according to the invention, among other things, the present disadvantage is avoided, consisting of the fact that is necessary to manufacture and keep in stock different types of floor drains, and also the sometimes appearing disadvantage that the correct floor drain is not at hand at the working place/in the stock or that the floor drain is not correctly positioned in a construction operation.

From NO C 25 362 a floor drain according to the preamble of the present claim 1 is previously known. At the cupshaped main part of this previously known floor drain, the outlet connection piece is located in t angle of 45° and has the shape of a single discharge opening without any particular parts extending into the basic part of the floor drain. The water surface of the drain trap is defined by the lowest point of the outlet opening into the cupshaped base, thus by a part of the outlet connection piece. The piece of pipe, which is intended to be connected to the outlet connection piece, cannot be inserted into the inner part of th floor drain main part, this resulting in a significant constructional height of the drain together with the waste conduit to be connected. A solution of this problem is presented by the use of connectable pieces of pipe not being standard, e.g. those shown in DE Al 3 509 717. this application a waste drain for surface water is described, which is provided with a drain trap but only with a check valve. However, in thi waste drain known in the art a very small total overall height will be obtained partly by the use of a special piece of pipe to be connected, partly by the fact that the outlet connection piece of the floor drain a very short dimension in its longitudinal direction. Such a short longitudinal dimension of the outlet connection piece is naturally not possible with standard pieces of piping.

From GB 13 245, 1892, a floor drain is previously known having a discharge connection piece similar to the discharge connection piece according to the present invention. However, this discharge socket is formed by a bent tube portion. In addition the end which is located insi the floor drain, of this bent tube portion is cut off along a horizontal line. This floor drain therefore presents great structural differences compared to the floor drain according to the invention.

Finally the floor drain disclosed in DE Cl 3 312 654 may be mentioned, wherein an outlet socket is not arranged. Instead the straigh cut-off end of the pipe to be connected extends into the floor drain. Th water trap is formed by a separate, intricately designed drain trap casi which is intended to be placed on the pipe end extending into this previously known floor drain. The water surface in the drain trap thus i not defined by a part of a straight discharge connection piece. In preferred embodiments of the invention the end of the straight tube portion, which is located inside the base of the floor drain, is straightly cut off along a plane orthogonal to the vertical plane passin through the axis of the straight pipe portion. This cut-off part is preferably located in the upper part of the inlet end of the straight tu portion. Preferably this cut-off part can have the angle 90° related to the axis of the straight tube portion.

In addition the level of the water surface of the drain trap can b defined by a protrusion on the lower part of the straight pipe portion. This protrusion can have a horizontal edge or rim and may in addition be made with a suitable rounding to facilitate the flow over this edge. By means of this protrusion the height of the water surface can easily be changed in different designs of the floor, so that for instanc lower level of the water surface is obtained when the floor drain is provided with lateral inlets. In addition it is preferred according to the invention that the pip connection piece has the shape of a bell provided with suitable gaskets sealing against an inserted part of a waste water pipe.

According to another aspect of the invention a floor drain is provided comprising a cupshaped main part, adapted to receive waste water and to form a drain trap, having an upper edge portion for connection to a corresponding opening in the floor where the floor drain is to be place and a pipe connection piece, to which a waste conduit extending from the floor drain is intended to be connected, said pipe connection piece being shaped as a straight pipe portion to be connected to said waste conduit, and the main part having an upper circular portion intended to be connected to a corresponding opening in the floor where said drain is to placed, said floor drain being characterized in that the outer main outli of this upper circular part is tapering downwards with a taper angle bein preferably about and maximally 45°, and that said pipe connection piece forms an angle with a vertical plane at least equal to said taper angle. It is preferred that these angles both are equal.

By this design the floor drain in an easy way can be adjusted to different heights in the floor, where the floor drain is intended to be placed. Evidently the floor drain can be displaced along the axial direction of said straight pipe portion, whereby the upper portion of the opening in the floor, to which the upper edge portion of the floor drain is intended to be connected, can be made in an easy way.

The advantage of this design for the mounting, is even more pronounced, if the centre axis of said straight pipe portion passes throug the centre point of the upper circular portion of said floor drain, this portion being located at the top or in the level of the surface of the floor, which is connected thereto. Additionally the main part of the floor drain can be made so that its wall surfaces, except for the wall portion, in which the discharge connection piece is arranged, have generatrices parallel to the centre axis of the discharge connection piece.

In a further aspect of the invention a floor drain is provided comprising a cupshaped main part, adapted to receive waste water and to form a drain trap,, having an upper edge portion to be connected to a corresponding opening in the floor, where the floor drain is to be placed, and a pipe connection piece, to which a waste conduit extending from said floor drain is intended to be connected, said main part having an upper circular portion intended to be connected to a corresponding opening in floor, where said floor drain is to be arranged, and said floor drain comprising a ring for fastening of a circular marginal portion of a flo carpet, which is to be connected to the floor drain, said floor drain b characterized in that said ring comprises an external circular part wit external portion for clamping of said marginal portion, and a circular internal part, matching with said external part, for retaining said external part, wherein ramps cooperating with each other in the externa and the internal part are adapted to fasten, depending on the rotationa position of said parts in relation to each other, said external part in a desired height level adapted to the thickness of said floor carpet.

In a development hereof one of these annular parts is provided wi mark cooperating with a scale placed on the other part, on which scale height level of said outer part can be read, when the height level is adjusted by rotation of said annular parts with respect to each other.

By means of this clamping ring a gap, which is adjustable in heig is obtained in an easy way between the outer part of the clamping ring the inner edge of the floor drain. This is further achieved without usi threads or similar devices, as is previously known, see SE A 8503387-6. clamping ring according to the invention is additionally su ted to be screwed on to the main part of said floor drain. One of said circular parts in addition is in direct engagement with a shoulder inside said fl drain.

According to another aspect of the invention a floor drain is provided comprising a cupshaped main part, adapted to receive waste wate and to form a drain trap, having an upper edge portion to be connected t corresponding opening in the floor, where said floor drain is to be plac and a pipe connection piece, to which a waste conduit extending from sai floor drain is intended to be connected, and a strainer covering said ma part, said floor drain being characterized in that a vacuum valve is arranged in said strainer.

This vacuum valve comprises a cover or lid, which is tightly arran in an opening in the grid or strainer. Further two valve seats are forme partly by a shoulder in this bore, partly by an annular element supporte by said cover by means of support means arranged inside said valve. A va element in the shape of a ring cooperates with these valve seats. Said annular element is sealingly connected to an opening in the upper part, which is located inside said floor drain and covers the drain trap and its water surface.

According to another aspect of the invention a floor drain is provided comprising a cupshaped main part, adapted to receive waste water and to form a drain trap, hav ng an upper edge portion to be connected to a corresponding opening in the floor, where said floor drain is to be placed, and a pipe connection piece, to which a waste conduit extending from said floor drain is intended to be connected, said main part having an upper circular portion intended to be connected to a corresponding opening in the floor, where said floor drain is to be placed, said floor drain^"being characterized in that a centre means is arranged at the centr of said upper circular part portion of said floor drain for cooperation with a cutting tool, which is rotatable around said centre means.

This centre means, which preferably can be a blind hole in the drai trap casing, and the associated cutting tool make it very easy for an installer to cut an appropriate opening in a floor carpet to be connected to said floor drain.

The invention will now be described in more detail in relation to the accompanying drawings, which illustrate an embodiment of the floor drain according to the invention, in which

Figure 1 shows a side wiew of the floor drain, partly sectionally,

Figure la shows a drain trap casing of the floor drain in a perspective view obliquely from the top and the side,

Figure 2 shows the drain according to Figure l seen from the top after removing the covering strainer belonging to the floor drain,

Figures 3 and 4 show, seen from above and from the side, respectively, the covering strainer of the floor drain with a vacuum valv

Figures 5 and 6 show in a perspective view and in a vertical detail section, respectively, a composite ring for attaching a floor carpet to the floor drain according to Figure 1,

Figure 7 shows in a perspective view a part comprised in the vacuum val e according to Figures 3 and 4,

Figure 8 shows in a perspective view a tool according to the invention for cutting a floor carpet to be connected to the floor drain, and

Figure 9 shows in a vertical detailed sectional view another embodiment of a composite ring of a similar kind, as is shown in Figures The basic part I of a floor drain according to Figures 1 and 2, w preferably is produced in one piece by injection molding a thermoplasti material, for instance ABS-resin, comprises two lateral walls opposite each other, a front wall 1 and a rear wall 3, which walls together with end walls 5 and 7 opposite to each other form a cup pan for receiving w water and a space for a drain trap with a connection to an outwards extending discharge conduit. The main part I further comprises an upper, circular portion 9 located in a horizontal plane, to be connected to the floor, in which the floor drain is to be placed. A pipe connection piece, which can have the shape of a bell 11, to which an outgoing discharge conduit can be connected, is made in one pie with the front wall. The bell extends from this wall into the floor drai in such a way that its axis 13 forms an angleoC with a horizontal plane where ^'s substantially greater than 0° and substantially less than 90°, an angle <λ between 20° and 70° being preferred, particularly between 30° and 60°, and most often an angle C = 45° being preferred. A waste pipe is connected to the bell 11 usually by means of pipe fitting, one end part of which is inserted into the bell and is received by the stop notch 15, simultaneously with being sealed to said bell by means of the sealing gasket 17. Instead of the stop notch 15 onl an abutment edge can be arranged not having any cylindrical, inner, annular flange. The connector piece is usually a tube bend having differ standard angles as 90° and 45°. The inner section of the bell can be enlarged in one part 19 of said bell, where it is connected to the front wall 1 of the cupshaped main part I. The enlargement has for purpose to receive all of or a substantial part of the inner bent wall portion of a tube bend inserted into the bell. In Figure 1 a 45° tube bend has been indicated with dotted lines 211, 213 and a 90° tube bend with corresponding lines 215, 217, in an assembled position. The first tube b can, as is apparent, be used to connect a horizontal waste conduit to th floor drain and the latter bend can be used to connect a waste drain to floor, this conduit being parallel to the front wall 1 of the part I. Sa tube bends may naturally be used, after appropriate rotation inside the bell 11, to connect waste conduits extending in different directions fro what has been supposed above. In the shown cases the '-enlargement 19 provides the advantage, that the outlet waste conduit can be arranged somewhat higher and somewhat more closely to the wall 1, respectively, t in the case where there is no enlargement. The floor drain and its connecting tube piece will hereby be correspondingly less spacedemanding in the actual directions.

In Figure 1 it has been indicated, in broken lines 211, 219 the outlet leg of a tube bend, the inlet leg of which is intended to be fitte into the bell 11. The outlet leg is made with a lesser diameter, for instance 50 mm, than the inlet leg, which can be, for instance, 75 mm. It is seen, that the bottom part of the waste conduit, which has been indicated by the line 219, when using such a reduced tube bend, can be placed higher than when using a tube bend without reduced part. Since a smallest prescribed slope of the waste conduit must be arranged, this will mean that the floor drain with its waste conduit can be placed in a thinn floor structure than should be required otherwise, or that the length of the waste conduit in the floor structure of a given thickness can be increased correspondingly. In a vertical section according to Figure 1 the front wall 1 is perpendicular to the axis 13 of the bell 11 and has a slope of 45° in relation to the horizontal plane. In the same vertical section the rear wall 3 forms an angle of 90° with the wall 1 and thus has similarly a slope of 45° in relation to the horizontal plane. Particularly for the rear wall it is true, that its external surface in its main portion is formed by a generatrix parallel to the centre axis 13 of the bell 11. Thi may also be true for the other walls forming the cupshaped main part I, except for the wall portion where said discharge connection piece 11 is arranged. Hereby it will always be possible to displace the cupshaped mai part I in parallel to the centre axis 13, essentially independent of the way in which the main part I is mounted to the floor. This has great importance, among other things when replacing the floor drain, or in such cases where top floor material is arranged.

Instead of making the tube socket in the shape of a bell 11 it is also possible to make the tube connection piece as a straight cylindrical tubeshaped part for connection to a bell part of the waste conduit. For such a connection the inner edge of the abutment notch 15 can be prolonge in the direction towards the outlet end of inner tube portion 11.

In its upper portion the main part of the floor drain can, as is s-hown, be made with three circular, parallel ridges or tongues 31, 33, an 35 passing around the whole floor drain, making it more stiff in the desired way. The tongues 31 and 33 form therebetween an upper groove 41, and the tongues 31 and 33 form a lower groove 43. The ridges have in turn, seen from above, a decreasing diameter in such a way, that the upper portion of the main part I, which is provided with ridges, has an exter profile or contour, which has a slope inwardly - downwardly correspondi to the slope of the discharge connection piece, in the shown case 45°, and fits into a correspondingly conical surface in an opening for the fl drain, which can be made or shaped in the floor in question. The groove is intended as an attachment means for the tying wire for the temporary fixing of the floor drain before the final mounting, and the groove 41 i intended to receive a sealing compound or a so called diaphragm gasket. The lower side 36 of the annular upper part of the drain can be us as a support surface, if it is desired to arrange the drain on horizonta beams, which may extend tangentially relative to the floor drain and be distributed around its periphery.

Through the uppermost centre point 21 of that circular portion of drain, which is provided with the tongues, the centre line 13 of the out bell 11 extends in the embodiment shown. This fact together with the condition given above, that the lateral walls 1 and 3 of the main part I have a slope of 45° in relation to a horizontal plane, highly facilitate the work of performing the measurements required in installing the floor drain and the pipes to be connected.

However, it is not necessary for the function of the floor drain t the centre line 13 passes through the centre point 21, so y another posi of the muff axis 13 may be approppriate in special cases.

The floor drain normally has an inlet from above, which is covered by a strainer, which can have the appearance shown in Figures 3 and 4 an which will be described in more detail furtheron. The drain may in addit have two lateral inlets through openings 51 and 53 in each end wall 5 an 7, respectively, of the main part 1. In this case inlet connection piece 55 and 57, respectively, are connected to the openings 51 and 53, which inlet connection pieces are made integrally with the walls 5 and 7, respectively, and with a horizontal wall portion 61, connecting the uppe edge of the cup, formed by the walls 1,3,5 and 7, to that upper circular portion of the floor drain formed by the ridges 31-35. The inlet connecti pieces 55 and 57 have inner notches 65 and 67, respectively, for gaskets sealing against the inlet conduits connected to these connection pieces. can be remarked, that the openings 51, 53 and the end walls 5 and 7, respectively, suitably are not made until the positioning of the floor drain, when it is known if one of or both connecton pieces have to be used. The inlet connecton pieces 51 and 57 may also be made without inner grooves and gaskets, in a shape of single tube spigots, on which tube bel of connected tube pieces can be placed.

In Figure 1 it is shown how the upper portion 11a of the outlet muf 11 is cut off along a plane 71 orthoganal to the bell axis 13, and how th lower portion of the bell in its top part has a prosection lib, which is cut off along a horizontal plane, so that a spillway 73 is formed for the protruding portion lib, which spillway defines the water surface of the drain trap of the floor drain. This is formed by the bell 11 together with a drain trap casing 75, see also Figure la, extend g between the en walls 5 and 7 of the main part I and having an angular arcshaped main shape, seen from the side as in Figure 1, with an angle of approximately 45°. The casing 75 has its upper end part 77 located adjacent to the upper edge of the outlet muff 11, and its lower end part 79 located relatively close to the connection of the outlet bell to the front wall 1 of the main part I. The casing rests on a number of shoulders, not shown, on and in the cupshaped base part I, and between the casing and both end walls 5 and 7, in a notch in the casing, a gasket 81 has been placed, whi can also seal between the casing 75 in the area of its upper end part 77 and the corresponding parts of the outlet socket 11 or the cupshaped base part I. The gasket 81 can extend around the whole edge of the drain trap casing 75 and suitably is an 0-ring. The drain trap casing can, however, homogenously joined to the main part I of the floor drain, as made integrally or by glueing. The lower end of the casing 75 is defined by th horizontal edge 80, between which and the spillover 73 of the outlet bell a distance of 50 mm is arranged, which distance is prescribed in Swedish building code and also in Nordic rules for water traps of the type in question.

The drain trap casing can in the usual way be provided with a cleaning opening and a cleaning plug belonging thereto (not shown).

In its lower part 79 the drain trap casing 75 has been bent outward from the outlet bell, so that the water flow around the lower rim 80 of t casing should be as favourable as possible. Approximately opposite to the inlet connection pieces 55 and 57 the drain trap casing has been designed with obliquely inwards d rected wall parts 93 and 95-, respectively, adapt to divert water originating from the inlet sockets to the space between t drain trap and the rear wall 3 of the main part of the floor drain. In Figure 1 the water surface resident in said space has been marked with dotted line 73', which surface is defined by the horizontal edge 73 of protrusion lib on the bell 11.

From Figure 1 it is apparent, that the upper portion 11a of the outlet bell extends upwards to a significant height above the water sur 73' of the drain trap. The muff with its upper end actually comes up to the circular upper portion, provided with grooves, of the main part I o the floor drain. Hereby the connection by means of the bell 11 can be d to a waste conduit located on a relatively small depth under the floor the room in question. In other words, the invention allows the arrangem of a waste water system with a floor drain in a floor construction of lesser thickness than what has been possible up to the present with conventional floor drains. As an example it can be observed, that the f drain according to the illustrated embodiment can be made to have a dep counted from the level of the point 21, of only 130 mm, the inner diame of the outlet bell being 75 mm.

The cupshaped part I of the floor drain is intended to be covered by a grid device, usually called a strainer, an embodiment of which according to the present invention is shown in Figures 3 and 4. The strainer, which similarly to the main part I is intended to be produced from thermoplastics, has a circular main shape and its outer surface fi into a corresponding inner surface of a ring according to Figures 5 and intended for clamping of a floor carpet, which is to be connected to th floor drain. The strainer II comprises a great number of radial ribs 101 retained close to the periphery of the strainer by means of a circular 103. From each rib 133 a lip 105 extends radially, which ends in a radial edge adjacent to and preferably immediately below the adjacent ri 101, where this and said lip 105 form therebetween a flexible slot for passage of waste water. The strainer is constructed to be able to be tre upon according to the building code. In the embodiment illustrated the strainer also has a vacuum valve 201, which will be described in detail further on.

In Figures 5 and 6 is shown a composite circular clamping ring III according to an embodiment of the invention, which ring is intended to sealingly clamp the circular edge portion, connected to the floor drain, of a floor carpet in the room, where the floor drain is to be arranged. The ring III consists of an inner part 121 and an outer part 123. The in part is radially engaged with the outer part and has a lower surface 125 intended to be appl ed towards and fastened to the horizontal wall 61 of the main part I of the floor drain or a support element placed thereunder The inner part 121 in addition has an outer cylindrical surface 127, the lower part of which is to be applied to a cylindrical surface 128 of the upper part of the drain to accurately centre the whole ring and the strainer II, an inner surface 129 to receive the strainer II as well as a outer flange 131 intended to retain vertically the outer annular part 123

The outer annular part 123 has an outer portion 132 with an outer conical surface 133 parallel to the conical surface 45 of the basic part of the floor drain and forming together with the latter surface a conical gap 135 to receive the circular marginal portion of a floor carpet, which is not shown and is connected to the floor drain, after this edge portion having been formed, e.g. by heating, for this purpose. The annular part 1 also has a first inner cylindrical surface 141 fitting around the cylindrical surface 127 of the annular part 121, a second inner cylindric surface 142, fitting around an outer cylindrical surface of the outer flange 131 of the inner part 121, and a surface connected to the surfaces 141 and 142, forming a number of sloping ramps 143 with a grooved upper side, distributed in the peripheral direction of the ring, which upper si also can be sloping inwards, e.g. 45°, towards the centre of the ring.

Towards the ramps 143 the lower side of the flange 133 of the inner annul part 121 is applied, which lower side is formed with ramps sloping in the opposite peripheral direction in regard to the ramps 143 and are shaped with a grooved surface in the same way as the surface 143 of the annular part 123. It is directly apparent from Figure 5, that a rotation therebetween of the annular parts 121 and 123 allows the adjustment of th width of the gap 135, which is intended for clamping the edge of the carpet, before the inner ring 121 is fixed to its support. Hereby an adjustment easily can be done to different carpet thicknesses. The adjustment is made in advance on a scale 151 on the outer annulart part 1 together with a mark 153 on the inner annulart part 123. The scale can fo instance be graded from 1.0 to 2.5 mm, one scale line being arranged for each tenth of a millimetre.

The attachement of the inner annular part 121 can be done by means of, for instance screws to the flat surface 61 of the main part, as has been mentioned earlier.

In Figure 9 is sectionally shown another design of a composite clamping ring III. This embodiment differs from the design of Figures 5 a 6 by the fact, that the outer circular part 123' has an upper surface 1 extending inwardly towards the centre of the floor drain and entirely extending over the inner part 121'. The outer part 123' has, partly, a inner surface 243 facing the centre of the floor drain and a second sur 245 directed from the centre of the floor drain, located on a greater distance from the centre of the floor drain and the mentioned, freely located inner surface 243. This second inner surface is applied to the outer surface 247 of the inner part 121. In addition the sloping ramp elements of the inner part 121 are arranged on the topmost part of this annular part which topmost part extends into a peripheral, downwardly directed notch, formed in the inner edge of the outer annular part 123'. This notch is at its bottom, which thus is directed upwards, provided wi sloping ramp elements corresponding to the ramp elements on the inner annular part 121'. As is indicated in the Figure, the outer annular part 123' can be screwed onto the plane surface 61 of the main part of the fl drain by means of screws 249.

This second composite clamping ring III functions in a similar way as the clamping ring in the first embodiment. A difference is however, that in this latter embodiment, the screws 249, if any, have to be place in the outer annular part 123'. A mark and an associated scale in additi may be arranged on the inner surfaces 243 and 251, respectively, of the outer and inner annular parts, which face the centre of the floor drain. Figure 7 shows the main part of a vacuum valve IV, with which the floor drain according to the embodiment shown is provided. The valve is supported by a circular cover 161, which sealingly is fitted into a corresponding seat 163 in the strainer II. The lid 161 carries, by means of downwards directed, suitably radial support means 165, a ring 167 wit smooth, horizontal top surface 169. At the lower portion of the strainer II there is a ring-shaped means 171 which, with a small gap, surrounds t ring 167 and has a smooth upper surface 175 at the same level as the upp surface 169 of the ring 167. A light flat ring 177, which is guided in t space 170, rests in its normal position on both ring-shaped surfaces 169 and 175 and hereby closes off the ring-shaped gap 173. The ring 167 is sealingly fitted into an opening 179 in the drain trap casing 75, the ring-shaped slit 173 being underneath in communication with the atmosphe If now subatmospheric pressure occurs in the outlet pipe, the atmospheri pressure in the ring-shaped gap 173 will lift the flat ring 177, whereby air will flow in and balance the negative pressure in the outlet conduit, and the drain trap will be kept intact in the shown floor drain and other floor drains and other installed devices with v/ater traps, which are connected to the same discharge pipe.

The opening 179 in the drain trap casing 75 will be made not until it has been decided that the floor drain in question should be provided with a vacuum valve.

According to Figure 2 the drain trap casing 75 has a depression 21 in the centre of the upper circular portion of the main part I of the floo drain. The depression matches with a pin 233 on a tool shown in Figure 8 for cutting of a round edge fitting to the floor drain, in the floor carpe which is to be connected to the floor drain. The tool comprises an arm 231 having the pin 233 at its one end and a head 235 at its other end with a notch 237, which is orthogonal to the arm. In the notch 237 a knife blade for carpet cutting is intended to be clamped. The tool with the knife blad can, after the pin 233 has been inserted into the recess 21 on the drain trap casing, be turned around by means of the thumb grip 239 for cutting the round edge of the floor carpet. The distance between the center of the pin 233 and the notch 237 for the knife blade is adjusted in such a way that the carpet edge being cut comes suitably far down into the gap 135 shown in Figure 6, where the margin of the carpet is clamped in the way described earlier. The described tool and the method according to the invention achieve a comfortable cutting and a cutting of the floor carpet, which is as accurate as possible, adapted to the floor drain.

The tool according to Fi-gure 8 has cuttings 241 along its arm 231, which have different widths, which suitably are marked on the arm, corresponding to the actual thicknesses of floor carpets. The cuttings provide a simple and always accessible aid for measuring the thickness of the floor carpet to be used. The measured thickness is adjusted on the scales 151 of the double ring according to Figure 5 before clamping of the cut carpet edge, as has been described with reference to Figure 5.

The invention is not limited to the shown and described enbodiment, since it can be modified in many ways within the scope of the invention. Some exa pleswill be noted here.

The upper portion of the floor drain main part does not have to comprise three circular flanges 31, 33, 35 as in the example but may have another design.

The floor drain according to the invention can also be manufactured without the inlet connection pieces 55, 57 and in such a case the distance between the point 21 and the outlet muff 11 can be made shorter, whereby the spillover 73 will be located higher, which means, that the drain can be made with a lesser depth correspondingly. The upper edge 81 of the bel can be located inside the area, which is surrounded by the tongues 31, 3 35.

Though the centre axes of the side inlets 55, 57 are located in th same vertical plane, which in addition also contains the upper centre poi 21 of the floor drain, which highly facilitates planning and measurement installing the floor drain and the pipes connected thereto, in certain cases another position of the side inlets may be suitable.

The strainer II can be made with a bottom pin, matching to the depression 21 of the drain trap casing 72, and may hereby retain this casing, if the strainer is anchored e.g. by means of screws.

The strainer does not have to be provided with a vacuum valve. The clamping of the edge of the floor carpet connected to the floor carpet do not have to be made by means of a double ring of the type shown but can b made in another way. The embodiment shown and described, however, forms a good total solution of most of the problems occurring in installing floor drains and pipings connected thereto, and in addition provides new possibilities of installing waste pipes with a floor drain, where the spa for this in different ways is restricted, at the same time as it allows f reduction of certain dimensions of the surrounding construction elements, particularly the floor structure.

A very advantageous feature of the floor drain according to the invention is its ability that it may without a significant loss of water the water trap, bear such short positive and negative pressures in the waste waterpipes, which sometimes occur in normal waste water systems. In this regard the floor drain according to invention is advantageous compar to floor drains of a conventional design. From what has been stated above it is apparent, that several of the different details of the described floor drain can be used separately. Thus, the particular shape of the drain trap casing 75, does not presuppo that the outlet bell is arranged in a way shown, even if this is the preferred embodiment. The clamping ring III and the vacuum valve IV can also be used on other floor drains. The same thing is true for the arrangement of a centre bore 21 or another guiding means, such as a centr pin, and an associated cutting tool, which is applicable to most other types of floor drains.

Claims

Cl aims

1. A floor drain comprising a cupshaped main part (I), adapted to receive waste water and to form a drain trap, having an upper edge portio to be connected to a corresponding opening in the floor, where said floor drain is to be placed, and a pipe connection piece (11), to which a waste conduit extending from said floor drain is intended to be connected, said pipe connection piece (11) being shaped as a straight pipe portion connected to said waste conduit, the longitudinal axis of said straight pipe portion forming, with the horizontal plane, an angle 0. substantial greater than 0° and substantially less than 90°, said straight pipe portion with its highest located part extending to a level located above the water surface (73') of said drain trap, this highest located part bei formed by an end of said pipe connection piece (11) extending up to the level of that upper portion of the main part (I) of said floor drain, whi is intended to be received in the opening in the floor, where said floor drain is to be placed, and a portion of said straight pipe portion defini the level of the water surface (73') of said drain trap, characterized in that the inlet end of said straight pipe portion (11) has a profile (71, 73) formed in such a way, that the generatrices of said straight pipe portion (11) extend at least up to the plane, which is orthogonal to the axis (13) of said straight pipe portion (11) and which passes through the highest point of said straight pipe portion (11).

2. A floor drain according to claim 1, characterized in that at lea the upper part (71) of the inlet end of said straight pipe portion (11) i straightly cut off.

3. A floor drain according to claim 2, characterized in that said straightly cut off part (71) is cut off orthogonally to the axis (13) of said straight pipe portion (11).

4. A floor drain according to one of the preceding claims, characterized in that that part of said straight pipe portion (11), which defines the level of the water surface (73') of said drain trap, is forme by the straight pipe portion (11) being partly cut off along a horizontal line, whereby a protrusion (lib) with a horizontal edge (73) on the lower part of said straight pipe portion (11) is obtained.

5. A floor drain according to one of the preceding claims, characterized in that said pipe connection (11) is made as a straight bel adapted to sealingly enclose the connector part of said waste conduit .211-219).

6. A floor drain according to one of the preceding claims, characterized in said the angle<c( is 45°

7. A floor drain according to one of the preceding claims, characterized in that it comprises a casing (75), located inside the ma part (I) and extending from the upper end of said bell (11) to the neighbourhood of the lower end of said straight pipe portion and being in approximately 135°, to form a drain trap together with said protrusi (lib) on said straight pipe portion (11).

8. A floor drain according to claim 7, wherein said main part (I) comprises a front wall (1), which is connected to said straight pipe portion (11), a rear wall (3) and two end walls (5, 7) opposite to each other, characterized in that said casing (75) is sealingly connected to least both end walls (5, 7).

9. A floor drain according to one of claims 5 - 8, characterized i that said dischage bell (11) at its outlet end has a radially enlarged

(19) for receiving at least a substantial part of the inner bent portio a pipe end (211 - 219) connected to said bell.

10. A floor drain comprising a cupshaped main part (I), adapted to receive waste waterand to form a drain trap, having an upper edge portio to be connected to a corresponding opening in the floor, where said floo drain is to be placed, and a pipe connection (11), to which a waste cond (211 - 219), extending from said floor drain, is intended to be connecte said pipe connection piece (11) being shaped as a straigh pipe portion connected to said waste conduit, and said main part (I) having an upper circular portion (9), intended to be connected to a corresponding openin in the floor, where said drain will be placed, characterized in that the outer main contour of said upper circular portion is tapering conically downwards with a cone angle preferably having a value of and not exceedi approximately 45° and that said pipe connection piece (11) with a vertical plane forms an angle, at least being equal to said cone angle.

11. A floor drain according to claim 10, characterized in the cent axis of said straight pipe portion (11) passes through the uppermost cen point (21) of said upper circular portion (9).

12. A floor drain according to one of claims 10 - 11, characterize in that the generatrices of those side surfaces (5, 7) of the cupshaped main part (I) of said floor drain, which are not directly connected to s outlet connection piece, are parallel to the centre axis (13) of said connection pipe (11).

13. A floor drain according to one of claims 10- 12, characterized that said circular portion is formed with circular ridges (31, 35) at its outer side.

14. A floor drain comprising a cupshaped main part (I), adapted to receive waste water and to form a drain trap, having an upper edge portio to be connected to a correspond ng opening in the floor, where said floo drain is to be placed, and a pipe connection piece (11), to which a waste conduit (211 - 219), extending from said floor drain, is intended to be connected, said main part (I) having an upper circular portion (9) intend to be connected to a corresponding opening in that floor, where said drai is to be placed, and said floor drain comprising a ring (III) for fasteni of a circul r edge portion of a floor carpet, which is to be connected to said floor drain, characterized in that said ring (III) comprises an oute circular part (123) having an outer portion (132) for clamping of said e portion, and a circular inner part (121), matching into said outerpart, fixing of said outer part (123) there being arranged ramps (143) cooperating with each other, on said outer and inner parts, in order to retain said outer part, depending on the rotational position of said pa (121, 123) in relation to each other, in the desired vertical position, adjusted to the thickness of said floor carpet.

15. A floor drain according to claim 14, characterized in that one said annular parts (121, 123) is provided with a mark (153) cooperating with a scale (151) located on the other part, on which scale the vertical position of said outer part (123) can be read, when the vertical positio is adjusted by a rotation of said annular parts (121, 123) in relation t each other.

16. A floor drain comprising a cupshaped main part (I), adapted to receive waste water and to form a drain trap, having an upper edge portio to be connected to a corresponding opening in the floor, where said floo drain is to be placed, and a pipe connection piece (11), to which a wast conduit (211 -219), extending from said floor drain, is intended to be connected, and a strainer (II) covering said main- part (I), characterize in that a vacuum valve (IV) is arranged in said strainer (II).

17. A floor drain according to claim 16, characterized in that the valve effect of said vacuum valve (LV) is achieved by the fact that a light, ring-shaped valve element (177) is lifted up from ring-shaped formed, valve seats (169, 175) by subatmospheric pressures occuring in s waste conduit (211 - 219).

18. A floor drain according to one of claims 16 - 17, characteriz in that said vacuum valve (IV)comprises a ring (167), which is carried the lid (161) of said vacuum valve (IV), is sealed against an opening ( to the drain trap and the upper edge of which forms a valve seat (169) the valve element (177).

19. A floor drain according to one of claims 16 - 18, characteriz in that another valve seat (175) for the vacuum valve (IV) is formed by ring-shaped surface formed in the side of the hole in the strainer (II) receiving said vacuum valve (IV).

20. A floor drain comprising a cup shaped main part (I), adapted receive waste water and to form a drain trap, having an upper edge porti to be connected to a corresponding opening in the floor, where said flo drain is to be placed, and a pipe connection piece (11), to which a was conduit (211 - 219), extending from said floor drain, is intended to be connected, characterized in that a centre means (21) is&rranged at the centre of the upper circular portion (9) of said floor drain to cooperat with a cutting tool, which is rotatable around said centre means (21).