Drain sieve for a washbasin

Abstract

A drain sieve for a washbasin catches foreign objects with a specified minimum size. The drain sieve has an annular support surface to be supported on the washbasin in the region of a drain of the washbasin and a closed curved surface which lies below the support surface in the assembled state. A distance between the curved surface and the support surface depends on the size of the foreign bodies to be caught, and the drain sieve is configured such that the curved surface of the drain sieve is curved upwards in the assembled state. Openings for the outflow of the water are arranged between the outer lower edge of the curved surface and the support surface of the drain sieve.

Claims

1. A drain sieve, comprising: a curved surface for a washbasin for catching foreign bodies of a predefined minimum size; a bearing surface for abutment on the washbasin in a region of a drain of the washbasin, said bearing surface being delimited by at least one edge facing said curved surface, said bearing surface opening into the drain of the washbasin at least in part for a passage of water, the drain sieve being realized in such a manner that said curved surface containing an edge delimiting the curved surface and said curved surface, at least at one point, is at a predefined distance greater than zero from said edge of said bearing surface, the predefined distance between said edge of said curved surface and the edge of said bearing surface is dependent on the predefined minimum size of the foreign bodies which are to be caught by the drain sieve; and said curved surface being curved toward said bearing surface.

2. The drain sieve according to claim 1, wherein said bearing surface is ring-shaped bearing surface.

3. The drain sieve according to claim 2, wherein the drain sieve is realized in such a manner that said edge of said curved surface and said edge of said ring-shaped bearing surface are realized so as to be aligned.

4. The drain sieve according to claim 1, wherein: said curved surface and said bearing surface are connected together; and the drain sieve has at least one opening formed therein for the passage of the water between said curved surface and said bearing surface.

5. The drain sieve according to claim 4, further comprising webs, said curved surface and said bearing surface are connected together by means of said webs which are spaced apart from one another.

6. The drain sieve according to claim 1, wherein said curved surface is free of openings for the passage of the water.

7. The drain sieve according to claim 1, wherein said curved surface assumes a form of a part of a surface of an ellipsoid.

8. The washbasin according to claim 7, wherein said curved surface of said drain sieve has an inclination, said drain sieve is disposed in such a manner that the inclination of said curved surface of said drain sieve points away from a predefined position of a user of the washbasin.

9. The drain sieve according to claim 1, wherein said curved surface assumes a form of part of a surface of a sphere.

10. The drain sieve according to claim 1, wherein the predefined distance between said edge of said curved surface and said bearing surface is no more than 7 mm.

11. A washbasin, comprising: a drain; and a drain sieve, containing: a curved surface for catching foreign bodies of a predefined minimum size; a bearing surface disposed in a region of said drain, said bearing surface being delimited by at least one edge facing said curved surface, said bearing surface opening into said drain at least in part for a passage of water, said drain sieve being realized in such a manner that said curved surface containing an edge delimiting said curved surface and said curved surface, at least at one point, is at a predefined distance greater than zero from said edge of said bearing surface, the predefined distance between said edge of said curved surface and said edge of said bearing surface is dependent on the predefined minimum size of the foreign bodies which are to be caught by said drain sieve; and said curved surface being curved toward said bearing surface.

12. The washbasin according to claim 11, wherein said curved surface of said drain sieve is disposed entirely in said drain.

13. The washbasin according to claim 11, wherein said drain sieve is disposed in such a manner in said drain that said edge of said curved surface of said drain sieve is at a defined distance greater than zero from said drain in a horizontal direction.

14. The washbasin according to claim 13, wherein the predefined distance between said edge of said curved surface of said drain sieve and said drain is no more than 7 mm.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) FIG. 1 shows a perspective representation of a washbasin with a drain sieve of the prior art,

(2) FIG. 2 shows an exploded representation of the washbasin from FIG. 1,

(3) FIG. 3 shows a sectional representation of the washbasin from FIG. 1 in an installed situation,

(4) FIG. 4 shows a perspective representation of a further embodiment of a washbasin with a drain sieve of the prior art,

(5) FIG. 5 shows the drain sieve from FIG. 4 from the side,

(6) FIG. 6 shows a perspective representation of an embodiment of a drain sieve according to the invention,

(7) FIG. 7 shows the drain sieve from FIG. 6 from the side,

(8) FIG. 8 shows a sectional representation of the drain sieve according to the invention from FIG. 6 in an installed situation in a washbasin,

(9) FIG. 9 shows a perspective representation of a washbasin with a drain sieve according to the invention from FIG. 6,

(10) FIG. 10 shows an exploded representation of the washbasin from FIG. 9,

(11) FIG. 11 shows a perspective representation of a further embodiment of a drain sieve according to the invention,

(12) FIG. 12 shows a sectional representation of the drain sieve from FIG. 11,

(13) FIG. 13 shows a perspective representation of a washbasin with the drain sieve according to the invention from FIG. 11,

(14) FIG. 14 shows a sectional representation of the drain sieve according to the invention from FIG. 11 in an installed situation in a washbasin.

DESCRIPTION OF THE INVENTION

(15) FIGS. 1 to 3 show a washbasin of the prior artFIG. 1 in a three-dimensional view, FIG. 2 in an exploded representation to illustrate the individual components and FIG. 3 in a sectional representation. Said washbasin comprises a drain opening to which the drain connects in a direct manner.

(16) In its installed position or position of use, the washbasin 1 comprises a drain opening at the lowest point of the washbasin 1 with a vertical opening axis. The drain opening is covered by means of a drain sieve 2. The drain sieve 2, however, comprises a plurality of openings 8 for the passage of water such that water is able to be discharged through the drain opening of the washbasin through the openings 8 in the drain sieve 2.

(17) An outflow, here in the form of a drain pipe 9, is connected to the drain opening. The washbasin 1 illustrated here comprises a circumferential projection 10, on which the drain sieve 2 rests. The drain sieve 2 further includes a bearing surface for abutment on the projection 10 of the washbasin 1 in the region of the drain opening. This serves for inserting the drain sieve 2 into the washbasin and for supporting the drain sieve 2 on the washbasin 10. The drain opening of the washbasin 1 is delimited by the projection 10. A first seal 11, which is pre-stressed against the washbasin 1 by means of a drain sink 15, is arranged below the projection 10. The drain sink 15, in turn, is screw-connected to the drain sieve 2 by means of a fastening screw 14 and they are pre-stressed against one another. The fastening screw 14 coincides here with the vertical opening axis of the drain opening.

(18) A seal 12, which is pre-stressed by means of a nut 13, is provided once again between the drain pipe 9 and the drain sink 15. For this purpose, the nut 13 encompasses a collar of the drain pipe 9 and comprises an internal thread which is screw-connected to an external thread of the drain sink 15.

(19) Analogously to the embodiment according to FIGS. 1 to 3, FIGS. 4 and 5 show washbasins of the prior art. In contrast, the drain sieve 2 here, however, comprises a closed spherical cap. The spherical cap 16 is free of openings for the passage of water. The drain sieve 2 is divided into two parts. It includes the already mentioned spherical cap 16 and a lower part 17 which rests with the projection of the washbasin 1 and onto which the spherical cap 16 is fitted. The lower part comprises a bearing surface 4 and webs 6. The bearing surface 4 serves for the abutment of the drain sieve 2 on the projection of the washbasin 1 in the region of the drain opening. The bearing surface 4 is realized in a ring-shaped manner with a central opening for the passage of water. Said opening opens the drain opening of the washbasin 1 at least in part. A single web, which is not shown and, in turn, comprises an opening for passing through a fastening screw 14, is provided bridging the central opening. The webs 6 connect the bearing surface 4 to the spherical cap 16 which is fitted onto the webs 6 or onto a ring which connects the webs 6 and is not shown. The fastening screw 14 with the spherical cap 16 removed is thus also screw-connectable in the same way as in the preceding embodiment. Once this has been mounted successfully, the spherical cap 16 can be fitted. Passage of water through the drain opening is ensured by the distance between the outer edge of the spherical cap 16 and the washbasin 1 which is predetermined by the length of the webs 6.

(20) FIGS. 6 and 7 then show a drain sieve 2 according to the invention for a washbasin for catching foreign bodies of a predefined minimum size with a curved surface 3. The drain sieve 2 comprises a bearing surface 4 for abutment on the washbasin in the region of a drain of the washbasin, the bearing surface 4 opening the drain of the washbasin at least in part for the passage of water. According to the invention, this is achieved as a result of the drain sieve 2 being further realized in such a manner that the curved surface 3 comprises an edge 5 which is at a predefined distance greater than zero from the bearing surface 4 of the drain sieve 2. Webs 6 are provided on the edge 5 here and the curved surface 3 is connected to the bearing surface 4 by means of said webs. The curved surface 3 of the drain sieve 2 is curved according to the invention from the edge 5 and toward the bearing surface 4 of the drain sieve 2. In this exemplary embodiment, it is realized in a ring-shaped manner with an inner edge 7 which delimits a central opening for the passage of water. The edge 5 of the curved surface 3 and the inner edge 7 of the ring-shaped bearing surface 4 are arranged in alignment with one another. The lengths of the webs 6, which are uniform here, fix the distance from the bearing surface 4 of the drain sieve. The webs 6 are arranged evenly distributed over the circumference of the curved surface 3. Water is able to drain between the webs 6 into the drain of the washbasin.

(21) The drain sieve 2 is realized in such a manner that the curved surface 3 of the drain sieve 2 is convex toward the bearing surface 4 of the drain sieve 2. The convexly curved surface 3 is free of openings or holes for the passage of liquid out of the washbasin. It comprises a central bore 18 for passing through a simply fastening screw. Otherwise, it has the form of a spherical cap.

(22) FIGS. 8 and 9 show the drain sieve 2 from FIGS. 6 and 7 in an installed position in the washbasin 1.

(23) In its installed position or position of use, the washbasin 1 comprises a drain opening at the lowest point of the washbasin 1 with a vertical opening axis. The drain sieve 2 is inserted into the drain opening. The washbasin 1 illustrated here comprises, in the region of the drain opening, a circumferential projection 10 which connects to an inner surface of the washbasin 1, on which inner surface the drain sieve 2 rests by way of its ring-shaped bearing surface 4. The circumferential projection 10 delimits the drain opening and the bottom of the washbasin at the lowest point.

(24) The curved surface 3 of the drain sieve 2 is curved convexly toward the bearing surface 4 and is introduced into the drain of the washbasin 1. It curves outwardly or upwardly toward the user of the washbasin 1 and consequently into the washbasin 1.

(25) By way of arrows, FIG. 8 shows a schematic sketch of the course of water from a water faucet arranged above the washbasin 1. The water passes through the central opening of the drain sieve, which central opening is delimited by the ring-shaped bearing surface 4, and consequently also through the drain opening of the washbasin 1 and impacts on the curved surface 3 of the drain sieve 2. As a result, the water is deflected to the side toward the outlet sink 15 and not in the direction of the user. The water then drains downward in the direction of the drain pipe 9 through the openings between the webs 6 of the drain sieve and between an inner surface of the outlet sink 15 and the edge 5 of the curved surface 3 of the drain sieve 2. The deflecting and the outflow of the water through the openings between the webs 6 of the drain sieve 2 can be effected, in principle, radially in all directions in the plane perpendicular to the opening axis of the drain opening. How the draining is actually effected depends on the point of impact of the water on the curved surface.

(26) FIG. 10 shows an exploded drawing analogous to FIG. 2 with the drain sieve according to the invention according to FIGS. 6 and 7 and further components. It is possible to see: drain pipe 9 seal 11, seal 12, nut 13, fastening screw 14, outlet sink 15, drain opening 19 of the washbasin 1.

(27) The mounting of the drain sieve 2 with the washbasin and the drain pipe 9 is effected in an identical manner to the prior art.

(28) Here too, the drain sieve 2 is inserted into the drain opening 19 of the washbasin 1. As known in the prior art, the outlet sink 15 is screw-connected to the drain sieve 2 by means of the fastening screw 14 and both components are pre-stressed against one another by interposing the seal 11. The fastening screw 14 coincides here with the vertical opening axis of the drain opening.

(29) A further seal 12, which is pre-stressed by means of the nut 13, is provided between the drain pipe 9 and the outlet sink 15. The nut 13 encompasses a collar of the drain pipe 9 for this purpose and comprises an internal thread which is screw-connected to an external thread of the outlet sink 15.

(30) The outlet sink 15 as part of the drain connects to the bottom of the washbasin 1 below the bottom of the washbasin. The drain pipe 9 connects, in turn, to the outlet sink 15.

(31) FIGS. 11 to 14 illustrate various views of a further embodiment of a drain sieve according to the invention.

(32) The curved surface 3 of the drain sieve 2 no longer comprises a through-bore for passing through a fastening screw 14. It is free of openings or holes. A blind hole 18 is provided instead.

(33) Here too, the bearing surface 4 opens the drain of the washbasin at least in part for the passage of water out of the washbasin. To this end, the bearing surface 4, as known from the above designs, comprises an opening for the passage of water. The bearing surface 4 serves for abutment on the washbasin 1, opening the drain at least in part for the passage of water. It extends in a ring-shaped manner about the drain whilst abutting on the washbasin 1.

(34) A further essential difference to the aforenamed embodiments is that the curved surface 3 is inclined on one side and no longer falls away radially in the form of a spherical cap starting from a center point in the direction of its edge 5.

(35) The curved surface 3 extends in part above the bearing surface 4. Its edge extends at least at one point in alignment with the upper side of the bearing ring, the underside of which forms the bearing surface 4. The curved surface 3 falls away from there.

(36) Nevertheless, the upwardly convex, curved surface 3 of the drain sieve 2 and the bearing surface 4 are now connected together, here once again by means of webs 6, in such a manner that the free edge 5 of the upwardly convex, curved surface 3 of the drain sieve 2 and the bearing surface 4 are at a predefined distance and do not fall below this, openings for the passage of water, here once again between the webs 6 which delimit them with respect to the opening for the passage of water, being realized between the upwardly convex surface 3, in particular its free edge 5, and the bearing surface 4. The majority of the curved surface 3, however, is once again arranged in the drain of the washbasin 1 below the drain opening.

(37) The drain sieve 2, in this case, is arranged in the washbasin such that the inclination of the curved surface 3 of the drain sieve 3 points away from a predefined position of a user of the washbasin 1 such that water impacting onto the curved surface is deflected away from the user, as indicated by way of arrows in FIG. 13.

(38) The further water course is shown in FIG. 14.

(39) The water passes through the central opening of the drain sieve 2, which is delimited by the ring-shaped bearing surface 4, and consequently also through the drain opening of the washbasin 1 and impacts onto the curved surface 3 of the drain sieve 2. As a result, the water is deflected on one side toward the side of the outlet sink 15 and from a position of the user in front of the washbasin. The water then drains downward in the direction of the drain pipe 9 through the openings between the webs 6 of the drain sieve 2 and between an inner surface of the outlet sink 15 and the edge 5 of the curved surface 3 of the drain sieve 2. The deflecting and the draining of the water through the openings between the webs 6 of the drain sieve 2 can be effected, in principle, only in the directions of the inclinations of the curved surface 3 in the plane perpendicular to the opening axis of the drain opening. How the draining is actually effected depends on the point of impact of the water on the curved surface.