Wasserklosett

Abstract

Water closet with a bowl (1) and a rinsing water supply (5, 6) which ends in an inlet opening (7) into the bowl, wherein the bowl's inner shape (1) has a first vertical mid-plane (M1), wherein the vertical mid-plane (M1) is, in ordinary installation in front of a straight wall, perpendicular to this mounting wall and, in the installed state of the toilet, conceptually divides a water drain and a user sitting on the toilet in the middle, i.e., is perpendicular to a second vertical mid-plane (M2) which divides the toilet into a front and a rear area, wherein a purely top-side supply of rinsing water into the bowl is provided, i.e. without an inlet opening below a third horizontal median plane (M3) of the bowl shape with respect to its total height including the siphon, i.e. a median plane (M3) running horizontally and otherwise through the center of the entire vertical extent of the bowl's inner shape including the siphon, and exactly one inlet opening (7) is provided above the third median plane (M3) of the bowl's inner shape, wherein the rinsing water supply (5, 6) and the inlet opening (7) are designed such that the rinsing water flows into the bowl (1) with a predominantly tangential velocity component with respect to the bowl's inner shape and undergoes a rotating motion in the bowl (1), wherein the bowl's inner shape has no rim, i.e. no circumferential channel for rinsing water with downward-facing inlet openings for the flow of rinsing water into the bowl (1), characterized by that the bowl's internal shape (1) has an asymmetrical form with respect to the first vertical median plane (M1), even apart from any flushing water inlet openings, such that the bowl's internal shape defines a flow path for the flushing water between an outer concave edge (8) and an inner convex edge (9), with respect to vertical sections through the bowl's internal shape to the center of a water level (WS) in a siphon of the bowl (1), which flow path is continuous with respect to the vertical sections and is inclined relatively shallowly inwards in relation to the rest of the bowl's internal shape and thereby descends monotonically around the water level (WS) and is thus lower on one side of the median plane (M1) than on the other and thus superimposes a bowl-shaped downward movement on the rotating flushing water movement,The bowl's inner shape also adds a downward vertical movement component. and by the fact that the water closet has a static siphon (2).

Description

[0001] Regarding European patent EP 2 604 761 (DE 50 2011 005 882), the 6th Senate (Voidance Senate) of the Federal Patent Court, based on the oral proceedings of 10 May 2023, has decided recognized as rightful: I. European patent 2 604 761 is partially declared invalid with effect for the territory of the Federal Republic of Germany by amending its claims to the following wording:

Claims

[1] Water closet with a bowl (1) and a rinsing water supply (5, 6) which ends in an inlet opening (7) into the bowl, wherein the bowl's inner shape (1) has a first vertical mid-plane (M1), wherein the vertical mid-plane (M1) is, in ordinary installation in front of a straight wall, perpendicular to this mounting wall and, in the installed state of the toilet, conceptually divides a water drain and a user sitting on the toilet in the middle, i.e., is perpendicular to a second vertical mid-plane (M2) which divides the toilet into a front and a rear area, wherein a purely top-side supply of rinsing water into the bowl is provided, i.e. without an inlet opening below a third horizontal median plane (M3) of the bowl shape with respect to its total height including the siphon, i.e. a median plane (M3) running horizontally and otherwise through the center of the entire vertical extent of the bowl's inner shape including the siphon, and exactly one inlet opening (7) is provided above the third median plane (M3) of the bowl's inner shape, wherein the rinsing water supply (5, 6) and the inlet opening (7) are designed such that the rinsing water flows into the bowl (1) with a predominantly tangential velocity component with respect to the bowl's inner shape and undergoes a rotating motion in the bowl (1), wherein the bowl's inner shape has no rim, i.e. no circumferential channel for rinsing water with downward-facing inlet openings for the flow of rinsing water into the bowl (1), characterized by , that the bowl's internal shape (1) has an asymmetrical form with respect to the first vertical median plane (M1), even apart from any flushing water inlet openings, such that the bowl's internal shape defines a flow path for the flushing water between an outer concave edge (8) and an inner convex edge (9), with respect to vertical sections through the bowl's internal shape to the center of a water level (WS) in a siphon of the bowl (1), which flow path is continuous with respect to the vertical sections and is inclined relatively shallowly inwards in relation to the rest of the bowl's internal shape and thereby descends monotonically around the water level (WS) and is thus lower on one side of the median plane (M1) than on the other and thus superimposes a bowl-shaped downward movement on the rotating flushing water movement,The bowl's inner shape also adds a downward vertical movement component. and by the fact that the water closet has a static siphon (2). [2] Water closet with a bowl (1) and a rinsing water supply (5, 6) which ends in an inlet opening (7) into the bowl, wherein the bowl's inner shape (1) has a first vertical mid-plane (M1), wherein the vertical mid-plane (M1) is, in ordinary installation in front of a straight wall, perpendicular to this mounting wall and, in the installed state of the toilet, conceptually divides a water drain and a user sitting on the toilet in the middle, i.e., is perpendicular to a second vertical mid-plane (M2) which divides the toilet into a front and a rear area, wherein the rinse water supply (5, 6) and the inlet opening (7) are designed such that the rinse water flows into the bowl (1) with a predominantly tangential velocity component with respect to the bowl's inner shape and undergoes a rotating motion in the bowl (1), wherein the bowl's inner shape has no rim, i.e. no circumferential channel for rinsing water with downward-facing inlet openings for the flow of rinsing water into the bowl (1), characterized by , that the bowl's internal shape (1) has an asymmetrical form with respect to the first vertical median plane (M1), even apart from any flushing water inlet openings, such that the bowl's internal shape defines a flow path for the flushing water between an outer concave edge (8) and an inner convex edge (9), with respect to vertical sections through the bowl's internal shape to the center of a water level (WS) in a siphon of the bowl (1), which flow path lies lower on one side of the median plane (M1) than on the other and thus superimposes a downward movement due to the bowl's internal shape on the rotating flushing water movement, thus also adding a downward vertical movement component through the bowl's internal shape, wherein the bowl's internal shape has an asymmetrical form with respect to the first vertical median plane (M1), even apart from any flushing water inlet openings, if present.that the flow path on the side of the intermediate plane (M1) where the flow path lies deeper is on average steeper than on the other side. [3] Water closet according to one of the preceding claims, wherein the inlet opening is located behind the second intermediate plane (M2). [4] Water closet according to one of the preceding claims, wherein the flushing is designed to be purely gravimetric, i.e. without an internal flushing water supply pump. [5] Water closet according to claim 2, optionally in combination with claim 3 or 4, with a static siphon (2). [6] Water closet according to claim 2, optionally also in combination with one of claims 3 to 5 with a purely top-side supply of flushing water into the bowl, i.e. without an inlet opening below a third horizontal median plane (M3) of the bowl's inner shape in relation to its total height including the siphon, i.e. a median plane (M3) running horizontally and otherwise through the center of the entire vertical extent of the bowl's inner shape including the siphon. [7] Water closet according to claim 6 having exactly one inlet opening (7) above the third intermediate level (M3) of the bowl's inner shape. [8] Water closet according to claim 1, optionally also in combination with one of claims 3 to 5, wherein the bowl interior shape has an asymmetrical shape with respect to the first vertical median plane (M1), apart from flush water inflow openings, if any, such that the flow path on the side of the median plane (M1) where the flow path is lower is on average steeper than on the other side. [9] Water closet according to one of the preceding claims with an inlet opening (7) for flushing water having a height of at least 5 cm. [10] Water closet according to one of the preceding claims, wherein a WC-internal part of the flushing water supply (5, 6) extends along its extent to the inlet opening (7) and this also has a flow cross-section of at least 5 cm² 2 exhibit. [11] Water closet according to one of the preceding claims, wherein a center line (M4) of a WC-internal part of the flushing water supply (5, 6) along its extension to the inlet opening (7) has radii of curvature of at least 1 cm. [12] Water closet according to one of the preceding claims, wherein the flow path of the bowl's inner shape is bounded to the outside by a concave edge (8) which, after one revolution around the siphon water level (WS), meets approximately the lower end of the inlet opening (7) of the flushing water. [13] Use of a water closet according to one of the preceding claims for flushing, wherein the flushing water has a rotating movement around the siphon water level (WS) starting from the inlet opening (7) of the flushing water with a helically downward-sloping component. [14] Use according to claim 13, wherein the amount of rinse water in a rinsing process is at most 6 liters. [15] Use of a water closet according to one of claims 1 to 2 in combination with a cistern, in particular a concealed cistern, also in combination with the use according to claim 13 or 14. [16] WC system comprising a water closet according to one of the preceding claims and a cistern, preferably a concealed cistern designed for a flushing water quantity limited to a maximum of 6 l.