Abstract: To the housing part of a backflow-preventer for a sanitary device there is fastened an outer sleeve, made from elastomeric material, exhibiting a sleeve section which is distanced from the housing part. The outer sleeve embraces an inner sleeve which is fixedly supported to the housing and includes a supporting section, which is dimensioned such that the inner sleeve, when acted on by water flowing in the direction of flow, cannot fold inward. The sleeve section bears, under pretensioning, against the supporting section and is expanded by the pressure of the water so as to clear an opening between the sleeve section and the inner sleeve. If the water current is interrupted, the outer sleeve immediately bears again against the inner sleeve. The end sections of the inner and outer sleeves are configured like a sealing lip. The backflow-preventer prevents water from flowing back, even under the least underpressure on the feed side. Moreover, it is not sensitive to foreign bodies.

Abstract: In a valve space surrounded by a housing is arranged a sleeve-shaped valve body made of elastomeric material. The valve body is fastened with a fastening end thereof to the housing, and a flow channel thereof is flow-connected to an inlet orifice. The valve body bears, with a middle portion of the valve body spanning a ventilation orifice, on a ventilation-valve seat formed on the housing. There adjoins the middle portion a bead which the end portion, bearing under prestressing on the valve-seat element, adjoins on the other hand. With water flowing in the direction of flow and also with an equal pressure prevailing on the inlet side and outlet side, the valve body bearing on the ventilation-valve seat prevents the outflow of water through the ventilation orifice. With a negative pressure prevailing on the feed side, the middle portion lifts off from the ventilation-valve seat, in order to ventilate the outlet orifice.

Abstract: A plumbing system is provided with a coupling having a chamber, an inlet passageway through which a fluid may enter the chamber from a supply, an outlet passageway through which a fluid may exit the chamber and the coupling, and a vent passageway in fluid communication with the chamber and having a vent inlet in communication with ambient atmosphere and a vent outlet in communication with the chamber. The coupling is provided between a source of liquid (e.g. a control capsule for mixing hot and cold water supplies via a user operable valve) and an outlet nozzle (e.g., a hose-connected spray head). A vacuum breaker check valve is located in the vent passageway of the coupling and includes a valve member for closing the vent inlet when pressure in the chamber is greater than pressure at the vent inlet and for opening the vent inlet when pressure in the chamber is less than pressure at the vent inlet.

Abstract: A first automatic valve of a safeguard is connected in the flow path of a sanitary fitting. The diaphragm, acting as the valve body of a second valve, interacts with the valve seat and the first valve is arranged on said diaphragm. Under normal operating conditions, the second valve is closed and the first valve is opened. Under conditions allowing backflow counter to the direction of the arrow S, the first valve closes automatically, by which action the diaphragm is deformed counter to the direction of the arrow S due to the suction on the input side, which results in the second valve being inevitably opened. By this construction, water is prevented from flowing back into the feedline and the outlet is connected to the ambient air through the opened second valve and the aeration path.

Abstract: The fitting has in each case a hydraulically operable shutoff valve (40, 42) for hot and cold water. The diaphragm-shaped closure part (56) interacts with the valve seat (52). Provided on the side opposite the valve seat (52) is a pilot control space (60) which is connected through the passage (62) to the annular channel (48) and the corresponding feedline (20). Via control lines (86'), each pilot control space (60) is connected to the outlet line (24) via an auxiliary valve (70'). The two auxiliary valves (70') are constructed on a ceramic disk valve (72) and can be operated jointly. When the auxiliary valves (70, 70') are closed, the pressure in the pilot control space (60) corresponds to the pressure in the annular channel (48), the shutoff valves (40, 42) are closed. By rotating the operating shaft (86) the two auxiliary valves (70') are opened, by which means the pressure in the pilot control spaces (60) drops.

Abstract: The mixing fitting (10) has a shutoff valve (22) for hot water and a shutoff valve (24) for cold water. These shutoff valves (22, 24) are constructed as diaphragm valves and each have an auxiliary valve (62, 62') provided in the pilot control space (50). To operate these auxiliary valves (62, 62'), permanent magnets (76) are provided which can be swivelled about the axle (80') into and out of the range of action on the closure elements (64) of the auxiliary valves (62, 62'). To open the shutoff valves (22, 24), the swivel body (78) is swivelled by means of the drive (94) with the permanent magnets (76) into the region of the closure elements (64), by which means the latter are pulled toward the permanent magnets (76) with the auxiliary valve (62, 62') opening. The pressure in the pilot control space (50) drops and the shutoff valve (22, 24) is opened by the closure part (44) being lifted from the valve seat (40).

Abstract: The fitting has a valve (18) for cold water and a valve for (sic) (20) for hot water. Arranged fixedly on the closure part (38) interacting with the valve seat (42) is the auxiliary valve seat (56) of the relevant auxiliary valve (52, 54). The closure element (58) can be displaced in the direction of the axis (30) from the idle position shown into the desired limiting position by displacement of the control pin (82) in the direction of the axis (78') and by rotation of the same about the axis (78'). The auxiliary valves (52, 54) are thereby opened which leads to a pressure drop in the pilot control space (40). The closure parts (38) are lifted from the valve seats (42), by which means the water can flow from the inlet (22, 22') into the outlet (48, 48'). When the valve (18, 29) is opened, the gap between the O-ring (66) and the auxiliary valve seat (56) thus becomes smaller. This results in a pressure balancing occurring between the pilot control space (40) and the other side of the closure part (38).

Abstract: A sanitary fitting includes a fitting housing which has a fixed housing part which is overlapped by a jacket element which can be swivelled about an axis. Projecting toward the front from the jacket element is a nozzle in which a guide bush is inserted. Together with the inner wall of the nozzle, the guide bush bounds a jacket space which is connected to the surroundings by a passage. Furthermore, the jacket space is communicated by an aeration passage to an annular channel which is communicated by an aeration line to an aeration aperture of a safeguard mechanism. Water fed through a feed line is mixed in a control cartridge and flows through the safeguard mechanism, connected downstream from the control cartridge, and through a pipe into a hose to a shower. In the case of conditions permitting backflow of water into the feed line, the safeguard mechanism prevents backflow and aerates the pipe and the hose while exposing an aeration aperture.

Abstract: Water supplied from a mixing faucet or combination set via an inflow chamber to a change-over valve effects by impact pressure that a double-sided valve member--as a result of an asymmetrical arrangement between a first valve seat and a second valve seat--moves to the first valve seat, thereby blocking the supply to a shower outlet. Therefore, the water is conducted via the second valve seat into a bath-tub outlet. By actuating a draw-button, the double-sided valve member is reversed in order to block the bath-tub outlet and release the shower outlet. Impact pressure now effects self-locking in this position. When the water is turned off and impact pressure no longer prevails, the two-sided valve member thereupon moves into an inoperative positon by the force of two mutually counteracting springs. The conduit leading to the shower is automatically emptied by means of an annular gap remaining between the first valve seat and the double-sided valve member.

Abstract: The water fitting (10) has a substantially tubular casing (12) which is closed at one end by the partition element (16). The turbine wheel (24) which is acted upon in the axial direction by the water supplied through the inlet connection (14), is rotatably supported within the casing (12). The first coupling part (28), which has an annular permanent magnet (62), is rotationally solidly connected to the turbine wheel (24). The second coupling part (30), which is seated on the rotor shaft (70) of the direct current generator (20), is provided on the other side of the partition element (16). The second coupling part (30) also has an annular permanent magnet (62). The rotational motion of the turbine wheel (24) is transmitted magnetically to the rotor (74) of the direct current generator (20) by means of the two coupling parts (28, 30), this direct current generator supplying the electricity for charging the storage element (32) of the electrical control arrangement (36).

Abstract: The sealing arrangement comprises a seal having end sealing surfaces. The one end sealing surface bears against an annular sealing surface of a valve seat screwed into a lower part of a water faucet. The other end sealing surface presses upon a non-rotatable disk which bears against a rotary disk. The seal comprises radially outwardly projecting supporting ribs in the region of the end sealing surfaces. These supporting ribs are supported at a supporting ring of a housing of a ceramic upper part or portion. A slit spring washer bears against the seal at the inner or internal side thereof. With this sealing arrangement it is rendered possible that the seal has to be fitted into the water faucet with only a small bias or loading, because the seal efficiently utilizes the water pressure and converts or transforms such water pressure into a force which presses the end sealing surfaces with greaater compression or pressure against the annular sealing surface and the non-rotatable disk, respectively.

Abstract: A housing for a discharge valve includes a hollow cylindrial socket which projects in the radial direction, and in which a siphon an actuating pin for control of the valve stopper is mounted in a leakproof manner in a ball-and-socket joint arrangement. A spherical part enclosing an intermediate portion of the actuating pin is received in a ball socket recess in a holding element, which is snapped onto the socket in a leakproof manner. The ball socket recess has on the outer side a spheri-zone type sealing surface on which an O-ring slides. A set of fingers of the holding element partially enclose the spherical part and press it with a specific force against the sealing surface.