EP0447777A1 - Sicherungseinrichtung für eine sanitäre Armatur - Google Patents

Sicherungseinrichtung für eine sanitäre Armatur Download PDF

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Publication number
EP0447777A1
EP0447777A1 EP91101556A EP91101556A EP0447777A1 EP 0447777 A1 EP0447777 A1 EP 0447777A1 EP 91101556 A EP91101556 A EP 91101556A EP 91101556 A EP91101556 A EP 91101556A EP 0447777 A1 EP0447777 A1 EP 0447777A1
Authority
EP
European Patent Office
Prior art keywords
valve
safety device
flow
actuating
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91101556A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ferdinand Hochstrasser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Franke Technology and Trademark Ltd
Original Assignee
KWC AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KWC AG filed Critical KWC AG
Publication of EP0447777A1 publication Critical patent/EP0447777A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve

Definitions

  • the present invention relates to a safety device for preventing water from flowing back into a feed line of a sanitary fitting according to the preamble of claim 1.
  • sanitary fittings in which the quality of the feed water can be jeopardized if contaminated water is sucked back into the feed line.
  • Such fittings must have safety devices with which the sucking back of contaminated water into the feed line is prevented.
  • Such a safety device is known from DE-OS 36 03 503.
  • the fitting described in this DE-OS has a shut-off valve which is connected in the flow path between the feed line and the outlet of the fitting. Seen from the flow path in the flow direction of the water, an aeration path branches off after the shut-off valve, in which a valve the Security device is switched.
  • This valve is designed as a sensitive check valve that is in the closed position under normal operating conditions. Under conditions that enable backflow, the valve opens automatically and aerates the feed line and the flow path in order to prevent the water from flowing back.
  • DE-OS 38 05 462 now proposes to arrange two valves one behind the other in the ventilation path in such a way that the vacuum only affects the first valve closer to the flow path when the water tapping process is stopped quickly. The delay between the two valves ensures that the second valve does not open under these operating conditions, so that a water drop escaping through the first valve is caught in the area between the two valves. If there is a longer negative pressure, such as occurs under conditions that enable a backflow, both valves of the safety device open in order to vent the feed line and the flow path and to prevent water from flowing back into the feed line.
  • an actuator which is acted upon by the flow in the flow path.
  • This actuator is operatively connected to a valve body of a valve connected in the ventilation path.
  • the actuator Under normal operating conditions, the actuator is kept in operating position by the flow, which ensures that under these conditions the valve is always closed.
  • the actuating member Under conditions that enable backflow, the actuating member is acted upon in the opposite direction by the flow, which leads to the actuating member being moved into a backflow position.
  • the valve is forcibly opened by the operative connection between the actuating member and the valve body. This results in a reliable, safe ventilation of the feed line under conditions that enable backflow.
  • the sanitary fitting shown in FIG. 1 has a fitting housing 10 and a pull-out hose shower 12.
  • the valve housing 10 consists essentially of three parts, a lower and an upper housing part 14 and 16, these form a fixed housing part 16a, and a jacket element 20 pivotably mounted on the latter about an axis 18 running in the vertical direction.
  • the lower housing part 14 is essentially sleeve-shaped, penetrates with an attachment piece 22 an approximately horizontal edge 24 of a sink 26 and is held on the sink 26 by means of a nut 28 screwed onto the attachment piece 22.
  • the upper housing part 16 sits on the lower housing part 14 and is fastened to it.
  • the essentially cylindrical, fixed housing part 16a formed by the lower and upper housing parts 14, 16 is encompassed by the jacket element 22, which is pivotally mounted on the latter about the axis 18.
  • the upper housing part 16 has a blind hole-shaped cylindrical housing recess 30, into which a control cartridge 32, which is only indicated schematically, is inserted.
  • the control cartridge 32 is a single-lever mixing valve, as is generally known and is described in detail, for example, in Swiss Patents 651 119 and 654 088.
  • the control cartridge 32 is connected to a respective feed line 34 for cold and warm water, only one of the feed lines 34 being shown in FIG. 1.
  • the feed lines 34 are guided from below through the mounting piece 22 and the lower housing part 14 and open into a bore, not shown, in the upper housing part 16, which connects the feed lines 34 to the control cartridge 32 on the inlet side.
  • the control cartridge 32 is followed by a safety device 36, only schematically indicated in this figure, which is inserted into a further, pocket-shaped housing recess 38 in the upper housing part 16, which is open towards the lower housing part 14.
  • a through opening 40 is provided between the housing recess 30 and the further housing recess 38, which connects the control cartridge 32 to the securing device 36 in a flow connection.
  • a tube 42 leads away from the securing device 36 in the direction of the axis 18 and leads through the mounting piece 22 is passed under the sink 26.
  • the end of the tube 42 on this side is connected to a flexible hose 44 of the hose shower 12, which is formed below the sink 26 and forms a storage loop with the other end region through the fastening connection 22 again.
  • the lower housing part 14 has an opening 46 running approximately in the radial direction, through which the end region of the hose 44 is guided into a socket 48 formed on the jacket element 20 and protruding therefrom at an angle.
  • the hose 44 opens into a shower 50, the handle 50 'of which is inserted with the hose-side end region into a guide bush 48' arranged in the connecting piece 48 and can be pulled out again.
  • the outlet of the hose shower 12 is designated 52.
  • the opening 46 for the hose 44 is so large in the circumferential direction of the lower housing part 14 that pivoting of the jacket element 22 about the axis 18 is possible without problems.
  • a ventilation channel 54 is provided, which extends from the further housing recess 38 to the socket 48.
  • a hole 56 is provided on the top of the nozzle 48, which, together with the nozzle 48 and the ventilation channel 54, forms a ventilation path 58, connects the safety device 36 to the ambient air.
  • Another possible embodiment of the ventilation path 58 is described in the CH patent application 04 481 / 89-9.
  • the flow path 60 connects the feed line 34 to the outlet 52. It runs through the control cartridge 32, which, seen in the flow direction S of the water, runs through it downstream securing device 36, the tube 42, the hose 44 and the shower 50.
  • a first embodiment of the safety device 36 is shown in vertical section under normal operating conditions or under conditions that allow backflow.
  • the securing device 36 is inserted from below into the further housing recess 38 of the upper housing part 16.
  • the securing device 36 is advantageously fastened to the upper housing part 16 in such a way that it can be easily removed, for example for maintenance. It is thus possible to design the securing device 36 to be screwable into the upper housing part 16 or to fix it in a known manner with pins or spring washers by means of screws as shown in FIGS. 6 and 7.
  • the passage opening 40 opens into the further recess 38 from above and connects the safety device 36 connected downstream of the control cartridge 32 in flow direction S (see also FIG. 1).
  • the flow path connecting the feed line 34 to the outlet 52 is indicated by an arrow 60 in FIGS. 2 and 3.
  • the ventilation channel 54 of the ventilation path 58 opens from the side into the further housing recess 38.
  • the securing device 36 has a housing 62 which is essentially rotationally symmetrical with respect to the axis 38 'of the cylindrical further housing recess 38, which is inserted into the further housing recess 38 from below and extends to above the ventilation channel 54.
  • the housing 62 On the side facing the passage opening 40, the housing 62 has a blind hole-shaped recess 64, which is rotationally symmetrical to the axis 38 'and in which a substantially rotationally symmetrical actuating body 68, which is designed as an actuating member for a valve 66, is arranged.
  • an annular valve seat 70 is formed, which extends around the axis 38' and surrounds a ventilation opening 72.
  • the ventilation opening 72 runs downward from the valve seat 70 first in the direction of the axis 38 ′ and then in the radial direction to a circumferential groove 74 provided on the housing 62, which is flow-connected to the ventilation channel 54.
  • the ventilation opening 72 is part of the ventilation path 58 and, when the valve 66 (FIG. 3) is open, connects the flow path 60 to the ventilation channel 54 and thus to the ambient air.
  • the bottom 64 ′ has a groove-shaped recess 76, from which flow bores 78 run parallel to the axis 38 ′ and open at their lower end into an outlet opening 80 in the housing 62.
  • the outlet opening 80 is fluidly connected to the tube 42, which is tightly inserted into and held in a cylindrical outlet outlet 82 attached to the housing 62 and running in the direction of the axis 38 ′.
  • the actuating body 68 has a lower body part 84 and a perforated disk 86 abutting thereon.
  • Flow passages 88 which are aligned with one another and run parallel to the axis 38 ', run through the perforated disk 86 and the body part 84 and are arranged on two circles concentric to the axis 38', as shown in FIG 4 shows the plan view of the securing device 36 shown particularly clearly.
  • the flow passages 88 open into a cup-shaped or bell-shaped cavity 90 in the body part 84 which is open towards the bottom.
  • the perforated disk 86 is held on the body part 84 by a socket screw 92 protruding into the cavity 90, which abuts the body part 84 with a screw shoulder 94 and penetrates the body part 84 with its screw 94 'in the direction of the thread 94' connecting upwards.
  • the thread 94 ' is screwed into a corresponding counter thread in the perforated disk 86.
  • a valve body 98 of the valve 66 is seated on the shaft 96 of the shaft screw 92 and has a sealing lip 100 which cooperates with the valve seat 70 at its lower end region.
  • the valve body 98 is held on the stem 96 between the head 94 ′′ of the stem screw 92 and a protective shield 102 formed on the stem 96.
  • the protective shield 102 provided between the screw shoulder 94 and the valve body 98 widens conically in the flow direction S and tapers in one step, forming a flank 102 ′ on which the valve body 98 abuts.
  • the annular valve body 98 which is made of rubber-elastic material, has a shape similar to the protective shield 102, the sealing lip 100 being separated from the conically widening part of the valve body 98 by a circumferential groove 100 '.
  • the outline of the protective shield 102 and the valve body 98 forms a sawtooth shape in vertical section, the steep flanks of which face away from the flow direction S.
  • the securing device 36 has a sealing member 104 made of rubber-elastic material, which is designed in the form of a rolling membrane.
  • the ring-shaped and in Cross-section U-shaped sealing member 104 engages around the upper end 62 'of the housing 62 and is held clamped at its inner end region between the body part 84 of the actuating body 68 and the perforated disk 86.
  • the sealing member 104 has a circumferential bead 104 ′ which engages in a circumferential retaining groove 106 in the housing 62 and lies against the upper housing part 16 along its circumference.
  • the sealing member 104 thus prevents water from flowing between the housing 62 and the actuating body 68, but at the same time seals the peripheral groove 74 with its bead 104 ′, so that no water between the housing 62 and the upper housing part 16 into the peripheral groove 74 and thus can get into the ventilation path 58.
  • a circumferential sealing groove 108 is formed on the housing 62, in which an O-ring 110 is arranged, which lies circumferentially on the upper housing part 16 below the ventilation channel 54 in order to seal the ventilation path 58 against the environment in the area of the securing device 36. This is to prevent water that may be escaping into the ventilation path 58 from flowing out of the fitting in an uncontrolled manner.
  • the actuating body 68 is in the operating position that takes up under normal operating conditions. In this operating position, the actuating body 68 is supported with a shoulder 112 formed on the body part 84 against the flow direction S against a stop 114 on the housing 62 which cooperates with this shoulder 112. This ensures that the sealing lip 100 is defined on under normal operating conditions Valve seat 70 is present.
  • the body part 84 has a sliding bead 116, by means of which the actuating body 68 is guided in a smooth manner on and against the flow direction S on the housing 62. This also prevents calcification of the securing device 36 between the sliding bead 116 and the sealing member 104 in the area between the housing 62 and the actuating body 68.
  • actuating body 68 is shown raised in the reflux position 68 'against the flow direction S.
  • the membrane-shaped sealing member 104 is in contact with the upper end 38 ′′ of the further housing recess 38 at the upper housing part 16 and limits the movement of the actuating body 68 against the flow direction S. Since the valve body 98 is rigidly connected to the actuating body 68, it is in the reflux position 68 'Actuating body 68, the valve 66 is opened by the sealing lip 100 being lifted off the valve seat 70. In this case, the flow path 60 and thus the feed line 34 (see also FIG. 1) is connected and ventilated with the ventilation path 58 and thus with the ambient air.
  • FIG. 5 shows a section at the level of line V of FIG. 2 through a further possible embodiment of the housing 62 of the securing device 36.
  • the ventilation opening 72 initially runs in the direction of the axis 38 ′ and then forks in two in the radial direction extending arms 72 'aligned with each other.
  • three flow bores 78 each run in the direction of the axis 38', which connect the recess 64 in the housing 62 to the outlet opening 80 (see also Figures 2 and 3).
  • the flow bores 78 are arranged in a circle distributed around the axis 38 '.
  • the safety device 36 shown in FIGS. 2 to 5 operates as follows: Under normal operating conditions, the actuating body 68 is in the operating position shown in FIG. 2. The valve 66 is closed, the flow path 60 is thus separated from the ventilation path 58. When the control cartridge 32 is open (cf. FIG. 1), the water flows in the direction of flow S through the passage opening 40 into the further housing recess 38 and acts on the actuating body 68 and the sealing member 104. The shoulder 112 present at the stop 114 prevents against the force the action of the water in the flow direction S a movement of the actuating body 68 in the direction of the arrow S. The sealing lip 100 of the valve 66 thus lies against the valve seat 70 in a defined manner.
  • the water flows along the flow path 60 through the flow passages 88 in the actuating body 68 to the cavity 90, from where it flows through the flow bores 78 into the outlet opening 80. From there, the water is fed through the pipe 42, the hose 44 and the shower 50 to the outlet 52.
  • the protective shield 102 and the thickening on the valve body 98 prevent the sealing lip 100 from being acted upon directly by the water flowing through the flow passages 88 and could thereby be damaged.
  • valve 66 remains closed even if the water dispensing process is quickly stopped by rapidly closing the control cartridge 32, because in spite of one possibly built up negative pressure in the part of the flow path 60 following the control cartridge 32 in the flow direction S, the actuating body 68 is pulled in the flow direction S by the inertia of the water column, which prevents the sealing lip 100 from lifting off the valve seat 70. Under normal operating conditions, it is therefore impossible for water to escape through the ventilation path 58.
  • the sawtooth-shaped design of the protective shield 102 and the valve body 98 has a greater flow resistance in the direction of the arrow S than in the direction of the arrow S, which increases the force in the opposite direction of the arrow S to raise the actuating body 68 into the reflux position 68 'under conditions that enable backflow. An even faster opening of valve 66 is thereby achieved. It should be noted that when valve 66 is open, the outlet side of the fitting is also vented through ventilation path 58. The first time fresh water is supplied in the direction of flow S the actuating body 68 is now immediately brought back into the operating position by the action, which results in the valve 66 being closed.
  • FIGS. 6 and 7 show in a vertical section a further embodiment of the securing device 36, which is very similar to the embodiment shown in FIGS. 2 to 4.
  • the main difference is that a check valve 118 is provided in the outlet opening 80, which automatically closes under conditions that enable a backflow in order to prevent water from being drawn in through the outlet 52.
  • the parts corresponding to one another in FIGS. 6 and 7 and 2 and 3 are provided with the same reference numerals and are only described to the extent that this is necessary for an understanding of FIGS. 6 and 7. For further details, reference is made to the corresponding description for FIGS. 2 to 4.
  • the securing device 36 is inserted from below into the further housing recess 38 of the upper housing part 16 and is held by means of a retaining screw 120 which extends in the radial direction with respect to the axis 38 ′ and is screwed into the upper housing part 16.
  • the retaining screw 120 is tapered in the shape of a truncated cone at its end region facing the housing 62 of the securing device 36 and engages in a retaining groove 122 provided all around the housing 62.
  • the housing 62 On the side facing the passage opening 40, the housing 62, which is essentially rotationally symmetrical about the axis 38 ′, has the blind hole-shaped recess 64, in which the actuating body 68 for the valve 66 is provided is.
  • the annular valve seat 70 of the valve 66 On the bottom 64 'of the recess 64, the annular valve seat 70 of the valve 66 is formed, which delimits the ventilation opening 72. This extends from the valve seat 70 downwards in the direction of the axis 38 ′ and then in the radial direction to the circumferential groove 74 formed on the housing 62, which is in flow connection with the ventilation channel 54 in the upper housing part 16.
  • the valve 66 thus separates the aeration path 58 from the flow path 60 of the water.
  • valve seat 70 runs the recess 76 in the bottom 64 ', from which the flow bores 78 run parallel to the axis 38' to the outlet opening 80.
  • These flow bores 78 are arranged in a circle around the axis 38 ′.
  • the check valve 118 provided in the outlet opening 80 has an annular disk-shaped valve body element 124 made of rubber-elastic material, which is clamped with its inner end region by means of a screw 126 between the upper wall 80 ′ of the outlet opening 80 and a disk 128. Seen in the radial direction, the disk 128 ends before the flow bores 78 open into the outlet opening 80 and is bent downward at its outer edge region. Outside the clamping area between the upper wall 80 'and the disk 128, the valve body element 124 is bent bell-shaped towards the bottom when the water flows in the flow direction S, as shown in FIG. 6. If, on the other hand, no water is flowing, the valve body element 124 bears against the upper wall 80 'due to the inherent rigidity (cf.
  • the bent edge of the disk 128 prevents injury to the valve body element 124 if it flows through the flow bores 78 in the flow direction S Water is applied.
  • the screw 126 penetrates with its shaft from the ventilation opening 72 into the housing wall 62 ′′ between the ventilation opening 72 and the outlet opening 80, the annular valve body element 124 and the washer 128 and a nut 126 ′ is placed on it from below.
  • connection flange 130 is screwed into the outlet opening 80 directed downward, in which the end region of the tube 42 on this side is inserted and held.
  • the outlet opening 80 is sealed off from the surroundings by means of an O-ring 132, which is inserted into an undercut 134 behind the thread 130 ′ of the connecting flange 130 and bears on the circumference of the housing 62.
  • the check valve 118 is shown in FIG. 7 under conditions that enable a backflow. If water tries to flow against the flow direction S from the outlet 52 (cf. FIG. 1) in the direction toward the feed line 34, the rubber-elastic valve body element 124 is acted on from below, which leads to the valve body element 124 against the upper wall 80 '. is pressed and it tightly closes the mouths of the flow bores 78. This prevents water from flowing back against the direction of flow S.
  • the actuating body 68 has the lower, essentially rotationally symmetrical body part 84 and the perforated disk 86 arranged above it and abutting against it.
  • Flow passages 88 aligned with one another run through the perforated disk 86 and the body part 84, which are arranged in a circle around the axis 38 'and run parallel to this axis 38'.
  • the bell-shaped or cup-shaped cavity 90 which is open towards the bottom and into which the flow passages 88 open, is formed.
  • the valve body 98 cooperating with the valve seat 70 is provided, on which the sealing lip 100 is formed on the side facing the valve seat 70.
  • the annular valve body 98 is seated on a shaft 136 running in the direction of the axis 38 ', which rests on the body part 84 with a shaft shoulder 136', penetrates it and engages with its upper end region in a blind hole 138 in the perforated disk 86.
  • the shaft 136 is lamellar or rib-shaped at its end region engaging in the blind hole 138 in order to hold the shaft 136 in the perforated disk 86.
  • the conically widening protective shield 102 is formed on the shaft 136, which, forming the flank 102', tapers in the form of a step.
  • a rib 136 ′′ is formed on the shaft at the lower end region. Between this rib 136 ′′ and the flank 102 ′, the valve body 98 seated on the shaft 136 is held so that it cannot move.
  • the upper end 62 'of the housing is encompassed by the cross-sectionally U-shaped rolling membrane-like sealing element 104 made of rubber-elastic material, which is held at its outer end by means of the bead 104' which engages in the holding groove 106 of the housing 62.
  • the bead 104 ′ bears against the upper housing part 16.
  • the bead 104 'thus also seals the circumferential groove 74 from above. With its inner end region, the sealing member 104 is clamped between the body part 84 and the perforated disk 86.
  • the actuating body 68 is shown raised into the reflux position 68 ′ under conditions that enable backflow. In this position, valve 66 is forcibly opened and flow path 60 is thereby connected to ventilation path 58.
  • the actuating body 68 is smoothly guided on the housing 62 when moving back and forth from the operating position into the return position and vice versa by means of the sliding bead 116. Tilting is also prevented by the membrane-shaped sealing element 104.
  • the actuating body 68 Under normal operating conditions, the actuating body 68 is in the operating position shown in FIG. 6.
  • the valve 66 is always closed and the check valve 118 if no water flows.
  • the control cartridge 32 When the control cartridge 32 is open (cf. FIG. 1), the water flows in the flow direction S along the flow path 60 through the flow passages 88 in the actuating body 68 and the flow bores 78 while keeping the check valve 118 open to the outlet opening 80, where it is fed to the pipe 42.
  • the pipe 42 leads the water to the hose 44, which leads it to the hose shower 12, from which it emerges at the outlet 52.
  • the ventilation path 58 is separated from the flow path 60 by the closed valve 66.
  • the actuating body 68 is raised into the reflux position 68 ′ shown in FIG. 7 by the negative pressure present on the feed side, which leads to the forced opening of the valve 66.
  • the feed line 34 is connected to the ambient air through the ventilation path 58.
  • the actuating body 68 is moved back into the operating position by the application of water, which results in the valve 66 being forced to close.
  • check valve 118 connected in the flow path and downstream of the opening of the ventilation path 58 in the flow path 60 in the flow direction S in a different way.
  • a ball valve is also conceivable.
  • FIGS. 8 and 9 show the safety device 36 shown in FIGS. 6 and 7, but instead of the protective shield 102, a throttle element 140 made of elastic material is provided on the shaft 96.
  • the reference numerals in FIGS. 8 and 9 correspond to those in FIGS. 6 and 7; With regard to the structure and mode of operation of the securing device 36, reference is therefore made to these figures and the corresponding description.
  • the annular throttle element 140 has a bell-like cross section, so that it rests on the body part 84 on the side facing the cavity 90 when the water is not flowing in the flow direction S and covers the flow passages 88 on the body part 84 (FIG. 9).
  • a through hole 142 is provided in the throttle element 140, which is aligned with one of the flow passages 88 and has a smaller free cross section than the corresponding flow passage 88 '.
  • the shaft 96 has a circumferential retaining rib 144 on the side facing the body part 84 with respect to the valve body 98 in order to hold the valve body 98 between itself and the rib 136 ′′ and to clamp the throttle element 140 between it and the body part 84.
  • the shaft 96 In the area of the throttle element 140 and the body part 84, the shaft 96 is cylindrical, and it is held in the perforated disk 86 with its upper lamellar or rib-like end area which engages in the blind hole 138.
  • the actuating body 68 Under normal conditions, the actuating body 68 is in the operating position shown in FIG. 8, the sealing lip 100 abutting the valve seat 70 in order to keep the valve 66 closed.
  • the control cartridge 32 When the control cartridge 32 is open (FIG. 1), the water flows in the flow direction S through the safety device 36, the throttle element 140 being in the position shown in FIG. 8 deformed and the check valve 118 is opened. If the water flow is interrupted by closing the control cartridge 32, the throttle element 140 automatically contacts the body part 84 and the check valve 118 closes.
  • the restriction of the flow path 60 by the throttle element 140 also helps prevent water from flowing back if the check valve 118 is defective.
  • the safety device 36 shown in FIGS. 2 and 3 can also be equipped with a corresponding throttle element.
  • the actuator can of course also be designed differently than shown in the figures. In any case, it is located in the flow path and is affected by the water. For example, it could be designed as a throttle element or as a resistance element and is operatively connected to the valve body.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Domestic Plumbing Installations (AREA)
  • Check Valves (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
EP91101556A 1990-03-23 1991-02-06 Sicherungseinrichtung für eine sanitäre Armatur Withdrawn EP0447777A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH97290A CH681238A5 (fi) 1990-03-23 1990-03-23
CH972/90 1990-03-23

Publications (1)

Publication Number Publication Date
EP0447777A1 true EP0447777A1 (de) 1991-09-25

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Application Number Title Priority Date Filing Date
EP91101556A Withdrawn EP0447777A1 (de) 1990-03-23 1991-02-06 Sicherungseinrichtung für eine sanitäre Armatur

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EP (1) EP0447777A1 (fi)
CA (1) CA2022585A1 (fi)
CH (1) CH681238A5 (fi)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639675A1 (de) * 1993-08-17 1995-02-22 Kwc Ag Rückflussverhinderer
US5454396A (en) * 1993-08-17 1995-10-03 Kwc Ag Sanitary safety device for preventing the backflow of water
EP1234917A1 (de) 2001-02-27 2002-08-28 Kwc Ag Sanitärarmatur
US7810521B2 (en) 2006-11-02 2010-10-12 Kwc Ag Sanitary fitting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305634U1 (de) * 1993-04-15 1993-06-17 Metallwerke Gebr. Seppelfricke Gmbh & Co, 4650 Gelsenkirchen Rohrbelüfter für Trinkwasserinstallationen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE206227C (fi) *
US3636968A (en) * 1970-10-05 1972-01-25 Watts Regulator Co Cross-connection control valve
FR2226599A1 (fi) * 1973-04-23 1974-11-15 Braukmann Armaturen
AT350346B (de) * 1975-09-17 1979-05-25 Braukmann Armaturen Rueckflussverhinderer
DE8813390U1 (de) * 1988-10-25 1989-01-05 Flege, Uwe, Dipl.-Ing., 2104 Hamburg Spültischbatterie
DE3839650C1 (fi) * 1988-11-24 1990-02-15 Hansa Metallwerke Ag, 7000 Stuttgart, De

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE206227C (fi) *
US3636968A (en) * 1970-10-05 1972-01-25 Watts Regulator Co Cross-connection control valve
FR2226599A1 (fi) * 1973-04-23 1974-11-15 Braukmann Armaturen
AT350346B (de) * 1975-09-17 1979-05-25 Braukmann Armaturen Rueckflussverhinderer
DE8813390U1 (de) * 1988-10-25 1989-01-05 Flege, Uwe, Dipl.-Ing., 2104 Hamburg Spültischbatterie
DE3839650C1 (fi) * 1988-11-24 1990-02-15 Hansa Metallwerke Ag, 7000 Stuttgart, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639675A1 (de) * 1993-08-17 1995-02-22 Kwc Ag Rückflussverhinderer
US5454396A (en) * 1993-08-17 1995-10-03 Kwc Ag Sanitary safety device for preventing the backflow of water
US5551483A (en) * 1993-08-17 1996-09-03 Kwc Ag Backflow-preventer
EP1234917A1 (de) 2001-02-27 2002-08-28 Kwc Ag Sanitärarmatur
US6631735B2 (en) 2001-02-27 2003-10-14 Kwc Ag Sanitary fitting
US7810521B2 (en) 2006-11-02 2010-10-12 Kwc Ag Sanitary fitting

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CH681238A5 (fi) 1993-02-15
CA2022585A1 (en) 1991-09-24

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