EP3794184A1 - Fluid valve systems - Google Patents
Fluid valve systemsInfo
- Publication number
- EP3794184A1 EP3794184A1 EP19803334.2A EP19803334A EP3794184A1 EP 3794184 A1 EP3794184 A1 EP 3794184A1 EP 19803334 A EP19803334 A EP 19803334A EP 3794184 A1 EP3794184 A1 EP 3794184A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- float
- assembly
- fluid
- outlet
- tube
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 134
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 130
- 239000000463 material Substances 0.000 description 14
- 239000000945 filler Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 8
- 230000009977 dual effect Effects 0.000 description 7
- 230000000670 limiting effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 230000036961 partial effect Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000009428 plumbing Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000003651 drinking water Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 235000012206 bottled water Nutrition 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 229920001577 copolymer Polymers 0.000 description 1
- 239000002181 crystalline organic material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
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- 239000011147 inorganic material Substances 0.000 description 1
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- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001206 natural gum Polymers 0.000 description 1
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- 229920003225 polyurethane elastomer Polymers 0.000 description 1
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- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
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- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
- E03D1/30—Valves for high or low level cisterns; Their arrangement ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage
- E03D1/33—Adaptations or arrangements of floats
-
- 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
- E03C1/102—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using an air gap device
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
- E03D1/30—Valves for high or low level cisterns; Their arrangement ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage
- E03D1/32—Arrangement of inlet valves
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
- E03D1/02—High-level flushing systems
- E03D1/14—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves
- E03D1/142—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with flushing valves
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D2201/00—Details and methods of use for water closets and urinals not otherwise provided for
- E03D2201/20—Noise reduction features
Definitions
- a toilet cistern usually includes a fill valve arranged to supply water to fill the toilet cistern.
- the fill valve is connected to the domestic water supply.
- the water stored within the toilet cistern is considered to be non-potable, and must be isolated from the plumbing system to prevent contamination of the drinking water supply within the property. Incidents have been identified where non-potable water contained with the toilet cistern has been siphoned back into the plumbing system due to the manner in which the fill valve is installed within the cistern. If the outlet of the fill valve is in contact with the water within the cistern, it is possible that a siphon action may be created as water flows back down the inlet pipe when filling stops.
- A“Type AG” air gap is typically achieved in a toilet cistern by locating the outlet of the fill valve at a fixed spaced location above the water level. Water discharges from the fill valve outlet and falls into the body of water within the cistern. While this solution addresses the“Type AG” air gap requirements, it is deemed to be undesirable due to the noise generated by the water as it falls into the cistern from the fill valve. Furthermore, the extent to which noise can be minimized by reducing the height of the fill valve outlet is limited by the minimum regulatory height.
- a fill tube is connected to the fill valve outlet, and water from the fill valve discharges directly into the fill tube.
- the fill tube extends downwardly into the body of water in the cistern, and a gap is defined between the bottom of the fill tube and the base of the cistern through which the water empties into the cistern from the fill tube.
- the water level within the fill tube is the same as the cistern water level, the discharge noise from the fill valve is attenuated by the fill tube.
- the water within the valve is capable of being siphoned back into the fill valve. Therefore, cisterns employing such fill tube arrangements do not comply with current regulations.
- a fill valve assembly often includes a float that is connected to the valve such that it closes the valve when the water level reaches a pre-defined maximum level, and opens the valve when the water level falls below this level to allow the flow to re-fill the cistern.
- Traditional ballcock valves include a float attached via a lever arm to the fill valve, which controls in the incoming water supply. When the cistern is empty, the ballcock float is suspended at the end of the lever arm, which pivots downwardly. During use, the fill valve is open and water enters the cistern.
- the float When the water level reaches the ballcock float, the float begins to rise with the water level until it eventually pivots the lever to a position where it closes the fill valve, which corresponds to a pre-set water level in the cistern.
- a flush valve is opened by the flush lever and water begins to pour out of the cistern into the toilet bowl.
- the fill valve opens and water begins entering the cistern. This means that the toilet is emptying and filling at the same time. The rate that the water empties through the flush valve is greater than the rate of filling and the flush valve eventually closes.
- Delayed fill valves address this problem by only allowing a cistern to start refilling once the flush cycle has been completed.
- Delayed fill valves usually include a float chamber or float shroud within which the float is located.
- the float shroud includes a small inlet aperture in its base. As the cistern fills, the float shroud fills as water enters the float shroud through the inlet aperture in the base and/or by flowing into the upper end of the float shroud. As the float rises, and the fill valve closes.
- the size of the aperture in the base of the float shroud is significantly smaller in diameter than the flush outlet. Accordingly, the flow rate from the shroud is far lower and the shroud takes longer to empty. Consequently, the water level in the shroud falls at a much slower rate than the water level in the cistern.
- the size of the aperture in the shroud is selected such that the float only falls to a level at which the fill valve opens once the flush volume has left the cistern, and the cistern’s flush valve has closed.
- toilet cisterns are also provided with a‘dual flush’ valve system.
- Dual flush valves allow a full flush, in which the full flush volume empties from the cistern, and a‘partial’ flush, in which a reduced amount of water is emptied into the bowl.
- dual flush valve assemblies are provided which use a siphon valve in which the siphoning action created in the siphon during flushing is used to control the volume of flushed water.
- the half flush setting on a dual flush valve interrupts the siphon effect by providing an air inlet aperture to the siphon that halts the siphon action once it is uncovered.
- the height of the aperture determines the volume of the‘half flush’.
- a dual flush valve can result in water savings of two to three liters per flush.
- the height of the float is closer to the height of the water within the cistern, and thus the float rises to a height where it closes the fill valve before the water level in the cistern has reached the height required for a full flush volume. Consequently, when the user attempts to operate a full flush, the water volume is not sufficient, and the user will often flush for a second time, which negates the intended water saving function of the delay fill and dual flush valves.
- the fluid valve assembly must be adjustable in height to vary the uppermost height of the float.
- the height of the fluid valve assembly is determined by the height at which the inlet pipe enters the cistern, and this can be set during manufacture depending on the cistern and fill height required.
- the inlet pipe enters the cistern through the base and the height of the float is determined by the position at which it is secured along the inlet pipe. While minor adjustment of the water height can be achieved using an adjustment screw, the height of the float is substantially fixed. Accordingly, fill valve assemblies of varying lengths must be manufactured to accommodate cisterns of varying volumes.
- Some embodiments include a fluid control assembly comprising a fluid valve assembly coupled to an inlet pipe, and a filling tube coupled to, integrated with, or positioned adjacent to the fluid valve assembly, where the filling tube includes an inlet aperture.
- a fluid outlet assembly coupled to or integrated with the fluid valve assembly.
- the fluid outlet assembly comprises an outlet aperture positioned at a specific distance from the inlet aperture forming a space or air gap between the inlet aperture and the outlet aperture.
- the outlet aperture and inlet aperture are at least partially aligned to enable fluid to travel from the fluid valve assembly and across the air gap and at least partially into the inlet aperture when a valve of the fluid valve assembly is actuated to an open or on position.
- valve actuating assembly configured and arranged to control the valve.
- the valve actuating assembly comprises at least one moveable float.
- the at least one moveable float comprises a variable buoyancy float including a plurality of chambers, and where one of the chambers of the plurality of chambers includes an air bleed aperture.
- Some embodiments include at least one moveable float that is positioned at least partially around the filling tube. In some embodiments, the at least one moveable float is positioned adjacent the filling tube. Some further embodiments include a float shroud, where the at least one moveable float is at least partially positioned within the float shroud. Some embodiments include a base of the float shroud that includes an aperture configured to allow fluid to enter the float shroud.
- the valve actuating assembly includes a control rod coupled to a float at one end and a linkage of the valve actuating mechanism at the opposite end.
- Some embodiments include an actuating portion of the linkage configured to cause a sealing portion of a diaphragm of the valve to move into or away from a sealing engagement to control fluid flow through the valve.
- the inlet pipe is generally perpendicular to the filling tube. In some embodiments, the inlet pipe comprises a support pipe generally parallel to the filling tube. In some embodiments, the support pipe comprises a support of the fluid valve assembly, where the fluid valve assembly is coupled to the support pipe by a connector tube. In some further embodiments, the support pipe is configured to be locked to the connector tube with a locking assembly.
- the locking assembly comprises a first locking element provided on the connector tube that is configured to engage with a corresponding second locking element on the support tube to axially fix the connector tube in position relative to the support tube and to allow vertical adjustment of the connector tube relative to the support tube.
- Some embodiments further comprise a locking member movable between a locked position in which the first and second locking element are in locking engagement and the locking member prevents release of the first and second locking elements from said locking engagement, and an unlocked position in which the first and second locking elements may be released from locking engagement to allow vertical adjustment of the connector tube relative to the support tube.
- the fluid outlet comprises a fluid flow channel defined between an inlet and outlet configured to impart a rotational force to fluid passing through the fluid flow channel.
- the filling tube, valve actuating assembly and outlet aperture are axially aligned.
- Some embodiments include an assembly comprising a fluid valve assembly including an outlet, and a filling tube adjacent to the fluid valve assembly, where the filling tube includes an inlet aperture at least partially axially aligned with the outlet.
- Some embodiments include an outlet aperture positioned at a specific distance from the inlet aperture forming a space or air gap between the inlet aperture and the outlet aperture.
- Some embodiments include a moveable float configured and arranged to control a sealing member of the fluid valve based at least in part on the position of the moveable float relative to the outlet.
- the moveable float comprises a variable buoyancy float including a plurality of chambers, where one of the chambers of the plurality of chambers includes an air bleed aperture.
- the filling tube is circumferentially surrounded by the moveable float.
- FIG. 1 shows a cross-section view of a toilet cistern including a fluid valve assembly according to an embodiment of the invention.
- FIG. 2 shows a cross-section view of the fluid valve assembly of FIG. 1 according to an embodiment of the invention.
- FIG. 3 is shows an outlet assembly of a fluid valve assembly according to an embodiment of the invention.
- FIG. 4 shows a cross-section view of a fluid valve assembly according to another embodiment of the invention.
- FIG. 5 shows a cross-section view of a toilet cistern including the fluid valve assembly of FIG. 4 according to an embodiment of the invention.
- FIG. 6 shows a view from below of a float in accordance with some embodiments of the invention.
- FIG. 7 shows an isometric view of a float in accordance with some embodiments of the invention.
- FIG. 8 shows a cross-section view of a toilet cistern including a fluid valve assembly according to a further embodiment of the invention.
- FIG. 9 shows a cross-section view of the fluid valve assembly of FIG. 8 according to a further embodiment of the invention.
- FIG. 10 shows a partial perspective view of the fluid valve assembly of FIG. 8 according to a further embodiment of the invention.
- FIGS. 11 and 12 show a side cross-sectional views of the fluid valve assembly of FIG. 8 according to a further embodiment of the invention.
- FIG. 13 shows a side view of the fluid valve assembly of FIG. 8 according to a further embodiment of the invention.
- FIG. 1 showing a cross-section view of a toilet cistern assembly 1 that comprises a cistern 2 having a side wall 4 and a base 6 forming a tank capable of containing a fluid.
- Some embodiments of the invention include a side entry inlet pipe 8 that extends horizontally through the side wall 4 of the cistern 2.
- the side entry inlet pipe 8 can be connected to a domestic water supply by a user or installer of the toilet cistern assembly 1.
- the inlet pipe 8 includes a threaded outer surface 10.
- locking nuts 12 can be provided on the threaded inlet pipe 8 on opposing sides of the side wall 4.
- some embodiments include a first locking nut l2a that can be located on an external side of the cistern’s side wall 4, and a second locking nut l2b that can be located on an internal side of the cistern’s side wall 4.
- the locking nuts 12 can be tightened in opposing axial directions to clamp against the side wall 2 to secure the inlet pipe 8 to the cistern 2.
- the inlet pipe 8 may extend through the base 6 of the cistern 2.
- the arrangement may include only a single external nut, which tightens against the external side of the cistern’s side wall 4, and draws part of the fluid valve assembly into a clamped arrangement against the internal surface of the cistern 2.
- the toilet cistern assembly 1 includes a fluid valve assembly 14 that is connected to the inlet pipe 8 for controlling a flow of water from the inlet pipe 8 into the cistern 2.
- the fluid valve assembly 14 comprises a valve 16, a valve actuating assembly 18 capable of being actuated to open or close the valve 16, and an outlet assembly 20.
- the fluid valve assembly 14 further includes a float shroud 22 and a filling tube 24.
- the filling tube 24 is coupled to the float shroud 22. In the embodiment shown in FIG.
- the filling tube 24 is integrally molded with the float shroud 22 such that the tube 24 and shroud 22 form part of the same integral component.
- the filling tube 24 may be connected to but not necessarily integrally formed with the float shroud 22.
- Other embodiments can include those where the filling tube 24 is not directly connected to the float shroud 22.
- FIG. 2 shows a cross-section view of the fluid valve assembly 14 of FIG. 1 according to an embodiment of the invention.
- the valve 16 comprises a housing 26 having an inlet 28 connected to the inlet pipe 8.
- the housing 26 includes a main body 30 and a cap 32.
- the main body 30 includes a connector pipe 34 including the inlet 28 at one end, which connects to the inlet pipe 8.
- Some embodiments include an inlet chamber 36 located at the opposing end of the connector pipe 34. In some embodiments, the inlet chamber 36 is arranged vertically at 90 degrees to the connector pipe 34.
- the connector pipe 34 is in an open or fluid connection with the inlet chamber 36, and enters the inlet chamber 36 proximate its base 38.
- Some further embodiments include an outlet connector 40 that is located on the opposing side of the inlet chamber 36 to the connector pipe 34.
- the outlet connector 40 is not in open connection with the base of the inlet chamber 36, being partitioned from the inlet chamber 36 by the side wall 42 of the inlet chamber 36.
- the fill valve assembly 14 includes a diaphragm 44 located at the upper end 36a of the inlet chamber 36.
- the diaphragm 44 includes a sealing portion 46 that is configured and arranged to seat against the upper edge of the inlet chamber 36 to close the inlet chamber 36 and prevent fluid flow therethrough.
- the diaphragm 44 includes an outwardly extending skirt 45.
- the skirt 45 includes an upwardly extending rim 47 at its outer edge that locates within a corresponding groove in the cap 32. For example, in some embodiments, the skirt 45 can be clamped between the cap 32 and the main body 30, and the rim 47 is held and retained within the groove 49.
- the skirt 45 can seal against the outer edge of the groove 49 and can be urged and held in place by water pressure.
- the diaphragm 44 may include other sealing structures such as ribs, labyrinth seals, and other structures.
- the diaphragm 44 may comprise a polymer-based material including one or more homopolymers, one or more copolymers, or mixtures thereof.
- the material may comprise an elastomeric polymer such as rubber or silicone.
- the rubber may be a natural rubber (e.g., such as natural gum rubber), a synthetic rubber, or combinations thereof.
- the material may comprise a butyl or butylene rubber, ethylene propylene diene monomer (EPDM) rubber, neoprene rubber, nitrile rubber, silicone rubber, a polyurethane rubber, a fluoro-sibcone, chloroprene rubber, nitrile rubber, or combinations thereof.
- the material may include recycled rubber, a silicone sponge or foam or a polyurethane sponge or foam.
- At least a portion of the diaphragm 44 may comprise a polymer-based matrix material including one or more materials.
- some embodiments include a material that comprises one or more polymers infused with (or including a dispersion of) filler elements, filler compounds, and/or filler mixtures.
- at least a portion of the material can comprise a polymer-based matrix material including filaments or particles dispersed in a matrix to form a composite material.
- some embodiments may include a filler that can comprise a fibrous material. In some embodiments, at least a portion of the filler can be oriented in a preferred direction.
- the material can comprise a fiber-filled matrix material including natural or synthetic filaments dispersed in a matrix to form a fiber composite material.
- Some embodiments include a filler material at least partially dispersed through at least a portion of the material.
- the filler material can be amorphous or crystalline, organic or inorganic material.
- the particle size of the filler material can be in the micron range.
- at least some portion of the filler material can be sub-micron.
- at least a portion of the filler can comprise a nano-sized particle filler material.
- the float shroud 22 can comprise an elongate chamber 53 having side walls 48 and a base 50.
- the elongate chamber 53 can be open at its upper end 52.
- Some embodiments include an aperture 54 provided in the base 50 of the shroud 22 that can allow fluid to enter the chamber.
- the interior of the float shroud 22 can be in fluid communication with the body of the cistern 2, and the water level within the float shroud 22 can reach an equilibrium with a water level in the cistern 2.
- the fill valve assembly 14 includes a float 56 positioned within the float shroud 22.
- the float 56 and the float shroud 22 can be configured such that the float 56 is received within the float shroud 22 with a close sliding fit.
- the float 56 can be configured to slide axially in the vertical direction within the float shroud 22, with the side walls 48 of the float shroud 22 acting as a guide for the float 56.
- the float 56 can be connected to a push rod 58 which forms part of the valve actuating assembly 18 that can actuate the valve 16.
- the float 56 is formed of a molded plastic and includes a threaded channel or a channel including at least a threaded portion that is integrally molded into a side edge of the float 56.
- the channel can receive the threaded push rod 58, and the threaded engagement between the threaded portion of the channel and the push rod 58 can fix the float 56 to the push rod 58.
- rotation of the threaded push rod 58 relative to the float 56 can enable the position of the float 56 along the length of the push rod 58 to be adjusted. This varies the height at which the float 56 causes the push rod 58 to close the fluid valve assembly 14, and hence vary the full flush volume of the cistern 2.
- conventional non- threaded adjustment devices can be used.
- an upper end of the push rod 58 can be connected to a linkage 60.
- the linkage 60 can be arranged such that an upwards movement of the push rod 58 can cause an actuating portion of the linkage 60 to pivot downwardly (i.e., towards the float 56).
- the actuating portion of the linkage 60 can include one or more sealing members that can close a bleed vent in the cap 32 of the valve housing, which causes the sealing portion 46 of the diaphragm 44 to move into sealing engagement with the upper end of the inlet chamber 36 to close the inlet chamber 36 and prevent flow to the outlet assembly 20.
- movement of the push rod 58 in the downward direction can pull the linkage 60 downwards and cause an actuating portion of the linkage 60 to pivot upwardly which can uncover the bleed vent.
- This can cause the diaphragm 44 to move out of sealing engagement with the inlet chamber 36 under the action of the inlet water pressure, and allow flow to the outlet assembly 20.
- the float 56 includes a main body 164 having side walls 166 and an upper wall 168. In some embodiments, the float 56 is open at its base 169. In some embodiments, the float 56 includes a plurality of chambers 170 that are formed within the body 164 of the float 56 which are defined by partition walls 172 within the main body 164. In some embodiments, the float 56 chambers 170 are open at the base 169 and closed at the upper end by the upper wall 168. Therefore, in some embodiments, air pressure within the chambers 170 prevents water from entering the chambers 170 and maintains the buoyancy of the float 56.
- the outlet connector 40 can connect the inlet chamber 36 to the outlet assembly 20.
- the outlet assembly 20 is substantially cylindrical and includes an inner chamber 64 and an outer chamber 66.
- the inner chamber 64 and outer chamber 66 are concentric with the outer chamber 66 being arranged radially outwards of the inner chamber 64.
- the outer chamber 66 can define a fluid channel having an inlet 77 at its lower end and an outlet 79 at its upper end.
- the valve actuating assembly can include a channel defined by the outer chamber 66 is configured such that it extends around the inner chamber 64 in a coiled or spiral arrangement.
- the inner chamber 64 can include a cylindrical wall 68 forming a channel that is open at the upper and lower ends.
- the outer chamber 66 has an inner wall defined by the wall 68 of the inner chamber 64.
- the outer chamber 66 also includes an outer wall 70 that is radially spaced from the inner wall 68 with the chamber 66 being defined by the space between the inner wall 68 and outer wall 70.
- the outer wall 70 extends to a greater axial height than the inner wall 68 such that the upper edge of the outer wall 70 is located above the upper edge of the inner wall 68.
- the, outer chamber 66 also includes a base 72 that connects the outer wall 70 to the inner wall 68.
- the outlet connector 40 connects to the outer chamber 66 at the lowest point of the outer chamber 66, which is approximately level with the base of the inner chamber 64.
- the outlet connector 40 can be in fluid connection with the outer chamber 66 to supply fluid into the outer chamber 66.
- the base 72 of the outer chamber 66 winds upwardly around the outer circumference of the inner chamber 64 in a spiral arrangement with the height of the outer wall 70 decreasing as the base 72 spirals upwards; the vertical position of the upper edge of the outer wall 70 remains constant around its periphery while the vertical position of the lower edge increases with the increase in height of the spiral base 72.
- a cap 74 can be provided as shown to close the cylindrical upper end of the outer chamber 66, and thus enabling water flowing within the outer chamber 66 to flow inwardly and fall into the inner chamber 64 through the gap between the upper end of the inner chamber wall 68 and the cap 74.
- the spiral configuration of the outer chamber 66 can cause the water flowing through the outer chamber 66 to rotate around the inner chamber 64 as it flows upwardly to the upper edge of the inner chamber 64.
- water flows over the upper edge of the inner chamber 64 in a weir type arrangement.
- the rotational element of the flow can cause the water to spin as it falls down the outlet channel 64, which defines an outlet nozzle. Further, in some instances, the spin imparted to the flow can collimate the flow as it falls through the outlet channel 64, which may reduce one or both of noise from the outlet flow and nozzle spray.
- an aperture 76 can be formed centrally within the cap 74.
- the aperture 76 can comprise a smaller radius than the inner chamber 64.
- an inner lip 78 can extend downwardly from the aperture and can form a barrier wall which directs the water overflowing from the outer channel 66 downwardly into the inner channel 64 and prevents water spraying upwardly out of the aperture 76.
- the aperture 76 can enable air to flow into the outlet channel 64, which provides an anti-siphon feature. Specifically, in some embodiments, if a siphoning vacuum is created, air may be drawn into the outlet assembly 20 rather than the negative pressure acting to draw water from the cistern.
- the filling tube 24 can be located beneath the outlet assembly 20.
- the filling tube 24 can be arranged to catch free-falling water expelled from the outlet assembly 20, as indicated by arrow C shown in the illustration of FIGS. 1 and 3, enabling the water to flow down into the cistern 2, reducing noise and splash back.
- the filling tube 24 can include an elongate cylindrical body 80.
- the filling tube 24 can include a radially stepped mouth section 82 at its upper end that is wider than the main cylindrical body 80.
- Some embodiments include a tapered section 84 in the form of a truncated cone that connects the mouth portion 82 and the lower main body 80 and provides a transition between the two sections avoiding a stepped shelf that would lead to splash back from within the filling tube 24.
- the filling tube 24 is open at its upper and lower ends.
- the upper edge 86 of the filling tube 24 defines the opening to the filling tube 24 that is vertically spaced from the lower edge 88 of the outlet assembly 20 at which is located the outlet aperture 89, so that the outlet aperture 89 of the outlet assembly 20 is spaced from in the inlet aperture 87 of the filling tube 24.
- the upper edge 86 of the filling tube 24 is spaced from the lower edge 88 of the inner chamber 64 of the outlet assembly 20 which defines a fill nozzle.
- the outlet assembly 20 and filling tube 24 both include longitudinal axes extending along their lengths.
- the filling tube 24 and outlet assembly 20 can be arranged such that they are axially aligned, meaning that the longitudinal axis of the filling tube 24 is substantially aligned and substantially coaxial with the longitudinal axis of the inner chamber 64 of the outlet assembly 20. In some embodiments, this helps ensure that the stream of water falling from the outlet assembly 20 is also axially aligned with the filling tube 24, and as such flows directly into the filling tube 24. While it is not essential that the two elements are precisely axially aligned, the closer the alignment, the more likely it is that the stream of water from the outlet assembly 20 will fall directly into the filling tube 24 without contacting the walls thereby reducing noise and splash back from the filling tube 24.
- the upper edge 86 of the filling tube 24, at which is located at the inlet aperture 87 of the filling tube 24, is spaced from the lower edge 88 of the outlet assembly 20, at which is located the outlet aperture 89, by a distance A which defines the air gap between the two components.
- the outlet aperture 89 at the lower edge of the outlet assembly 20 is spaced from the surface of water in the cistern 2 by a distance B shown in FIG. 1. Further, the unobstructed air gap A ensures that if a siphoning effect is generated in the inlet pipe 8, air is drawn into the outlet assembly 20 through the air gap A.
- the air gap A is selected to define a safe gap A across which it is not possible to draw water from the cistern. In one embodiment the air gap A is at least about 20 mm. In another embodiment the air gap is at least about 25 mm.
- the outlet assembly 20 and filling tube 24 both form part of the fluid valve assembly 14. Both the outlet assembly 20 and filling tube 24 are connected as part of the fluid valve assembly 14 such that they are fixed in position relative to each other. This enables the air gap A to be fixed during manufacture and hence avoids the need for an installer to have to set the air gap during installation. As well as simplifying installation, the fixed air gap A ensures that the fluid valve assembly 14 is compliant with regulations regardless of the standard of installation.
- the fluid valve assembly 14 including the outlet assembly 20 and filling tube 24 can be manufactured as a prefabricated and preassembled component that requires little or no assembly on site.
- a fluid valve assembly 15 can include a variable buoyancy float 256 in place of the float 56.
- some or all of the other components of the fluid valve assembly 15 can comprise those of fluid valve assembly 15. In some other embodiments, one or more of the components may differ or not be included.
- the variable buoyancy float 256 can comprise a main body 264 having side walls 266 and an upper wall 268. In some embodiments, the variable buoyancy float 256 is open at its base 269. In some embodiments, a plurality of chambers 270 are formed within the body 264 of the variable buoyancy float 256 which are defined by partition walls 272 within the main body 264.
- the chambers 270 are open at the base 269 and closed at the upper end by the upper wall 268. Therefore, in some embodiments, the air pressure within the chambers 270 prevents water from entering the chambers 270 and maintains the buoyancy of the variable buoyancy float 256.
- one of the chambers 274 is provided with an aperture 276 formed in the upper wall 268 which defines an air bleed aperture 278 allowing air to enter and exit the chamber 274.
- the air bleed aperture 278 includes a spigot 280 formed on and extending upwardly from the upper wall 268 having the aperture 276 extending therethrough.
- the presence of the air bleed aperture 278 in the chamber 274 means that in operation, air can exit the chamber 274, which allows water to enter the chamber 274 during filling while the remaining chambers 270 remain filled with air.
- FIG. 5 shows an operational arrangement of the fluid valve assembly 15 in which the cistern 2 is filled to the full flush volume and the water inlet 8 has been closed by the fluid valve assembly 15.
- the float shroud 22 can fill with water to the same level as the water level within the cistern 2.
- the chamber 270 can contain no water due to the air pressure within the chamber 270 and the fact that the chamber 270 is closed at its upper end (bounded by upper wall 268).
- the chamber 274 has filled with water up to the same level as the float shroud 22 and the cistern 2 (marked by fill line 3).
- the volume of air evacuated from the chamber 274 reduces the overall volume of the air within the variable buoyancy float 256, and consequently, the buoyancy of the variable buoyancy float 256 decreases.
- Some operational conditions of the fluid valve assembly 15 can include a partial- flush condition. For example, in some embodiments, during a partial flush operation, the water level in the cistern 2 falls, as does the water level in the shroud 22. In some instances, during operation, at its lowest level, the water level can remain above the base 269 of the variable buoyancy float 256. In addition, in some embodiments, the size of the aperture 276 can limit the rate at which air is able to re-enter the chamber 274 as the water level in the shroud 22 and cistern 2 falls.
- the water level in the cistern 2 falls to a level below the lower edge 50 of the float shroud 22 and below the base 269 of the variable buoyancy float 256. Once the water level falls below the base 269 of the float 256, the water in the chamber 274 begins to drain out. The rate at which the water drains is limited by the flow of air into the aperture 276, but the period between the water level falling below the base 269 of the float and then rising to this level again during filling is more than sufficient for the chamber 274 to empty fully. In some embodiments, the float shroud 22 also empties fully in this period.
- the shroud 22 begins to fill with a normal level of lag behind the cistern 2 level.
- the variable buoyancy float 256 when the water level in the shroud 22 reaches the variable buoyancy float 256, the variable buoyancy float 256 is in a fully buoyant state and rises at the faster rate. Although some water may enter the chamber 274 as the variable buoyancy float 256 rises, the variable buoyancy float 256 remains substantially fully buoyant as it rises to a valve shut-off position. In some embodiments, once the variable buoyancy float 256 reaches this position and stops rising, the water level continues to rise within the chamber 274 due to the lag cause by the small diameter of the aperture 276.
- the chamber 274 fills to the same level as the shroud 22 and cistern 256 and the variable buoyancy float 256 is then ready to accommodate a full or partial-flush with the water level returning to the same full-flush volume regardless of the previously selected flush operation.
- some embodiments include a float 356 that includes a main body 364 having an outer side wall 366, an upper wall 368 and an inner wall 371.
- the float 356 is open at its base end 369.
- the inner wall 371 defines a central channel 373 extending axially through the float 356 that is open at both ends.
- the central channel 373 is configured to receive the fill tube 324 to locate the float 356 around the fill tube 324.
- a plurality of chambers 370 are formed within the body 364 of the float 356 which are defined by partition walls 372 which segregate the internal volume of the main body 364.
- the plurality of chambers 370 are open at the base end 369 and closed at the upper end by the upper wall 368.
- the float 356 includes a channel 380 integrally molded into the side wall 366 of the main body 364.
- the channel 380 is substantially circular in cross-section and has an open channel 382 extending along its outer edge 384 configured such that the channel 380 is substantially “C”-shaped.
- a threaded portion 386 is located at the upper edge of the channel 380.
- the channel 380 is configured to axially receive the push rod 58 which engages with the threaded portion 386.
- the“C”-shape of the channel 380 allows it to extend around a substantial portion of the circumference of the push rod 358, and more than 380 degrees, which enables it to retain the push rod 58 within the channel 380 which acts as a guide.
- a concave scalloped channel 390 extends axially along the length of the opposing side.
- the float shroud 22 includes a corresponding convex axially extending internal ridge that can cooperate with the scalloped channel 390 to guide the float 356 during axial movement within the shroud 22.
- the buoyancy variation chamber 374 is provided with an aperture 376 formed in the upper wall 368 which defines an air bleed aperture 378 allowing air to enter and exit the buoyancy variation chamber 374.
- the air bleed aperture 378 includes a spigot 389 formed on and extending upwardly from the upper wall 368 having the aperture 376 extending therethrough.
- some further embodiments of the invention include a toilet cistern assembly 401 comprising a cistern 402 having side walls 404 and a base 406 forming a tank capable of retaining a fluid.
- the toilet cistern assembly 401 includes a bottom entry support tube 408 that extends vertically through the base 406 of the cistern 402.
- the bottom entry support tube 408 can be connected to the domestic water supply.
- the support tube 408 functions as an inlet pipe for cistern 402 and functions to provide fluid to the cistern 402 when coupled to a fluid supply.
- the support tube 408 includes a threaded outer surface 410 at its lower end 408a that extends through an aperture 407 in the base 406 of the cistern 402.
- locking nuts 412 are provided on the threaded support tube 408 on opposing sides of the base 406.
- some embodiments include a first locking nut 4l2a located on the external side 406a of the cistern base 406, and a second locking nut 4l2b is located on the internal side 406b of the base 406.
- the locking nuts 4l2a, 4l2b can be tightened in opposing axial directions to secure the support tube 408 to the base 406 such that it extends substantially vertically into the cistern 402.
- the fluid valve assembly 414 can be connected to the support tube 408.
- the support tube 408 can provide the function of holding and supporting the fluid valve assembly 414 in position within the cistern 402.
- the fluid valve assembly 414 can comprise a valve 416 for controlling the flow of water from the support tube 408 into the cistern 402.
- the fluid valve assembly 414 further includes a valve actuator 418 for controlling or actuating the valve 416, and an outlet assembly 420 from which water flows into the cistern 402 from the support tube 408.
- the valve 416 can comprise a housing 426 having an inlet 428 in fluid connection with the support tube 408.
- the housing 426 includes a main body 430 and a cap 432.
- the main body 430 includes a connector pipe 434 including the inlet 428 positioned at its lower end.
- a diaphragm seal is located at the upper end of the connector pipe 434.
- an outlet connector 440 is located downstream of the connector pipe 434 on the opposing side of a sealing portion 446 of a diaphragm 444.
- the sealing portion 446 is configured and arranged to seat against the upper edge 448 of the connector pipe 434 to close the connector pipe 434 and prevent fluid flow therethrough.
- the fluid valve assembly 414 further includes a float shroud 422 and a filling tube 424.
- the float shroud 422 comprises an elongate hollow chamber 423 having side walls 449 and a base 450.
- the chamber 423 is open at its upper end 452.
- the aperture 454 is provided in the base 450 of the float shroud 422 that can allow fluid to enter the chamber 423 of the float shroud 422.
- the interior of the float shroud 422 (chamber 423) can be in fluid communication with the body of water in the cistern 402, and the water level within the flout shroud 422 can reach an equilibrium with the water level in the cistern 402.
- a float 456 is housed within the float shroud 422, where the float 456 and the float shroud 422 are configured such that the float 456 is received within the float shroud 422 with a close sliding fit.
- the float 456 is configured to slide axially in a vertical direction within the float shroud 422, with the side walls 449 of the float shroud 422 acting as a guide for the float 456.
- the float 456 may be suspended directly in the body of water of the cistern, without a float shroud.
- the float 456 is connected directly to a threaded valve actuator, and threaded adjustment of the float up and down the actuator varies the water height in the cistern 402.
- the float 456 can be connected to the vertical push rod 458 which forms part of the valve actuating assembly 418.
- the float 456 can be formed of a molded plastic.
- the float 456 can include a threaded channel or a channel 459 including at least a threaded portion that is integrally molded into a side edge of the float 456. In this instance, the channel 459 receives the threaded push rod 458 and the threaded engagement between the threaded portion of the channel 459 and the push rod 458 fixes the float 456 to the push rod 458.
- rotation of the threaded push rod 458 relative to the float 456 can enable the height of the float 456 along the length of the push rod 458 to be adjusted, to vary the height at which the float 456 causes the push rod 458 to close the valve 414, and hence vary the full flush volume of the cistern 402.
- FIG. 10 showing a partial perspective view of the fluid valve assembly 414 of FIG. 8, at its upper end, the push rod 458 is connected to a linkage 460.
- the linkage 460 is arranged such that an upwards movement of the push rod 458 can cause an actuating portion of the linkage 460 to pivot downwardly (i.e. towards the float shroud 422). In some embodiments, this causes the sealing portion 446 of the diaphragm 444 to move into sealing engagement with the upper end of the connector pipe 434, which closes the connector pipe 434 and prevents fluid flow to the outlet assembly 420.
- the outlet connector 440 connects the connector pipe 434 to the outlet assembly 420.
- the outlet assembly 420 is substantially cylindrical and includes an inner chamber 464 and an outer chamber 466.
- the inner chamber 464 and outer chamber 466 are concentric with the outer chamber 466 being arranged radially outwards of the inner chamber 464.
- the outer chamber 466 defines a fluid channel having an inlet 477 at its lower end and an outlet 479 at its upper end. The channel defined by the outer chamber 466 is configured such that it extends around the inner chamber 464 in a coiled or spiral arrangement.
- the inner chamber 464 includes a cylindrical wall 468 forming a channel that is open at the upper and lower ends as described.
- the outer chamber 466 has an inner wall defined by the wall 468 of the inner chamber 464.
- the outer chamber 466 also includes an outer wall 470 that is radially spaced from the inner wall 468 with the chamber 466 being defined by the space between the inner wall 468 and outer wall 470.
- the outer wall 470 extends to a greater axial height than the inner wall 468 such that the upper edge of the outer wall 470 is located above the upper edge of the inner wall 468.
- the outer chamber 466 also includes a base 472 that connects the outer wall 470 to the inner wall 468.
- the outlet connector 440 connects to the outer chamber 466 at the lowest point of the outer chamber 466, which is approximately level with the base of the inner chamber 464.
- the filling tube 424 can be located beneath the outlet assembly 420.
- the filling tube 424 is arranged to catch free-falling water expelled from the outlet assembly 420, as indicated by arrow C. In this instance, the water passes down into the lower end of the cistern 402, reducing noise and splash back.
- the filling tube 424 includes an elongate cylindrical channel 480 that extends through the float shroud 422.
- the filling tube 424 includes a radially stepped mouth section 482 at its upper end that is wider than the main cylindrical channel 480.
- a tapered section 484 in the form of a truncated cone connects the mouth portion 482 and the lower portion of the elongate cylindrical channel 480 and provides a funneled transition between the two sections avoiding a stepped shelf that would lead to splash back from within the filling tube 424.
- the filling tube 424 is open at its upper and lower ends, and the upper edge 486 of the filling tube 424 defines the opening to the filling tube 424.
- This upper edge 486 is vertically spaced from the lower edge 488 of the outlet assembly 420 which is located at outlet aperture 489, so that the outlet aperture of the outlet assembly 420 is spaced by an air gap from inlet aperture 487 of the filling tube 424.
- the upper edge 486 of the filling tube 424 can be spaced from the lower edge 488 of the inner chamber 464 of the outlet assembly 420 which defines the fill nozzle.
- the upper edge 486 of the filling tube 424, at which is located the inlet aperture 487 of the filling tube 424, is spaced from the lower edge 488 of the outlet assembly 420, where the outlet aperture 489 is located, by a distance A which defines the air gap between the two components.
- the outlet aperture 489 at the lower edge of the outlet assembly 420 can be spaced from the surface of the water by a distance B.
- the clear, visible and unobstructed air gap A ensures that if a siphoning effect is generated in the inlet pipe, air is drawn into the outlet assembly 420 through the air gap A.
- the air gap A is selected to define a safe gap A across which it is not possible to draw water from the cistern.
- the air gap A is at least 5 mm, preferably more than 10 mm and yet more preferably at least 20 mm. In other embodiments, the air gap is at least 25 mm.
- the outlet assembly 420 and filling tube 424 both include longitudinal axes extending along their lengths.
- the filling tube 424 and outlet assembly 420 can be arranged such that they are axially aligned, meaning that the longitudinal axis of the filling tube 424 is aligned and coaxial with the longitudinal axis of the inner chamber 464 of the outlet assembly 420. This ensures that the stream of water falling from the outlet assembly 420 is also axially aligned with the filling tube 424, and as such flows directly into the filling tube 424.
- the filling tube 424 is integrally formed as part of the float shroud 422 and extends vertically through the float shroud 422.
- the cylindrical channel 480 of the filling tube 424 defines an inner wall of the float shroud 422 and is connected at its base to the annular base 450 of the float shroud 422.
- the float 456 includes a main body 484 having an outer side wall 484a, an upper wall 488 and an inner wall 490.
- the float 456 is open at its base.
- the inner wall 490 of the float 456 defines a central channel 491 extending axially through the float 456 that is open at both ends.
- the central channel 491 is configured to receive the filling tube 424 and to locate the float 456 around the filling tube 424.
- the cylindrical channel 480 of the filling tube 424 extends through the central channel 491 of the float 456 such that the float is located radially outwards of the tube body 480, extending around the circumference thereof with a substantially toroidal form.
- the tube body 492 therefore acts as a guide for the float 456 which slides up and down about the central tube 491 within the float shroud 422.
- the outlet assembly 420, float shroud 422 and filling tube 424 form part of the fluid valve assembly 414.
- the outlet assembly 420 and filling tube 424 are connected as part of the fluid valve assembly 414 such that they are fixed in position relative to each other. This enables the air gap A to be fixed during manufacture and hence avoids the need for an installer to have to set the air gap during installation. As well as simplifying installation, the fixed air gap A ensures that the fluid valve assembly 414 is compliant with regulations regardless of the standard of installation.
- the fluid valve assembly 414 can be manufactured as a prefabricated and preassembled component that requires little or no assembly on site.
- the fluid valve assembly 414 is connected to the support tube 408 such that the vertical position of the fluid valve assembly 414 along the length of the support tube 408, and hence the height of the fluid valve assembly 414 relative to the base 406 of the cistern 402, can be adjusted while the fluid valve assembly 414 remains in open fluid connection with the support tube 408.
- the fluid valve assembly 414 includes a connector tube 494 extending vertically downwards from the fluid valve assembly 414.
- the connector tube 494 connects to the float shroud 422, filling tube 424, and the housing 426 of the valve 416. Accordingly, the position of the outlet assembly 420 and filling tube 424 are fixed due to their connection via the connector tube 494.
- the connector tube 494 has an inner diameter substantially equal to the outer diameter of the upper end 496 of the support tube 408. In this way the connector tube 494 is configured to slidably receive the upper end 496 of the support tube 408.
- the upper end 496 of the support tube 408 includes a pair of parallel circumferential grooves 498 formed in the outer surface of the support tube 408 proximate the distal end.
- o-ring seals 500 can be located in the circumferential grooves 498. In some embodiments, the o-ring seals 500 can provide a seal between the inner surface 501 of the connector tube 494 and the outer surface 505 of the support tube 408 that prevents fluid from flowing out of the lower end of the connector tube 494 between the connector tube 494 and the support tube 408. In some embodiments, the o-ring seals 500 can maintain a seal between the support tube 408 and connector tube 494 as the support tube 408 slides within the connector tube 494.
- the length of the support tube 408, and the position of the o-rings 500 along the support tube 408 can be selected such the o-rings 500, and hence the seal between the support tube 408 and the connector tube 494, is above the filled water level within the cistern.
- the support tube 408 can include a series of circumferential protrusions or annular ribs 502 arranged along a locking section 503 of the support tube 408 that is axially spaced from the distal end of the support tube 408.
- the ribs 502 can extend radially outwards from the outer surface 505 of the support tube 408, and are axially and regularly or irregularly spaced from each other along the length of the locking section 503 of the support tube 408.
- the ribs 502 can be interspaced by a series of recesses 504.
- the inner surface 501 of the connector tube 494 can comprise a pair of annular, axially spaced protrusions forming locking teeth 506.
- locking teeth 506 can be arranged proximate the lower end of the connector tube 494 at its opening.
- a recess 506a can be defined between the locking teeth 506 that is sized and configured to receive the ribs or protrusions 502 of the support tube 408.
- the connector tube 494 includes a plurality of expansion channels or slots 508 extending axially and including an opening 509 at the lower edge 511 of the connector tube 494.
- the expansion slots 508 can allow the lower end of the connector tube 494 to radially expand or splay outwardly.
- the expansion slots 508 extend upwardly from the lower edge 511 of the connector tube 494 and terminate at a position axially spaced above the locking teeth 506 (shown in FIG. 9 and described earlier).
- the expansion slots 508 can extend through the locking teeth 506 creating a circumferential break.
- the locking teeth 506 extend circumferentially around the inner surface 501 of the connector tube 494 but do not extend across the gaps defined by the expansion slots 508.
- the presence of the expansion slots 508 can enable the lower end of the connector tube 494 to radially expand to enable the locking teeth 506 to travel over the ribs 502 of the support tube 408. In some embodiments, this can enable the connector tube 494 to be axially moved relative to the support tube 408.
- the locking teeth 506 have tapered leading and trailing edges in the axial direction to allow them to slide over the ribs 502.
- the ribs 502 can include tapered leading and trailing edges, where the uppermost edge of each rib 502 defines the leading edge.
- the o-ring seals 500 can ensure that the seal between the connector tube 494 and support tube 408 is maintained during axial adjustment.
- the ribs 502 define series of axial locking positions, where with each locking position, the locking teeth 506 resiliently flex back to their original radial position and locate either side of the ribs 502 corresponding to the locking position and locate within the recesses 504 axially either side of the rib 502. In this configuration, the connector tube 494 may be further axially adjusted by applying a force in either axial direction.
- a locking collar 510 is provided to axially lock the connector tube 494 in a selected locking position relative to the support tube 408.
- the locking collar 510 is substantially cylindrical and is positioned at least partially around the connector tube 494.
- the body 512 of the locking collar 510 is integrally molded with the float shroud 422, and connects the float shroud 422 to the connector tube 494.
- the locking collar 510 has an inner diameter corresponding to the outer diameter of the connector tube 494 and is configured such that the connector tube 494 and locking collar 510 are able to slide relative to each other.
- the locking collar 510 has a locking ring 512 at its lower end defined by a region of increased wall thickness. It will be appreciated that in other embodiments the locking collar may be separate from the float shroud, and as described above in certain embodiments the float could be provided without a float shroud 422.
- the locking collar 510 is in a locked position, where the locking collar 510 has been moved to its lowermost axial position at the lower end 511 of the connector tube 494.
- the connector tube 494 includes a flange portion 514 at the lower end 511 that is structured to create a stop to define the lower position limit of the locking collar 510.
- the locking ring 512 of the locking collar 510 can be axially aligned with the locking teeth 506 of the connector tube 494.
- the inner diameter of the locking collar 510 corresponds to the normal, unexpanded diameter of the connector tube 494.
- the locking collar 510 when located about the lower end of the connector tube 494 in the locking position, can radially restrict the connector tube 494, and prevent the lower end of the connector tube 494 from radially expanding.
- the expansion of the connector tube 494 can enable the locking teeth 506 to splay outwardly and move axially over the locking ribs 502.
- the locking collar 510 therefore locks the connector tube 494 with the locking teeth 506 located in position about the corresponding locking rib 502 by preventing the locking teeth 506 from moving axially over the locking ribs 502. This creates a mechanical interlock between the locking teeth 506 and the locking rib 502 that holds the connector tube 494 in the selected locking position.
- an increased thickness of the locking ring section 512 can strengthen the locking collar 510 at the region of maximum radial stress.
- low profile rib 513 is provided on the outer surface of the connector tube 494 at a position in which it is axially substantially level with the upper edge of the locking ring 512 in the locked position.
- the rib 513 can provide a mechanical feedback as the locking ring 512 passes over the rib 513 that indicates to the user that the lower locking position has been reached.
- the connector tube 494 can be inserted over the support tube 408 and moved to the required axial locking position.
- the locking collar 510 can be moved to the locking position to lock the connector tube 494 in position and fix the height of the fluid valve assembly 414.
- the locking position also corresponds to the lowermost position of the filling tube 424.
- the flange portion 514 can set the air gap between the outlet assembly 420 and the filling tube 424 by fixing the axial spacing between the outlet assembly 420 and the filling tube 424. Accordingly, the air gap is therefore easily, consistently and accurately set during installation in some embodiments.
- the height of the fluid valve assembly 414 can be adjusted by moving the locking collar 510 to an unlocked position, as shown in FIG. 12.
- the locking collar 510 can moved axially upwards away from the lower end 511 of the connector tube 494 to the unlocked position in which the locking ring 512 is axially spaced above the locking teeth 506.
- a lug 516 can be located on the connector tube 494 immediately beneath the valve 416.
- an upper flange section 518 projects radially outwards from the upper end of the locking collar 510 that may be gripped by the user to pull the locking collar upwards.
- the flange section 518 includes a movable release tab 520.
- the tab 520 in an uppermost position, can engage the lug 516 which acts as a stop member to limit upward movement of the locking collar along the connector tube 494.
- the connector tube 494 is once again able to axially expand and the position or height of the connector tube 494 adjusted.
- a water supply can be connected and the support tube 408 and connector tube 494 can fill with water.
- connector tube 494 can be provided with locking tabs 524 to prevent accidental removal of the connector tube 494 from the support tube 408.
- locking tabs 524 can be located above the locking teeth 506 on opposing sides of the connector tube 494, and can be pivotable and radially movable relative to the main body of the connector tube 494.
- support tube 408 includes guide channels 526 formed on opposing sides of its outer surface within which the locking tabs 524 are received. In some embodiments, guide channels 526 can terminate a short distance from the upper end of the support tube 408.
- locking tabs 524 can be axially restrained by the locking collar 510 which holds the locking tabs 524 in an inwardly depressed state as received within the channels 526 of the support tube 408. In some embodiments, if the user attempts to pull the connector tube 494 past an upper most position, the locking tabs 524 can engage with the upper ends of the channels 526 to prevent further retraction. In this position, the locking ring 512 can prevent release of the locking tabs 524, and the locking collar cannot be moved past the locking tabs 524 due to the engagement of the release tab 520 with the lug 516.
- the release tab 520 can be pivotable relative to the locking collar 510, and may be pivoted outwardly to a release position. In some embodiments, in the release position, the release tab 520 can move axially past the lug 516 allowing further axial travel of the locking collar 510. This additional travel is sufficient to allow the locking ring 512 to move past the locking tabs 524 allowing them to retract and release from the guide channels 526. In use, once the user is certain that removal of the connector tube 494 and fluid valve assembly 414 is required, the supply water can be turned off and the locking collar 510 pulled upwardly to the unlocked position.
- the connector tube 494 may then be pulled upwardly until the locking tabs 524 engage the upper ends of the channels 526 and further movement is not possible. The user may then pull the release tab 520 outwardly to allow the locking ring 512 to release the locking tabs 524, and the connector tube 494 may then be fully removed from the supply tube 408.
- protrusions, grooves, recesses, teeth, tabs and slots are used to define structures that enable engagement, and these terms are used generically throughout to define a first structure that engages, couples, and/or interlocks with at least a second structure.
- engagement is contemplated broadly to mean two or more structures being engaged, coupled, and/or interlocked via a friction mechanism.
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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)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1808145.5A GB2575771B (en) | 2018-05-18 | 2018-05-18 | A Float Assembly For A Toilet |
GB1808142.2A GB2573818B (en) | 2018-05-18 | 2018-05-18 | A Fluid Valve Assembly For a Water Storage Tank |
GB1808147.1A GB2573820B (en) | 2018-05-18 | 2018-05-18 | A Fluid Valve Assembly For A Toilet Cistern |
PCT/US2019/033137 WO2019222744A1 (en) | 2018-05-18 | 2019-05-20 | Fluid valve systems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3794184A1 true EP3794184A1 (en) | 2021-03-24 |
EP3794184A4 EP3794184A4 (en) | 2022-02-23 |
Family
ID=68539605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19803334.2A Pending EP3794184A4 (en) | 2018-05-18 | 2019-05-20 | Fluid valve systems |
Country Status (2)
Country | Link |
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EP (1) | EP3794184A4 (en) |
WO (1) | WO2019222744A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2382500A (en) | 1943-09-11 | 1945-08-14 | Jesse C Owens | Antisiphon ball cock valve |
US2581043A (en) * | 1945-05-08 | 1952-01-01 | Jesse C Owens | Antisiphon silencer for ball cocks |
US2642081A (en) * | 1951-05-08 | 1953-06-16 | John Flam | Float mechanism for controlling flush tank valves |
US3386459A (en) * | 1964-02-05 | 1968-06-04 | American Standard Inc | Flushing apparatus |
US3994313A (en) * | 1975-02-20 | 1976-11-30 | Brandelli Anthony R | Toilet bowl valve |
GB1467203A (en) * | 1975-04-09 | 1977-03-16 | Rost Soehne G | Inlet fitting for a water cistern |
US5255703A (en) * | 1992-07-08 | 1993-10-26 | Johnson Dwight N | Float operated fill valve |
US5715859A (en) * | 1996-10-02 | 1998-02-10 | Hunter Plumbing Products | Adjustable fill valve assembly |
US6755209B2 (en) * | 2002-06-13 | 2004-06-29 | Geberit Technik Ag | Fill valve assembly for a flush tank |
US8166997B2 (en) * | 2007-09-27 | 2012-05-01 | Toto, Ltd | Toilet flush water supply device |
CN201883503U (en) * | 2010-11-11 | 2011-06-29 | 李飞宇 | Water inlet structure of water storage floating barrel |
CN102466045B (en) * | 2010-11-11 | 2013-11-06 | 李飞宇 | Closestool water inlet valve and control method thereof |
-
2019
- 2019-05-20 WO PCT/US2019/033137 patent/WO2019222744A1/en active Application Filing
- 2019-05-20 EP EP19803334.2A patent/EP3794184A4/en active Pending
Also Published As
Publication number | Publication date |
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WO2019222744A1 (en) | 2019-11-21 |
EP3794184A4 (en) | 2022-02-23 |
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