EP0842334B1 - Flush valve - Google Patents

Flush valve Download PDF

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Publication number
EP0842334B1
EP0842334B1 EP96925598A EP96925598A EP0842334B1 EP 0842334 B1 EP0842334 B1 EP 0842334B1 EP 96925598 A EP96925598 A EP 96925598A EP 96925598 A EP96925598 A EP 96925598A EP 0842334 B1 EP0842334 B1 EP 0842334B1
Authority
EP
European Patent Office
Prior art keywords
valve
float
movable
valve arrangement
arrangement according
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.)
Expired - Lifetime
Application number
EP96925598A
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German (de)
English (en)
French (fr)
Other versions
EP0842334A1 (en
EP0842334A4 (en
Inventor
Joseph Robin Orbell
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.)
Individual
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Individual
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Filing date
Publication date
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Publication of EP0842334A1 publication Critical patent/EP0842334A1/en
Publication of EP0842334A4 publication Critical patent/EP0842334A4/en
Application granted granted Critical
Publication of EP0842334B1 publication Critical patent/EP0842334B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E03D1/02—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
    • E03D1/144—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with flushing valves having a single flush outlet and an additional float for delaying the valve closure
    • 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
    • E03D1/302—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 with valves kept in open position by means of air or water pressure or by vacuum

Definitions

  • the present invention relates generally to valves, in one aspect particularly to valves which are immersed in the fluid the flow of which the valves control, and in another aspect particularly to valves for controlling the flow of fluids through the valve. More particularly, the present invention relates to valves for controlling the flow of liquids, particularly water. Even more particularly, the present invention relates to valves suitable for use in cisterns for flushing toilet bowls and the like, such as flushing valves, particularly dual flushing valves, located in cisterns for controlling release of water from the cistern.
  • the present invention finds particular application as the dual flush cistern valve having two modes of operation in cisterns located in buildings such as office blocks, hotels, domestic houses or the like.
  • a problem associated with currently used valves in cisterns is that they are bulky and complex which results in large amounts of space being occupied by the valve in the cistern, particularly the operating mechanism of the valves. This in turn requires that the cistern be of large size. Large size cisterns reduce the places in which the cistern may be located within a building, and reduce the flexibility of stylists in designing the cistern and the room in which the cistern is to be located.
  • Another problem associated with single flush valves is that they waste water since they have no provision for reducing the amount of water used during a flush even when it is not required.
  • valves more or less continually drip water or allow water to leak from the cistern, particularly into the toilet bowl, with accompanying unwanted noise, including the annoying hissing noise as the cistern is being continually replenished with water as the valve oscillates between a partially opened position and a closed position.
  • unwanted noise including the annoying hissing noise as the cistern is being continually replenished with water as the valve oscillates between a partially opened position and a closed position.
  • continual leaking of the cistern results in unsightly staining of the toilet bowl.
  • Prior art document BE-A-829665 discloses a valve arrangement for use in a toilet cistern which allows either partial discharge or substantially full discharge of the toilet cistern.
  • the valve arrangement comprises: a lower valve tube which is constrained for vertical axial movement and being sealingly engageable at its lower end, at a diameter greater than the outer diameter of the lower valve tube, with the exit duct to the toilet cistern; and an upper valve tube which is also constrained for vertical axial movement and which is sealingly engageable at its lower end, at a diameter greater that the outer diameter of the upper valve tube, with the upper end of the lower valve tube.
  • valve tubes are linked such that an initial upwards displacement of the upper valve tube breaks the seal between the two tubes, thus allowing water from the cistern to partially discharge through the lower valve tube, and further upwards displacement of the upper valve tube also breaks the seal between the lower valve tube and the exit duct allowing water to substantially fully discharge through the duct.
  • Each valve tube is provided with a radially extending flange against which a co-axially constrained float exerts an upwardly directed buoyancy force when the water level in the cistern is above the float.
  • the downward pressure force acting on each valve tube due to the water in the cistern acting on the difference in diameter between the seal and outer diameter of the tube, is greater than the upwardly directed buoyancy force exerted on the flange of the float.
  • the downward pressure force reduces below the upwardly directed buoyancy force and the valve tube is maintained in its upward discharge position, until the water level falls, reducing the upwardly directed buoyancy force, and allowing the lower end of the tube to sealingly engage the duct or the upper end of the lower valve tube.
  • valve arrangement suitable for use in a cistern, such as a flushing valve, particularly a dual flush cistern valve, which is efficient in operation, made from a reduced number of components, occupies a minimum of space, is silent or almost so in operation, yet is effective in operation, and requires little or no maintenance as well as being inexpensive to build.
  • Dual flushing valves are characterised as having two outlets corresponding to two modes of flushing, one being known as a half flush in which a lesser amount of water is discharged to the toilet, and the other being known as a full flush in which almost the entire content of the cistern is discharged to the toilet bowl.
  • Flushing valve 2 comprises a main framework 4 which is securely attached internally within a cistern by suitable means (not shown).
  • Framework 4 comprises a lower horizontal bracket 6 which can be securely fixed to the base or lower surface 7 of the cistern and which assists in securely fixing frame 4 in place.
  • Bracket 6 is provided with a circular aperture for receiving a lower portion of a flushing tube (to be described in more detail later) which is located directly above the outlet 9 of the cistern by a suitable fastening means such as a threaded tube and nut arrangement 11.
  • Frame 4 further comprises a pair of horizontally spaced apart vertically extending members 8 and an upper support bracket 10 located at or towards the top of vertical members 8 for interconnecting the members 8.
  • a cap 13 is provided at the top of bracket 10 between vertical members 8.
  • Upper support bracket 10 is also provided with a circular opening for receiving the upper end of an upper flushing tube.
  • a first movable valve member in the form of a hollow cylindrical tube 14 being open at either end and acting as an upper flushing tube is received in the circular opening of support bracket 10.
  • Upper tube 14 is free to move axially in bracket 10 between a fully closed position and one of the open flushing positions.
  • Upper tube 14 is provided with upper ring or collar 16 located around its circumference intermediate its ends. Ring 16 may take any suitable profile and be made from any suitable material.
  • Upper tube 14 co-operatively interacts with lower tube 18.
  • the lower end of tube 14 is shown in phantom in Figure 1 to reveal the internal details of the sealing arrangement 17 between the lower end of upper tube 14 and the upper end of lower tube 18.
  • the sealing arrangement 17 comprises a substantially V-shape seal or tapered-edged seal 19 provided around the circumference of the upper edge of lower tube 18 so that the lower edge of upper tube 14 is received in the seal to seal the two tubes together and prevent ingress of water internally into the tubes during use when in the fully closed position and the fully opened position.
  • the lower tube 18 acting as a second movable valve member is arranged in end to end aligned relationship with upper tube 14.
  • a lower ring or collar 22 is provided circumferentially around the outside of lower tube 18 intermediate the ends.
  • the lower end of tube 18 is provided with a seal arrangement 20.
  • Seal arrangement 20 is additionally received within bracket 6 and is mounted directly above the outlet 9 of the cistern as is lower tube 18.
  • Seal arrangement 20 is provided with a substantially V-shaped seal or tapered-wall seal 21 in which the lower edge of lower tube 18 is received for sealing the cistern against outflow of water in the fully closed position.
  • a central rod 26 is located axially within the aligned upper and lower tubes 14, 18 and extends beyond the ends of both tubes at either end.
  • Rod 26 is maintained in place by being received through centrally located apertures 27, 29 of spiders 28, 30 located at or towards the upper end of upper tube 14 and the lower end of lower tube 18 respectively.
  • Spiders 28, 30 may be formed integrally with the tubes 14, 18 or may be made separately and assembled with the tubes.
  • Actuating lever 32 is connected at one end to central rod 26 and at the other end to push rod 33 to effect movement of central rod to effect full flush of the valve in which the valve is in the fully opened position.
  • the other end of push rod 33 is connected to full flush button or similar (not shown) provided on the cistern.
  • Actuating lever 36 is connected at one end to the top of spider 38 and at the other end to push rod 37 to effect movement of upper tube 14 to effect half flush of the valve in which the valve is only half opened by tubes 14 and 18 being separated from each other.
  • the other end of push rod 37 is connected to half flush button (not shown) or similar provided at a convenient remote location on the cistern.
  • An upper float 40 is pivotally connected to frame 4 at or towards the upper end of vertical member 8 by means of a pivot pin 42 or similar.
  • a lower float 44 is pivotally connected to framework 4 at a position intermediate the ends of frame member 8 but located more towards the lower end by a pivot pin 46 or similar.
  • Upper and lower floats 40, 44 are free to pivot between two different operating positions, one position being the fully closed position adopted when the cistern is full of water and the other position being for locking either tube 14 or tube 18 in the open position.
  • Floats 40, 44 are airtight so as to define a closed chamber and are pivoted off centre so that the pivot point does not coincide with the centre of gravity or the centre of lift. In this manner floats 40, 44 are free to pivot to adopt a more vertical position or substantially vertical position under the influence of gravity when the cistern is empty and are free to pivot to adopt an inclined position when the cistern is full of water or in either of the flush positions.
  • the normal in use position of the floats 40, 44 when the cistern is full of water is such that they adopt an inclined position with respect to frame member 8 as shown in Figures 2 to 4 due to the buoyancy of the air filled floats.
  • the floats 40, 44 move to a less angularly inclined position such as a more vertical position as shown in Figure 1 to allow the valve members 14, 18 to return to their closed positions depending on the mode of flushing the cistern.
  • Float 40 is provided with a locking edge 48 along the upper inboard edge facing upper tube 14 for co-operatively engaging upper ring 16 in use, and a shoulder 49 extending obliquely along one side edge for engaging with the edge of frame member 8 to limit the movement of float 40.
  • Float 44 is provided with a similar locking edge 50 along the upper inboard edge facing lower tube 18 for co-operatively engaging lower ring 22 in use, and a shoulder 51 extending obliquely along one or both opposite sides for engaging with the edge of frame member 8 to limit the pivotal movement of float 44 in the anti-clockwise direction.
  • the cistern In operation of a half flush of flushing valve 2 of the present invention, the cistern is full of water up to the level shown in Figures 2 to 4, which level is close to the top of upper tube 14. It is to be noted that the level of water is below the level of the upper edge of the open topped inlet tube 14 and is about the is level of upper bracket 10 of frame 4.
  • the cistern When the cistern is full floats 40, 44 adopt an angularly inclined position as shown in Figures 2 to 4 with the respective actuating corners 48, 50 of floats 40, 44 respectively in contact with the side wall of the two inlet tubes 14, 18, particularly as shown in Figure 3.
  • valve 2 in Figure 3 which is the fully closed position, is such that upper tube 14 is sealed to lower tube 18 which is sealed to outlet 9 thus containing water in the cistern and preventing any discharge of water from the cistern to the toilet.
  • This is the normal position of the cistern in a state where it is ready for operation. Water is admitted to the cistern through a separate inlet valve, details of which will be described below.
  • Tube 18 is lifted sufficiently for ring 22 to clear edge 50 of float 44 to allow edge 50 to rest against and under ring 22 to support tube 18 in the fully open position and maintain the valve in this position until the level of the water in the cistern falls below the lower edge of float 44 which is about the level of the outlet 9. It is to be noted that as tube 18 is lifted so also is tube 14 so that the seal between tubes 14 and 18 is maintained at all times during the full flush mode of operation and the only outlet for the water is through the bottom of the cistern. It is noted that during this operation float 40 also pivots. However there is no effect on operation of the device since in this mode of operation float 40 does not contact ring 16 due to the different spacings of ring 22 from float 44 and ring 16 from float 40. Further, it is to be noted that the positions of rings 16, 22 are such that tubes 14, 18 will be retained in one of two positions - either the full flush position, or the half flush position. It is not possible for the locking edges of both floats to lock both tubes simultaneously.
  • float 44 pivots anti-clockwise in accordance with the force of gravity to release ring 22 and allow tube 18 to gravitationally fall thus resealing outlet 9.
  • An inlet valve then operates to admit water into the cistern so that the level rises past float 44 and then past float 40 whereupon each float in turn pivots clockwise to assume their former positions respectively with edge 50 resting against tube 18 and edge 48 resting against tube 14 but at locations above the respective positions of rings 16, 22.
  • inlet valve 60 which is located inside the cistern (not shown).
  • the base or lower surface 62 of the cistern is provided with an aperture through which a stand pipe 64 is received and sealed thereto with a conventional sealing filling.
  • Stand pipe 64 is connected to the normal pressurised water supply and supplies water internally into the cistern. Supply of the water to the cistern is controlled by operation of inlet valve 60.
  • Valve 60 is located at the top of stand pipe 64 immediately above water entry orifice 66 and delivery pipe 68 provided with a spout (not shown) or similar nozzle for dispersing the energy of the incoming water thus resulting in silent operation of the valve.
  • Valve 60 comprises a float 70 which is generally right angle triangular in vertical cross section and generally U-shaped in horizontal section as shown in Figures 6 and 7.
  • Float 70 is arranged so that stand pipe 64 is located in the cut-out of the "U" and is pivotally connected to the stand pipe with one of the sides of the triangular float being substantially vertical, another side being substantially horizontal, said sides being arranged substantially perpendicular to each other, and the third oblique side being angularly inclined to the other two sides.
  • the precise shape of the float can be varied.
  • the float In the normal position, which is to say the prepared-for-operation position when the cistern is full, the float is angularly inclined to the stand pipe which is a position in which the float is pivoted in an anti-clockwise direction from that shown in Figure 5.
  • Float 70 is provided with a yoke 72 at a position along its upper side in use towards the apex of the horizontal side with the oblique side.
  • An actuating lever 74 and lever 76 or push rod or similar force or motion transmitting device or linkage is connected to the yoke at one end and is provided with or connected to a cam 78 at the other end.
  • the link and cam arrangement is such to allow the cam 78 to bear upon the upper end of plunger 80 located in a suitable housing 82 forming a plunger valve. It is to be noted that a single lever provided with a roller wheel at each end can be used in place of the pair of levers 74, 76 and cam 78. In this embodiment, one of the roller wheels acts directly on plunger 80 of the plunger valve.
  • Two “O" rings 84, 86 are provided between plunger 80 and housing 82 to seal the housing and prevent water from escaping from the housing.
  • a pad 88 is provided at the lower end in use of plunger 80 for selectively closing and opening water entry orifice 66 and thus regulating the flow of water from stand pipe 64 to delivery pipe 68 through water entry orifice 66.
  • Housing 82 is provided with an adjustable threaded cap 90 for adjusting the amount of travel of plunger 80 so that a gap exists between the top of plunger 80 and cam 78 while the float 70 is in its vertical position allowing water into the cistern, yet allows sealing contact between pad 88 and orifice 66 when the valve is in the closed position.
  • One modification of the plunger valve is to provide the valve with a mechanical lock so that excessive water pressure will not force the valve to inadvertently open or leak.
  • roller wheels are used to eliminate any unwanted friction.
  • Figure 8 there is shown a modified form of the dual flush valve of Figures 1 to 4 which modified valve is similar to the valve of Figures 1 to 4 except that a single tube 100 replaces upper tube 14 and lower tube 18. Accordingly, the same reference numerals will be used for corresponding features in Figure 8 as are present in Figures 1 to 4. Additionally, as tube 100 is a single tube extending from bracket 6 to bracket 10 and axially movable therebetween in use there is no sealing arrangement 17 or seal 19. Tube 100 operates in the same way as tubes 14 and 18 in that tube 100 may be lifted a small amount, such as for example 15 mm from seal 20 to adopt a half flush position or a larger amount, such as for example about 30 mm, to adopt a full flush position.
  • a small amount such as for example 15 mm from seal 20 to adopt a half flush position or a larger amount, such as for example about 30 mm, to adopt a full flush position.
  • the inlet valve is unique in construction in that it is either in the fully open position or in the fully closed position, there being no delayed progressive movement between the two extreme positions, but rather there is only instantaneous operation between the two positions.
  • the inlet valve has no intermediate stops or delays.
  • This advantage has been achieved by designing a hydrodynamic float which will remain in the fully open position, that is in which the float extends vertically downwards as disclosed in Figure 5, until the rising water in the cistern reaches a predetermined level when the valve will move freely and effortlessly without sound to the fully closed position thereby stopping the flow of water into the cistern. Additionally, even though the valve moves quickly between the open and closed positions, there is no water hammer produced.
  • the float moves a lever so designed that it produces, by a compounded mechanical advantage, considerable force on the opening of orifice 66.
  • Another advantage is that the "horse-shoe" horizontal section of the float permits a wrap-around effect of the vertical stand pipe, thus reducing the space required for the components of the valve and for operation.
  • inlet valve and the dual flushing valve may be arranged together within the same cistern so that both valves operate in combination with each other.
  • An advantage of the dual flushing valve of the present invention, particularly the valve of Figure 8, is that a reduced number of components are employed and further there is only a single seal required, which contributes to the low cost of manufacture and the reliability of the valve arrangement.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Float Valves (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Catalysts (AREA)
  • Glass Compositions (AREA)
  • Polarising Elements (AREA)
  • Fluid-Driven Valves (AREA)
EP96925598A 1995-08-02 1996-08-02 Flush valve Expired - Lifetime EP0842334B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPN455495 1995-08-02
AUPN4554/95 1995-08-02
AUPN4554A AUPN455495A0 (en) 1995-08-02 1995-08-02 Improvements in or relating to valves
PCT/AU1996/000486 WO1997005337A1 (en) 1995-08-02 1996-08-02 Improvements in or relating to valves

Publications (3)

Publication Number Publication Date
EP0842334A1 EP0842334A1 (en) 1998-05-20
EP0842334A4 EP0842334A4 (en) 1998-12-09
EP0842334B1 true EP0842334B1 (en) 2005-11-02

Family

ID=3788889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96925598A Expired - Lifetime EP0842334B1 (en) 1995-08-02 1996-08-02 Flush valve

Country Status (8)

Country Link
EP (1) EP0842334B1 (zh)
JP (1) JPH11510224A (zh)
CN (1) CN1154775C (zh)
AT (1) ATE308645T1 (zh)
AU (1) AUPN455495A0 (zh)
DE (1) DE69635373T2 (zh)
NZ (1) NZ313562A (zh)
WO (1) WO1997005337A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2819835B1 (fr) * 2001-01-23 2003-02-28 Sanitaire Accessoires Services Mecanisme de chasse d'eau pour reservoir de toilettes
GB2396163B (en) * 2002-12-12 2006-05-17 Polypipe Bathroom & Kitchen Pr Valve assembly for discharging a cistern
ES2244272B2 (es) * 2003-02-06 2006-03-16 Fominaya, S.A. Perfeccionamientos en descargadores de cisternas de inodoros.
EP1577451A1 (fr) * 2004-03-18 2005-09-21 Moise Piat Dispositif de sécurité de fermeture étanche du clapet dans les mécanismes de chasse d'eau des w.c.
CN101166159B (zh) 2006-10-18 2010-07-28 阿里巴巴集团控股有限公司 一种确定垃圾信息的方法及系统

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH579684A5 (zh) * 1974-07-11 1976-09-15 Gebert & Cie
DE2717142A1 (de) * 1977-04-19 1978-10-26 Hans Dubatuvka Wassersparendes doppelablassventil fuer toilettenspuelkaesten
IL55874A0 (en) * 1978-11-05 1979-01-31 Raz Zeev Toilet bowl flush system
AU8606582A (en) * 1981-07-15 1983-01-20 Robert Henry Burgess Variable flush cistern
AU557062B2 (en) * 1982-01-06 1986-12-04 Upl Group Ltd. Variable flushing cistern
AT375118B (de) * 1982-03-31 1984-07-10 Weissenbacher Herbert Mag Teilmengen-ablaufvorrichtung fuer spuelkaesten od. dgl.
DE3221747A1 (de) * 1982-06-09 1983-12-15 Ernst 5000 Köln Geuer Dosierventilsystem fuer wc-spuelkaesten
AU2108583A (en) * 1982-11-18 1984-05-24 James Hardie Industries Ltd. Selective-flush cistern
AU631716B2 (en) * 1988-06-17 1992-12-03 Caroma Industries Limited A flushing mechanism
AU633389B2 (en) * 1990-01-11 1993-01-28 Nigel James Croser Two stage cistern flush system
AU638573B2 (en) * 1990-05-09 1993-07-01 Philmac Pty Ltd Dual flushing mechanism and flushing mechanism support plate
FR2672322B1 (fr) * 1991-02-01 1996-10-18 Porcher Ets Dispositif de chasse d'eau permettant de delivrer differents volumes d'eau predetermines.
AU1384292A (en) * 1991-03-28 1992-10-01 Paul Stewart Huxtable Multi-stage outlet valve for a cistern

Also Published As

Publication number Publication date
AUPN455495A0 (en) 1995-08-24
EP0842334A1 (en) 1998-05-20
ATE308645T1 (de) 2005-11-15
DE69635373T2 (de) 2006-07-27
CN1154775C (zh) 2004-06-23
CN1196103A (zh) 1998-10-14
EP0842334A4 (en) 1998-12-09
DE69635373D1 (de) 2005-12-08
JPH11510224A (ja) 1999-09-07
WO1997005337A1 (en) 1997-02-13
NZ313562A (en) 1998-06-26

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