WO2001036757A1 - Mecanisme de chasse d'eau - Google Patents

Mecanisme de chasse d'eau Download PDF

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Publication number
WO2001036757A1
WO2001036757A1 PCT/ZA2000/000199 ZA0000199W WO0136757A1 WO 2001036757 A1 WO2001036757 A1 WO 2001036757A1 ZA 0000199 W ZA0000199 W ZA 0000199W WO 0136757 A1 WO0136757 A1 WO 0136757A1
Authority
WO
WIPO (PCT)
Prior art keywords
float
plunger
casing
flushing mechanism
cistern
Prior art date
Application number
PCT/ZA2000/000199
Other languages
English (en)
Inventor
James Churchill Haslam
Original Assignee
James Churchill Haslam
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by James Churchill Haslam filed Critical James Churchill Haslam
Priority to AU18219/01A priority Critical patent/AU1821901A/en
Publication of WO2001036757A1 publication Critical patent/WO2001036757A1/fr

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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

Definitions

  • This invention relates to a flushing mechanism for discharging water from cisterns and more particularly water from toilet cisterns in water borne sewerage systems.
  • a cistern flushing mechanism comprising a flushing valve and a first float assembly including an upstanding valve stem within a casing the valve stem connectable to an operating handle a plunger releasably securable to the casing connected to a second operating handle and movable selectively with or longitudinally relative to the valve stem a second float movable relative to the casing to operate a latching means for securing the plunger to the casing with the second float in a raised position, the plunger and first float assembly co-operating for relative downward movement of the plunger to cause closure of the flushing valve characterised in that the mechanism includes means for damping the closure movement of the valve at least during half flush operations.
  • the means to be the plunger and valve stem assembly or casing providing co-operating surfaces shaped to induce reduction in pressure in a space between them when separated and for these surfaces to be located within the casing, for the surfaces to be outwardly tapering and located on the lower end of the plunger and partway along the length of the valve stem.
  • the space will be vented when reaching a predetermined size.
  • the invention further provides for the plunger to be weighted, for the plunger to be a tube slideable relative to the valve stem or a radial flange extending from such a tube.
  • the invention also provides for the second float to be annular and located around an extension to the casing, to have upper and lower sections with an opening through the wall between the sections and for the float to be adjustable in height relative to the casing.
  • the second float to be adjustable on a guide slideable on the casing with the guide including means for engaging the latching means and for the latching means to be a lever pivotally supported on the casing and carrying a suitable slide or roller or other friction reducing member contactable by the guide.
  • Still further features of this invention provide for there to be a pair of latching means positioned on the casing diametrically opposed to each other with respect to the valve stem and for the plunger to have a rack formed thereon engageable by a pawl formed on the latching lever.
  • FIG 1 shows a longitudinal section of one form of cistern flushing mechanism
  • FIGS 2 and 3 are similar views of an alternative embodiment showing the valve open and closed.
  • the flushing mechanism (1) includes a flushing valve seat (2) forming part of a fitting (3) to be located in sealing engagement with an aperture through the base of a cistern (not shown).
  • the fitting (3) provides, in the usual way, a base to which a casing (4) for the valve assembly is releasably attached.
  • the casing (4) is stepped at (5) for the purposes described below.
  • a flushing valve (7) closes on seat (2) and has an upstanding hollow valve stem (8) which forms a cistern overflow pipe in well known manner.
  • the valve stem (8) carries adjacent the valve (7) an air float (9) also in conventional manner. This float operates normally to prevent closure of the valve (7) onto seat (2) prior to a full flush operation of the mechanism.
  • valve stem (8) The upper free end of the valve stem (8) is adapted to be connected to a manipulating handle (not shown) which will be mounted to the outer front face of the cistern or to the cistern lid.
  • a plunger (10) in the form of a hollow rod (11).
  • This rod has a weighted collar (12) which moves in a recess
  • the upper end of the rod (11) is engaged by the end (15) of a lever (16) forming part of a linkage to a second manipulating handle (not shown).
  • the step (5) provides a mounting (17) for a cranked catch (18) one arm (19) of which is movable to pass through an appropriate slot in the casing to engage a peripheral rack or other detent providing formation (13A) on the lower end of the hollow rod (11) to releasably secure the latter to the casing (4) when the hollow rod is in its raised position.
  • the other arm (20) of catch (18) carries a protrusion (21) movable by the stepped end (22) of a tubular member (23) and preferably affords reduced frictional contact between the components.
  • the tubular member (23) is slideable on the outer surface of the upper end of the casing. This movement will pivot the cranked catch (18) to move the arm (19) through the slot in the casing and allow the end of arm (19) to run against the hollow rod (11).
  • the member (23) is externally screwthreaded to be engaged by a second tubular member (24) which carries a second float (25). This arrangement enables the height of float (25) to be adjusted in the flushing mechanism.
  • a catch (18) will be provided on each side of the assembly for symmetrical operation.
  • the members (23) and (24) may alternatively be releasably and longitudinally adjustably connected together through a rack and pawl arrangement.
  • the lower part of the casing (4) and the valve stem (8) provide an annular chamber (26) for the air float (9).
  • a formation (27) Adjacent the lower end of the hollow rod (11) a formation (27) provides an outwardly tapered surface. This surface co-operates with the surface (28) formed around the outwardly expanding section of the wall of the hollow valve stem (8). Complementary shoulders (29) are provided on these two components which abut when the hollow rod (11) is raised by lever (16) on operation of the second handle (not shown).
  • the exterior surface of the valve stem is stepped inwardly at (29A).
  • the flushing mechanism can be operated to provide either a full flush or a half-flush.
  • "Half” here is meant to be a part flush which can be varied, as described below, by varying the relative position of the second float (25) on the tubular member (23).
  • the cistern is ready to flush.
  • valve stem (8) For a full flushing, operation is effected by operating the handle connected to the valve stem (8).
  • the valve (7) is lifted off its seat and float (9) is located in the chamber (26) formed in the casing.
  • the link (16) remains in place because its associated handle has not been moved.
  • valve (7) drops to the closed position and the float (25) rises with the appropriate water level. Initially float (9) does not rise as it is held in position by the downward thrust of the water in the cistern.
  • the valve (7) is lifted so that the float is raised into the chamber in the casing out of the flow path of the water stream the buoyancy of the float (9) becomes effective to retain the valve (7) open.
  • the half flush handle When a half flush is required, the half flush handle is operated. This lifts the plunger (10) and valve (7) together. The normal linkage to the full flush operating handle at this time will be moved with the half flush handle. The movement of the hollow rod (11) enables the arm (19) of the catch (18) to engage with the rack (13A) on the plunger (10) of the hollow rod (11).
  • the cistern begins to flush and lowering of the water level results in dropping of float (25) and the second member (24). This causes release of the catch (18) from the raised plunger (10) which drops under the influence of weight (12).
  • the flushing mechanism (101) illustrated includes a flushing valve seat (102) forming part of a fitting (103) to be located in sealing engagement with an aperture through the base of a cistern (not shown).
  • the fitting (103) provides, in the usual way, a base to which a casing (104) for the valve assembly is releasably attached.
  • the casing (104) is stepped at (105) and (106) for the purposes described below.
  • the casing can be of the same diameter throughout its length.
  • a flushing valve (107) closes on seat (102) and has an upstanding hollow valve stem (108) which forms a cistern overflow pipe in well known manner.
  • the valve stem (108) carries adjacent the valve (107) an air float (109) also in conventional manner. This float operates normally to prevent closure of the valve (107) onto seat (102) prior to a full flush operation of the mechanism when a full flush is necessary.
  • valve stem (108) The upper free end of the valve stem (108) is adapted to be connected to a manipulating handle (not shown) which will be mounted to the outer front face of the cistern or to the cistern lid.
  • the plunger is weighted as indicated at (112) and a peripheral rack formation (113) is provided on the outside of rod (111).
  • the free end of the rod (111) is located normally by the stop (114) on the end of casing (104).
  • the rod (111) is engaged by the end (115) of a lever (116) forming part of a second linkage to a second manipulating handle (not shown).
  • the steps (105) and (106) in the casing provide chambers (117) and (118) in which the float (109) and plunger (110) can move during operation of the mechanism as described below.
  • the step (106) provides a mounting for a pair of latching means (119).
  • Each latching means (119) consists of a lever (120) pivotally supported on the step (116) of the casing (104).
  • the lever (120) carries an upper roller (121) and lower roller (122). Opposite these rollers (121) and (122) is a pawl (123). Pivoting of the levers (120) causes the pawl (123) to pass through a slot in the casing (104) to engage the rack formation (113) when the rod (111) is raised. This is described more fully below.
  • the lever (120), rollers (121) and (122) are designed to enable the lever (120) to pivot the pawl (123) when the plunger (110) is moved upwardly but to lock the rod (111) to the casing (104) and prevent unintentional downward movement of the plunger (110).
  • the pair of latching means provides symmetry to the assembly but only one such means is essential to the operation of the valve assembly.
  • a tubular guide (124) which has a radially outwardly extending projection carrying cam surface (125). This latter is positioned to engage the upper roller (121) of each latching means to assist in relative movement between the surface (125) and the respective rollers (121) causing the pivoting movement of the lever (120) to enable the pawls (123) to engage the rack formation (113).
  • the upper end of guide (124) is screwthreaded or racked so that a second float (126) can be adjustable positioned thereon.
  • This second float (126) may be divided into two chambers (127), (128) with apertures (129) through the outer wall of the float. This divides the float into an upper air containing chamber (127) and a lower water filled chamber (128).
  • the effect of this construction of the float is to ensure a positive downward movement of the guide (124) as the water level drops.
  • the water trapped in the float increases the weight acting on the float.
  • This construction is not essential and a simple air trap float can be used. In the latter case only a single step need be provided in the shape of the casing as no space for the water filled chamber is necessary.
  • the flushing mechanism can be operated to provide either a full flush or a half-flush.
  • "Half” here is meant to be a part flush which can be varied, as described below, by varying the relative position of the second float (126) on the guide (124).
  • the cistern is ready to flush.
  • valve stem (108) For a full flushing, operation is effected by operating the handle connected to the valve stem (108).
  • the valve (107) is lifted off its seat and float (109) is located in chamber (107).
  • the link (106) remains in place because its associated handle has not been moved.
  • valve (107) drops to the closed position and the float (126) rises with appropriate water level. Initially float (109) does not rise as it is held in position by the downward thrust of the water in the cistern.
  • valve (107) is lifted so that the float is raised into chamber (107) out of the flow path of the water stream the buoyancy of the float (109) becomes effective to retain the valve (107) open.
  • the half flush handle When a half flush is required, the half flush handle is operated. This lifts the plunger (110) and valve (107) together. The normal linkage to the full flush operating handle at this time will be moved with the half flush handle.
  • the pivoted levers (121) engage the pawls (123) with the rack formation (113) and this holds the plunger (110) raised in chamber (108).
  • the cistern begins to flush and lowering of the water level results in dropping of float (126) and guide (124). This causes release of the raised plunger (110) which drops under the influence of weight (112) to contact the top of the lifted float (109). This in turn disturbs the buoyancy of float (109) and valve (107) is forced to close against the flow through the cistern outlet.
  • the cistern refills after only a part flush which is determined by when the adjustable upper float drops to activate the latching mechanism.
  • Figure 3 shows the position of the components after the plunger (110) has dropped to its lowest point but before the flushing valve (107) has completely closed.
  • a damping action on the final closing of valve (107) is achieved by the provision of a chamber (130) between the outside of float (109) and the casing (104).
  • the restricted outlet (131) from the chamber (130) provides the damping effect.
  • damping chamber (132) is created between the hollow valve stem (108) and the rod (110). This damping chamber is effective for half flush operation only. In this operation the water level (133) remains above the chamber (132). However, on full flush operation the water level drops below the bottom of chamber (132) and there is no damping effect on the movement of valve (107) at final closure.
  • the invention provides a compact effective unit for a dual flushing operation. Its symmetrical construction lends itself to smooth operation and the provision of a skirt depending from upper float (126) hides the latching mechanisms from view giving the mechanism an attractive overall appearance.

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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)
  • Float Valves (AREA)
  • Sanitary Device For Flush Toilet (AREA)

Abstract

L'invention concerne un mécanisme de chasse d'eau comprenant une tige de soupape creuse allongée (8) supportant une soupape (7) ainsi qu'un flotteur (9) relié à un élément d'actionnement dans lequel un second ensemble flotteur (25) permet de commander un piston plongeur (10) relié à un second élément d'actionnement (16) destiné à ouvrir partiellement la soupape (7) et à assurer sa fermeture après l'exécution d'une opération de rinçage partiel.
PCT/ZA2000/000199 1999-11-15 2000-10-25 Mecanisme de chasse d'eau WO2001036757A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18219/01A AU1821901A (en) 1999-11-15 2000-10-25 Cistern flushing mechanism

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ZA99/7111 1999-11-15
ZA997111 1999-11-15
ZA200000962 2000-02-28
ZA2000/0962 2000-02-28

Publications (1)

Publication Number Publication Date
WO2001036757A1 true WO2001036757A1 (fr) 2001-05-25

Family

ID=27145409

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2000/000199 WO2001036757A1 (fr) 1999-11-15 2000-10-25 Mecanisme de chasse d'eau

Country Status (2)

Country Link
AU (1) AU1821901A (fr)
WO (1) WO2001036757A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685605A1 (fr) * 1994-05-30 1995-12-06 Siamp Cedap Dispositif de chasse d'eau à double bouton de commande permettant de délivrer par actionnement de chaque commande un volume de chasse prédéterminé
EP0723050A1 (fr) * 1995-01-18 1996-07-24 Friatec Aktiengesellschaft Keramik- und Kunststoffwerke Dispositif d'écoulement d'un réservoir de chasse d'eau

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685605A1 (fr) * 1994-05-30 1995-12-06 Siamp Cedap Dispositif de chasse d'eau à double bouton de commande permettant de délivrer par actionnement de chaque commande un volume de chasse prédéterminé
EP0723050A1 (fr) * 1995-01-18 1996-07-24 Friatec Aktiengesellschaft Keramik- und Kunststoffwerke Dispositif d'écoulement d'un réservoir de chasse d'eau

Also Published As

Publication number Publication date
AU1821901A (en) 2001-05-30

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