EP0222607A2 - Flüssigkeitsdosiervorrichtung - Google Patents

Flüssigkeitsdosiervorrichtung Download PDF

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Publication number
EP0222607A2
EP0222607A2 EP86308723A EP86308723A EP0222607A2 EP 0222607 A2 EP0222607 A2 EP 0222607A2 EP 86308723 A EP86308723 A EP 86308723A EP 86308723 A EP86308723 A EP 86308723A EP 0222607 A2 EP0222607 A2 EP 0222607A2
Authority
EP
European Patent Office
Prior art keywords
bottle
dispensing device
fluid dispensing
fluid
cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86308723A
Other languages
English (en)
French (fr)
Other versions
EP0222607A3 (de
Inventor
Geoffrey Robert Hammond
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.)
Reckitt Benckiser Healthcare UK Ltd
Original Assignee
Reckitt and Colman Products Ltd
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 Reckitt and Colman Products Ltd filed Critical Reckitt and Colman Products Ltd
Publication of EP0222607A2 publication Critical patent/EP0222607A2/de
Publication of EP0222607A3 publication Critical patent/EP0222607A3/de
Withdrawn legal-status Critical Current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
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D9/03—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing consisting of a separate container with an outlet through which the agent is introduced into the flushing water, e.g. by suction ; Devices for agents in direct contact with flushing water
    • E03D9/033—Devices placed inside or dispensing into the cistern
    • E03D9/038—Passive dispensers, i.e. without moving parts

Definitions

  • the present invention relates to a fluid dispensing device for dispensing substantially constant doses of fluid from a bottle or similar container into a cistern or the like each time the cistern is flushed.
  • the fluid dispensing device is especially, but not exclusively, suited for dispensing a treatment fluid containing an active ingredient, such as disinfectant or detergent, into the cistern of a toilet installation during each flushing thereof.
  • the fluid dispensing devices hitherto known for such purposes incorporate a generally bell-shaped chamber which opens at the bottom into the neck of a bottle filled with fluid to be dispensed.
  • the bottle is inverted, so that the fluid dispensing device lies below it, and is mounted in the cistern to ensure that the bottle is at least partially immersed when the cistern is full.
  • the bell-shaped chamber defines an air trap in which a volume of air is caught as the cistern re-fills after each flushing.
  • volume of fluid dispensed at each flushing of the cistern is proportional to the volume of air previously forced into the bottle. It can further be shown that as the volume of air in the bottle increases, so the volume of air entering the bottle, each time the cistern fills, increases. Thus, as the bottle empties of fluid, increasing volumes of fluid are dispensed. This is undesirable and, if the initial doses of fluid were adequate, unnecessary.
  • a fluid dispensing device for dispensing controlled doses of fluid from an inverted bottle into a cistern, each time the cistern is flushed, comprising a product feed tube which is adapted in use to open at one end into the interior of the bottle and which defines at the other end an air trap, characterised in that the fluid dispensing device further comprises a chamber which is open to the air trap end of the product feed tube, a siphon connecting the chamber to an outlet port in the exterior of the fluid dispensing device and an air vent connecting the chamber to the exterior of the fluid dispensing device at a point above the outlet port.
  • the fluid dispensing device In use the fluid dispensing device is secured in the mouth of a bottle or similar container filled with fluid, usually a treatment fluid, to be dispensed, with the product feed tube opening into the interior of the bottle. The bottle is then inverted so that the fluid dispensing device lies below it and is at least partially immersed in a cistern into which the treatment fluid in the bottle is to be dispensed each time the cistern is flushed.
  • fluid usually a treatment fluid
  • the falling cistern water level will eventually expose the air vent so that air can re-enter the chamber, thereby allowing the level of fluid in the chamber (which is all the time being supplemented with the treatment fluid emerging from the product feed tube) to also start to fall. In so doing, the fluid in the chamber and siphon will be displaced through the siphon.
  • cistern fluid starts to enter the chamber raising the level of fluid in the chamber. Initially air will be released from the chamber through the air vent, but as the fluid in the cistern rises above it a point will be reached where air will be driven from the air trap into the bottle. As the volume of air in the headspace above the treatment fluid is now fractionally larger than on the previous occasion, then the amount by which it can be compressed or expanded will also be minutely increased so that there is potential to drive a slightly larger amount of air into the bottle.
  • the fluid dispensing device will adopt a substantially stable state, until the cistern is flushed again, when the treatment fluid will dispense in exactly the same way as described before.
  • the volume of air which can be driven into the bottle will exceed the volume of the air trap (if the trap is suitably sized) and thereafter all subsequent filling cycles will drive, firstly air, but then fluid from the chamber into the bottle via the product feed tube.
  • the composite effect of these two parameters is that as the bottle empties, increasing volumes of fluid will be dispensed from it, but at the same time these increased volumes will become increasingly diluted by the fluid dirven into the bottle from the chamber.
  • An advantage of the present invention is that it discharges treatment fluid only during the latter part of the flushing operation.
  • a substantial amount of the treatment fluid dispensed remains in the toilet bowl after flushing. It also results in none or virtually none of the dispensed treatment fluid remaining in the cistern following completion of the flushing operation. It also avoids unnecessary dissipation of any active material in the fluid such as a perfume constituent and unnecessary or undesirable dilution of active material in the fluid. It also permits the amount of fluid dispersed on each flushing to be pre­determined within tolerable limits of variation of the amount.
  • the fluid dispensing device comprises a plug member which is adapted in use to be secured in the mouth of a bottle and the product feed tube is formed in said plug member.
  • the fluid dispensing device further comprises a cap member which fits over the plug member so as to define therebetween said chamber, said siphon and said air vent.
  • the cap is mounted relative to the plug so as to be moveable between a first position in which the fluid dispensing device is inoperative and a second position in which the fluid dispensing device is operative.
  • This allows a bottle filled with fluid and fitted with the fluid dispensing device to be transported without spillages occurring by moving the cap relative to the plug to said first position.
  • the dispensing device is provided with internal seals comprising surfaces which mutually engage respectively on the cap and the plug when the cap is in said first position to close the siphon and the air vent to passage of fluid from the bottle.
  • the end of the air trap opening into the chamber lies above the level of the bottom edge of the siphon where it opens into the chamber. This ensures that as air enters the chamber through the siphon and bubbles up through the surface of the residual fluid in the chamber the fluctuating surface of the residual fluid cannot strike the end of the air trap and cause momentary fluctuations in the pressure of air within the air trap.
  • siphon propagation chamber can be formed at or towards the external end of the siphon.
  • This siphon propagation chamber houses a body of liquid which, when the level of water in the cistern falls below it starts to drain and draws water through the siphon, thus promoting siphon action.
  • the siphon propagation chamber is defined by an external upstanding peripheral wall around the outlet port.
  • a fluid dispensing agent in accordance with the first aspect of the present invention in combination with a bottle to hold fluid to be dispensed.
  • the bottle may be formed with a screw-threaded neck and the cap with an internal screw thread to permit it to be screwed onto the neck.
  • the cap may be rendered captive by forming with an inwardly directed annular rib or bead to ride over a circumferential rib or bead is formed with a neck having a cam surface, and the cap is formed with a complementary cam surface so that when the two surfaces are circumferentially displaced the cap assumes the said first position in which the fluid dispensing device is inoperative, and so that, by then relatively rotating the neck and cap to assume said second position, one cam surface can be made to ride up on the other axially to displace the cap in relation to the bottle neck and render the fluid dispensing device operative.
  • An arrangement of this kind is disclosed in U.K. Patent No. 1260128.
  • the cap in this arrangement, is held on the neck by a circumferential rib formed on the bottle neck to act against the inner surface of the cap.
  • the air vent is formed between the cap and the bottle by providing one or more axial slits in the ribs/or screw threads securing the cap to the bottle.
  • the volumetric capacity of the internal air trap is chosen to determine the volume of air forced into the bottle by water rising in the cistern.
  • a bottle for use with a fluid dispenser comprising an internal stay made integral with the bottle wall and passing between diametrically opposed locations thereon, or other means of rendering the bottle wall more rigid, e.g. by ribbing.
  • the dispenser comprises a cap 1 having an internal screw thread 3 by which it is screwed onto a screw-threaded neck of a bottle, part of which is shown and indicated at 5.
  • the neck is formed with a circumferential bead or rib 7, and the cap is formed with an internal complementary circumferential bead 9.
  • the cap is formed of a material having some resilient flexibility and the bead 9 is forced over the bead 7 to keep the cap captive on the neck but to permit the cap to be screwed up and down to some extent on the neck while keeping the cap captive on the neck.
  • the cap is stationed to permit the dispenser to operate, that is, to permit fluid contained in the bottle to be dispensed from the device when the bottle in inverted.
  • the cap comprises an internal transverse web 11 supporting a central tube 13 forming part of a siphon generally indicated at 15.
  • the tube 13 may be regarded as being the "external" tube of the siphon in that it provides direct access for liquid from the siphon to the exterior of the dispenser.
  • the dispenser also comprises a plug 17 which seats with a force fit into the neck of the bottle.
  • the plug comprises a sleeve 19 surrounding the tube 13, concentric therewith and spaced from the tube; the sleeve being closed by an end wall 21 at its top end as seen in Figure 1 and forming the "internal" tube of the siphon.
  • the plug also comprises an access tube 23 providing access between the interior of the bottle and the siphon; and the tube opens into an air trap, generally indicated at 25, formed by an annular wall 27 and the sleeve 19.
  • the siphon comprises an access for fluid from the bottle via access tube 23, and consequently access for air to pass into the bottle, and access from the siphon to the exterior via tube 13.
  • the cap is formed with an upstanding peripheral wall 29, which, when the bottle is inverted as shown in Figure 1, depends below the level of the web 11 and forms a siphon starter chamber generally indicated at 31.
  • the bead 7 of the bottle neck is formed with an axial slot (not shown) to constitute an air vent and the thread on the bottle neck is interrupted to permit air from the exterior of the bottle to pass between the bottle exterior and the interior of the dispenser via the air vent.
  • the web 11 is also formed with an annular rib 33 which, when the cap is screwed fully home on the bottle neck from the position shown in Figure 1, is forced into the annular wall 27 of the internal air trap to prevent fluid from the bottle exiting via the slot in the bead 7 and the interrupted screw thread on the bottle neck.
  • the plug comprises a central projection 34 to close off the siphon to fluid from the bottle. The cap is screwed to this position for transit and storage of the device when attached to a bottle of fluid.
  • the cap is screwed to the position shown in Figure 1, and the bottle to which it is attached, inverted and suspended in the cistern of the toilet installation.
  • fluid drains from the bottle onto the upper surface (as seen in Figure 1) of web 11, although not in a sufficient amount to cause it to escape through the siphon and, as a result, no fluid exits from the dispenser.
  • air within the starter chamber 31 is compressed by the head of water in the cistern and passes through the siphon to the air vent to permit water to enter the cap via the siphon.
  • the air compressed by the head of water is able to escape via the air vent for as long as the air vent is exposed to the ambient atmosphere, but once the vent is covered by the cistern water, air can then only escape as air bubbles until the air pressure in the cap is insufficient to overcome the surface tension forces arising on formation of an air bubble.
  • This pressure, and hence the height of the airspace remaining trapped in the cap are an inverse function of the cross-sectional area of the air vent.
  • the bottle is filled with the fluid to be dispensed to leave a headspace therein, and air forced into the air trap thus passes to the headspace (not shown) to permit fluid to flow into the cap later. Water from the cistern enters the siphon and cap to mix with and dilute the fluid.
  • the partial vacuum in the bottle headspace causes air again to pass through the dispenser into the bottle headspace as the water level rises above the bottom edge of the annular wall 29 as explained above, to leave the dispenser ready for a further operation so that again there is a discharge of fluid from the bottle when the cistern level again falls.
  • the dispenser shown in Figures 2 to 5 is the presently preferred form of the present invention, but it is generally the same as the device of Figure 1 and like reference numerals in the two Figures represent similar parts.
  • the cap comprises a sleeve 41 formed with diametrically opposed triangular teeth 43 constituting cam surfaces; and the neck of the bottle is formed with complementary teeth 45.
  • the inner surface of the wall of the cap surrounding the neck is smooth except for an annular bead 46 at its inner surface at the extremity thereof, and the bottle neck is formed or has fitted thereon an annular rib 47 to engage with the bead 46 on the cap wall normally to keep the cap in place on the bottle neck.
  • the neck is also formed or fitted with two further annular beads 48, 50 and both these beads are interrupted as at 52 to provide the air vent (see Figure 2).
  • the plug in this embodiment is formed to provide an axial hole 49 to receive the part, indicated at 51, of the tube 13, but of greater axial length than part 51, and hole 49 interrupts a parallel axial hole 53, so that air or liquid can pass therebetween and part 51 of tube 13.
  • the plug as in the embodiment of Figure 1, also comprises an access between the bottle interior and the siphon, but in this instance, it is in the form of a tube 55 formed on the plug; and the internal air trap in this embodiment comprises an internal boss 57 formed in the plug at the siphon end of the tube 55 and tapered to provide a lead to the tube.
  • the cap is moved in the embodiment of Figure 2 from the inoperative to the operative position by rotating the cap relatively to the neck by a full 90° and this causes the respective cam surface to engage and force the cap axially outwardly of the neck to the position shown in Figures 4 and 5.
  • the cap may be formed as a one piece moulding of plastics material or it may be divided into component parts separately formed and subsequently assembled.
  • the air trap is formed so that the bottom edge 59 (as viewed with the dispenser inverted) of the radially outer wall 60 of the air trap is spaced from the bottom edge 62 (as viewed with the dispenser inverted) of the internal siphon tube 64 so that it is spaced from the surface of residual liquid in the cap following emptying of the siphon, whereby air subsequently entering the dispenser can pass to the air vent without having to bubble through the residual liquid.
  • a smoother flow of air is achieved and this helps to avoid “pumping" the bottle when formed of thin plastics material, due to the action of disturbed liquid in the internal air trap.
  • FIG 6 such a bottle, made in this instance of transparent material, and generally indicated at 63, is shown provided with an internal stiffening member or stay 65.
  • This may be integrally formed with the bottle by extrusion/blow moulding of a suitable plastics material.
  • the stay is integral with the wall 67 of the bottle as diametrically opposed locations thereon.
  • the consumer rotates the cap through the full 90°.
  • This causes the cap bead 46 first to "click” over the neck bead 47 and then over the neck bead 48 to lodge between neck beads 48 and 50.
  • This gives the consumer a definite indication that the cap has been rotated by the required amount.
  • the consumer then inverts the pack and immerses the bottle in the cistern to leave the bottom of the bottle (now uppermost) substantially level with the top edge of the cistern tank (not shown). This may be done by a suitable clip.
  • fluid passes into the dispenser to gather around the siphon tube.
  • water enters from the cistern, driving air out of the dispenser initially via the air vent until the water level rises to trap air in the air trap and drive air into the bottle to relieve the partial vacuum in the head­space thereof.
  • the fluid from the bottle is thus diluted with cistern water, and the air trap and the labyrinth nature of the passageway to the exit of the siphon tube prevent diffusion of the dilute fluid into the cistern.
  • the dispenser is now in a stable condition and is ready for its first operation.
  • the cistern is flushed, the external water pressure drops and the head of liquid in the bottle now becomes greater than the partial vacuum can support so that product starts to descend into the dispenser via the air trap. This causes displacement of liquid down the siphon tube, but initially this is just cistern water which entered the siphon tube on immersion of the pack.
  • the dispenser When the falling water level exposes the air vent to re-open access for air therethrough, the dispenser begins to drain and diluted fluid starts to emerge from the siphon tube although the siphon itself is not yet active as a siphon.
  • the diluted fluid When the water level then falls clear of what is in the inverted position the bottom edge of the siphon starter chamber, the diluted fluid continues to drain under its pressure head until the level falls below the top end of the siphon tube.
  • the siphon then operates, the action being promoted by the fall of the body of liquid in the siphon starter chamber. As a result of this operation, a discrete amount of the active fluid is dispensed into the cistern during the latter part of the flushing cycle.
  • the headspace in the bottle will have increased, due to the fact that some of the product has been dispensed from it, and this gives rise to a slightly greater amount of air entering the headspace. This happens on each subsequent operation until the point is reached where the air trap is feeding the air to its maximum capacity to the headspace.
  • diluted fluid from the dispenser is also forced into the bottle and this has the effect of diluting the fluid in the bottle.
  • This effect is compensated for by the fact that the diminishing head of fluid in the bottle results in a larger volume of diluted fluid being dispensed from it on each successive operation.
  • the dispenser accordingly delivers progressively increasing quantities of a fluid which is itself becoming progressively increasingly dilute. The overall effect therefore is that the amount of fluid per se i.e. of product originally in the bottle, dispensed remains substantially constant throughout operation.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Closures For Containers (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
EP86308723A 1985-11-09 1986-11-10 Flüssigkeitsdosiervorrichtung Withdrawn EP0222607A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8527695 1985-11-09
GB858527695A GB8527695D0 (en) 1985-11-09 1985-11-09 Fluid dispenser

Publications (2)

Publication Number Publication Date
EP0222607A2 true EP0222607A2 (de) 1987-05-20
EP0222607A3 EP0222607A3 (de) 1987-08-19

Family

ID=10588011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86308723A Withdrawn EP0222607A3 (de) 1985-11-09 1986-11-10 Flüssigkeitsdosiervorrichtung

Country Status (11)

Country Link
EP (1) EP0222607A3 (de)
JP (1) JPS62113020A (de)
AU (1) AU584473B2 (de)
BR (1) BR8605541A (de)
DK (1) DK532486A (de)
ES (1) ES1002069Y (de)
GB (2) GB8527695D0 (de)
NZ (1) NZ218213A (de)
PT (1) PT83703A (de)
ZA (1) ZA868493B (de)
ZW (1) ZW22486A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029971A1 (es) * 1997-12-04 1999-06-17 Francisco Alonso Fullola Dosificador automatico para productos higienico-desinfectantes para uso cotidiano para las personas
EP1087067A1 (de) * 1999-09-23 2001-03-28 Buck-Chemie GmbH . Abgabevorrichtung für die Abgabe eines Wirkstoffes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195368A (en) * 1986-09-20 1988-04-07 Polytop Plastics Limited Device for dispensing a quantity of liquid from a container
GB2243378B (en) * 1990-04-24 1994-07-06 Anthony John Crabtree Dispensing container
GB2298878A (en) * 1995-03-14 1996-09-18 Roger Pitman Dispensing unit for a toilet cistern
GB2309467B (en) * 1996-01-26 1998-06-10 Bobson Hygiene International I Cleaning solution dispenser for use in a water tank, and water tank capable of discharging mixture mixture of water and cleaning solution
MXPA03010284A (es) 2001-05-11 2004-03-09 Johnson & Son Inc S C Distribuidor de carrera descendente.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2839763A (en) * 1955-08-15 1958-06-24 William G Newsom Dispenser for flush tank deodorant bottle
US3073488A (en) * 1960-03-21 1963-01-15 Jan M Komter Apparatus for adding a quantity of a liquid to another liquid
US3864763A (en) * 1973-08-06 1975-02-11 Braun Co W Dispensing cap for discharging liquid into flush tank from a bottle during a flushing cycle
US3965497A (en) * 1975-06-17 1976-06-29 Corsette Douglas Frank Toilet chemical dispenser

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908209A (en) * 1974-04-15 1975-09-30 Owens Illinois Inc Fluid dispensing apparatus
US3945062A (en) * 1975-01-24 1976-03-23 Corsette Douglas Frank Toilet chemical dispenser
US4429809A (en) * 1980-04-25 1984-02-07 Airwick Industries, Inc. Device for the metered release of an active ingredient
NZ217285A (en) * 1985-09-16 1989-07-27 Sterling Drug Inc Dispenser for automatically metering liquids in response to liquid level

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2839763A (en) * 1955-08-15 1958-06-24 William G Newsom Dispenser for flush tank deodorant bottle
US3073488A (en) * 1960-03-21 1963-01-15 Jan M Komter Apparatus for adding a quantity of a liquid to another liquid
US3864763A (en) * 1973-08-06 1975-02-11 Braun Co W Dispensing cap for discharging liquid into flush tank from a bottle during a flushing cycle
US3965497A (en) * 1975-06-17 1976-06-29 Corsette Douglas Frank Toilet chemical dispenser

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029971A1 (es) * 1997-12-04 1999-06-17 Francisco Alonso Fullola Dosificador automatico para productos higienico-desinfectantes para uso cotidiano para las personas
ES2137882A1 (es) * 1997-12-04 1999-12-16 Fullola Francisco Alonso Dosificador automatico para productos higienico-desinfectantes para uso cotidiano de las personas.
EP1087067A1 (de) * 1999-09-23 2001-03-28 Buck-Chemie GmbH . Abgabevorrichtung für die Abgabe eines Wirkstoffes
DE19945598B4 (de) * 1999-09-23 2008-03-13 Buck- Chemie Gmbh Abgabevorrichtung für die Abgabe eines Wirkstoffes

Also Published As

Publication number Publication date
BR8605541A (pt) 1987-08-11
JPS62113020A (ja) 1987-05-23
ES1002069U (es) 1988-06-01
DK532486D0 (da) 1986-11-07
GB8626490D0 (en) 1986-12-03
GB2182958A (en) 1987-05-28
EP0222607A3 (de) 1987-08-19
ZW22486A1 (en) 1987-06-24
AU584473B2 (en) 1989-05-25
DK532486A (da) 1987-05-10
ES1002069Y (es) 1989-01-16
NZ218213A (en) 1989-01-06
AU6487686A (en) 1987-05-14
GB2182958B (en) 1989-01-25
GB8527695D0 (en) 1985-12-11
ZA868493B (en) 1987-07-29
PT83703A (pt) 1987-06-17

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