EP1815776A1 - Flüssigkeitsspender - Google Patents

Flüssigkeitsspender Download PDF

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Publication number
EP1815776A1
EP1815776A1 EP07101605A EP07101605A EP1815776A1 EP 1815776 A1 EP1815776 A1 EP 1815776A1 EP 07101605 A EP07101605 A EP 07101605A EP 07101605 A EP07101605 A EP 07101605A EP 1815776 A1 EP1815776 A1 EP 1815776A1
Authority
EP
European Patent Office
Prior art keywords
reservoir
pump
liquid product
housing
dispenser
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.)
Granted
Application number
EP07101605A
Other languages
English (en)
French (fr)
Other versions
EP1815776B1 (de
Inventor
Berend Douwes
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.)
Technical Concepts Bentfield BV
Original Assignee
Technical Concepts Bentfield BV
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 Technical Concepts Bentfield BV filed Critical Technical Concepts Bentfield BV
Priority to EP07101605A priority Critical patent/EP1815776B1/de
Priority to PL07101605T priority patent/PL1815776T3/pl
Publication of EP1815776A1 publication Critical patent/EP1815776A1/de
Application granted granted Critical
Publication of EP1815776B1 publication Critical patent/EP1815776B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
    • A47K5/1204—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a rigid dispensing chamber and pistons
    • A47K5/1207—Dispensing from the bottom of the dispenser with a vertical piston
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
    • A47K5/1204—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a rigid dispensing chamber and pistons

Definitions

  • the invention relates to a dispenser for dispensing a fluid product, comprising:
  • Fluid product dispensers of the type described in the opening paragraph are well known, and are described inter alia in US 5,445,288 (Deb), for example.
  • Such dispensers are, for example, employed in washrooms, toilets, kitchens, hospitals, surgeries, hair/beauty salons, workshops and factories.
  • Such dispensers are mounted to a wall, often in the vicinity of a basin, bath, shower or toilet bowl; alternatively, such dispensers may be freestanding, and may be placed on a shelf, worktop or wash hand basin, or a trolley.
  • the actuating means are typically operated by hand, arm or elbow so as to dispense a quantity of fluid product.
  • this fluid product will be dispensed into the operator's hand, or onto a carrier such as a cloth, after which the fluid product is rubbed onto the skin, or is applied from said carrier onto a surface to be treated, such as a metal or ceramic surface to be cleaned, for example.
  • the reservoir in such a dispenser is collapsible, and because the pump withdraws liquid product from the reservoir without an air return (or substantial flow of other gas) back into the reservoir, the reservoir will steadily contract in upon itself as more and more of the liquid product is withdrawn by the pump. Such contraction tends to push liquid product out of the reservoir, helping to ensure that the reservoir is substantially emptied before it has to be replenished.
  • a certain amount of liquid product nevertheless tends to get trapped in the reservoir, particularly along folds, seams and/or gussets that may be present in the reservoir, or in internal corners; such product is essentially wasted, since it is discarded with the old reservoir once a new reservoir is loaded into the housing.
  • the quantity of liquid product wasted in this manner depends inter alia on the viscosity of the liquid product.
  • Tensioning the reservoir in the manner according to the invention basically amounts to a constant attempt to negate the bulging of the reservoir. Since such bulging is caused by the act of (partially) filling an empty reservoir that is relatively flat to start off with, a constant attempt to negate this bulging thus amounts to a constant attempt to revert the reservoir to flatness and emptiness.
  • the tensioning means in the housing according to the invention actively squeeze liquid product out of the reservoir, rather than just passively relying on gravity to cause as much liquid product as possible to migrate toward the pump.
  • the tensioning means comprise suspending means for suspending the reservoir by a first extremity so that it hangs under the force of gravity, the pump being attached to a second extremity of the reservoir located opposite the first extremity. Because the reservoir is hung up in the housing - rather than, for example, sitting on a retaining shelf - the weight of the reservoir and its contents apply a tensioning force to the reservoir along the vertical direction (second direction), thus serving to counteract the (net) outward bulging of the reservoir in the horizontal direction (first direction).
  • the suspending means comprise a drum that can be rotated about a substantially horizontal axis.
  • the drum is rotationally/torsionally biased (e.g. using a spiral spring, elastic belt, etc.) in a first rotational sense, and the top of the reservoir is hung on the drum in such a manner that the weight of the reservoir (+ liquid product within) exerts a moment on the drum in a second rotational sense opposite to the first rotational sense.
  • a thick soap solution comprising a suspended granulate solid
  • commercially available examples of such a solution/suspension include Deb Swarfega TM , Stockhausen STOKO Solopol TM and CWS Abrasiva TM .
  • the viscosity of this (tixotropic) solution/suspension was measured to be of the order of 10 5 centipoise in static measurements, and of the order of 4 x 10 3 centipoise in dynamic measurements.
  • the employed reservoir was a plastic foil bag having two major opposing flat surfaces, which were sealed together at the head and foot and were joined at the sides by foil sheet parts with a central longitudinal folding seam; in this manner, the reservoir could collapse flat in a concertina-like fashion.
  • This reservoir was suspended from a drum arrangement as set forth in the preceding paragraph. It was observed in this instance that as little as 0.9-2% of the initial load of viscous liquid product got trapped in the reservoir, which represents an improvement of a factor of at least three (and, in many cases, a factor of eight or more) compared to the results obtained using a non-inventive dispenser (see above).
  • the efficiency of the pump In general, in order to empty the reservoir to as great an extent as possible, the efficiency of the pump must be kept as high as possible. This means that, when the pump is actuated so as to dispense fluid, the liquid inlet valve must be tightly shut, so as to minimize migration of liquid product from the pump back into the reservoir.
  • a build-up of granulates within the liquid inlet valve e.g. between a ball bearing / flap member / top hat member and a corresponding valve seat, or in the throat of a duckbill valve
  • a build-up of granulates within the liquid inlet valve can prevent the valve from shutting properly, and this can result in the creation of a substantial dead volume upstream of the valve.
  • the pump when the assembly of reservoir + pump is accommodated in the housing, the pump is located at the underside of the reservoir.
  • a throat may be provided at (or proximal to) the lowest point of the reservoir, and this throat may be connected to the liquid inlet valve of the pump (see previous paragraph) using a duct; see, for example, the abovementioned US 5,732,853 (Bentfield).
  • the distance H between the liquid inlet valve of the pump and the point at which the pump is attached to the reservoir is preferably kept as short as possible; for example, in the previous sentence, said duct is ideally kept as short as possible (without sacrificing practicality). In this manner, pressure loss in the head H is kept to a minimum, so that the ability of the pump to suck liquid product out of the reservoir is optimized. This helps achieve a further reduction in the amount of liquid product trapped in the reservoir.
  • the actuating means comprise at least one of:
  • Figure 1 renders a schematic perspective view of part of a dispenser 10 for dispensing a fluid product, in accordance with the prior art.
  • Figure 1 shows a housing 12, which can be mounted to a wall of a washroom, for example.
  • the housing 12 accommodates an assembly C that comprises a collapsible reservoir 20, for containing a liquid product, and an attached pump 22; these items are only visible in Figure 2, and will be discussed later in more detail.
  • Actuating means 14 are movably connected to the housing 12, and can be actuated so as to operate said pump 22.
  • an inspection window 16 which allows the amount of liquid product in the reservoir 20 to be seen from outside.
  • An aperture 18 allows insertion of a tool with the aid of which the housing 12 can be unlocked and opened, allowing access to the assembly C (reservoir 20 + pump 22) located within.
  • the housing 12 is made from any suitable rigid material, such as metal or a plastic, for example.
  • Figure 2 renders a cross-sectional view of the subject of Figure 1, taken along the line A-A'.
  • the reservoir 20 is now visible, and is here embodied as a flexible plastic container.
  • the liquid product contained in the reservoir 20 may, for example, comprise soap, shower/bath gel, detergent, exfoliating scrub, or mixtures of (certain of) these products.
  • a pump 22 is attached to the underside of the reservoir 20, so as to be able to draw liquid product from within the reservoir 20; since the pump 20 does not replace such withdrawn liquid product by air (or another gas), the reservoir 22 collapses inward as more and more liquid product is withdrawn therefrom.
  • the pump 22 may be any suitable type of pump for the application in question, such as a liquid pump, spray pump or foam pump, for example, and may operate on the basis of a movable piston, bellows and/or membrane, for example. In operation, the pump 22 may directly dispense the liquid contained within the reservoir 20, or may first mix it with air to form a spray or foam, for example. In all cases, the pump 22 dispenses a fluid product from the nozzle 24.
  • the actuating means 14 in this instance are hinged to the housing 12 via a hinge joint 26. This, together with the gap 28 below the actuating means 14, ensures that the actuating means 14 can be swung in and out of the housing 12.
  • An arm 30 connects the actuating means 14 to the pump 22 in such a manner that, when the actuating means 14 are swung into the housing 12 about hinge point 26, arm 30 operates pump 22 so as to dispense a dose of fluid product through the nozzle 24.
  • Biasing means such as spring 32, ensure that the actuating means 14 are urged back into their swung-out position when released.
  • a user depresses the actuating means 14 using his hand palm, lower arm or elbow, for example, and collects the fluid product dispensed from the nozzle 24 in his hand or on a carrier (such as a cloth or tissue); in such applications, the nozzle 24 will generally face substantially downward.
  • a carrier such as a cloth or tissue
  • the pump 22 is removably mounted to a bracket 36 that protrudes from the back wall 34 of the housing 12.
  • This back wall 34 can be provided with screw-holes, magnets, or other means for mounting it to a wall or other surface.
  • a lug 38B protruding from the back wall 34 is a lug 38B, which grips a cooperating lug 38A; however, using a tool inserted through aperture 18, these two lugs 38A, 38B can be disengaged, allowing the housing 12 to be opened, e.g. so as to replace the reservoir 20 and/or pump 22 located inside (this may involve replacing either the entire assembly C as a whole, or replacing the reservoir 20 or pump 22 as parts).
  • the bracket 36 not only supports the pump 22, but also indirectly supports the reservoir 20 from beneath.
  • the reservoir 20 is therefore free to sag downward and bulge sideways. Such free sagging/bulging is conducive to the formation of folds and corners in which liquid product can be trapped as the reservoir 20 collapses in upon itself.
  • Figure 3 renders a longitudinal cross-sectional view of a dispenser 10 according to an embodiment of the current invention.
  • the dispenser 10 comprises a housing 12 for removably accommodating an assembly C comprising a collapsible reservoir 20 and a pump 22 that is connected to the reservoir 20.
  • the current dispenser 10 comprises tensioning means T, whose operation will now be explained.
  • the reservoir 20 in the current case is a plastic foil bag comprising two major opposing surfaces 20a that are sealed together at a first extremity (head) E1 and a second extremity (foot) E2, and are joined at the sides by an arrangement of foil sheet parts 20b with a central longitudinal folding seam 20c. Due to this construction, the reservoir 20 can collapse (substantially) flat in a concertina-like manner, whereby the parts 20a and 20b fold toward one another, hinging inward about the folding seam 20c.
  • the reservoir 20 has a relatively flat form when empty and a relatively bulged form when at least partially filled, whereby bulging of the reservoir along a first direction (the outward arrows F) occurs as a result of corresponding contraction of the reservoir along a complimentary second direction (the inward arrows G).
  • the plastic foil of the parts 20a and 20b may, for example, comprise polyethene (PE), polyamide (PA), polyethene terephthalate (PET), polypropene (PP), ethene-vinyl alcohol polymer (EVOH), or combinations (e.g. sandwiches/laminates) of these materials.
  • the housing 12 comprises tensioning means T for applying an external force to the reservoir 20, which force is tensile along the second direction G.
  • tensioning means T comprise suspending means 46 for suspending the reservoir 20 so that it hangs/dangles in the housing 12 under the force of gravity; this contrasts with the situation in Figure 2, in which the reservoir 20 is supported from beneath.
  • Such hanging suspension of the reservoir 20 under its own weight applies a basic tensile force to the reservoir along the second direction G.
  • the suspending means 46 take the form of a lug in the housing 12, which lug cooperates with (for example) a hook or a hole provided through the sealed extremities of the faces 20a of the bag 20.
  • the skilled artisan could also easily conceive other suspending means 46 for suspending the reservoir 20, e.g. using clamping jaws, Velcro, adhesive tape, etc.
  • suspending the reservoir 20 along a line (or a distribution of points) has been observed to give more satisfactory results than suspending the reservoir 20 at a single point (or relatively confined area).
  • the suspending means 46 are provided on the cylindrical surface of a drum 40 that can be rotated about a substantially horizontal axis; in the drawing, the drum 40 is fitted on a substantially horizontal axle 42 provided at one end of an arm 44 that extends outward from the back wall 34 of the housing 12.
  • This drum 40 is rotationally/torsionally biased about the axle 42 (using biasing means that have not been depicted in the figure, but that may comprise a spiral spring or elastic belt, for example) such that the drum wants to roll in the direction of the arrow H (first rotational sense), which is opposite to the moment (in the second rotational sense) exerted on the drum 42 by the weight of the reservoir 20 (+ liquid product within).
  • biasing means that have not been depicted in the figure, but that may comprise a spiral spring or elastic belt, for example
  • a collar 21a providing flow access to the inside of the reservoir 20.
  • the pump 22 is attached to the reservoir 20 at this point (e.g. by clamping) so that an inlet duct 21b of the pump 22 fits into the collar 21a (see, for example, the construction set forth for this purpose in the abovementioned US 5,732,853 (Bentfield)).
  • a non-return liquid inlet valve 23 for admitting liquid product into the pump 22 from the reservoir 20, the influx of liquid product through the valve 23 occurring along a flow axis I.
  • clamping means 13 provided as part of the housing 12, the pump 22 is held/postured in such a manner that the flow axis I is substantially horizontal.
  • the inventor has observed that, in the case of relatively viscous liquid products (e.g. products with a viscosity in the range 10 3 -10 5 centipoise: see above), the distance H between the liquid inlet valve 23 of the pump 22 and the point 21a at which the pump 22 is attached to the reservoir 20 is preferably kept as short as possible; in the current case, this implies that the inlet duct 21b should have a minimum (practicable) length. In this manner, pressure loss in the head H is kept to a minimum, so that the ability of the pump 22 to suck liquid product out of the reservoir 20 is optimized.
  • relatively viscous liquid products e.g. products with a viscosity in the range 10 3 -10 5 centipoise: see above
  • the distance H between the liquid inlet valve 23 of the pump 22 and the point 21a at which the pump 22 is attached to the reservoir 20 is preferably kept as short as possible; in the current case, this implies that the inlet duct 21b should have a minimum (practicable)
  • the pump 22 in Figure 3 may also be tilted upward from horizontal. If one decides to use the pump 22 at such an above-horizontal angle, then one should generally ensure that:
  • the actuating means 14 merely comprise a cap on the pump 22, which cap can be operated by hand.
  • more elaborate actuating means can also be employed as an alternative to this simple arrangement, as set forth above.
  • a further embodiment of a dispenser 10 according to the present invention is identical to that set forth in Embodiment 1 above, except as regards certain details of the tensioning means T.
  • the drum 40 instead of rotationally biasing the drum 40, it can instead be used as a rotating pulley or a static sliding guide, and a spring or hanging counterweight (neither of which is depicted) can be used to tension the extremity E1 of the reservoir over this pulley/guide.
  • the reservoir 20 instead of using a drum 40, the reservoir 20 can be hung from a spring or other resilient member (not depicted), which will pull the reservoir 20 upward as it becomes lighter (due to removal of liquid product therefrom).

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Telephone Function (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Sampling And Sample Adjustment (AREA)
EP07101605A 2006-02-07 2007-02-01 Flüssigkeitsspender Not-in-force EP1815776B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07101605A EP1815776B1 (de) 2006-02-07 2007-02-01 Flüssigkeitsspender
PL07101605T PL1815776T3 (pl) 2006-02-07 2007-02-01 Dozownik produktów płynnych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06075257 2006-02-07
EP07101605A EP1815776B1 (de) 2006-02-07 2007-02-01 Flüssigkeitsspender

Publications (2)

Publication Number Publication Date
EP1815776A1 true EP1815776A1 (de) 2007-08-08
EP1815776B1 EP1815776B1 (de) 2009-04-15

Family

ID=38985140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101605A Not-in-force EP1815776B1 (de) 2006-02-07 2007-02-01 Flüssigkeitsspender

Country Status (6)

Country Link
US (1) US20080023487A1 (de)
EP (1) EP1815776B1 (de)
AT (1) ATE428339T1 (de)
DE (1) DE602007000867D1 (de)
ES (1) ES2326046T3 (de)
PL (1) PL1815776T3 (de)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
EP2311752A1 (de) * 2009-10-15 2011-04-20 Enoitalia S.p.A Behälter für Getränke, insbesondere Wein, des Bag-in-Box-Typs
WO2011133077A1 (en) * 2010-04-22 2011-10-27 Sca Hygiene Products Ab Pump soap dispenser
US8550307B2 (en) * 2011-03-31 2013-10-08 Brightwell Dispensers Limited Dispensing device with a disposable pump
US20140048562A1 (en) * 2012-08-17 2014-02-20 Meadwestvaco Corporation Pump device and flow control system
WO2014065728A1 (en) * 2012-10-25 2014-05-01 Sca Hygiene Products Ab Dispensing system with the means for detecting liquid level and a collapsible container for such a system.
US9045260B2 (en) * 2013-03-05 2015-06-02 The Coca-Cola Company Beverage dispensing system
WO2015015896A1 (ja) * 2013-07-30 2015-02-05 株式会社ジーシー 印象材自動練和装置
US10264926B2 (en) 2015-02-04 2019-04-23 Gojo Industries, Inc. Collapsible liquid container, fluid dispenser for collapsible liquid container, and method for making collapsible liquid container
WO2017120635A1 (en) * 2016-01-14 2017-07-20 Filipovic Steve Caulking gun

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FR2701646A1 (fr) 1993-02-19 1994-08-26 Provendi Sa Distributeur de produits liquides ou pâteux à commande électromagnétique.
US5445288A (en) 1994-04-05 1995-08-29 Sprintvest Corporation Nv Liquid dispenser for dispensing foam
US5732853A (en) 1992-11-03 1998-03-31 Bentfield Europe B.V. Dosing unit comprising a dispensing device and a container bag unit

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Publication number Priority date Publication date Assignee Title
WO1993005693A1 (en) * 1991-09-13 1993-04-01 Appor Limited Containers and dispensers for the contents thereof
US5732853A (en) 1992-11-03 1998-03-31 Bentfield Europe B.V. Dosing unit comprising a dispensing device and a container bag unit
FR2701646A1 (fr) 1993-02-19 1994-08-26 Provendi Sa Distributeur de produits liquides ou pâteux à commande électromagnétique.
US5445288A (en) 1994-04-05 1995-08-29 Sprintvest Corporation Nv Liquid dispenser for dispensing foam

Also Published As

Publication number Publication date
US20080023487A1 (en) 2008-01-31
ATE428339T1 (de) 2009-05-15
PL1815776T3 (pl) 2009-08-31
DE602007000867D1 (de) 2009-05-28
ES2326046T3 (es) 2009-09-29
EP1815776B1 (de) 2009-04-15

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