EP0758270A1 - Device for generating and dispensing foam - Google Patents

Device for generating and dispensing foam

Info

Publication number
EP0758270A1
EP0758270A1 EP95915809A EP95915809A EP0758270A1 EP 0758270 A1 EP0758270 A1 EP 0758270A1 EP 95915809 A EP95915809 A EP 95915809A EP 95915809 A EP95915809 A EP 95915809A EP 0758270 A1 EP0758270 A1 EP 0758270A1
Authority
EP
European Patent Office
Prior art keywords
foam
chamber
insert
air
piston
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
EP95915809A
Other languages
German (de)
French (fr)
Other versions
EP0758270B1 (en
Inventor
Hermann Reidel
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.)
UHLIG, BERND
Original Assignee
EUREKA DEVELOPMENT Ltd
Eureka Development 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
Family has litigation
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Application filed by EUREKA DEVELOPMENT Ltd, Eureka Development Ltd filed Critical EUREKA DEVELOPMENT Ltd
Publication of EP0758270A1 publication Critical patent/EP0758270A1/en
Application granted granted Critical
Publication of EP0758270B1 publication Critical patent/EP0758270B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D27/00—Shaving accessories
    • A45D27/02—Lathering the body; Producing lather
    • A45D27/10—Lather-producing devices operated by compressed air or by swirling water
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste, or the like
    • A47K5/14—Foam or lather making devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1087—Combination of liquid and air pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1097—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle with means for sucking back the liquid or other fluent material in the nozzle after a dispensing stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply

Definitions

  • the invention relates to a device for producing and dispensing foam, in particular soap foam.
  • Such devices are installed at washing points in, for example, bathrooms and toilets, in order, for example, to produce and dispense a metered amount of soap foam for washing hands.
  • a simple manual operation of the device is sufficient to produce a certain amount of foam and to distribute it at the same time.
  • Devices of this type can be arranged as part of a foam dispenser installed permanently above or at the washing station or as an attachment directly on a liquid storage container.
  • a soap foam dispenser which consists of a housing with a volume-adjustable, cylindrical air chamber and a device arranged coaxially there for the simultaneous delivery of foamable liquid from a container, the device consisting of a is formed in a suction-side immersion piston retractable with a check valve from the actuating element for air compression and both the air chamber and a chamber provided with the check valve are connected in the device to a foaming chamber to which the foam outlet channel connects.
  • the housing part, which surrounds the air chamber serves as an actuating element for the air compression and its conveyance into the foaming chamber, which is arranged in a part of the foam outlet channel attached to the side of the housing.
  • the foam expiration also stops, ie, both in the foaming chamber and in the foam outlet channel, the foam remains, runs out or crusts over time, especially if the device is left unused for a long period of time uses remains.
  • the foam is not sucked back because the air chamber does not receive its air supply through the foam outlet channel, but rather through an opening in the wall of the air chamber.
  • the object of the present invention is to create a foam dispenser which, with a simple construction, makes the subsequent blowing out unnecessary and prevents possible dripping of foam or foam that has become liquid again.
  • the device consists of a housing with a volume-changeable, cylindrical air chamber and a device arranged coaxially thereon for the simultaneous delivery of foamable liquid from a container for air delivery, the device consisting of a valve with a non-return valve from the actuating element for the air compression retractable plunger is formed and both the air chamber and a chamber provided with the check valve are connected in the device to a foaming chamber to which the foam outlet channel connects.
  • a piston with a central insert is arranged in the air chamber, which is firmly connected to the piston. The unit formed from the insert and the piston is supported by a spring against the bottom of the air chamber.
  • an air duct is arranged, which - 3 - Connects the foam chamber, which is arranged centrally in the insert, to the air chamber.
  • the open end of the plunger which is provided with a delivery channel and is displaceable in the device for conveying liquid, protrudes into the insert, directed towards the expansion chamber and firmly connected to it, and a foam suction valve is arranged in the air channel before it opens into the expansion chamber. that connects the air duct with the foam outlet duct.
  • FIG. 1 shows a section through a preferred embodiment of the device.
  • Fig. 2 shows the device of Figure 1 in side view.
  • FIG. 3 separately and in section, the actuating element according to FIG. 1;
  • FIG. 4 shows in section another embodiment for direct arrangement on a liquid storage container; 5 separately and in section the device for conveying liquid;
  • FIG. 6 shows a section through the actuating element for the air and liquid delivery and the foam formation according to FIG. 4.
  • the device according to the invention consists of a housing G with a volume-adjustable, cylindrical air chamber 1 and of a device 2 arranged coaxially thereon for the simultaneous conveyance of foamable liquid from a container V for the purpose of air delivery, the inlet ⁇ direction 2 (see also FIG. 5) is formed from a plunger 5 which can be inserted into a check valve 3 on the suction side by the actuating element 4 for air compression, and both the air chamber 1 and a chamber 6 provided with the check valve 3 in the device 2 are connected to a foaming chamber 8 to which the foam outlet channel 9 connects.
  • a piston 10 with a central insert 11 is arranged, which is firmly connected to the piston 10.
  • the unit formed from insert 11 and piston 10 is supported by a spring 12 against the bottom 13 of the air chamber 1.
  • An air channel 14 is arranged in the insert 11, which connects the foaming chamber 8 arranged centrally in the insert 11 to the air chamber 1.
  • the sleeve-shaped insert 11 forms one piece with the piston 10.
  • the bottom 17 of the insert 11 has openings 14 * and a sleeve 18 which extends to both sides, the part 17 'which projects into the air chamber 1 receives the open end 7 of the plunger 5 and the inward part 17''of the inner one Wall of a part 14 "of the overall annular cylindrical air duct 14, which on the other hand is delimited by a further sleeve 19.
  • This sleeve 19 contains openings 20 above the annular opening 15 for the air, the spaces 21 forming the foaming chamber 8, which is followed by a foaming element 8 'towards the foam outlet channel 9.
  • a third sleeve 22 is arranged above the sleeve 19 and is also firmly seated in the insert 11.
  • a plurality of openings 24 are arranged, which together with an elastic ring 25 form the foam suction valves 16.
  • This hood 26 also has a recess 28 for a drawbar 29 which is adjusted in the direction of arrow P by a hand lever 30 when it rotates in the direction of arrow P 'about its axis 31 on the housing 1.
  • the piston 10 is pressed into the air chamber 1 and compresses the air that passes through the openings 14 'into the air duct 14, 14 "and from there to the annular mouth 15 into the space 21 (premixing chamber), where the air with the When the entire unit consisting of piston 10 and insert 11 is pressed down, the plunger 5 (see FIG. 5) firmly connected to it is also pressed into the chamber 6.
  • the delivery channel 5 becomes 'leading transverse bores 5 ", and the liquid displaced by the plunger rises in the delivery channel 5' upwards into the foaming chamber 8.
  • the foam formed in this then emerges at the end of the foam outlet channel 9 and is taken over by the user's palm there.
  • the lever 30 is released, the unit consisting of the piston 10, insert 11 and plunger 5 is reset by the spring 12.
  • This reset process causes new liquid to enter the chamber 6 of the device 2 is sucked in that a negative pressure is created in the air chamber 1, which opens the foam return valves 16, so that the negative pressure via bore 27 can also take effect in the foam outlet channel and the residual foam located there in the cavities of the insert 11, ie in sucks back the expansive part of the air duct 14, from which the foam or any liquid which may have regressed is then carried away by the air the next time it is actuated.
  • FIGS. 4 and 6 which is intended for a direct attachment to a liquid container V, works on the same principle. Corresponding parts of this embodiment are provided with corresponding reference numerals, so that a repeated description is unnecessary.
  • the housing G in the embodiment according to FIG. 1 is here formed by the neck H of the liquid container V, into which the air chamber 1 is screwed.
  • a stop 32 in the embodiment according to FIG. 1, which limits the stroke of the piston 10 with its insert 11, is formed in the embodiment according to FIG. 4 by a stop ring 34 screwed onto the wall 33 of the air chamber 1.
  • FIGS. 1 and 5 show with regard to the devices 2, these are largely identical, apart from slightly different construction details.
  • the plunger 5 slides in a stationary sealing sleeve 35, and the check valve 3 also has a spring 36, which likewise participates in the resetting process.
  • the air inflow opening 14 ' represents an annular gap in the embodiment according to FIGS. 4 and 6, while in the embodiment according to FIGS. 1 and 3 it is formed from several such openings 14' which are in relation to one another the center axis 37 of the upper semicircle 38 are distributed, which in this embodiment ensures that foam which is sucked back cannot get into the air chamber 1. - 7 -
  • the air chamber 1 with the unit consisting of piston 10 and insert 11 sits directly in the neck H of the liquid container V
  • the liquid container V sits in a neck H of the housing G provided with a ventilation valve 39, in which, as shown, the device 2 with the air chamber 1 is arranged, ie in this case the foamable liquid is sucked out of the chamber 40 of the housing G.

Landscapes

  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Closures For Containers (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Detergent Compositions (AREA)

Abstract

PCT No. PCT/DE95/00547 Sec. 371 Date Nov. 1, 1996 Sec. 102(e) Date Nov. 1, 1996 PCT Filed Apr. 24, 1995 PCT Pub. No. WO95/29759 PCT Pub. Date Nov. 9, 1995The invention relates to a device for generating and metering foam, especially foamed soap. To prevent further dispensing of drips of residual foam in a foam outlet channel after the quantity required has been supplied, the device is constructed in such a way that the underpressure subsisting on the return stroke of a piston in an air chamber is effective in the foam outlet channel and sucks residual foam back.

Description

Gerät zur Erzeugung und Abgabe von Schaum Device for producing and dispensing foam
Die Erfindung bezieht sich auf ein Gerät zur Erzeugung und Ab¬ gabe von Schaum, insbesondere Seifenschaum.The invention relates to a device for producing and dispensing foam, in particular soap foam.
Solche Geräte werden an Waschstellen von bspw. Bädern und Toi¬ letten installiert, um bspw. zum Händewaschen eine dosierte Menge von Seifenschaum zu erzeugen und abzugeben. Dafür genügt eine einfache Betätigung des Gerätes per Hand, um eine bestimmte Menge von Schaum zu erzeugen und gleichzeitig auszuteilen. Der¬ artige Geräte können Teil eines fest über oder an der Wasch¬ stelle installierten Schaumspenders oder auch als Aufsatz unmit¬ telbar auf einem Flüssigkeitsvorratsbehälter angeordnet sein.Such devices are installed at washing points in, for example, bathrooms and toilets, in order, for example, to produce and dispense a metered amount of soap foam for washing hands. A simple manual operation of the device is sufficient to produce a certain amount of foam and to distribute it at the same time. Devices of this type can be arranged as part of a foam dispenser installed permanently above or at the washing station or as an attachment directly on a liquid storage container.
Nach dem US-Patent 1,896,624 ist ein Seifenschaumspender be¬ kannt, der aus einem Gehäuse mit einer volumenveränderbaren, zy¬ lindrischen Luftkammer und aus einer koaxial daran angeordneten Einrichtung für die zur Luftförderung gleichzeitige Förderung verschäumbarer Flüssigkeit aus einem Behälter besteht, wobei die Einrichtung aus einem in eine saugseitige mit Rückschlagventil vom Betätigungselement für die Luftkompression einfahrbaren Tauchkolben gebildet ist und sowohl die Luftkammer als auch eine mit dem Rückschlagventil versehene Kammer in der Einrichtung mit einer Verschäumungskammer in Verbindung stehen, an die sich der Schaumauslaßkanal anschließt. Der Gehäuseteil, der die Luftkam¬ mer umschließt, dient dabei als Betätigungselement für die Luft¬ kompression und deren Förderung in die Verschäumungskammer, die in einem Teil des seitlich am Gehäuse angesetzten Schaumauslaß- kanales angeordnet ist. Mit Beendigung des Kompressionshubes für die Luft hört auch der Schaumaustrieb auf, d.h., sowohl in der Verschäumungskammer als auch im Schaumauslaßkanal bleibt gebil¬ deter Schaum stehen, läuft aus oder verkrustet im Laufe der Zeit, insbesondere dann, wenn das Gerät über längere Zeit unbe¬ nutzt bleibt. Ein Rücksaugen des Schaumes erfolgt nicht, weil die Luftkammer ihren Luftnachschub nicht durch den Schaumausla߬ kanal erhält, sondern durch eine Öffnung in der Wand der Luft¬ kammer. Dieses Problem ist mit einem Schaumspender nach dem europäischen Patent 0 019 582 dadurch zu lösen versucht worden, daß nach Schaumabgabe in der Mischkammer und im Schaumauslaßkanal ver¬ bleibender Restschaum ausgeblasen wird. Dies muß allerdings durch eine besondere Konstruktion des Gerätes erkauft werden, die es ermöglicht, zunächst Schaum zu erzeugen und auszutreiben, um dann anschließend mit einem nochmaligen Luftstoß den Rest¬ schaum auszutreiben, was in der Regel immer mit einem "Nachkleckern" von Schaum verbunden ist. Abgesehen davon ist eine besondere Luftpolsterkammer erforderlich, um die dort aus einem Vorratsbehälter zugeflossene Flüssigkeit mit einem Ventil¬ schieberkolben in die im Spendergehäuse stationär angeordnete Verschäumungskammer treiben zu können, wobei der Schieberkolben exakt passend in einem Zylinder geführt werden muß.According to US Pat. No. 1,896,624, a soap foam dispenser is known which consists of a housing with a volume-adjustable, cylindrical air chamber and a device arranged coaxially there for the simultaneous delivery of foamable liquid from a container, the device consisting of a is formed in a suction-side immersion piston retractable with a check valve from the actuating element for air compression and both the air chamber and a chamber provided with the check valve are connected in the device to a foaming chamber to which the foam outlet channel connects. The housing part, which surrounds the air chamber, serves as an actuating element for the air compression and its conveyance into the foaming chamber, which is arranged in a part of the foam outlet channel attached to the side of the housing. With the end of the compression stroke for the air, the foam expiration also stops, ie, both in the foaming chamber and in the foam outlet channel, the foam remains, runs out or crusts over time, especially if the device is left unused for a long period of time uses remains. The foam is not sucked back because the air chamber does not receive its air supply through the foam outlet channel, but rather through an opening in the wall of the air chamber. An attempt was made to solve this problem with a foam dispenser according to European patent 0 019 582 by blowing out residual foam remaining in the mixing chamber and in the foam outlet channel after the foam has been dispensed. However, this has to be bought through a special construction of the device, which makes it possible to first generate and expel foam, and then to expel the residual foam with a repeated blast of air, which is usually always associated with a "sticking" of foam . Apart from this, a special air cushion chamber is required in order to be able to drive the liquid flowing there from a storage container with a valve spool into the foaming chamber which is stationary in the dispenser housing, the spool having to be guided exactly in a cylinder.
Ausgehend von einem Schaumspender nach dem US-Patent 1,896,624 liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Schaumspender zu schaffen, der bei einfacher Konstruktion das nachträgliche Ausblasen entbehrlich macht und ein eventuelles Nachtropfen von Schaum oder wieder zu Flüssigkeit gewordenem Schaum verhindert.Starting from a foam dispenser according to US Pat. No. 1,896,624, the object of the present invention is to create a foam dispenser which, with a simple construction, makes the subsequent blowing out unnecessary and prevents possible dripping of foam or foam that has become liquid again.
Diese Aufgabe ist durch ein Gerät nach der vorliegenden Erfin¬ dung mit folgenden Merkmalen gelöst:This object is achieved by a device according to the present invention with the following features:
Das Gerät besteht aus einem Gehäuse mit einer volumenveränderba¬ ren, zylindrischen Luftkammer und aus einer koaxial daran ange¬ ordneten Einrichtung für die zur Luftförderung gleichzeitige Förderung verschäumbarer Flüssigkeit aus einem Behälter, wobei die Einrichtung aus einem in eine saugseitig mit Rückschlagven¬ til vom Betätigungselement für die Luftkompression einfahrbaren Tauchkolben gebildet ist und sowohl die Luftkammer als auch eine mit dem Rückschlagventil versehene Kammer in der Einrichtung mit einer Verschäumungskammer in Verbindung stehen, an die sich der Schaumauslaßkanal anschließt. Dabei ist in der Luftkammer ein Kolben mit einem zentralen Einsatz angeordnet, der fest mit dem Kolben verbunden ist. Die aus Einsatz und Kolben gebildete Ein¬ heit ist mit einer Feder gegen den Boden der Luftkammer abge¬ stützt. Im Einsatz ist ein Luftkanal angeordnet, der die - 3 - zentrisch im Einsatz angeordnete Verschäumungskammer mit der Luftkammer verbindet. In den Einsatz ragt, gegen die Verschäu¬ mungskammer gerichtet und fest mit diesem verbunden, das offene Ende des mit einem Förderkanal versehenen, in der Einrichtung zur Flüssigkeitsförderung verschieblichen Tauchkolbens ein und im Luftkanal ist vor dessen Einmündung in die Verschäumungskam¬ mer ein Schaumrucksaugventil angeordnet, das den Luftkanal mit dem Schaumauslaßkanal verbindet.The device consists of a housing with a volume-changeable, cylindrical air chamber and a device arranged coaxially thereon for the simultaneous delivery of foamable liquid from a container for air delivery, the device consisting of a valve with a non-return valve from the actuating element for the air compression retractable plunger is formed and both the air chamber and a chamber provided with the check valve are connected in the device to a foaming chamber to which the foam outlet channel connects. Here, a piston with a central insert is arranged in the air chamber, which is firmly connected to the piston. The unit formed from the insert and the piston is supported by a spring against the bottom of the air chamber. In use, an air duct is arranged, which - 3 - Connects the foam chamber, which is arranged centrally in the insert, to the air chamber. The open end of the plunger, which is provided with a delivery channel and is displaceable in the device for conveying liquid, protrudes into the insert, directed towards the expansion chamber and firmly connected to it, and a foam suction valve is arranged in the air channel before it opens into the expansion chamber. that connects the air duct with the foam outlet duct.
Abgesehen davon, daß beim erfindungsgemäßen Schaumspender alle zur Luftzufuhr und Schaumbildung erforderlichen Elemente im bzw. am Betätigungselement für die Volumenänderung der Luftkammer konzentriert sind, und zwar auch der Schaumauslaßkanal, ist mit diesem Schaumspender der zwangsläufig von der Feder bewirkte Rückhub ausgenutzt, um den dabei entstehenden Sog auf den Schaumauslaßkanal wirksam werden zu lassen und darin befindli¬ chen Restschaum zurückzusaugen. Es erfolgt also weder ein Folge¬ ausstoß von Schaum durch Ausblasen wie beim Schaumspender nach dem europäischen Patent 0 019 582 noch ein Nachtropfen von Schaum oder von wieder zu Flüssigkeit gewordenem Schaum, was beim Schaumspender nach dem US-Patent 1,896,624 möglich ist.Apart from the fact that in the foam dispenser according to the invention all the elements required for air supply and foam formation are concentrated in or on the actuating element for changing the volume of the air chamber, including the foam outlet channel, the return stroke which is inevitably brought about by the spring is used with this foam dispenser in order to avoid the resulting stroke Suction on the foam outlet channel to be effective and suck back residual foam contained therein. There is therefore neither a subsequent ejection of foam by blowing out, as in the foam dispenser according to European Patent 0 019 582, nor dripping of foam or foam which has become liquid again, which is possible with the foam dispenser according to US Patent 1,896,624.
Das Gerät nach der Erfindung und vorteilhafte Ausführungsformen werden nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The device according to the invention and advantageous embodiments are explained below with reference to the drawing of exemplary embodiments.
Es zeigtIt shows
Fig. 1 einen Schnitt durch eine bevorzugte Ausführungsform des Gerätes;1 shows a section through a preferred embodiment of the device.
Fig. 2 das Gerät gemäß Fig. 1 in Seitenansicht;Fig. 2 shows the device of Figure 1 in side view.
Fig. 3 separat und im Schnitt das Betätigungselement gemäß Fig. 1;FIG. 3, separately and in section, the actuating element according to FIG. 1;
Fig. 4 im Schnitt eine andere Ausführungsform zur Direktanord¬ nung auf einem Flüssigkeitsvorratsbehälter; Fig. 5 separat und im Schnitt die Einrichtung zur Flüssig- keitsförderung;4 shows in section another embodiment for direct arrangement on a liquid storage container; 5 separately and in section the device for conveying liquid;
Fig. 6 vergrößert einen Schnitt durch das Betätigungselement für die Luft- und Flüssigkeitsförderung und die Schaum¬ bildung gemäß Fig. 4.FIG. 6 shows a section through the actuating element for the air and liquid delivery and the foam formation according to FIG. 4.
Wie aus Fig. 1 ersichtlich, besteht das erfindungsgemäße Gerät aus einem Gehäuse G mit einer volumenveränderbaren, zylindri¬ schen Luftkammer 1 und aus einer koaxial daran angeordneten Ein¬ richtung 2 für die zur Luftförderung gleichzeitige Förderung verschäumbarer Flüssigkeit aus einem Behälter V, wobei die Ein¬ richtung 2 (siehe auch Fig. 5) aus einem in eine saugseitig mit Rückschlagventil 3 vom Betätigungselement 4 für die Luftkompres¬ sion einfahrbaren Tauchkolben 5 gebildet ist und sowohl die Luftkammer 1 als auch eine mit dem Rückschlagventil 3 versehene Kammer 6 in der Einrichtung 2 mit einer Verschäumungskammer 8 in Verbindung stehen, an die sich der Schaumauslaßkanal 9 an¬ schließt. In der Luftkammer 1 ist ein Kolben 10 mit einem zen¬ tralen Einsatz 11 angeordnet, der fest mit dem Kolben 10 verbun¬ den ist. Die aus Einsatz 11 und Kolben 10 gebildete Einheit ist mit einer Feder 12 gegen den Boden 13 der Luftkammer 1 abge¬ stützt. Im Einsatz 11 ist ein Luftkanal 14 angeordent, der die zentrisch im Einsatz 11 angeordnete Verschäumungskammer 8 mit der Luftkammer 1 verbindet. In den Einsatz 11 ragt, gegen die Verschäumungskammer 8 gerichtet und fest mit diesem verbunden, das offene Ende 7 des mit einem Förderkanal 5' versehenen, in der Einrichtung 2 zur Flüssigkeitsförderung verschieblichen Tauchkolbens 5 ein, und ferner ist im Luftkanal 14 vor dessen Einmündung 15 in die Verschäumungskammer 8 ein Schaumrucksaug¬ ventil 16 angeordnet, das den Luftkanal 14 mit dem Schaumausla߬ kanal 9 verbindet.As can be seen from FIG. 1, the device according to the invention consists of a housing G with a volume-adjustable, cylindrical air chamber 1 and of a device 2 arranged coaxially thereon for the simultaneous conveyance of foamable liquid from a container V for the purpose of air delivery, the inlet ¬ direction 2 (see also FIG. 5) is formed from a plunger 5 which can be inserted into a check valve 3 on the suction side by the actuating element 4 for air compression, and both the air chamber 1 and a chamber 6 provided with the check valve 3 in the device 2 are connected to a foaming chamber 8 to which the foam outlet channel 9 connects. In the air chamber 1, a piston 10 with a central insert 11 is arranged, which is firmly connected to the piston 10. The unit formed from insert 11 and piston 10 is supported by a spring 12 against the bottom 13 of the air chamber 1. An air channel 14 is arranged in the insert 11, which connects the foaming chamber 8 arranged centrally in the insert 11 to the air chamber 1. The open end 7 of the plunger 5, which is provided with a conveying channel 5 ′ and is displaceable in the device 2 for conveying liquid, protrudes into the insert 11, directed towards the foaming chamber 8 and firmly connected to it, and furthermore in the air channel 14 before its mouth 15 in the foaming chamber 8, a foam suction valve 16 is arranged, which connects the air duct 14 with the foam outlet duct 9.
Aus Gründen einer einfachen Herstellung ist die aus Kolben 10 und Einsatz 11 gebildete Einheit, die insgesamt das Betätigungs¬ element 4 für die Volumenänderung der Luftkammer 1 darstellt, aus mehreren Teilen gebildet, die aber alle fest miteinander verbunden sind. Wie aus Übersichtsgründen separat in Fig. 3 dargestellt, bildet der hülsenförmige Einsatz 11 mit dem Kolben 10 ein Stück. Der Boden 17 des Einsatzes 11 weist Öffnungen 14* und eine sich nach beiden Seiten erstreckende Hülse 18 auf, deren in die Luftkammer 1 ragendes Teil 17' das offene Ende 7 des Tauchkolbens 5 auf¬ nimmt und deren nach innen gerichtetes Teil 17" die innere Wand eines Teiles 14" des insgesamt ringzylindrischen Luftkanales 14 bildet, der andererseits von einer weiteren Hülse 19 begrenzt wird. Diese Hülse 19 enthält über der ringförmigen Einmündung 15 für die Luft Öffnungen 20, wobei die Räume 21 die Verschäumungskammer 8 bilden, der ein Verschäumungselement 8' zum Schaumauslaßkanal 9 hin nachgeordnet ist. Über der Hülse 19 ist eine dritte Hülse 22 angeordnet, die ebenfalls fest im Ein¬ satz 11 sitzt. Im Boden 23 dieser Hülse 22 sind mehrere Öffnun¬ gen 24 angeordnet, die zusammen mit einem elastischen Ring 25 die Schaumrücksaugventile 16 bilden. Auf dem ganzen Einsatz 11 sitzt eine Haube 26, die auch den Schaumauslaßkanal 9 enthält, von dem eine Saugbohrung 27 die Saugverbindung zu den Schaum- rücksaugventilen 16 herstellt. Diese Haube 26 weist auch eine Ausnehmung 28 für einen Zugbügel 29 auf, der in Pfeilrichtung P von einem Handhebel 30 verstellt wird, wenn sich dieser in Pfeilrichtung P' um seine Achse 31 am Gehäuse 1 dreht. Dabei wird der Kolben 10 in die Luftkammer 1 gedrückt und komprimiert die Luft, die durch die Öffnungen 14' in die Luftführungskanäle 14, 14" und von dort zu der ringförmigen Einmündung 15 in den Raum 21 (Vormischkammer) gelangt, wo die Luft mit der zu ver¬ schäumenden Flüssigkeit zusammentrifft. Mit dem Niederdrücken der ganzen Einheit aus Kolben 10 und Einsatz 11 wird auch der damit fest verbundene Tauchkolben 5 (siehe Fig. 5) in die Kammer 6 gedrückt. Beim Eintauchen des Tauchkolbens 5 werden zum För¬ derkanal 5' führende Querbohrungen 5" freigestellt, und die vom Tauchkolben verdrängte Flüssigkeit steigt im Förderkanal 5' nach oben in die Verschäumungskammer 8. Der in dieser gebildete Schaum tritt dann am Ende des Schaumauslaßkanales 9 aus und wird dort vom Handteller des Benutzers übernommen. Sobald der Hebel 30 losgelassen wird, stellt sich die Einheit aus Kolben 10, Ein¬ satz 11 und Tauchkolben 5 durch die Feder 12 wieder zurück. Die¬ ser Rückstellvorgang bewirkt, daß neue Flüssigkeit in die Kammer 6 der Einrichtung 2 gesaugt wird, daß in der Luftkammer 1 ein Unterdruck entsteht, der die Schaumrücksaugventile 16 öffnet, so daß der Unterdruck via Bohrung 27 auch im Schaumauslaßkanal wirksam werden kann und den dort befindlichen Restschaum in die Hohlräume des Einsatzes 11, d.h., in den weiträumigen Teil des Luftkanales 14 zurücksaugt, aus dem dann der Schaum oder die ggf. rückgebildete Flüssigkeit bei der nächsten Betätigung wie¬ der von der Luft mitgerissen wird.For reasons of simple manufacture, the unit formed from the piston 10 and insert 11, which overall represents the actuating element 4 for changing the volume of the air chamber 1, is formed from several parts, but all of which are firmly connected to one another. As shown separately in FIG. 3 for reasons of clarity, the sleeve-shaped insert 11 forms one piece with the piston 10. The bottom 17 of the insert 11 has openings 14 * and a sleeve 18 which extends to both sides, the part 17 'which projects into the air chamber 1 receives the open end 7 of the plunger 5 and the inward part 17''of the inner one Wall of a part 14 "of the overall annular cylindrical air duct 14, which on the other hand is delimited by a further sleeve 19. This sleeve 19 contains openings 20 above the annular opening 15 for the air, the spaces 21 forming the foaming chamber 8, which is followed by a foaming element 8 'towards the foam outlet channel 9. A third sleeve 22 is arranged above the sleeve 19 and is also firmly seated in the insert 11. In the bottom 23 of this sleeve 22, a plurality of openings 24 are arranged, which together with an elastic ring 25 form the foam suction valves 16. On the entire insert 11 there is a hood 26, which also contains the foam outlet channel 9, from which a suction bore 27 establishes the suction connection to the foam return valves 16. This hood 26 also has a recess 28 for a drawbar 29 which is adjusted in the direction of arrow P by a hand lever 30 when it rotates in the direction of arrow P 'about its axis 31 on the housing 1. The piston 10 is pressed into the air chamber 1 and compresses the air that passes through the openings 14 'into the air duct 14, 14 "and from there to the annular mouth 15 into the space 21 (premixing chamber), where the air with the When the entire unit consisting of piston 10 and insert 11 is pressed down, the plunger 5 (see FIG. 5) firmly connected to it is also pressed into the chamber 6. When the plunger 5 is immersed, the delivery channel 5 becomes 'leading transverse bores 5 ", and the liquid displaced by the plunger rises in the delivery channel 5' upwards into the foaming chamber 8. The foam formed in this then emerges at the end of the foam outlet channel 9 and is taken over by the user's palm there. As soon as the lever 30 is released, the unit consisting of the piston 10, insert 11 and plunger 5 is reset by the spring 12. This reset process causes new liquid to enter the chamber 6 of the device 2 is sucked in that a negative pressure is created in the air chamber 1, which opens the foam return valves 16, so that the negative pressure via bore 27 can also take effect in the foam outlet channel and the residual foam located there in the cavities of the insert 11, ie in sucks back the expansive part of the air duct 14, from which the foam or any liquid which may have regressed is then carried away by the air the next time it is actuated.
Nach dem gleichen Prinzip arbeitet das in den Fig. 4 und 6 dar¬ gestellte Gerät, das für einen Direktaufsatz auf einen Flüssig¬ keitsbehälter V bestimmt ist. Entsprechende Teile dieser Aus¬ führungsform sind mit entsprechenden Bezugszeichen versehen, so daß eine nochmalige Beschreibung entbehrlich ist.The device shown in FIGS. 4 and 6, which is intended for a direct attachment to a liquid container V, works on the same principle. Corresponding parts of this embodiment are provided with corresponding reference numerals, so that a repeated description is unnecessary.
Das Gehäuse G bei der Ausführungsform nach Fig. 1 wird hierbei vom Hals H des Flüssigkeitsbehälters V gebildet, in den die Luftkammer 1 eingeschraubt ist. Ein Anschlag 32 bei der Ausfüh¬ rungsform nach Fig. 1, der den Hub des Kolbens 10 mit seinem Einsatz 11 begrenzt, ist bei der Ausführungsform nach Fig. 4 durch einen auf die Wand 33 der Luftkammer 1 aufgeschraubten An- schlagring 34 gebildet.The housing G in the embodiment according to FIG. 1 is here formed by the neck H of the liquid container V, into which the air chamber 1 is screwed. A stop 32 in the embodiment according to FIG. 1, which limits the stroke of the piston 10 with its insert 11, is formed in the embodiment according to FIG. 4 by a stop ring 34 screwed onto the wall 33 of the air chamber 1.
Wie ein Vergleich der Fig. 1 und 5 bezüglich der Einrichtungen 2 zeigt, sind diese, von geringfügig unterschiedlichen konstrukti¬ ven Details abgesehen, weitgehend identisch. Hier wie dort glei¬ tet der Tauchkolben 5 in einer stationären Dichtungsmanschette 35, und auch das Rückschlagventil 3 weist eine Feder 36 auf, die sich ebenfalls am Rückstellvorgang beteiligt.As a comparison of FIGS. 1 and 5 shows with regard to the devices 2, these are largely identical, apart from slightly different construction details. Here and there, the plunger 5 slides in a stationary sealing sleeve 35, and the check valve 3 also has a spring 36, which likewise participates in the resetting process.
Die Lufteinströmöffnung 14' stellt bei der Ausführungsform nach den Fig. 4 und 6 einen Ringspalt dar, während diese bei der Aus- führungsform nach den Fig. 1 und 3 aus mehreren solcher Öffnun¬ gen 14' gebildet wird, die auf einem in bezug auf die Mittel¬ achse 37 oberen Halbkreis 38 verteilt angeordnet sind, was bei dieser Ausführungsform dafür sorgt, daß zurückgesaugter Schaum nicht in die Luftkammer 1 gelangen kann. - 7 -The air inflow opening 14 'represents an annular gap in the embodiment according to FIGS. 4 and 6, while in the embodiment according to FIGS. 1 and 3 it is formed from several such openings 14' which are in relation to one another the center axis 37 of the upper semicircle 38 are distributed, which in this embodiment ensures that foam which is sucked back cannot get into the air chamber 1. - 7 -
Während bei der Ausführungsform nach den Fig. 4 und 6 die Luft¬ kammer 1 mit der Einheit aus Kolben 10 und Einsatz 11 unmittel¬ bar im Hals H des Flüssigkeitsbehälters V sitzt, sitzt bei der Ausführungsform nach Fig. 1 der Flüssigkeitsbehälter V in einem Hals H des mit einem Belüftungsventil 39 versehenen Gehäuse G, in dem, wie dargestellt, die Einrichtung 2 mit der Luftkammer 1 angeordnet ist, d.h., die verschäumbare Flüssigkeit wird in die¬ sem Falle aus der Kammer 40 des Gehäuses G angesaugt. While in the embodiment according to FIGS. 4 and 6 the air chamber 1 with the unit consisting of piston 10 and insert 11 sits directly in the neck H of the liquid container V, in the embodiment according to FIG. 1 the liquid container V sits in a neck H of the housing G provided with a ventilation valve 39, in which, as shown, the device 2 with the air chamber 1 is arranged, ie in this case the foamable liquid is sucked out of the chamber 40 of the housing G.

Claims

Patentansprüche: Claims:
1. Gerät zur Erzeugung und dosierten Abgabe von Schaum, insbe¬ sondere Seifenschaum, bestehend aus einem Gehäuse (G) mit einer volumenveränderbaren, zylindrischen Luftkammer (1) und aus einer koaxial daran angeordneten Einrichtung (2) für die zur Luftförderung gleichzeitige Förderung verschäumbarer Flüssigkeit aus einem Behälter (V), wobei die Einrichtung (2) aus einem in eine saugseitig mit Rückschlagventil (3) vom Betätigungselement (4) für die Luftkompression einfahr¬ baren Tauchkolben (5) gebildet ist und sowohl die Luftkammer (1) als auch eine mit dem Rückschlagventil (3) versehene Kammer (6) in der Einrichtung (2) mit einer Verschäumungs¬ kammer (8) in Verbindung stehen, an die sich der Schaumaus¬ laßkanal (9) anschließt, g e k e n n z e i c h n e t d u r c h folgende Merkmale: In der Luftkammer (1) ist ein Kolben (10) mit einem zentra¬ len Einsatz (11) angeordnet, der fest mit dem Kolben (10) verbunden ist; die aus Einsatz (11) und Kolben (10) gebildete Einheit ist mit einer Feder (12) gegen den Boden (13) der Luftkammer (1) abgestützt; im Einsatz (11) ist ein Luftkanal (14) angeordnet, der die zentrisch im Einsatz (11) angeordnete Verschäumungskammer (8) mit der Luftkammer (1) verbindet; in den Einsatz (11) ragt, gegen die Verschäumungskammer (8) gerichtet und fest mit diesem verbunden, das offene Ende (7) des mit einem Förderkanal (5') versehenen, in der Einrich¬ tung (2) zur Flüssigkeitsförderung verschieblichen Tauchkol¬ bens (5) ein und im Luftkanal (14) ist vor dessen Einmündung (15) in die Ver¬ schäumungskammer (8) ein Schaumrucksaugventil (16) angeord¬ net, das den Luftkanal (14) mit dem Schaumauslaßkanal (9) verbindet.1. Device for the production and metered delivery of foam, in particular soap foam, consisting of a housing (G) with a volume-variable, cylindrical air chamber (1) and from a coaxially arranged device (2) for the simultaneous conveying of foamable liquid for air delivery from a container (V), the device (2) being formed from a plunger (5) which is retractable into a suction side with a check valve (3) by the actuating element (4) for the air compression, and both the air chamber (1) and one the chamber (6) provided with the check valve (3) in the device (2) is connected to a foaming chamber (8) to which the foam outlet channel (9) is connected, characterized by the following features: in the air chamber (1 ) a piston (10) is arranged with a central insert (11) which is firmly connected to the piston (10); the unit formed from insert (11) and piston (10) is supported by a spring (12) against the bottom (13) of the air chamber (1); an air duct (14) is arranged in the insert (11), which connects the foaming chamber (8) arranged centrally in the insert (11) to the air chamber (1); protrudes into the insert (11), directed towards the foaming chamber (8) and firmly connected to it, the open end (7) of the plunger which is provided with a conveying channel (5 ') and which is displaceable in the device (2) for conveying liquid bens (5) in and in the air duct (14) before its confluence (15) in the foaming chamber (8) a foam suction valve (16) is arranged, which connects the air duct (14) with the foam outlet duct (9).
2. Gerät nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t . daß der Einsatz (11) in Form einer mit dem Kolben (10) ein Stück bildenden Hülse (18) ausgebildet ist, in deren in die Luftkammer (1) ragendes Teil (17') das offene Ende (7) des Tauchkolbens (5) einragt, das mit einer weiteren Hülse (19) einen Teil (14') des Luftkanales (14) begrenzt und dessen Einmündungen (15) in die Verschäumungskammer (8).2. Device according to claim 1, characterized. that the insert (11) is designed in the form of a sleeve (18) forming a piece with the piston (10), in the part (17 ') protruding into the air chamber (1) of which the open end (7) of the plunger (5) protrudes, which delimits a part (14 ') of the air duct (14) with a further sleeve (19) and its outlets (15) into the foaming chamber (8).
3. Gerät nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß im Einsatz (11) eine dritte Hülse (22) eingesetzt ist, in deren Boden (23) mehrere Öffnungen (24) angeordnet sind, die zusammen mit einem elastischen Ring (25) die Schaum¬ rücksaugventile (16) bilden.3. Apparatus according to claim 2, characterized in that in the insert (11) a third sleeve (22) is inserted, in the bottom (23) of which a plurality of openings (24) are arranged, which together with an elastic ring (25) the foam form suction valves (16).
4. Gerät nach Anspruch 2 oder 3 , d a d u r c h g e k e n n z e i c h n e t , daß auf dem Einsatz (11) eine Haube (26) angeordnet ist, die den Schaumauslaßkanal (9) enthält, der durch eine Bohrung4. Apparatus according to claim 2 or 3, d a d u r c h g e k e n n z e i c h n e t that on the insert (11) a hood (26) is arranged, which contains the foam outlet channel (9) through a bore
(27) mit den Schaumrücksaugventilen (16) pneumatisch in Ver¬ bindung steht.(27) is pneumatically connected to the foam suction valves (16).
5. Gerät nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß die Haube (26) mit einer Ausnehmung (28) zur Aufnahme eines Zugbügels (29) versehen ist, der mit einem am Gehäuse (G) schwenkbar gelagerten Handhebel (30) gekoppelt ist. 5. Apparatus according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the hood (26) is provided with a recess (28) for receiving a pull bracket (29) which is coupled to a pivoted on the housing (G) hand lever (30).
EP95915809A 1994-05-02 1995-04-24 Device for generating and dispensing foam Expired - Lifetime EP0758270B1 (en)

Applications Claiming Priority (3)

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DE9407178U 1994-05-02
DE9407178U DE9407178U1 (en) 1994-05-02 1994-05-02 Device for producing and dispensing foam
PCT/DE1995/000547 WO1995029759A1 (en) 1994-05-02 1995-04-24 Device for generating and dispensing foam

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EP0758270A1 true EP0758270A1 (en) 1997-02-19
EP0758270B1 EP0758270B1 (en) 1998-07-01

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AT (1) ATE167817T1 (en)
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EP0758270B1 (en) 1998-07-01
HU9602996D0 (en) 1997-01-28
WO1995029759A1 (en) 1995-11-09
CZ318196A3 (en) 1997-09-17
JPH09512475A (en) 1997-12-16
DE9407178U1 (en) 1994-07-07
US5779104A (en) 1998-07-14
ZA953449B (en) 1996-01-23
DE59502691D1 (en) 1998-08-06
PL175389B1 (en) 1998-12-31
CA2189151A1 (en) 1995-11-09
ATE167817T1 (en) 1998-07-15
AU697302B2 (en) 1998-10-01
NZ284048A (en) 1998-09-24
CA2189151C (en) 2002-02-12
AU2254595A (en) 1995-11-29
HUT76115A (en) 1997-06-30
PL317016A1 (en) 1997-03-03
CZ288276B6 (en) 2001-05-16
ES2119425T3 (en) 1998-10-01
HU219116B (en) 2001-02-28
DK0758270T3 (en) 1999-02-15

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