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EP0396803B1 - Filter device for a vacuum cleaner - Google Patents

Filter device for a vacuum cleaner Download PDF

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Publication number
EP0396803B1
EP0396803B1 EP19890108516 EP89108516A EP0396803B1 EP 0396803 B1 EP0396803 B1 EP 0396803B1 EP 19890108516 EP19890108516 EP 19890108516 EP 89108516 A EP89108516 A EP 89108516A EP 0396803 B1 EP0396803 B1 EP 0396803B1
Authority
EP
European Patent Office
Prior art keywords
filter
container
filter device
vacuum cleaner
inlet opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19890108516
Other languages
German (de)
French (fr)
Other versions
EP0396803A1 (en
Inventor
Wolfgang Dipl.-Ing.(Fh) Fleischer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP19890108516 priority Critical patent/EP0396803B1/en
Priority to DE8989108516T priority patent/DE58902210D1/en
Publication of EP0396803A1 publication Critical patent/EP0396803A1/en
Application granted granted Critical
Publication of EP0396803B1 publication Critical patent/EP0396803B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation

Definitions

  • the invention relates to a filter arrangement according to the preamble of claim 1.
  • Such a filter device is known from DE-A-31 50 299.
  • the walls of the container are designed as a first filter. Behind the rear wall of the container, which is perpendicular with respect to the direction of the suction air flow, a second filter is fixedly arranged on the container.
  • the design of the container walls as a filter has the disadvantage that these walls have to be freed of adhering dirt parts mechanically with each emptying process. In addition, these walls must be designed as coarse filters, otherwise they will become completely impermeable over time.
  • Another disadvantage is that the downstream second filter, which is a fine filter, can only be shaken off to maintain the filter effect. A gradual clogging of this filter cannot be prevented in the long run by such a shaking, since dirt can only be removed by shaking on the surface of the second filter. This leads to a reduction in the suction power of the vacuum cleaner.
  • the invention has for its object to design a filter device of the generic type so that overall a better filter effect is achieved and the strength of the suction power of the vacuum cleaner is maintained.
  • the filter bag is replaced after a corresponding filling level has been reached and replaced with a new filter bag.
  • the filter bag can thus already be designed as a fine filter, so that an improved filter effect is achieved with a downstream filter, which can advantageously be a fine filter or an activated carbon filter. Since this second filter is interchangeable, there is no risk of reduced suction power if the filter is added.
  • a plate-shaped design of the second filter enables it to be easily attached in a guide provided on the container.
  • Such a plate-shaped filter can easily be carried out in multiple layers, so that special filters for different applications can be created by combining different filter layers.
  • the second filter is arranged on the side of the container adjacent to the inlet opening, it can lie tightly against a sealing element surrounding the inlet opening and thus take over the tight coupling of the filter device to the blower unit.
  • the different filter effect exists at least on the air outlet side of the second filter that is visible when the container is removed.
  • the different filter effect can be achieved in that the second filter in the partial area is impermeable or provided with an impregnating agent.
  • no dirt is deposited in the partial area, so that the filter surface in this area does not become discolored due to the dirt and thus stands out from the soiled area in the remaining area.
  • the impregnating agent causes a greater build-up of dirt, so that color differences between the two areas are also evident.
  • the partial area can be designed as a word symbol, for example “stop” or “change”.
  • the intermediate wall 3 has an inlet opening 6, to which the blower unit 4 is connected with its suction opening.
  • a carrying container 7 is inserted as a container, in which a filter bag 9 coupled to the connecting piece 8 of the vacuum cleaner is inserted as the first filter.
  • the carrying container 7 is designed with permeable lattice walls 10.
  • a nonwoven material can additionally be attached to the grid walls 10.
  • a U-guide 12 for a second filter 13 is formed on the lower container edge 11 on the rear side of the carrying container 7 adjacent to the inlet opening 6. That with one side 14 in the U-guide 12 inserted second filter 13 rests with its other side 15 on a molded on the upper container edge 16 support bar 17. Since the second filter 13 is thereby adequately supported, it can be pressed against a sealing element 18 which completely surrounds the inlet opening 6, so that a tight coupling of the filter device to the blower unit 4 is achieved.
  • the plate-shaped design of the second filter 13 enables a multilayer structure of this filter.
  • different special filters e.g. Allergy filters, microfilters, antibacterial filters, electrostatic filters
  • the second filter 13 can be designed for very special applications.
  • the second filter 13 is replaced when a certain degree of contamination is reached.
  • the second filter 13 has a different filter effect in a partial area 19 than in the remaining area 20. This results in a different degree of dirt deposition in the two areas 19 and 20, so that these areas stand out from one another in color when the second filter 13 becomes increasingly dirty. The user can easily recognize such a color difference and then replace the dirty filter 13 with a new one.
  • the sub-area 19 can, as shown in FIG 2, as a word symbol, e.g. "Stop”, be trained. The user thus knows that a filter change is necessary if he can clearly recognize this word.
  • a word symbol e.g. "Stop”

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Description

Die Erfindung betrifft eine Filteranordnung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a filter arrangement according to the preamble of claim 1.

Eine solche Filtereinrichtung ist durch die DE-A-31 50 299 bekannt. Bei dieser Filtereinrichtung sind die Wände des Behältnisses als erstes Filter ausgebildet. Hinter der mit bezug auf die Richtung des Saugluftstromes senkrechten Rückwand des Behältnisses ist ein zweites Filter fest an dem Behältnis angeordnet. Die Ausbildung der Behältniswände als Filter hat den Nachteil, daß diese Wände bei jedem Entleerungsvorgang mechanisch von anhaftenden Schmutzteilen befreit werden müssen. Außerdem müssen diese Wände als Grobfilter ausgebildet sein, da sie sonst im Laufe der Zeit vollkommen undurchlässig werden. Nachteilig ist ferner, daß auch das nachgeschaltete zweite Filter, welches ein Feinfilter ist, zur Erhaltung der Filterwirkung nur abgeschüttelt werden kann. Ein allmähliches Zusetzen dieses Filters läßt sich durch ein derartiges Abschütteln auf Dauer nicht verhindern, da durch das Schütteln nur an der Oberfläche des zweiten Filters abgelagerter Schmutz entfernbar ist. Dies führt zu einer Reduzierung der Saugleistung des Staubsaugers.Such a filter device is known from DE-A-31 50 299. In this filter device, the walls of the container are designed as a first filter. Behind the rear wall of the container, which is perpendicular with respect to the direction of the suction air flow, a second filter is fixedly arranged on the container. The design of the container walls as a filter has the disadvantage that these walls have to be freed of adhering dirt parts mechanically with each emptying process. In addition, these walls must be designed as coarse filters, otherwise they will become completely impermeable over time. Another disadvantage is that the downstream second filter, which is a fine filter, can only be shaken off to maintain the filter effect. A gradual clogging of this filter cannot be prevented in the long run by such a shaking, since dirt can only be removed by shaking on the surface of the second filter. This leads to a reduction in the suction power of the vacuum cleaner.

Der Erfindung liegt die Aufgabe zugrunde, eine Filtereinrichtung der gattungsgemäßen Art so auszubilden, daß insgesamt eine bessere Filterwirkung erreicht und die Stärke der Saugleistung des Staubsaugers erhalten bleibt.The invention has for its object to design a filter device of the generic type so that overall a better filter effect is achieved and the strength of the suction power of the vacuum cleaner is maintained.

Die Lösung der gestellten Aufgabe gelingt durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale.The problem is solved by the features specified in the characterizing part of claim 1.

Der Filterbeutel wird nach Erreichen eines entsprechenden Füllungsgrades ausgetauscht und durch einen neuen Filterbeutel ersetzt. Damit kann der Filterbeutel bereits als Feinfilter ausgebildet sein, so daß mit einem nachgeschalteten Filter, welches vorteilhafterweise ein Feinstfilter oder ein Aktivkohlefilter sein kann, eine verbesserte Filterwirkung erreicht wird. Da dieses zweite Filter austauschbar ist, besteht nicht die Gefahr einer Saugleistungsminderung bei zugesetztem Filter.The filter bag is replaced after a corresponding filling level has been reached and replaced with a new filter bag. The filter bag can thus already be designed as a fine filter, so that an improved filter effect is achieved with a downstream filter, which can advantageously be a fine filter or an activated carbon filter. Since this second filter is interchangeable, there is no risk of reduced suction power if the filter is added.

Eine plattenförmige Ausbildung des zweiten Filters ermöglicht eine einfache Befestigung desselben in einer am Behältnis vorgesehenen Führung. Ein solches plattenförmiges Filter läßt sich leicht mehrschichtig ausführen, so daß durch Kombination verschiedener Filterschichten Spezialfilter für unterschiedliche Anwendungsfälle geschaffen werden können.A plate-shaped design of the second filter enables it to be easily attached in a guide provided on the container. Such a plate-shaped filter can easily be carried out in multiple layers, so that special filters for different applications can be created by combining different filter layers.

Wird das zweite Filter auf der der Einlaßöffnung benachbarten Seite des Behältnisses angeordnet, so kann es dicht an einem die Einlaßöffnung umgebenden Dichtelement anliegen und damit die dichte Ankopplung der Filtereinrichtung an das Gebläseaggregat übernehmen.If the second filter is arranged on the side of the container adjacent to the inlet opening, it can lie tightly against a sealing element surrounding the inlet opening and thus take over the tight coupling of the filter device to the blower unit.

Durch eine in einem Teilbereich gegenüber dem Restbereich unterschiedliche Filterwirkung wird an dem zweiten Filter eine Anzeigemöglichkeit für einen notwendigen Austausch dieses Filters erreicht. Wegen der unterschiedlichen Filterwirkung der beiden Bereiche ergeben sich bei einer zunehmenden Verschmutzung des zweiten Filters farbliche Unterschiede zwischen den beiden Bereichen, die dem Benutzer eines Staubsauges einen notwendigen Wechsel dieses Filters signalisieren.As a result of a filter effect that differs in one sub-area from the rest of the area, a display option for a necessary replacement of this filter is achieved on the second filter. Because of the different filter effect of the two areas, there is a color difference between the two areas when the second filter becomes soiled, which signals to the user of a vacuum cleaner that this filter needs to be changed.

Dabei reicht es aus, wenn die unterschiedliche Filterwirkung zumindest an der bei herausgenommenem Behältnis sichtbaren Luftaustrittsseite des zweiten Filters besteht. Die unterschiedliche Filterwirkung kann dadurch erreicht werden, daß das zweite Filter in dem Teilbereich undurchlässig oder mit einem Tränkmittel versehen ist. Im einen Fall lagert sich in dem Teilbereich kein Schmutz ab, so daß sich die Filteroberfläche in diesem Bereich nicht durch den Schmutz verfärbt und somit von der verschmutzten Fläche im Restbereich abhebt. Im anderen Falle erfolgt durch das Tränkmittel eine stärkere Schmutzablagerung, so daß ebenfalls farbliche Unterschiede zwischen den beiden Bereichen zutage treten. Der Teilbereich kann als Wortsymbol beispielsweise "Stop" oder "Wechsel" ausgebildet sein.It is sufficient if the different filter effect exists at least on the air outlet side of the second filter that is visible when the container is removed. The different filter effect can be achieved in that the second filter in the partial area is impermeable or provided with an impregnating agent. In one case, no dirt is deposited in the partial area, so that the filter surface in this area does not become discolored due to the dirt and thus stands out from the soiled area in the remaining area. In the other case, the impregnating agent causes a greater build-up of dirt, so that color differences between the two areas are also evident. The partial area can be designed as a word symbol, for example “stop” or “change”.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird der Anmeldungsgegenstand nachfolgend näher beschrieben. Es zeigt:

  • FIG 1 eine in einem Staubsauger angeordnete Filtereinrichtung im Schnitt,
  • FIG 2 ein zweites Filter in Draufsicht.
The subject of the application is described in more detail below using an exemplary embodiment shown in the drawing. It shows:
  • 1 is a sectional view of a filter device arranged in a vacuum cleaner,
  • 2 shows a second filter in plan view.

Mit 1 ist das Gehäuse eines Staubsaugers bezeichnet, in dem ein Staubraum 2 und ein von diesem durch eine Zwischenwand 3 getrennter, das Gebläseaggregat 4 enthaltender Gebläseraum 5 vorgesehen ist. Die Zwischenwand 3 weist eine Einlaßöffnung 6 auf, an die das Gebläseaggregat 4 mit seiner Ansaugöffnung angeschlossen ist.1 designates the housing of a vacuum cleaner, in which a dust chamber 2 and a fan chamber 5, which is separated from the latter by an intermediate wall 3 and contains the blower unit 4, is provided. The intermediate wall 3 has an inlet opening 6, to which the blower unit 4 is connected with its suction opening.

In den Staubraum 2 ist als Behältnis ein Tragcontainer 7 eingesetzt, in dem ein an den Anschlußstutzen 8 des Staubsaugers angekoppelter Filterbeutel 9 als erstes Filter eingelegt ist. Der Tragcontainer 7 ist mit durchlässigen Gitterwänden 10 ausgeführt. An den Gitterwänden 10 kann zusätzlich ein Vließmaterial angebracht sein. Auf der der Einlaßöffnung 6 benachbarten Rückseite des Tragcontainers 7 ist an der unteren Containerkante 11 eine U-Führung 12 für ein zweites Filter 13 angeformt. Das mit seiner einen Seite 14 in die U-Führung 12 eingesteckte zweite Filter 13 liegt mit seiner anderen Seite 15 an einer an der oberen Containerkante 16 angeformten Stützleiste 17 an. Da das zweite Filter 13 hierdurch ausreichend abgestützt ist, kann es gegen ein die Einlaßöffnung 6 vollständig umschließendes Dichtelement 18 gedrückt werden, so daß eine dichte Ankopplung der Filtereinrichtung an das Gebläseaggregat 4 erreicht ist.In the dust chamber 2, a carrying container 7 is inserted as a container, in which a filter bag 9 coupled to the connecting piece 8 of the vacuum cleaner is inserted as the first filter. The carrying container 7 is designed with permeable lattice walls 10. A nonwoven material can additionally be attached to the grid walls 10. A U-guide 12 for a second filter 13 is formed on the lower container edge 11 on the rear side of the carrying container 7 adjacent to the inlet opening 6. That with one side 14 in the U-guide 12 inserted second filter 13 rests with its other side 15 on a molded on the upper container edge 16 support bar 17. Since the second filter 13 is thereby adequately supported, it can be pressed against a sealing element 18 which completely surrounds the inlet opening 6, so that a tight coupling of the filter device to the blower unit 4 is achieved.

Die plattenförmige Ausbildung des zweiten Filters 13 ermöglicht einen mehrschichtigen Aufbau dieses Filters. Durch Kombination unterschiedlicher Sonderfilter, z.B. Allergiefilter, Mikrofilter, Antibakterienfilter, elektrostatische Filter kann das zweite Filter 13 für ganz spezielle Anwendungsfälle ausgebildet werden.The plate-shaped design of the second filter 13 enables a multilayer structure of this filter. By combining different special filters, e.g. Allergy filters, microfilters, antibacterial filters, electrostatic filters, the second filter 13 can be designed for very special applications.

Zur Erhaltung der vollen Saugleistung des Staubsaugers ist es notwendig, daß außer dem Filterbeutel 9 auch das zweite Filter 13 bei Erreichen eines bestimmten Verschmutzungsgrades ausgewechselt wird. Um den Benutzer einen solchen notwendigen Wechsel zu signalisieren, weist das zweite Filter 13 in einem Teilbereich 19 eine andere Filterwirkung als im Restbereich 20 auf. Hierdurch ergibt sich ein unterschiedlicher Grad der Schmutzablagerung in den beiden Bereichen 19 und 20, so daß sich diese Bereiche bei zunehmender Verschmutzung des zweiten Filters 13 farblich voneinander abheben. Einen solchen farblichen Unterschied kann der Benutzer leicht erkennen und darauf hin das verschmutzte Filter 13 gegen ein neues auswechseln.To maintain the full suction power of the vacuum cleaner, it is necessary that, in addition to the filter bag 9, the second filter 13 is replaced when a certain degree of contamination is reached. In order to signal such a necessary change to the user, the second filter 13 has a different filter effect in a partial area 19 than in the remaining area 20. This results in a different degree of dirt deposition in the two areas 19 and 20, so that these areas stand out from one another in color when the second filter 13 becomes increasingly dirty. The user can easily recognize such a color difference and then replace the dirty filter 13 with a new one.

Der Teilbereich 19 kann, wie dies die FIG 2 zeigt, als Wortsymbol, z.B. "Stop", ausgebildet sein. Damit weiß der Benutzer, daß ein Filterwechsel notwendig ist, wenn er dieses Wort deutlich erkennen kann.The sub-area 19 can, as shown in FIG 2, as a word symbol, e.g. "Stop", be trained. The user thus knows that a filter change is necessary if he can clearly recognize this word.

Claims (7)

1. Filter device for a vacuum cleaner, which consists of a container (7), arranged in a removable manner in the dust chamber (2) of the vacuum cleaner, in which container dirt is collected which has been filtered out from the dirt-laden vacuum stream by means of a first filter (9), and of a second filter (13) arranged on the container (7) and connected after the first filter (9), and which filter device can be attached tightly to the intake connecting piece (8) of the vacuum cleaner and to an inlet opening (6) leading to the fan unit (4) of the vacuum cleaner, characterized in that the first filter consists of a filter bag (9) inserted in a replaceable manner into the container (7) and the second filter (13) is arranged in a replaceable manner on the container (7).
2. Filter device according to claim 1, characterized in that the second filter (13) is constructed in the form of a plate and is held so that it is inserted in a guide (12) provided on the container (7).
3. Filter device according to claim 1 or 2, characterized in that the second filter is arranged on the side of the container (7) which is adjacent to the inlet opening (6) and rests tightly against a sealing element (18) surrounding the inlet opening (6).
4. Filter device according to claim 1, 2 or 3, characterized in that the second filter (13) has in a partial region (19) a filter action which is different compared with the remaining region (20).
5. Filter device according to claim 4, characterized in that the different filter actions of the regions (19,20) are at least on the air-outlet side of the second filter (13).
6. Filter device according to claim 4 or 5, characterized in that the second filter (13) is impermeable in the partial region (19).
7, Filter device according to claim 4 or 5, characterized in that the second filter (13) is provided with an impregnating means in the partial region (19).
EP19890108516 1989-05-11 1989-05-11 Filter device for a vacuum cleaner Expired - Lifetime EP0396803B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19890108516 EP0396803B1 (en) 1989-05-11 1989-05-11 Filter device for a vacuum cleaner
DE8989108516T DE58902210D1 (en) 1989-05-11 1989-05-11 FILTER DEVICE FOR A VACUUM CLEANER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890108516 EP0396803B1 (en) 1989-05-11 1989-05-11 Filter device for a vacuum cleaner

Publications (2)

Publication Number Publication Date
EP0396803A1 EP0396803A1 (en) 1990-11-14
EP0396803B1 true EP0396803B1 (en) 1992-09-02

Family

ID=8201346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890108516 Expired - Lifetime EP0396803B1 (en) 1989-05-11 1989-05-11 Filter device for a vacuum cleaner

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EP (1) EP0396803B1 (en)
DE (1) DE58902210D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204553A1 (en) * 1992-02-15 1993-08-19 Miele & Cie Vacuum cleaner with separately replaceable fine filter - has additional odour removing or masking filter
DE9209783U1 (en) * 1992-07-21 1993-11-25 Siemens AG, 80333 München Additional filter interchangeably arranged in a vacuum cleaner
DE59605217D1 (en) * 1995-03-27 2000-06-21 Bsh Bosch Siemens Hausgeraete Filter device for a vacuum cleaner
DE19801762B4 (en) * 1998-01-19 2012-02-23 BSH Bosch und Siemens Hausgeräte GmbH vacuum cleaner
DE19935355A1 (en) * 1999-01-07 2000-07-13 Vorwerk Co Interholding Dust filter bag for a vacuum cleaner
ITPD20010029A1 (en) * 2001-02-07 2002-08-07 T P A Impex Spa FILTER GROUP STRUCTURE FOR HOUSEHOLD AND / OR INDUSTRIAL CLEANING MACHINES, TYPE OF VACUUM CLEANERS, ELECTRIC PURPOSES OR FOR DEPU MACHINES
DE10229796A1 (en) * 2002-07-03 2004-01-15 Vorwerk & Co. Interholding Gmbh Filters for a vacuum cleaner and vacuum cleaners with a pre-filter and a blow-out filter
DE102006019953B4 (en) * 2006-04-28 2008-04-24 BSH Bosch und Siemens Hausgeräte GmbH Vacuum cleaner with exhaust filter change indicator
DE102010016788B4 (en) 2010-05-05 2012-01-19 Miele & Cie. Kg Filter, vacuum cleaner with such a filter and use of such a filter as a vacuum cleaner exhaust filter
CN102525343A (en) * 2010-12-16 2012-07-04 莱克电气股份有限公司 Dust bag type dust collector
GB2605571B (en) * 2021-03-30 2023-08-23 Dyson Technology Ltd A serviceable part for an electrical appliance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1829582A (en) * 1928-12-31 1931-10-27 Electric Vacuum Cleaner Co Vacuum cleaner
US3636681A (en) * 1970-03-20 1972-01-25 Singer Co Vacuum cleaner filter assembly
US4426211A (en) * 1980-12-19 1984-01-17 Sharp Kabushiki Kaisha Vacuum cleaner with dust disposal
DE3403105A1 (en) * 1984-01-30 1985-08-01 Siemens Ag Filter arrangement in a vacuum cleaner
DE8420758U1 (en) * 1984-07-11 1985-11-07 Siemens AG, 1000 Berlin und 8000 München Filter for a vacuum cleaner
US4699641A (en) * 1986-09-29 1987-10-13 The Singer Company Support tray for disposable filter bag

Also Published As

Publication number Publication date
EP0396803A1 (en) 1990-11-14
DE58902210D1 (en) 1992-10-08

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