EP0530498B1 - Flap valve - Google Patents

Flap valve Download PDF

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Publication number
EP0530498B1
EP0530498B1 EP92112979A EP92112979A EP0530498B1 EP 0530498 B1 EP0530498 B1 EP 0530498B1 EP 92112979 A EP92112979 A EP 92112979A EP 92112979 A EP92112979 A EP 92112979A EP 0530498 B1 EP0530498 B1 EP 0530498B1
Authority
EP
European Patent Office
Prior art keywords
check valve
ribs
flap valve
film hinge
vacuum cleaners
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
EP92112979A
Other languages
German (de)
French (fr)
Other versions
EP0530498A1 (en
Inventor
Wieland Gühne
Heinz-Jürgen Ahlf
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.)
Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
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 Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Publication of EP0530498A1 publication Critical patent/EP0530498A1/en
Application granted granted Critical
Publication of EP0530498B1 publication Critical patent/EP0530498B1/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
    • A47L9/14—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
    • A47L9/1436—Connecting plates, e.g. collars, end closures
    • A47L9/1445—Connecting plates, e.g. collars, end closures with closure means
    • A47L9/1454—Self-sealing closures, e.g. valves
    • 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

Definitions

  • the invention relates to a non-return valve made of elastic material, such as rubber or the like, for upright connecting pieces for receiving filter bag base plates of vacuum cleaners, in particular handheld vacuum cleaners.
  • the non-return valve is attached to the filter socket between this and a filter bag and has a film hinge.
  • check valves are made of elastic rubber parts that have a circumferential bead that ensures sufficient resistance to kinking.
  • the object of the invention is to ensure that a check valve does not hinder the working air flow of the vacuum cleaner, but closes the filter socket tightly when the device is at a standstill.
  • the advantages of the inventive solution are that there is enough kink resistance to prevent dirt from the filter bag from getting into the filter socket. At the same time, the check valve only minimally impedes the air flow due to its high buckling capacity.
  • the non-return flap (2) lies sealingly on the edge (3) of the filter socket (1). This is ensured - even if the vacuum cleaner changes its position - by the upstanding ribs (8) on the film hinge (6) at the point of the bending cross section (7-7) by causing a high closing force (10) of the check valve (2).
  • the ribs (8) on the hinge (6) deflect laterally (9) after sufficient force is exerted by the air flow (4) and the flap 2 opens (5).
  • the closing force (13) is no longer from the ribs (9) influenced.
  • a look at the closing force-displacement line initially shows - i.e. when the device is at a standstill - the relatively large closing force required for the closing function (10).
  • the air flow (4) presses against the non-return flap (2) and the closing force increases briefly (11) because the ribs (8) resist the air flow (4). If this is overcome by the air flow (4) and the ribs (8) move sideways (9), the closing force (12) drops and the flap (2) opens (5).
  • the closing force shows the same progression (13) as that (14) of a flap that has the same closing force (10) when the device is at a standstill, but always constant when the vacuum cleaner is in operation .

Abstract

The invention relates to a flap valve made of elastic material, such as rubber or the like, for the upright nozzle for receiving baseplates of dust bags of vacuum cleaners, in particular hand-held vacuum cleaners, the flap valve being attached to the dust bag nozzle between the latter and a dust bag and having a film hinge. It is proposed that at least three ribs (8) having a height of at least 2 mm and a width of 0.2 to 0.8 mm are mounted on the dust bag side of the flap valve (2). <IMAGE>

Description

Die Erfindung betrifft eine Rückschlagklappe aus elastischem Material, wie Gummi oder ähnlichem, für aufrechtstehende Stutzen zur Aufnahme von Filterbeutelgrundplatten von Staubsaugern, insbesondere Handstaubsaugern. Die Rückschlagklappe ist am Filterstutzen zwischen diesem und einem Filterbeutel befestigt und weist ein Filmscharnier auf.The invention relates to a non-return valve made of elastic material, such as rubber or the like, for upright connecting pieces for receiving filter bag base plates of vacuum cleaners, in particular handheld vacuum cleaners. The non-return valve is attached to the filter socket between this and a filter bag and has a film hinge.

Wie aus dem Gebrauchsmuster G 81 32 813.3 bekannt, bestehen Rückschlagklappen aus elastischen Gummiteilen, die über eine umlaufende Wulst verfügen, die genügend Knickfestigkeit sicherstellt.
Es existieren außerdem Lösungen mit Schlitzen im Bereich des Biegequerschnitts der Klappen, um eine gute Knickfähigkeit zu gewährleisten.As known from utility model G 81 32 813.3, check valves are made of elastic rubber parts that have a circumferential bead that ensures sufficient resistance to kinking.
There are also solutions with slots in the area of the bending cross section of the flaps in order to ensure good bending ability.

Der Nachteil dieser Lösungen liegt darin, daß entweder eine gute Knickfähigkeit oder eine gute Knickfestigkeit erreicht wird; das heißt, eine der beiden Zielsetzungen wird immer nur mangelhaft erreicht.
Das hat zur Folge, daß die Rückschlagklappe entweder zu hohe Verluste im Luftstrom des Staubsaugers verursacht, oder daß sie, insbesondere bei eventuellen Lageveränderungen des Staubsaugers, den Stutzen nicht dichtend verschließt, so daß bei ausgeschaltetem Gerät Schmutz in das Gebläse gelangen kann.The disadvantage of these solutions is that either good kinking ability or good kink resistance is achieved; that is, one of the two objectives is always poorly achieved.
The result of this is that the non-return valve either causes excessive losses in the air flow of the vacuum cleaner, or that it does not seal the nozzle, in particular if the vacuum cleaner changes position, so that dirt can get into the fan when the device is switched off.

Aufgabe der Erfindung ist es, sicherzustellen, daß eine Rückschlagklappe den Arbeitsluftstrom des Staubsaugers nicht behindert, jedoch bei Gerätestillstand den Filterstutzen dicht verschließt.The object of the invention is to ensure that a check valve does not hinder the working air flow of the vacuum cleaner, but closes the filter socket tightly when the device is at a standstill.

Gelöst ist diese Aufgabe durch die in Anspruch 1 dargelegte Erfindung.
Die Unteransprüche 2 und 3 stellen vorteilhafte Ausgestaltungen der Erfindung dar.This object is achieved by the invention set out in claim 1.
The sub-claims 2 and 3 represent advantageous embodiments of the invention.

Die Vorteile der erfinderischen Lösung liegen darin, daß genügend Knickfestigkeit vorhanden ist, um zu verhindern, daß Schmutz aus dem Filterbeutel in den Filterstutzen gelangen kann. Gleichzeitig behindert die Rückschlagklappe wegen ihrer hohen Knickfähigkeit nur minimal den Luftstrom.The advantages of the inventive solution are that there is enough kink resistance to prevent dirt from the filter bag from getting into the filter socket. At the same time, the check valve only minimally impedes the air flow due to its high buckling capacity.

Der Gegenstand der Erfindung ist nachstehend anhand eines zeichnerisch veranschaulichten Ausführungsbeispiels näher erläutert.The subject matter of the invention is explained in more detail below with the aid of an exemplary embodiment illustrated in the drawing.

Es zeigt:

Fig. 1:
Den Filterstutzen mit der Rückschlagklappe in Seitenansicht,
Fig. 2:
die Rückschlagklappe in Draufsicht in geschlossenem Zustand,
Fig. 3:
eine der Fig. 2 entsprechende Darstellung in geöffnetem Zustand,
Fig. 4:
das Schließkraft-Weg-Diagramm der Rückschlagklappe.
It shows:
Fig. 1:
The filter socket with the check valve in side view,
Fig. 2:
the check valve in a top view in the closed state,
Fig. 3:
1 corresponding representation in the open state,
Fig. 4:
the closing force-displacement diagram of the check valve.

Bei Stillstand des Staubsaugers liegt die Rückschlagklappe (2) dichtend auf dem Rand (3) des Filterstutzens (1) auf.
Dies gewährleisten - auch bei Lageveränderungen des Staubsaugers - die aufrechtstehenden Rippen (8) am Filmscharnier (6) an der Stelle des Biegequerschnitts (7-7 ), indem sie eine hohe Schließkraft (10) der Rückschlagklappe (2) bewirken.
Bei Betrieb des Staubsaugers weichen die Rippen (8), nachdem ihnen genügend Kraft durch den Luftstrom (4) entgegengebracht wird, am Scharnier (6) seitlich aus (9) und die Klappe 2 öffnet sich (5).
Die Schließkraft (13) wird jetzt nicht mehr von den Rippen (9) beeinflußt.When the vacuum cleaner is at a standstill, the non-return flap (2) lies sealingly on the edge (3) of the filter socket (1).
This is ensured - even if the vacuum cleaner changes its position - by the upstanding ribs (8) on the film hinge (6) at the point of the bending cross section (7-7) by causing a high closing force (10) of the check valve (2).
When the vacuum cleaner is in operation, the ribs (8) on the hinge (6) deflect laterally (9) after sufficient force is exerted by the air flow (4) and the flap 2 opens (5).
The closing force (13) is no longer from the ribs (9) influenced.

Eine Betrachtung der Schließkraft-Weg-Linie zeigt zu Anfang - das heißt, bei Gerätestillstand - die für die Schließfunktion nötige, relativ große Schließkraft (10).
Beim anschließenden Anschalten des Staubsaugers drückt der Luftstrom (4) gegen die Rückschlagklappe (2) und die Schließkraft steigt kurzzeitig an (11), weil die Rippen (8) dem Luftstrom (4) einen Widerstand entgegensetzen.
Ist dieser vom Luftstrom (4) überwunden und die Rippen (8) weichen seitlich aus (9), sinkt die Schließkraft (12) und die Klappe (2) öffnet sich (5). Danach - das heißt bei Weiterbetrieb des Staubsaugers - zeigt die Schließkraft (mit geringeren Absolutwerten) den gleichen Verlauf (13) wie der (14) einer Klappe, die bei Gerätestillstand die gleiche, jedoch auch bei Betrieb des Staubsaugers immer gleichbleibende Schließkraft (10) hat.A look at the closing force-displacement line initially shows - i.e. when the device is at a standstill - the relatively large closing force required for the closing function (10).
When the vacuum cleaner is then switched on, the air flow (4) presses against the non-return flap (2) and the closing force increases briefly (11) because the ribs (8) resist the air flow (4).
If this is overcome by the air flow (4) and the ribs (8) move sideways (9), the closing force (12) drops and the flap (2) opens (5). Then - i.e. when the vacuum cleaner continues to operate - the closing force (with lower absolute values) shows the same progression (13) as that (14) of a flap that has the same closing force (10) when the device is at a standstill, but always constant when the vacuum cleaner is in operation .

Claims (3)

  1. A check valve (2) of flexible material such as rubber or the like, for vertical nozzles (1) adapted to receive filter bag base plates of vacuum cleaners, especially hand vacuum cleaners, the check valve (2) being fastened to the filter nozzle (1) between the latter and a filter bag and having a film hinge (6), characterized in that the check valve (2) at its filter bag end exhibits ribs (8) at least 2 mm high and 0.2 through 0.8 mm wide, which extend transversally through the film hinge (6).
  2. A check valve according to claim 1, characterized in that the ribs (8) are of a flexible material such as rubber or the like.
  3. A check valve according to claims 1 and 2, characterized in that the ribs (8) extend vertically in relation to the film hinge (6).
EP92112979A 1991-08-31 1992-08-01 Flap valve Expired - Lifetime EP0530498B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9110827U DE9110827U1 (en) 1991-08-31 1991-08-31
DE9110827U 1991-08-31

Publications (2)

Publication Number Publication Date
EP0530498A1 EP0530498A1 (en) 1993-03-10
EP0530498B1 true EP0530498B1 (en) 1995-06-14

Family

ID=6870816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112979A Expired - Lifetime EP0530498B1 (en) 1991-08-31 1992-08-01 Flap valve

Country Status (6)

Country Link
EP (1) EP0530498B1 (en)
AT (1) ATE123638T1 (en)
DE (2) DE9110827U1 (en)
DK (1) DK0530498T3 (en)
ES (1) ES2074774T3 (en)
GR (1) GR3017294T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110827U1 (en) * 1991-08-31 1991-11-14 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal, De

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626418A (en) * 1948-09-10 1953-01-27 Kingston Products Corp Nozzle casing for broom-type vacuum cleaners
DE1628707B2 (en) * 1967-09-06 1972-02-24 Licentia Patent-Verwaltungs Gmbh, 6000 Frankfurt ARRANGEMENT OF A RETURN FLAP FOR THE INLET FITTING OF A VACUUM CLEANER FILTER BAG
DE8132813U1 (en) * 1981-11-10 1982-07-29 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal CHECK VALVE FOR FILTER CONNECTOR
DE9110827U1 (en) * 1991-08-31 1991-11-14 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal, De

Also Published As

Publication number Publication date
EP0530498A1 (en) 1993-03-10
DK0530498T3 (en) 1995-10-16
ATE123638T1 (en) 1995-06-15
GR3017294T3 (en) 1995-12-31
DE9110827U1 (en) 1991-11-14
ES2074774T3 (en) 1995-09-16
DE59202513D1 (en) 1995-07-20

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