EP0432455B1 - Wet-dry vacuum cleaner - Google Patents
Wet-dry vacuum cleaner Download PDFInfo
- Publication number
- EP0432455B1 EP0432455B1 EP19900121353 EP90121353A EP0432455B1 EP 0432455 B1 EP0432455 B1 EP 0432455B1 EP 19900121353 EP19900121353 EP 19900121353 EP 90121353 A EP90121353 A EP 90121353A EP 0432455 B1 EP0432455 B1 EP 0432455B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- suction
- suction line
- vacuum cleaner
- wet
- 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
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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
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0023—Recovery tanks
- A47L7/0038—Recovery tanks with means for emptying the tanks
-
- 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
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0042—Gaskets; Sealing means
Definitions
- the invention relates to a wet and dry vacuum cleaner with a collecting container for contaminated liquid, a suction unit for generating a suction pressure in the collecting container and with a suction line leading from a suction nozzle to the collecting container.
- the wet and dry vacuum cleaners of this type are suitable for absorbing both contaminated liquid and dry dust.
- the conversions on the device itself are annoying for the operator, and these conversions are often omitted, so that, with appropriate operation, performance reductions and even destruction, for example of a paper filter bag by liquid, can result.
- a wet and dry vacuum cleaner of the type described at the outset in that a chamber is arranged for dry vacuuming in which the suction line opens on the suction nozzle side and from which the suction line emerges again on the collecting container side, and in that an air-permeable one in the chamber and a dustproof filter bag is arranged, into which the suction line opens on the suction nozzle side.
- the cross section of the suction line is covered with a microfilter when the suction line exits the chamber. This ensures that no dust-like particles are sucked out of the chamber through the suction line, so that the suction unit is absolutely protected from dust particles.
- the chamber can have an airtight sealable cover, which in the open state enables access to the interior of the chamber. Since the filter bag is usually held detachably at the end of the suction line, the filter bag can be removed when it is filled and replaced with an empty filter bag.
- suction line is designed as a rigid tube in the region adjoining the chamber on both sides.
- the suction line can have a detachable connection in the area between the chamber and the collecting container, which connection is preferably arranged in the tubular part of the suction line between the chamber and a handle for displacing the structural unit consisting of suction nozzle, tubular suction line and chamber.
- This assembly guided by the operator over the surface to be cleaned can thus be removed in a simple manner by loosening this connection and replaced by another assembly, so that the transition from the wet suction function to the dry suction function can be accomplished by this single action.
- the wet and dry vacuum cleaner comprises, in a manner known per se, a dirt container which is sealed off from the outside and connected to a suction unit, by means of which a suction pressure is built up in the collecting container.
- a suction line opens into the collecting container, which is connected to the attachment shown in the drawing.
- This front attachment comprises a tubular suction line 1, which connects a floor suction nozzle 2 with a suction hose, not shown in the drawing, which leads to the collecting container.
- the tubular suction line has at its upper end a bend 3 to which the suction hose can be connected.
- a handle 4 at the upper end of the tubular suction line 1, so that the suction nozzle 2 can be guided by means of this handle 4 over the tubular suction line 1 over the surface to be cleaned.
- a chamber 5 which extends over a considerable part of this tubular suction line 1, is switched into the tubular suction line 1. It is an essentially cuboid chamber which is sealed airtight by means of a cover 6 which extends over its entire length. The lid is removable and can be closed in its closed position by means of latch 7 known per se (FIG. 2).
- the tubular suction line 1 enters the interior of the chamber 5 on the suction nozzle side in the form of a pipe socket 8, at the opposite end of the chamber 5 the suction line 1 also forms a pipe socket 9 which protrudes slightly into the chamber 5.
- a filter bag 10 for example a conventional paper filter bag, which is pushed onto the pipe socket 8 in a sealed manner, is arranged in the interior of the chamber 5 in between.
- the cross section of the pipe socket 9 is covered by a plate-shaped microfilter 11 which extends over the entire cross section of the chamber 5 and is detachably fastened in the chamber 5 in a suitable holder (not shown in the drawing).
- another attachment can be used, for example a continuous suction line, not shown in the drawing, which is connected to a suction nozzle for wet operation.
- the attachment shown in the drawing is used for dry vacuum operation.
- a negative pressure is generated in the interior of the chamber 5 via the suction line 1, so that air is drawn in from the surroundings via the suction nozzle 2, which air enters the filter bag 10 and passes through it.
- Any entrained dust particles are collected in the filter bag.
- Any fine dust passing through the filter bag is additionally retained in the microfilter 11, so that an air stream cleaned of dust particles of any size enters the collecting container-side section of the suction line 1.
- the filter bag 10 can be removed when it is filled, for this purpose the lid 6 is opened.
- suction nozzle 2 If the operator wants to switch to wet suction, it is sufficient to separate the component consisting of suction nozzle 2, suction line 1 and chamber 5 by loosening the connection 12 from the manifold-near suction line part and the handle, at this point a wet suction attachment can then be connected, which in the described manner only has a continuous suction pipe and a wet suction nozzle. Further conversions or conversions of the wet and dry vacuum cleaner are not necessary for the transition from dry vacuuming to wet vacuuming.
- the tubular suction line 1 extends obliquely from the suction nozzle 2 up to the handle 4, so that a rigid, easy-to-use unit is formed, which also includes the chamber 5 integrated into the suction pipe.
- the chamber with the filter bag is not very heavy, ie the handling of this unit is not seriously hampered by the arrangement of the chamber and the filter in the suction pipe. It is particularly advantageous that no heavy suction units or similar machine parts are necessary in the chamber, since the suction air flow is generated in the wet and dry vacuum cleaner, which can be arranged stationary or guided on rollers. Only the dry dust collector is located in the chamber.
Description
Die Erfindung betrifft einen Naß-Trockensauger mit einem Sammelbehälter für verschmutzte Flüssigkeit, einem Saugaggregat zur Erzeugung eines Saugdruckes in dem Sammelbehälter und mit einer von einer Saugdüse zu dem Sammelbehälter führenden Saugleitung.The invention relates to a wet and dry vacuum cleaner with a collecting container for contaminated liquid, a suction unit for generating a suction pressure in the collecting container and with a suction line leading from a suction nozzle to the collecting container.
Die Naß-Trockensauger dieser Bauart sind geeignet, sowohl verschmutzte Flüssigkeit aufzunehmen als trockenen Staub. Allerdings ist es üblicherweise nicht möglich, beide Betriebsarten gleichzeitig anzuwenden, es ist vielmehr bei den meisten Geräten notwendig, zum optimalen Trockenbetrieb und zum optimalen Naßbetrieb Umbauten an dem Gerät selbst vorzunehmen und das Zubehör auszutauschen. Insbesondere die Umbauten am Gerät selbst sind dabei für den Betreiber störend, und häufig werden diese Umbauten unterlassen, so daß sich dann bei einem entsprechenden Betrieb Leistungsminderungen und sogar Zerstörungen, beispielsweise eines Papierfilterbeutels durch Flüssigkeit, ergeben können. Es ist Aufgabe der Erfindung, einen gattungsgemäßen Naß-Trockensauger so auszubilden, daß mit ihm wahlweise naß- oder trockengesaugt werden kann, wobei zur Umstellung lediglich das Saugzubehör entsprechend gewählt werden muß, ohne daß am Gerät selbst irgendwelche Veränderungen vorgenommen werden müssen.The wet and dry vacuum cleaners of this type are suitable for absorbing both contaminated liquid and dry dust. However, it is usually not possible to use both operating modes at the same time. Rather, with most devices it is necessary to carry out conversions on the device itself and to replace the accessories for optimal dry operation and for optimal wet operation. In particular, the conversions on the device itself are annoying for the operator, and these conversions are often omitted, so that, with appropriate operation, performance reductions and even destruction, for example of a paper filter bag by liquid, can result. It is an object of the invention to design a generic wet and dry vacuum cleaner so that it can be used for either wet or dry vacuuming, with only the suction accessories corresponding to the changeover must be selected without making any changes to the device itself.
Diese Aufgabe wird bei einem Naß-Trockensauger der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß zum Trockensaugen in der Saugleitung eine Kammer angeordnet ist, in die sich die Saugleitung saugdüsenseitig öffnet und aus der die Saugleitung sammelbehälterseitig wieder austritt, und daß in der Kammer ein luftdurchlässiger und staubdichter Filterbeutel angeordnet ist, in den die Saugleitung saugdüsenseitig einmündet.This object is achieved according to the invention in a wet and dry vacuum cleaner of the type described at the outset in that a chamber is arranged for dry vacuuming in which the suction line opens on the suction nozzle side and from which the suction line emerges again on the collecting container side, and in that an air-permeable one in the chamber and a dustproof filter bag is arranged, into which the suction line opens on the suction nozzle side.
Es wird also vorgesehen, für das Trockensaugen einen speziellen Vorsatz zu verwenden, der ein in die Saugleitung eingeschaltetes Staubfangfilter enthält. Dies führt dazu, daß aufgenommener Trockenstaub in diesem Filterbeutel festgehalten wird, so daß der trockene Staub nicht in den Sammelbehälter und damit nicht in das eigentliche Sauggerät gelangt. Irgendwelche Fehlfunktionen des Sauggerätes sind daher ausgeschlossen. Zum Naßsaugen genügt es, eine entsprechende Naßsaugdüse anstelle der aus Saugdüse, Saugleitung und Filterbeutelkammer bestehenden Baueinheit mit der Saugleitung zu verbinden. Da für die Aufnahme von Flüssigkeiten und von trockenem Staub ohnehin unterschiedliche Bodensaugdüsen eingesetzt werden müssen, ist dieses Auswechseln eine übliche, nicht ins Gewicht fallende Tätigkeit, mit dieser Auswechslung der Bodendüse ergibt sich zwangsläufig die Umrüstung des Saugers auf Naß- bzw. Trockensaugung.It is therefore envisaged to use a special attachment for dry vacuuming, which contains a dust filter switched on in the suction line. This leads to the fact that absorbed dry dust is held in this filter bag so that the dry dust does not get into the collecting container and thus not into the actual suction device. Any malfunctions of the suction device are therefore excluded. For wet suction, it is sufficient to connect a corresponding wet suction nozzle to the suction line instead of the unit consisting of the suction nozzle, suction line and filter bag chamber. Since different floor suction nozzles have to be used for the absorption of liquids and dry dust anyway, this replacement is a normal, insignificant activity.With this floor nozzle replacement, the vacuum cleaner is inevitably converted to wet or dry suction.
Am Gerät selbst sind keinerlei Veränderungen notwendig.No changes are necessary on the device itself.
Es kann zusätzlich vorgesehen sein, daß der Saugleitungsquerschnitt beim Austritt der Saugleitung aus der Kammer mit einem Mikrofilter abgedeckt ist. Dies bürgt dafür, daß durch die Saugleitung aus der Kammer keinerlei staubförmige Partikel gesaugt werden, so daß das Saugaggregat von Staubpartikeln absolut geschützt ist.It can additionally be provided that the cross section of the suction line is covered with a microfilter when the suction line exits the chamber. This ensures that no dust-like particles are sucked out of the chamber through the suction line, so that the suction unit is absolutely protected from dust particles.
Die Kammer kann einen luftdicht verschließbaren Deckel aufweisen, der in geöffnetem Zustand den Zugang zum Inneren der Kammer freigibt. Da der Filterbeutel üblicherweise lösbar am Ende der Saugleitung gehalten ist, kann auf diese Weise der Filterbeutel bei Füllung entnommen und durch einen leeren Filterbeutel ersetzt werden.The chamber can have an airtight sealable cover, which in the open state enables access to the interior of the chamber. Since the filter bag is usually held detachably at the end of the suction line, the filter bag can be removed when it is filled and replaced with an empty filter bag.
Günstig ist es, wenn die Saugleitung in dem an beiden Seiten an die Kammer anschließenden Bereich als starres Rohr ausgebildet ist.It is expedient if the suction line is designed as a rigid tube in the region adjoining the chamber on both sides.
Die Saugleitung kann im Bereich zwischen der Kammer und dem Sammelbehälter eine lösbare Verbindung aufweisen, die vorzugsweise in dem rohrförmigen Teil der Saugleitung zwischen der Kammer und einem Griff zur Verschiebung der aus Saugdüse, rohrförmiger Saugleitung und Kammer bestehenden Baueinheit angeordnet ist. Diese von der Bedienungsperson über die zu reinigende Fläche geführte Baueinheit kann somit in einfacher Weise durch Lösen dieser Verbindung abgenommen und durch eine andere Baueinheit ersetzt werden, so daß der Übergang von der Naßsaugfunktion zur Trockensaugfunktion alleine durch diesen einen Handgriff zu bewerkstelligen ist.The suction line can have a detachable connection in the area between the chamber and the collecting container, which connection is preferably arranged in the tubular part of the suction line between the chamber and a handle for displacing the structural unit consisting of suction nozzle, tubular suction line and chamber. This assembly guided by the operator over the surface to be cleaned can thus be removed in a simple manner by loosening this connection and replaced by another assembly, so that the transition from the wet suction function to the dry suction function can be accomplished by this single action.
Die nachfolgende Beschreibung einer bevorzugten Ausführung der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigt:
- Fig. 1
- eine Seitenansicht eines Trockensaugvorsatzes mit in Längsrichtung geschnittener Kammer und
- Fig. 2
- eine Schnittansicht längs Linie 2-2 in Fig. 1.
- Fig. 1
- a side view of a dry suction attachment with a longitudinally cut chamber and
- Fig. 2
- a sectional view taken along line 2-2 in Fig. 1st
In der Zeichnung ist von dem Naß-Trockensauger nur ein Vorsatzgerät dargestellt, welches zum Aufnehmen von trockenem Staub geeignet ist. Der Naß-Trockensauger umfaßt in an sich bekannter Weise einen Schmutzbehälter, der nach außen abgedichtet und mit einem Saugaggregat verbunden ist, durch welches in dem Sammelbehälter ein Saugdruck aufgebaut wird. In den Sammelbehälter mündet eine Saugleitung ein, die mit dem in der Zeichnung dargestellten Vorsatzgerät verbunden ist.In the drawing, only one attachment is shown of the wet and dry vacuum cleaner, which is suitable for picking up dry dust. The wet and dry vacuum cleaner comprises, in a manner known per se, a dirt container which is sealed off from the outside and connected to a suction unit, by means of which a suction pressure is built up in the collecting container. A suction line opens into the collecting container, which is connected to the attachment shown in the drawing.
Dieses Vorsatzgerät umfaßt eine rohrförmige Saugleitung 1, welche eine Bodensaugdüse 2 mit einem in der Zeichnung nicht dargestellten Saugschlauch verbindet, der zu dem Sammelbehälter führt. Zu diesem Zweck weist die rohrförmige Saugleitung an ihrem oberen Ende einen Krümmer 3 auf, an den der Saugschlauch anschließbar ist. Außerdem befindet sich am oberen Ende der rohrförmigen Saugleitung 1 ein Handgriff 4, so daß die Saugdüse 2 mittels dieses Handgriffes 4 über die rohrförmige Saugleitung 1 über die zu reinigende Fläche geführt werden kann.This front attachment comprises a
In die rohrförmige Saugleitung 1 ist eine sich über einen erheblichen Teil dieser rohrförmigen Saugleitung 1 erstreckende Kammer 5 eingeschaltet. Es handelt sich dabei um eine im wesentlichen quaderförmige Kammer, die mittels eines sich über deren gesamte Länge erstreckenden Deckels 6 luftdicht verschlossen ist. Der Deckel ist abnehmbar und in seiner Schließstellung mittels an sich bekannter Riegel 7 verschließbar (Fig. 2).A
Die rohrförmige Saugleitung 1 tritt an der Saugdüsenseite in Form eines Rohrstutzens 8 in das Innere der Kammer 5 ein, am gegenüberliegenden Ende der Kammer 5 bildet die Saugleitung 1 ebenfalls einen Rohrstutzen 9 aus, der geringfügig in die Kammer 5 hineinragt. In dem dazwischen liegenden Innenraum der Kammer 5 ist ein Filterbeutel 10 angeordnet, beispielsweise ein herkömmlicher Papierfilterbeutel, der auf den Rohrstutzen 8 abgedichtet aufgeschoben ist. Der Querschnitt des Rohrstutzens 9 ist durch ein sich über den gesamten Querschnitt der Kammer 5 erstreckendes, plattenförmiges Mikrofilter 11 abgedeckt, das in einer in der Zeichnung nicht dargestellten geeigneten Halterung lösbar in der Kammer 5 befestigt ist.The
Zwischen der Kammer 5 und dem Krümmer 3 befindet sich in der rohrförmigen Saugleitung 1 eine lösbare Verbindung 12, an welcher die Saugleitung aufgetrennt werden kann. An dieser Stelle kann ein anderes Vorsatzgerät eingesetzt werden, beispielsweise eine in der Zeichnung nicht dargestellte durchgehende Saugleitung, die mit einer Saugdüse für Naßbetrieb verbunden ist.Between the
Im Betrieb des Naß-Trockensaugers wird das in der Zeichnung dargestellte Vorsatzgerät für den Trockensaugbetrieb eingesetzt. Über die Saugleitung 1 wird im Inneren der Kammer 5 ein Unterdruck erzeugt, so daß über die Saugdüse 2 Luft aus der Umgebung angesaugt wird, die in den Filterbeutel 10 ein- und durch diesen hindurchtritt. Dabei mitgerissene Staubpartikel werden in dem Filterbeutel gesammelt. Eventuell durch den Filterbeutel hindurchtretender Feinststaub wird zusätzlich in dem Mikrofilter 11 zurückgehalten, so daß in den sammelbehälterseitigen Abschnitt der Saugleitung 1 ein von Staubpartikeln jeder Größe gereinigter Luftstrom eintritt. Der Filterbeutel 10 kann bei Füllung entnommen werden, dazu wird der Deckel 6 geöffnet.In the operation of the wet and dry vacuum cleaner, the attachment shown in the drawing is used for dry vacuum operation. A negative pressure is generated in the interior of the
Will die Bedienungspersonen auf Naßsaugen umstellen, genügt es, das aus Saugdüse 2, Saugleitung 1 und Kammer 5 bestehende Bauteil durch Lösen der Verbindung 12 von dem krümmernahen Saugleitungsteil und dem Handgriff abzutrennen, an dieser Stelle kann dann ein Naßsaug-Vorsatzgerät angeschlossen werden, das in der beschriebenen Weise lediglich ein durchgehendes Saugrohr und eine Naßsaugdüse aufweist. Weitere Umstellungen oder Umbauten des Naß-Trockensaugers sind für den Übergang von Trockensaugen auf Naßsaugen nicht notwendig.If the operator wants to switch to wet suction, it is sufficient to separate the component consisting of
Wie dies in Fig. 1 dargestellt ist, verläuft die rohrförmige Saugleitung 1 von der Saugdüse 2 schräg nach oben bis zu dem Handgriff 4, so daß eine starre, gut bedienbare Einheit entsteht, die auch die in das Saugleitungsrohr integrierte Kammer 5 umfaßt. Da in dieser lediglich der trockene Staub gesammelt wird, ist die Kammer mit dem Filterbeutel nicht sehr schwer, d.h. die Handhabung dieser Baueinheit wird durch die Anordnung der Kammer und des Filters in dem Saugrohr nicht ernsthaft behindert. Besonders vorteilhaft ist dabei, daß in der Kammer keinerlei schwere Saugaggregate oder dergleichen Maschinenteile notwendig sind, da der Saugluftstrom in dem Naß-Trockensauger erzeugt wird, der stationär angeordnet oder auf Rollen hinterhergeführt werden kann. In der Kammer befindet sich lediglich die Sammeleinrichtung für trockenen Staub.As shown in Fig. 1, the
Claims (7)
- Wet-dry vacuum cleaner comprising a collecting tank for dirty liquid, a suction unit for generating a suction pressure in the collecting tank and a suction line leading from a suction nozzle to the collecting tank, characterized in that for dry vacuuming a chamber (5) is arranged in the suction line (1), said suction line (1) opening into said chamber on the side of the suction nozzle and said suction line (1) exiting said chamber again on the side of the collecting tank, and that an air-permeable and dustproof filter bag (10) is arranged in the chamber (5), said suction line (1) opening into said bag on the side of the suction nozzle.
- Vacuum cleaner as defined in claim 1, characterized in that at the exit of the suction line (1) out of the chamber (5) the suction line cross section is covered by a microfilter (11).
- Vacuum cleaner as defined in any of the preceding claims, characterized in that the chamber (5) has a lid (6) closable so as to be airtight, said lid in the opened state giving access to the interior of the chamber (5).
- Vacuum cleaner as defined in any of the preceding claims, characterized in that the filter bag (10) is held releasably on the end (8) of the suction line (1).
- Vacuum cleaner as defined in any of the preceding claims, characterized in that the suction line (1) is designed as a rigid pipe in the region adjoining the chamber (5) on both sides.
- Vacuum cleaner as defined in any of the preceding claims, characterized in that the suction line (1) comprises a releasable connection (12) in the region between chamber (5) and collecting tank.
- Vacuum cleaner as defined in claim 5 and 6, characterized in that the connection (12) is arranged in the tubular section of the suction line (1) between the chamber (5) and a handle (4) for moving the constructional unit consisting of suction nozzle (2), tubular suction line (1) and chamber (5).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893941094 DE3941094A1 (en) | 1989-12-13 | 1989-12-13 | WET DRY SUCTION |
| DE3941094 | 1989-12-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0432455A1 EP0432455A1 (en) | 1991-06-19 |
| EP0432455B1 true EP0432455B1 (en) | 1993-04-07 |
Family
ID=6395347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900121353 Expired - Lifetime EP0432455B1 (en) | 1989-12-13 | 1990-11-08 | Wet-dry vacuum cleaner |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0432455B1 (en) |
| DE (3) | DE3941094A1 (en) |
| DK (1) | DK0432455T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI1987U1 (en) * | 1995-01-30 | 1995-07-06 | Sisko Tuulikki Mussalo | Hustle rustling in the dam |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2763886A (en) * | 1950-09-26 | 1956-09-25 | Jr Charles Kepler Brown | Vacuum mop and strainer |
| US3267511A (en) * | 1964-06-01 | 1966-08-23 | Gen Floorcraft Inc | Vacuum mopping apparatus |
| DE1907117U (en) * | 1964-08-04 | 1964-12-23 | Siemens Elektrogeraete Gmbh | FILTER ATTACHMENT FOR VACUUM CLEANER. |
| US3570773A (en) * | 1968-08-15 | 1971-03-16 | Rex Chainbelt Inc | Chipper feeder |
| US3942963A (en) * | 1973-02-15 | 1976-03-09 | Tevis-Campbell Corporation | Vacuum cleaning system |
| SE375231B (en) * | 1973-10-05 | 1975-04-14 | Electrolux Ab | |
| US3966444A (en) * | 1975-04-04 | 1976-06-29 | The Singer Company | Vacuum cleaner filter assembly |
| CA1066005A (en) * | 1978-03-20 | 1979-11-13 | Fernand Lachance | Liquid aspirator |
| US4179769A (en) * | 1978-10-19 | 1979-12-25 | Lundquist Robert H | Vacuum cleaner attachment for vacuuming liquids |
| US4226000A (en) * | 1979-02-23 | 1980-10-07 | Herbert Tribolet | Wet and dry vacuum cleaning system |
-
1989
- 1989-12-13 DE DE19893941094 patent/DE3941094A1/en not_active Withdrawn
- 1989-12-13 DE DE8915482U patent/DE8915482U1/de not_active Expired - Lifetime
-
1990
- 1990-11-08 DE DE9090121353T patent/DE59001172D1/en not_active Expired - Fee Related
- 1990-11-08 DK DK90121353T patent/DK0432455T3/en active
- 1990-11-08 EP EP19900121353 patent/EP0432455B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3941094A1 (en) | 1991-06-20 |
| DK0432455T3 (en) | 1993-05-24 |
| DE8915482U1 (en) | 1991-02-21 |
| DE59001172D1 (en) | 1993-05-13 |
| EP0432455A1 (en) | 1991-06-19 |
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