EP0172900B1 - Plant for the transport and/or mixture of gas - Google Patents

Plant for the transport and/or mixture of gas Download PDF

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Publication number
EP0172900B1
EP0172900B1 EP85901402A EP85901402A EP0172900B1 EP 0172900 B1 EP0172900 B1 EP 0172900B1 EP 85901402 A EP85901402 A EP 85901402A EP 85901402 A EP85901402 A EP 85901402A EP 0172900 B1 EP0172900 B1 EP 0172900B1
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EP
European Patent Office
Prior art keywords
propeller
plant
flow
gases
gas
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
Application number
EP85901402A
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German (de)
French (fr)
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EP0172900A1 (en
Inventor
Werner MÖLLER
Matthias BRÜNIG
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Individual
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Individual
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Publication date
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Priority to AT85901402T priority Critical patent/ATE31967T1/en
Publication of EP0172900A1 publication Critical patent/EP0172900A1/en
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Publication of EP0172900B1 publication Critical patent/EP0172900B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/14—Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a method for heat dissipation from devices is known, in which the fact is exploited that a jet stream directed onto a vertical wall sucks a multiple of its own volume per time from its surroundings, leads and slides along the wall. This gives the particular advantage that a relatively large cooling effect can nevertheless be achieved with a relatively low compressor output for the jet.
  • the present invention applies this principle, e.g. B. in mixing operations when different streams (gases, flue gases, vapors, drippable liquids, fluids, media and the like.) Are to be brought together, for example when smoking food, when supplying air to a burner, when extracting gases from one Hob and the like
  • a pumping tool for the transport of liquid with two identical screw-shaped driving surfaces on a propeller in the shape of a cone is known (NL-C-20 573), but it has the disadvantage that only a relatively small amount of liquid from a room on a certain geodetic Height can be pumped to another room at a different height.
  • the present invention is also directed to realizing the flow pattern of a jet stream directed onto a wall differently than previously known. This is possible, for example, with a tapered propeller with outer or inner helical guide parts, blades or drive surfaces. If an air flow emerging from a nozzle occurs at a certain distance on a baffle surface perpendicular to the flow, this flow is deflected, the air moving along the baffle surface. It has now been recognized that this relatively small air flow (primary flow) from the surrounding area pulls a relatively large secondary flow, which initially does not have the direction of the flow running on the wall, but has a strong flow velocity component in the direction of the stagnation point.
  • This fact can now be used primarily for mixing media flows, but it is also suitable for depositing or removing a relatively large amount of heat on the impact surface or for extracting air from the interior of a device or room.
  • the use for extractor hoods in kitchens is also particularly important because a large amount of air and haze can be extracted with a small, relatively slow-running and low-noise propeller.
  • FIG. 1 shows a device according to the invention, which essentially consists of a conical propeller 10. This is arranged in an opening in a wall, a baffle surface 11 being provided above the opening and being at a certain distance from the wall surface.
  • Fig. 1 the flow threads are drawn, which show that essential parts of the flow is used directly on the impact point or the axis of the propeller 10.
  • the propeller 10 is shown directly in front of the impact surface 11, which is also the wall surface of a room.
  • the flow threads show how gas is drawn in from the interior and guided along the wall.
  • FIG 3 shows an application of the device according to the invention in connection with a kitchen extractor hood.
  • the propeller 10 is again arranged directly in front of the baffle 11. This is a fixed surface which is surrounded by a housing 14. At the lower end, the housing 14 is open, so that vapors and gases can enter the opening and can be discharged upwards through a chimney or a pipe. Not shown are the drive means for the propeller 10, which, however, is rotated about its axis.
  • annular interchangeable plate 13 is also attached to the baffle 11, which plate consists, for example, of an absorbent material. If the vapors or gases are then sucked in with the aid of the propeller 10, floating particles in the gas (for example fat droplets, dust and the like) are thrown onto the plate 13, so that no exhaust air filter is required, which results in a pressure loss in the flow would mean.
  • the individual partial surfaces 1, 2 and 4 can be made of plastic or thin sheet metal and can be attached to one another after appropriate shaping.
  • the driving surface 1 corresponds to the driving surface 2, but these are offset by 180 ° to one another.
  • the interconnected surfaces form opening genes 3, which are oriented approximately 45 ° to the axis, so that gas sucked in can enter through them and can be conveyed essentially axially inwards and released at the lower end (FIG. 4).
  • the main advantage of this propeller is: production by injection molding without undercut and conveyance over the entire circular area (via the holes internal flow, via the drive surfaces 2 external flow).
  • the internal motor allows the drive motor to be cooled.
  • the propellant surfaces 1 and 2 can be made with a suitable arrangement on a cone made of soft, resilient material (rubber), so that they deform in a certain way as a result of the rotation of the propeller and the centrifugal forces resulting therefrom and enable the desired air delivery. In this case, no protective grille is required for the tapered rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ventilation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Plant for the transport of gas, liquids and the like, by means of a propeller (10) which is in principle conical and which sucks the gas or liquids and forwards them. The propeller (10) is comprised of at least two guiding plates shaped like helicoidal surfaces and comprising openings in the tip area. The propeller may be arranged against a baffle plate (11).

Description

Die Erfindung bezieht sich auf eine Vorrichtung gemäß Oberbegriff des Patentanspruchs 1. Es ist ein Verfahren zur Wärmeabfuhr aus Geräten bekannt, bei welchem die Tatsache ausgenutzt wird, daß ein auf eine senkrechte Wand gerichteter Düsenstrom ein Mehrfaches seines eigenen Volumens pro Zeit aus seiner Umgebung ansaugt, mit sich führt und an der Wand entlanggleitet. Dadurch entsteht der besondere Vorteil, daß mit relativ geringer Kompressorleistung für den Düsenstrahl dennoch eine relativ große Kühlwirkung erzielt werden kann.The invention relates to a device according to the preamble of claim 1. A method for heat dissipation from devices is known, in which the fact is exploited that a jet stream directed onto a vertical wall sucks a multiple of its own volume per time from its surroundings, leads and slides along the wall. This gives the particular advantage that a relatively large cooling effect can nevertheless be achieved with a relatively low compressor output for the jet.

Die vorliegende Erfindung wendet dieses Prinzip an, z. B. bei Mischvorgängen, wenn unterschiedliche Ströme (Gase, Rauchgase, Dämpfe, tropfbare Flüssigkeiten, Fluide, Medien und dergl.) zusammengebracht werden sollen, beispielsweise beim Räuchern von Lebensmitteln, bei der Zufuhr von Luft zu einem Brenner, beim Absaugen von Gasen von einer Kochstelle und dgl.The present invention applies this principle, e.g. B. in mixing operations when different streams (gases, flue gases, vapors, drippable liquids, fluids, media and the like.) Are to be brought together, for example when smoking food, when supplying air to a burner, when extracting gases from one Hob and the like

Ein Pumpwerkzeug für den Transport von Flüssigkeit mit zwei gleichen schraubenförmig ausgebildeten Treibflächen an einem Propeller in Kegelform ist bekannt (NL-C-20 573), sie hat jedoch den Nachteil, daß nur eine relativ geringe Menge an Flüssigkeit von einem Raum auf einer bestimmten geodätischen Höhe zu einem anderen Raum auf anderer Höhe gepumpt werden kann.A pumping tool for the transport of liquid with two identical screw-shaped driving surfaces on a propeller in the shape of a cone is known (NL-C-20 573), but it has the disadvantage that only a relatively small amount of liquid from a room on a certain geodetic Height can be pumped to another room at a different height.

Die vorliegende Erfindung ist auch darauf gerichtet, das Strömungsbild eines auf eine Wand gerichteten Düsenstroms anders als bislang bekannt zu realisieren. Dies ist beispielsweise durch einen kegeligen Propeller mit äußeren oder inneren schraubenförmigen Leitteilen, Laufschaufeln oder Treibflächen möglich. Tritt ein aus einer Düse austretender Luftstrom in einem gewissen Abstand auf eine senkrecht zur Strömung stehende Prallfläche, so tritt eine Umlenkung dieser Strömung ein, wobei die Luft sich an der Prallfläche entlangbewegt. Es ist nun erkannt worden, daß dieser relativ kleine Luftstrom (Primärströmung) aus dem Umgebungsbereich eine relativ große Sekundärströmung an sich reißt, welcher zunächst nicht die Richtung der an der Wand verlaufenden Strömung hat, sondern eine starke Strömungsgeschwindigkeitskomponente in Richtung auf den Staupunkt aufweist. Diese Tatsache kann nun vor allem zum Vermischen von Medienströmen eingesetzt werden, sie ist allerdings auch geeignet, eine relativ große Wärmemenge auf der Prallfläche abzusetzen bzw. von dieser abzunehmen oder Luft aus dem Innenraum eines Geräts oder Raumes herauszufördern. Besonders bedeutend ist auch die Anwendung für Dunstabzugshauben in Küchen, weil hier mit einem kleinen, relativ langsam laufenden und geräuscharmen Propeller eine große Luft- und Dunstmenge abgesaugt werden kann.The present invention is also directed to realizing the flow pattern of a jet stream directed onto a wall differently than previously known. This is possible, for example, with a tapered propeller with outer or inner helical guide parts, blades or drive surfaces. If an air flow emerging from a nozzle occurs at a certain distance on a baffle surface perpendicular to the flow, this flow is deflected, the air moving along the baffle surface. It has now been recognized that this relatively small air flow (primary flow) from the surrounding area pulls a relatively large secondary flow, which initially does not have the direction of the flow running on the wall, but has a strong flow velocity component in the direction of the stagnation point. This fact can now be used primarily for mixing media flows, but it is also suitable for depositing or removing a relatively large amount of heat on the impact surface or for extracting air from the interior of a device or room. The use for extractor hoods in kitchens is also particularly important because a large amount of air and haze can be extracted with a small, relatively slow-running and low-noise propeller.

Die Erfindung wird nachstehend beispielsweise an Hand der Zeichnung erläutert.

  • Fig. 1 zeigt eine schaubildliche Ansicht einer Vorrichtung gemäß der Erfindung zum Absaugen von Gasen.
  • Fig. 2 zeigt eine schaubildliche Ansicht einer Vorrichrung gemäß der Erfindung zum Umwälzen und Mischen von Gasen.
  • Fig. 3 zeigt eine schaubildliche Ansicht einer Dunstabzugshaube für Kochstellen.
  • Fig. 4 zeigt eine schaubildliche Ansicht eines Propellers gemäß der Erfindung.
  • Fig. 5 zeigt eine Ansicht von unten in den in Fig. 4 gezeigten Propeller.
The invention is explained below, for example with reference to the drawing.
  • Fig. 1 shows a perspective view of a device according to the invention for suction of gases.
  • Fig. 2 shows a perspective view of a device according to the invention for circulating and mixing gases.
  • Fig. 3 shows a perspective view of an extractor hood for hobs.
  • Fig. 4 shows a perspective view of a propeller according to the invention.
  • FIG. 5 shows a bottom view of the propeller shown in FIG. 4.

In der Fig. 1 ist eine Vorrichtung gemäß der Erfindung gezeigt, die im wesentlichen aus einem kegelförmigen Propeller 10 besteht. Dieser ist in einer Öffnung einer Wandung angeordnet, wobei oberhalb der Öffnung eine Prallfläche 11 vorgesehen ist, welche einen bestimmten Abstand zur Wandungsfläche aufweist.1 shows a device according to the invention, which essentially consists of a conical propeller 10. This is arranged in an opening in a wall, a baffle surface 11 being provided above the opening and being at a certain distance from the wall surface.

Wird der Propeller 10 in Drehung versetzt, so wird aus dem Raum unterhalb der Wandungsfläche bzw. der Prallfläche Gas angesaugt und auf die Prallfläche 11 gelenkt. Von dorther wird sie über den Zwischenraum zwischen der Wandungsfläche und der Prallfläche nach außen geleitet.If the propeller 10 is rotated, gas is drawn in from the space below the wall surface or the baffle surface and directed onto the baffle surface 11. From there it is led to the outside through the space between the wall surface and the baffle surface.

In der Fig. 1 sind die Strömungsfäden eingezeichnet, die erkennen lassen, daß wesentliche Teile der Strömung direkt auf den Prallpunkt bzw. die Achse des Propellers 10 herangezogen wird.In Fig. 1, the flow threads are drawn, which show that essential parts of the flow is used directly on the impact point or the axis of the propeller 10.

In Fig. 2 ist der Propeller 10 direkt vor der Prallffläche 11, die zugleich Wandungsfläche eines Raumes ist, gezeigt. Auch hier lassen die Strömungsfäden erkennen, wie aus dem Innenraum Gas angesaugt wird und an der Wand entlanggeführt wird.2, the propeller 10 is shown directly in front of the impact surface 11, which is also the wall surface of a room. Here, too, the flow threads show how gas is drawn in from the interior and guided along the wall.

In Fig. 3 ist eine Anwendung der Vorrichtung gemäß der Erfindung im Zusammenhang mit einer Küchen-Dunstabzugshaube gezeigt.3 shows an application of the device according to the invention in connection with a kitchen extractor hood.

Es ist wiederum der Propeller 10 unmittelbar vor der Prallfläche 11 angeordnet. Es handelt sich hierbei um eine feststehende Fläche, die von einem Gehäuse 14 umgeben ist. Am unteren Ende ist das Gehäuse 14 offen ausgebildet, so daß Dünste und Gase in die Öffnung eintreten können und nach oben durch einen Schornstein oder eine Rohrleitung abgeführt werden können. Nicht gezeigt sind die Antriebsmittel für den Propeller 10, der jedoch um seine Achse gedreht wird.The propeller 10 is again arranged directly in front of the baffle 11. This is a fixed surface which is surrounded by a housing 14. At the lower end, the housing 14 is open, so that vapors and gases can enter the opening and can be discharged upwards through a chimney or a pipe. Not shown are the drive means for the propeller 10, which, however, is rotated about its axis.

Als Besonderheit ist an der Prallfläche 11 noch eine ringförmige auswechselbare Platte 13 angebracht, die beispielsweise aus einem saugfähigen Material besteht. Werden dann die Dünste oder Gase mit Hilfe des Propellers 10 angesaugt, so werden Schwebeteilchen in dem Gas (z. B. Fetttröpfchen, Staub und dgl.) auf die Platte 13 abgeschleudert, so daß kein Abluftfilter erforderlich ist, der einen Druckverlust in der Strömung bedeuten würde.As a special feature, an annular interchangeable plate 13 is also attached to the baffle 11, which plate consists, for example, of an absorbent material. If the vapors or gases are then sucked in with the aid of the propeller 10, floating particles in the gas (for example fat droplets, dust and the like) are thrown onto the plate 13, so that no exhaust air filter is required, which results in a pressure loss in the flow would mean.

In Fig. 3 sind mit den Bezugzahlen 101 bis 106 Strömungsfäden dargestellt, die durch experimentelle Versuche belegt werden konnten. Bedeutsam ist, daß nicht nur die Strömung im Bereich des Strömungsfadens 106 vorhanden ist, sondern daß aus weit entfernten Bereichen der Dunstabzugshaube (Bereich der Strömungsfäden 101 bis 103) Gase angesaugt werden. Es handelt sich hierbei um Gasmengen, die erheblich größer sind als die Strömungsmenge im Bereich des Strömungsfadens 106. Demzufolge kann das Absaugsystem wesentlich kleiner ausgeführt werden, als dies bislang möglich war. Beispielsweise kann auch der Abstand der Abzugshaube in bezug auf die Kochfläche wesentlicn erhöht werden, so daß für die Köchin eine größere Kopffreiheit gegeben ist. Darüberhinaus kann der Propeller 10 mit einer relativ niedrigen Drehzahl arbeiten, so daß eine geräuscharme Absaugung der Dünste möglich ist.In Fig. 3 with the reference numbers 101 to 106 flow threads are shown, which could be verified by experimental tests. It is important that not only is the flow in the area of the flow line 106, but that gases are drawn in from far away areas of the extractor hood (area of the flow lines 101 to 103). These are gas quantities that are considerably larger than the flow quantity in the area of the flow thread 106. As a result, the suction system can be made significantly smaller than was previously possible. For example, the distance between the extractor hood and the cooking surface can be increased considerably, so that the cook has greater headroom. In addition, the propeller 10 can operate at a relatively low speed, so that a quiet extraction of the fumes is possible.

Die Fig. 4 und 5 zeigen eine Ausführungsform des Propellers gemäß der Erfindung. Es handelt sich hierbei um ein im wesentlichen kegelförmiges Gebilde, das um seine Kegelachse gedreht wird. Die einzelnen Teilflächen 1, 2 und 4 können aus Kunststoff oder dünnem Blech hergestellt werden und nach entsprechender Formgebung aneinander befestigt werden. Die Treibfläche 1 entspricht dabei der Treibfläche 2, allerdings sind diese zueinander um 180° versetzt angeordnet. Die miteinander verbundenen Flächen bilden Öffnunggen 3, die etwa 45° zur Achse gerichtet sind, so daß durch diese angesaugtes Gas eintreten kann und im wesentlichen axial nach innen gefördert und am unteren Ende (Fig. 4) abgegeben werden kann. Der wesentliche Vorteil dieses Propellers ist: Fertigung im Spritzgußverfahren ohne Hinterschnitt und Förderung über die gesamte Kreisfläche (über die Löcher Innenstrom, über die Treibflächen 2 Außenstrom). Durch den Innenstrom ist die Kühlung des Antriebsmotors möglich.4 and 5 show an embodiment of the propeller according to the invention. It is an essentially conical structure that is rotated about its cone axis. The individual partial surfaces 1, 2 and 4 can be made of plastic or thin sheet metal and can be attached to one another after appropriate shaping. The driving surface 1 corresponds to the driving surface 2, but these are offset by 180 ° to one another. The interconnected surfaces form opening genes 3, which are oriented approximately 45 ° to the axis, so that gas sucked in can enter through them and can be conveyed essentially axially inwards and released at the lower end (FIG. 4). The main advantage of this propeller is: production by injection molding without undercut and conveyance over the entire circular area (via the holes internal flow, via the drive surfaces 2 external flow). The internal motor allows the drive motor to be cooled.

Die Treibflächen 1 und 2 können bei geeigneter Anordnung an einem Kegel aus weichem nachgiebigem Material (Gummi) hergestellt werden, so daß sie sich zufolge Drehung des Propellers und der dadurch entstehenden Zentrifugalkräfte in bestimmter Weise verformen und die gewünschte Luftförderung ermöglichen. In diesem Fall ist kein Schutzgitter für den Konusläufer erforderlich.The propellant surfaces 1 and 2 can be made with a suitable arrangement on a cone made of soft, resilient material (rubber), so that they deform in a certain way as a result of the rotation of the propeller and the centrifugal forces resulting therefrom and enable the desired air delivery. In this case, no protective grille is required for the tapered rotor.

Claims (2)

1. Plant for the transport or mixture bf gases, flue gases, vapors or liquids, where a conical propeller (10) consisting of at least two equal helical blades (1, 2) draws and transports the gases or liquids, characterized in that the blades (1, 2) are equally spaced around a circumference of the propeller and are interconnected by essentially conical blade portions (4) such that each blade (1, 2) is disposed inwardly of a blade portion (4) at the suction side of the propeller and forms an aperture and is disposed at the expelling side of the propeller outwardly of that blade portion (4) which is the closest in circumferential direction, so that the plant exhibits a conveying area within as well as outside the blade portions (4).
2. Plant according to claim 1, characterized in that the propeller (10) is disposed at a baffle plate (11).
EP85901402A 1984-02-25 1985-02-20 Plant for the transport and/or mixture of gas Expired EP0172900B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85901402T ATE31967T1 (en) 1984-02-25 1985-02-20 DEVICE FOR TRANSPORTING AND/OR MIXING GASES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3406868 1984-02-25
DE3406868A DE3406868A1 (en) 1984-02-25 1984-02-25 APPLICATION OF A FLOW TO MIX MEDIA AND DEVICE FOR GENERATING A FLOW

Publications (2)

Publication Number Publication Date
EP0172900A1 EP0172900A1 (en) 1986-03-05
EP0172900B1 true EP0172900B1 (en) 1988-01-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85901402A Expired EP0172900B1 (en) 1984-02-25 1985-02-20 Plant for the transport and/or mixture of gas

Country Status (6)

Country Link
US (1) US4648787A (en)
EP (1) EP0172900B1 (en)
JP (2) JPS61501275A (en)
DE (2) DE3406868A1 (en)
IT (1) IT1182468B (en)
WO (1) WO1985003745A1 (en)

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DE3700152C2 (en) * 1987-01-05 1993-11-18 Matthias Prof Bruenig Device for separating dust
US5137417A (en) * 1991-06-12 1992-08-11 Lund Arnold M Wind energy conversion system
DE10040837C1 (en) * 2000-08-21 2002-05-23 Stolle Herbert D Aura Jacked propeller
US6981839B2 (en) * 2004-03-09 2006-01-03 Leon Fan Wind powered turbine in a tunnel
JP6792786B2 (en) * 2016-06-20 2020-12-02 東京エレクトロン株式会社 Gas mixer and substrate processing equipment

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US2985952A (en) * 1961-05-30 Method of construction of three dimensional
US181084A (en) * 1876-08-15 Improvement in water-wheels
DE704592C (en) * 1934-10-07 1941-04-02 I G Farbenindustrie Akt Ges Device for the fine distribution of gases in liquids
FR971346A (en) * 1940-02-03 1951-01-16 Spiral rotor
DE927920C (en) * 1953-01-31 1955-05-20 Paul Ritzau Device and method for atomizing, distributing and mixing liquid or powdery substances
JPS328084Y1 (en) * 1955-05-04 1957-07-29
US3035781A (en) * 1958-11-28 1962-05-22 Grubbens & Co Aktiebolag Pulpers
DE2031914A1 (en) * 1970-06-27 1972-01-13 Siemens Ag Device for ventilating rooms
JPS5253241Y2 (en) * 1972-06-29 1977-12-02
DE2406458A1 (en) * 1974-02-12 1975-08-14 Wilhelm Gebhardt Roof fan for outlet end of vent - with silencer on pressure side forming part of housing
DE2634496C2 (en) * 1976-07-31 1985-10-17 Bayer Ag, 5090 Leverkusen Injector for gassing a liquid
CH626953A5 (en) * 1977-10-13 1981-12-15 Sulzer Ag Centrifugal pump
JPS5730464Y2 (en) * 1978-03-17 1982-07-03
JPS5548200A (en) * 1978-10-04 1980-04-05 Yasui Sangyo Co Ltd Automobile support device in twooposts lift
JPS5749623U (en) * 1980-09-02 1982-03-20
NL8200674A (en) * 1981-02-26 1982-09-16 Barcellini Lauro MIXING AND STIRRING EQUIPMENT INTENDED FOR THE CONSTRUCTION SITE, IN PARTICULAR FOR CEMENT, SPECIES, MORTAR AND INERT MATERIAL.
CH654649A5 (en) * 1981-08-18 1986-02-28 Globogal Ag AIR SUPPLY DEVICE.
CH660511A5 (en) * 1982-12-22 1987-04-30 Martin Staehle Centrifugal pump having a single-blade impeller

Also Published As

Publication number Publication date
JP2557672Y2 (en) 1997-12-10
WO1985003745A1 (en) 1985-08-29
IT1182468B (en) 1987-10-05
DE3561411D1 (en) 1988-02-18
JPS61501275A (en) 1986-06-26
IT8567190A0 (en) 1985-02-25
US4648787A (en) 1987-03-10
EP0172900A1 (en) 1986-03-05
IT8567190A1 (en) 1986-08-25
DE3406868A1 (en) 1985-09-12
JPH0676686U (en) 1994-10-28

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