EP2113054B1 - Impeller made of flat material - Google Patents

Impeller made of flat material Download PDF

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Publication number
EP2113054B1
EP2113054B1 EP08759127A EP08759127A EP2113054B1 EP 2113054 B1 EP2113054 B1 EP 2113054B1 EP 08759127 A EP08759127 A EP 08759127A EP 08759127 A EP08759127 A EP 08759127A EP 2113054 B1 EP2113054 B1 EP 2113054B1
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EP
European Patent Office
Prior art keywords
impeller
blades
impeller according
attachment parts
bent
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EP08759127A
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German (de)
French (fr)
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EP2113054A1 (en
Inventor
Thomas Materne
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Wilo SE
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Wilo SE
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    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2233—Construction and assembly entirely open or stamped from one sheet
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans

Definitions

  • the invention relates to an impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region, on the outer edge of the blades are formed and bent.
  • a sheet wheel with low flow is from the DE 3717229 A1 known.
  • the central region of the impeller plate is deformed to a central sleeve which projects on the rear side of the impeller and in which the pump shaft can be fastened.
  • the production of such a cylindrical scar is relatively expensive.
  • a blower with a propeller whose central portion is bent to a circular region on which a shaft can be fastened.
  • the object of the invention is to improve an impeller of the type mentioned so that it has a low weight and thus a low moment of inertia with simple cost-effective production. It is also an object of the invention to provide an impeller that allows easy installation and is suitable for smaller pumps or blowers.
  • the fasteners formed in this way represent a particularly easy to manufacture attachment for the pump / fan or for the motor shaft.
  • the impeller has a very low weight and thus a low moment of inertia.
  • the mounting on the bent-back fastening parts is particularly simple.
  • a particularly advantageous production with optimum use of the material is achieved when the fasteners sit in the non-bent state in a region of the sheet material, which is formed by a taper of an adjacent blade.
  • particularly favorable conveying impeller blades are created, wherein the taper of the blades near the blade root allows a simple rotation of the blade.
  • the radial extent of the fastening parts is a quarter to a sixth of the impeller diameter. Furthermore, it is advantageous if the fastening parts are bent backwards by at least 90 degrees. A secure hold on positive engagement with the shaft is achieved when the fasteners are curved in their surface corresponding to the surface of the pump shaft.
  • the blades are turned for bending about an axis substantially the longitudinal direction of the blade equivalent.
  • the blades are rotated about an axis which corresponds to a radius of the impeller or is parallel to a radius of the impeller or is at an acute angle to a radius of the impeller.
  • the impeller 1 of a pump or a blower is punched out of a one-piece, sheet material, in particular made of sheet metal and then has the in Fig. 1 illustrated form. It has a central central region 2, on which blades 3 are formed in an approximately radial direction. Within an inner region 6, which is larger than the central region 2, the remaining material areas remaining between the blades 3 are used as fastening parts 4, the fastening parts 4 and the blades 3 adjoining each other except for the stamped slots 5 located therebetween.
  • Each blade 3 has an outer wider portion 3a which tapers outwardly and an inner portion 3b which tapers towards the center of the rotor and forms a narrow foot portion 3c which merges into the central portion 2.
  • the concave taper 3d of the blade 3 surrounds a correspondingly shaped convex bulge 4a of the fastening part 4. The blades 3 thus protrude with their outer region 3a beyond the inner region 6, while the fastening parts 4 remain within the region 6 and with their outer ends adjoin this.
  • the blades 3 are each bent by an impeller radius towards the front of the impeller, wherein in this bending only the foot region 3c is wound.
  • the blades are thus rotated about an axis A, which corresponds to a radius of the running radius. Instead, however, the axis of rotation A may be parallel to a radius of the impeller or at an acute angle to the radius. In any of these cases, however, all or most of the blade 3 is bent over to the front of the impeller. This bend can be 90 degrees or deviate from it.
  • the fastening parts 4 are bent around a tangent B of the central region 2 to the rear by at least 90 degrees to form a mounting space 7, in which the pump shaft 8 can be inserted.
  • the fasteners 4 surrounded so all around the shaft 8, wherein the fasteners 4 may be curved in its surface corresponding to the surface of the pump shaft, so that all fasteners together with their inner sides as it forms a socket for the shaft 8 and with their inner sides on the outer surface of the Wave 8 abut.
  • the blades 3 may be curved in their surface in order to increase the hydraulic efficiency in a preferred direction. Furthermore, the blades may have the same or different structures and the number of blades 3 corresponds to the particular hydraulic requirements for the impeller. To form the fastening parts 4, not the entire material areas located between the blades 3 have to be used. Elongated subareas, in particular in web form, are also sufficient for this purpose.
  • the fasteners 4 can give the hub a conical shape, so that a secure hold against twists and displacements of the impeller is given on the shaft.
  • a material for the impeller sheet are chairs that have sufficient rigidity, have a suitable spring action to prevent deformation and thus allow secure attachment of the shaft.
  • stainless steel is to be preferred.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Mechanical Operated Clutches (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to an impeller (1) of a pump or a fan, made of a single piece of material, particularly sheet metal, having a flat central region (2). The vanes (3) are formed on the outer edge of said region and are bent, wherein remaining material regions between the vanes (3) are bent partially towards the back and form fastening elements for the pump shaft (8).

Description

Die Erfindung betrifft ein Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen Material insbesondere aus Blech mit einem ebenen Zentralbereich, an dessen Außenrand die Schaufeln angeformt und umgebogen sind.The invention relates to an impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region, on the outer edge of the blades are formed and bent.

Ein Blechlaufrad mit kleiner Förderleistung ist aus der DE 3717229 A1 bekannt. Zum Erzeugen einer Nabe ist der mittlere Bereich des Laufradbleches zu einer zentralen Buchse verformt, die an der Rückseite des Laufrades vorsteht und in der die Pumpenwelle befestigbar ist. Das Herstellen einer solchen zylindrischen Narbe ist verhältnismäßig aufwendig. Ferner ist aus der GB-A-440 587 , die alle Merkmale des Oberbegriffs des Anspruchs 1 offenbart, ein Gebläse mit einem Propeller bekannt, dessen mittlerer Bereich zu einem kreisförmigen Bereich gebogen ist, an dem eine Welle befestigbar ist.A sheet wheel with low flow is from the DE 3717229 A1 known. For generating a hub, the central region of the impeller plate is deformed to a central sleeve which projects on the rear side of the impeller and in which the pump shaft can be fastened. The production of such a cylindrical scar is relatively expensive. Furthermore, from the GB-A-440 587 discloses all the features of the preamble of claim 1, a blower with a propeller whose central portion is bent to a circular region on which a shaft can be fastened.

Aufgabe der Erfindung ist es, ein Laufrad der eingangs genannten Art so zu verbessern, dass es bei einfacher kostengünstiger Herstellung ein geringes Gewicht und damit ein niedriges Massenträgheitsmoment besitzt. Auch ist es Aufgabe der Erfindung, ein Laufrad zu schaffen, dass eine einfache Montage erlaubt und für kleinere Pumpen oder Gebläse geeignet ist.The object of the invention is to improve an impeller of the type mentioned so that it has a low weight and thus a low moment of inertia with simple cost-effective production. It is also an object of the invention to provide an impeller that allows easy installation and is suitable for smaller pumps or blowers.

Diese Aufgaben werden erfingdungsgemäß dadurch gelöst, dass zwischen den Schaufeln befindliche restliche Materialbereiche insbesondere zu einem Teil zur Rückseite hin umgebogen sind und Befestigungsteile für die Pumpenwelle bilden, wobei die Befestigungsteile so weit zur Rückseite hin umgebogen sind, dass sie zur Bildung der Laufradnabe einen Raum umgrenzen, in oder an dem die Pumpenwelle befestigbar ist.According to the invention, these objects are achieved by virtue of the fact that residual material areas located between the blades are in particular bent over in part towards the rear and form fastening parts for the pump shaft, the fastening parts being bent so far towards the rear side, that they define a space to form the impeller hub, in or on which the pump shaft is fastened.

Die auf diese Weise gebildeten Befestigungsteile stellen eine besonders einfach herstellbare Befestigung für die Pumpen-/Gebläse- bzw. für die Motorenwelle dar. Hierbei hat das Laufrad ein besonders geringes Gewicht und damit ein niedriges Massenträgheitsmoment. Auch ist die Montage an den zurückgebogenen Befestigungsteilen besonders einfach.The fasteners formed in this way represent a particularly easy to manufacture attachment for the pump / fan or for the motor shaft. Here, the impeller has a very low weight and thus a low moment of inertia. Also, the mounting on the bent-back fastening parts is particularly simple.

Eine vorteilhafte Ausführung ist dann gegeben, wenn ein insbesondere stegförmiger Teilbereich der zwischen den Schaufeln befindlichen Materialbereiche zur Rückseite hin umgebogen ist. Auch können die Befestigungsteile um eine Tangente des Zentralbereichs nach hinten umgebogen sein.An advantageous embodiment is given when a particular web-shaped portion of the material areas located between the blades is bent to the rear side. Also, the fasteners may be bent back around a tangent of the central region.

Eine besonders vorteilhafte Herstellung bei optimaler Nutzung des Materials wird erreicht, wenn die Befestigungsteile im nicht umgebogenen Zustand in einem Bereich des flächigen Materials sitzen, der durch eine Verjüngung einer benachbarten Schaufel gebildet ist. Hierdurch werden darüber hinaus besonders günstige förderwirksame Laufradschaufeln geschaffen, wobei die Verjüngung der Schaufeln nahe des Schaufelfußes eine einfache Verdrehung der Schaufel erlaubt.A particularly advantageous production with optimum use of the material is achieved when the fasteners sit in the non-bent state in a region of the sheet material, which is formed by a taper of an adjacent blade. In this way, moreover, particularly favorable conveying impeller blades are created, wherein the taper of the blades near the blade root allows a simple rotation of the blade.

Vorzugsweise wird vorgeschlagen, dass die radiale Erstreckung der Befestigungsteile ein Viertel bis ein Sechstel des Laufraddurchmessers beträgt. Ferner ist es von Vorteil, wenn die Befestigungsteile um mindestens 90 Grad nach hinten umgebogen sind. Ein sicherer Halt bei Formschluss an der Welle wird erreicht, wenn die Befestigungsteile in ihrer Fläche entsprechend der Oberfläche der Pumpenwelle gewölbt sind.It is preferably proposed that the radial extent of the fastening parts is a quarter to a sixth of the impeller diameter. Furthermore, it is advantageous if the fastening parts are bent backwards by at least 90 degrees. A secure hold on positive engagement with the shaft is achieved when the fasteners are curved in their surface corresponding to the surface of the pump shaft.

Bei einem Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen flächigen Material insbesondere aus Blech mit am Außenrand angeformten Schaufeln wird vorgeschlagen, dass die Schaufeln zum Umbiegen um eine Achse gedreht sind, die im Wesentlichen der Längsausrichtung der Schaufel entspricht. Durch eine solche Ausgestaltung gelingt es, verhältnismäßig große und sich lang erstreckende Schaufeln zu schaffen bei verhältnismäßig kleinem inneren pumpenunwirksamen Zentralbereich. Hierzu wird vorzugsweise vorgeschlagen, dass die Schaufeln um eine Achse gedreht sind, die einem Radius des Laufrades entspricht oder parallel zu einem Radius des Laufrades ist oder in einem spitzen Winkel zu einem Radius des Laufrades steht.In an impeller of a pump or a blower made of a one-piece sheet material, in particular made of sheet metal with blades formed on the outer edge, it is proposed that the blades are turned for bending about an axis substantially the longitudinal direction of the blade equivalent. By such a configuration, it is possible to create relatively large and long-extending blades at relatively small inner pump ineffective central area. For this purpose, it is preferably proposed that the blades are rotated about an axis which corresponds to a radius of the impeller or is parallel to a radius of the impeller or is at an acute angle to a radius of the impeller.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den übrigen Ansprüchen enthalten und führen zu optimalen Pumpleistungen, zu einfacher und preiswerter Herstellung und einer optimalen Nutzung des Materials.Further advantageous embodiments of the invention are contained in the other claims and lead to optimum pumping performance, to simple and inexpensive production and optimal use of the material.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben.An embodiment of the invention is illustrated in the drawings and will be described in more detail below.

Es zeigen:

Fig. 1
eine Draufsicht auf das das Laufrad bildende Blechteil nach seiner Ausstanzung und vor dem Ab- bzw. Umbiegen der Schaufeln und der Befestigungsteile,
Fig. 2
eine Schrägansicht ohne Pumpenwelle und
Fig. 3
eine Schrägansicht mit einliegender Pumpenwelle.
Show it:
Fig. 1
a plan view of the impeller forming sheet metal part after its punching and before the bending or bending of the blades and the fastening parts,
Fig. 2
an oblique view without pump shaft and
Fig. 3
an oblique view with enclosed pump shaft.

Das Laufrad 1 einer Pumpe oder eines Gebläses ist aus einem einstückigen, flächigen Material insbesondere aus Blech ausgestanzt und weist dann die in Fig. 1 dargestellte Form auf. Es besitzt einen mittigen Zentralbereich 2, an dem Schaufeln 3 in etwa radialer Richtung angeformt sind. Innerhalb eines inneren Bereichs 6, der größer ist als der Zentralbereich 2, sind die zwischen den Schaufeln 3 verbliebenen restlichen Materialbereiche als Befestigungsteile 4 genutzt, wobei die Befestigungsteile 4 und die Schaufeln 3 bis auf die dazwischen liegenden gestanzten Schlitze 5 aneinander angrenzen.The impeller 1 of a pump or a blower is punched out of a one-piece, sheet material, in particular made of sheet metal and then has the in Fig. 1 illustrated form. It has a central central region 2, on which blades 3 are formed in an approximately radial direction. Within an inner region 6, which is larger than the central region 2, the remaining material areas remaining between the blades 3 are used as fastening parts 4, the fastening parts 4 and the blades 3 adjoining each other except for the stamped slots 5 located therebetween.

Jede Schaufel 3 weist einen äußeren breiteren Bereich 3a auf, der nach außen hin sich verjüngt und einen inneren Bereich 3b auf, der sich zur Laufradmitte hin verjüngt und einen schmalen Fußbereich 3c bildet, der in den Zentralbereich 2 übergeht. Die konkave Verjüngung 3d der Schaufel 3 umgibt eine entsprechend geformte konvexe Ausbauchung 4a des Befestigungsteils 4. Die Schaufeln 3 ragen somit mit ihrem äußeren Bereich 3a über den inneren Bereich 6 hinaus, während die Befestigungsteile 4 innerhalb des Bereichs 6 bleiben und mit ihren äußeren Enden an diesen angrenzen.Each blade 3 has an outer wider portion 3a which tapers outwardly and an inner portion 3b which tapers towards the center of the rotor and forms a narrow foot portion 3c which merges into the central portion 2. The concave taper 3d of the blade 3 surrounds a correspondingly shaped convex bulge 4a of the fastening part 4. The blades 3 thus protrude with their outer region 3a beyond the inner region 6, while the fastening parts 4 remain within the region 6 and with their outer ends adjoin this.

Die Schaufeln 3 sind jeweils um einen Laufradradius zur Vorderseite des Laufrades hin gebogen, wobei bei diesem Biegen nur der Fußbereich 3c verwunden wird. Die Schaufeln werden somit um eine Achse A gedreht, die einem Radius des Laufradius entspricht. Stattdessen kann aber auch die Drehachse A parallel zu einem Radius des Laufrades sein oder in einem spitzen Winkel zum Radius stehen. In jedem dieser Fälle ist aber das Gesamte oder ein Großteil der Schaufel 3 zur Vorderseite des Laufrades umgebogen. Diese Biegung kann 90 Grad betragen oder hiervon abweichen.The blades 3 are each bent by an impeller radius towards the front of the impeller, wherein in this bending only the foot region 3c is wound. The blades are thus rotated about an axis A, which corresponds to a radius of the running radius. Instead, however, the axis of rotation A may be parallel to a radius of the impeller or at an acute angle to the radius. In any of these cases, however, all or most of the blade 3 is bent over to the front of the impeller. This bend can be 90 degrees or deviate from it.

Die Befestigungsteile 4 werden um eine Tangente B des Zentralbereichs 2 nach hinten um mindestens 90 Grad umgebogen, um einen Befestigungsraum 7 zu bilden, in den die Pumpenwelle 8 einsteckbar ist. Die Befestigungsteile 4 umgeben damit rundum die Welle 8, wobei die Befestigungsteile 4 in ihrer Fläche entsprechend der Oberfläche der Pumpenwelle gewölbt sein können, so dass alle Befestigungsteile zusammen mit ihren Innenseiten gleichsam eine Buchse für die Welle 8 bilden und mit ihren Innenseiten an der Außenfläche der Welle 8 anliegen.The fastening parts 4 are bent around a tangent B of the central region 2 to the rear by at least 90 degrees to form a mounting space 7, in which the pump shaft 8 can be inserted. The fasteners 4 surrounded so all around the shaft 8, wherein the fasteners 4 may be curved in its surface corresponding to the surface of the pump shaft, so that all fasteners together with their inner sides as it forms a socket for the shaft 8 and with their inner sides on the outer surface of the Wave 8 abut.

Die Schaufeln 3 können in ihrer Fläche gekrümmt sein, um den hydraulischen Wirkungsgrad in einer Vorzugsrichtung zu erhöhen. Ferner können die Schaufeln gleiche oder ungleiche Strukturen aufweisen und die Anzahl der Schaufeln 3 entspricht den insbesondere hydraulischen Anforderungen an das Laufrad. Zum Bilden der Befestigungsteile 4 müssen nicht die gesamten zwischen den Schaufeln 3 befindlichen Materialbereiche benutzt werden. Hierzu reichen auch längliche Teilbereiche insbesondere in Stegform.The blades 3 may be curved in their surface in order to increase the hydraulic efficiency in a preferred direction. Furthermore, the blades may have the same or different structures and the number of blades 3 corresponds to the particular hydraulic requirements for the impeller. To form the fastening parts 4, not the entire material areas located between the blades 3 have to be used. Elongated subareas, in particular in web form, are also sufficient for this purpose.

Die Befestigungsteile 4 können der Nabe eine konische Form geben, so dass ein sicherer Halt gegenüber Verdrehungen und Verschiebungen des Laufrades auf der Welle gegeben ist. Als Material für das Laufradblech eignen sich Stühle, die eine ausreichende Steifigkeit aufweisen, über eine geeignete Federwirkung verfügen, um Verformungen zu verhindern und damit eine sichere Befestigung der Welle ermöglichen. Für Zikulationspumpen ist Edelstahl zu bevorzugen.The fasteners 4 can give the hub a conical shape, so that a secure hold against twists and displacements of the impeller is given on the shaft. As a material for the impeller sheet are chairs that have sufficient rigidity, have a suitable spring action to prevent deformation and thus allow secure attachment of the shaft. For ciculation pumps stainless steel is to be preferred.

Claims (17)

  1. Impeller of a pump or fan made from a single piece of material with a flat central region (2) at the outer edge of which the blades (3) are formed and bent round, characterized in that residual material regions located between the blades (3) are in part bent back to form attachment parts (4) for a pump or fan shaft (8), the attachment parts (4) being bent back sufficiently to bound an impeller hub space (7) within or on to which the pump or fan shaft (8) is attachable.
  2. Impeller according to Claim 1, characterized in that a weblike partial region of the material regions located between the blades (3) is bent back.
  3. Impeller according to Claim 1 or Claim 2, characterized in that the attachment parts (4) are bent back about a tangent (B) to the central region (2).
  4. Impeller according to any one of the preceding claims, characterized in that the attachment parts (4) occupy, in the unbent condition, a region of the flat material formed by a tapering (3d) of an adjacent blade (3).
  5. Impeller according to any one of the preceding claims, characterized in that the radial extent of the attachment parts (4) is one quarter to one sixth of the impeller diameter (D).
  6. Impeller according to any one of the preceding claims, characterized in that the attachment parts (4) are bent back through at least 90 degrees.
  7. Impeller according to any one of the preceding claims, characterized in that the faces of the attachment parts (4) are dished to conform to the surface of the pump or fan shaft (8).
  8. Impeller of a pump or fan made from a single piece of flat material consisting of sheet metal, with a flat central region (2) at the outer edge of which the blades (3) are formed and bent round, according to any one of the preceding claims, characterized in that the blades (3) are bent round by being turned about an axis (A) which substantially corresponds to the longitudinal orientation of the blades (3).
  9. Impeller according to Claim 8, characterized in that the blades (3) are turned about an axis which corresponds to a radius of the impeller (1) or is parallel with a radius of the impeller or stands at an acute angle to a radius of the impeller.
  10. Impeller according to any one of the preceding claims, characterized in that the blades (3) are bent round so that they jut towards the front of the impeller (1).
  11. Impeller according to any one of the preceding claims, characterized in that the radial extent of the blades (3) is at least one quarter, and preferably one third, of the impeller diameter (D).
  12. Impeller according to any one of the preceding claims, characterized in that the blades (3) taper to a narrow root region (3e) formed on a central region (2).
  13. Impeller according to Claim 12, characterized in that the blades (3) are bent round by twisting of the narrow root region (3e).
  14. Impeller according to any one of the preceding claims, characterized in that the blades (3), the regions (4) located between the blades, and the central region (2) are stamped out of a single piece of sheet metal.
  15. Impeller according to any one of the preceding claims, characterized in that the blades (3) and the attachment parts (4) at least in an inner region (6) adjoin each other on either side and are separated from each other only by cutting or stamping lines.
  16. Impeller according to any one of the preceding claims, characterized in that the blade face (3) is curved or dished over its length.
  17. Impeller according to any one of the preceding claims, characterized in that it consists of steel sheet.
EP08759127A 2007-06-11 2008-06-10 Impeller made of flat material Active EP2113054B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007027370A DE102007027370A1 (en) 2007-06-11 2007-06-11 Impeller made of flat material
PCT/EP2008/004599 WO2008151770A1 (en) 2007-06-11 2008-06-10 Impeller made of flat material

Publications (2)

Publication Number Publication Date
EP2113054A1 EP2113054A1 (en) 2009-11-04
EP2113054B1 true EP2113054B1 (en) 2011-04-06

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ID=39684544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759127A Active EP2113054B1 (en) 2007-06-11 2008-06-10 Impeller made of flat material

Country Status (4)

Country Link
EP (1) EP2113054B1 (en)
AT (1) ATE504745T1 (en)
DE (2) DE102007027370A1 (en)
WO (1) WO2008151770A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100022799A1 (en) * 2021-09-03 2023-03-03 Almes Srl FORCED VENTILATION DEVICE FOR A COOKING OVEN

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011112746A2 (en) * 2010-03-09 2011-09-15 Netbio, Inc. Unitary biochip providing sample-in to results-out processing and methods of manufacture
DE102010020574A1 (en) 2010-05-14 2011-11-17 Ksb Aktiengesellschaft Flowing device

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
GB440587A (en) * 1934-12-12 1936-01-02 Humber Ltd Fans
GB1062946A (en) * 1963-11-14 1967-03-22 Speedwell Res Ltd Improvements in or relating to centrifugal pumps
SU1267058A1 (en) * 1984-08-15 1986-10-30 Stavinskij Andrej A Method of manufacturing fan impeller
DD259975A3 (en) 1986-07-07 1988-09-14 Merbelsrod Geraete Pumpen Veb BLECHLAUFRAD SMALL FOERDERLEISTUNG, ESPECIALLY FOR COOLANT PUMPS
DE4008216A1 (en) * 1990-03-15 1991-09-19 Grundfos Int Mfg. radial blade ring impellers, etc. - forms comb-shaped blank from flat metal and bends tines to form blades
DE10052637B4 (en) * 2000-10-24 2021-03-11 Pfeiffer Vacuum Gmbh 02/16/2001 Discs for a turbo molecular pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100022799A1 (en) * 2021-09-03 2023-03-03 Almes Srl FORCED VENTILATION DEVICE FOR A COOKING OVEN

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Publication number Publication date
ATE504745T1 (en) 2011-04-15
WO2008151770A1 (en) 2008-12-18
DE102007027370A1 (en) 2008-12-18
EP2113054A1 (en) 2009-11-04
DE502008003090D1 (en) 2011-05-19

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