EP0797004B1 - Electric motor driven air pump - Google Patents

Electric motor driven air pump Download PDF

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Publication number
EP0797004B1
EP0797004B1 EP96118675A EP96118675A EP0797004B1 EP 0797004 B1 EP0797004 B1 EP 0797004B1 EP 96118675 A EP96118675 A EP 96118675A EP 96118675 A EP96118675 A EP 96118675A EP 0797004 B1 EP0797004 B1 EP 0797004B1
Authority
EP
European Patent Office
Prior art keywords
air pump
electric motor
pump
shaft
impeller
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
EP96118675A
Other languages
German (de)
French (fr)
Other versions
EP0797004A1 (en
Inventor
Rainer Peters
Michael Bonse
Günter van de Venne
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0797004A1 publication Critical patent/EP0797004A1/en
Application granted granted Critical
Publication of EP0797004B1 publication Critical patent/EP0797004B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/234—Laser welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to an electrically driven air pump, consisting of a Housing with pump unit arranged on one side and on the other side arranged electric motor, with pump and motor side of the housing through Lids are closed and the pump unit has pump impellers, the Impeller hubs bear against a shaft collar in the direction of arrangement, whereby mutually contacting axial surfaces of the impellers an interlocking toothing have, the pump impellers are injection molded from plastic and onto the Electric motor shaft are pressed, the impeller hubs by one on the Electric motor shaft pressed, made of metal end ring are secured, the contacting axial surfaces of the impeller and the end ring have interlocking teeth.
  • Such an electrically driven air pump is known from GB -A- 28866.
  • the bottom impeller is on a positive shaft-hub connection a drive shaft arranged, the other wheels only loosely on the Drive shaft are arranged and toothed with the first impeller are positively connected, such that the first impeller, the other impellers drives.
  • This air pump shows increased uneven running and vibration.
  • DE-A1 41 07 049.6 has already proposed that the electric motor by means of two elastic motor bearings between Electric motor and housing is supported. With the in this publication The proposed pump impeller is made up of several parts composite impeller, which must be balanced.
  • a pump version is known from US Pat. No. 2,857,849, for example several pump impellers are attached to an electric motor shaft, by means of one screwed into the pump impeller hub transversely to the longitudinal axis of the pump Screw that presses against the shaft. Given that the thread is for this purpose must be sufficiently strong, it can be concluded that the impellers are made of metal consist. These are heavy and have imbalances.
  • the invention has for its object an air pump with a reduced To create running noise, which is also a simplified Pump structure should be achieved.
  • Fig. 1 shows the air pump according to the invention, consisting of a plastic manufactured housing 1, which on the one hand accommodates a pump unit 2 and on the other hand in a Electric motor chamber 3 an electric motor 4.
  • the housing 1 is on the pump side of closed a cover 5, which has an intake port 6.
  • the pump unit 2 one or more Injection molded plastic pump impellers 7, 8, making a streamlined Shaping and a lighter dish compared to metal execution are accessible.
  • the Pump impellers 7, 8 are pressed onto an electric motor shaft 11 with impeller hubs 9, 10, the impeller hubs 9, 10 in the pressing direction against a shaft collar 12 apply and by a pressed onto the shaft 11, made of metal end ring 13 are secured. So that the relatively smooth plastic does not slide on the shaft 11 provided that contacting axial surfaces 14, 15 and 16 of the impellers 7, 8 and of the end ring 13 have an interlocking toothing 17.
  • the shaft collar 12 is supported by a shaft 11 pressed, metal stop ring 18 is formed.
  • the contacting axial surfaces 15, 19 of the Impeller 8 and the stop ring 18 have interlocking teeth 20, as shown in Fig. 2, whereby the impellers 7, 8 are made uniform can.
  • the toothing 17 shown in the drawing is carried out by one Hub extension 21, interrupted by a hub bore 22 and a hub groove 23, i. H. one end wall 15 of the pump impeller hub 9 then has the hub extension 21 and other end wall 16 on the hub groove 23.
  • the stop ring 18 then has a groove 24 and the end ring has a shoulder 25 which are designed in accordance with the hub groove 23 and the hub shoulder 21.
  • the end ring 13 can be connected to the shaft 11 by laser beam welding and thus secured against rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Reciprocating Pumps (AREA)

Description

Die Erfindung betrifft eine elektrisch angetriebene Luftpumpe, bestehend aus einem Gehäuse mit auf einer Seite angeordnetem Pumpenwerk und auf der anderen Seite angeordnetem Elektromotor, wobei Pumpen- und Motorseite des Gehäuses durch Deckel verschlossen sind und das Pumpenwerk Pumpenlaufräder aufweist, wobei die Laufradnaben in Anordnungsrichtung gegen einen Wellenbund anliegen, wobei einander berührende Axialflächen der Laufräder eine ineinander greifende Verzahnung aufweisen, wobei die Pumpenlaufräder aus Kunststoff gespritzt sind und auf die Elektromotorwelle aufgepreßt sind, wobei die Laufradnaben durch einen auf die Elektromotorwelle gepreßten, aus Metall bestehenden Abschlußring gesichert sind, wobei die einander berührenden Axialflächen des Laufrades und des Abschlußringes eine ineinander greifende Verzahnung aufweisen.The invention relates to an electrically driven air pump, consisting of a Housing with pump unit arranged on one side and on the other side arranged electric motor, with pump and motor side of the housing through Lids are closed and the pump unit has pump impellers, the Impeller hubs bear against a shaft collar in the direction of arrangement, whereby mutually contacting axial surfaces of the impellers an interlocking toothing have, the pump impellers are injection molded from plastic and onto the Electric motor shaft are pressed, the impeller hubs by one on the Electric motor shaft pressed, made of metal end ring are secured, the contacting axial surfaces of the impeller and the end ring have interlocking teeth.

Eine derartig elektrisch angetriebene Luftpumpe ist aus der GB -A- 28866 bekannt. Dabei ist das unterste Laufrad über eine formschlüssige Wellen-Naben-Verbindung auf einer Antriebswelle angeordnet, wobei die weiteren Laufräder nur lose auf der Antriebswelle angeordnet sind und über Verzahnungen mit dem ersten Laufrad formschlüssig verbunden sind, derart, daß das erste Laufrad die weiteren Laufräder antreibt. Diese Luftpumpe weist eine erhöhte Laufunruhe und Vibration auf.Such an electrically driven air pump is known from GB -A- 28866. The bottom impeller is on a positive shaft-hub connection a drive shaft arranged, the other wheels only loosely on the Drive shaft are arranged and toothed with the first impeller are positively connected, such that the first impeller, the other impellers drives. This air pump shows increased uneven running and vibration.

Bei einer Pumpe gemäß EP-A2- 385 298 besteht das Problem, daß ihr Betrieb aufgrund von Unwuchten des Laufrades und des Elektromotors sowie des entstehenden magnetischen Drehfeldes unvermeidbar mit mehr oder weniger Vibrationen verbunden ist, die sich auf die Einrichtung, an der die Pumpe angeschlossen ist bzw. an der sie befestigt ist, übertragen und ein hochfrequentes Laufgeräusch verursachen. With a pump according to EP-A2- 385 298 there is the problem that its operation due to imbalance of the impeller and the electric motor as well as the resulting magnetic rotating field inevitable with more or less vibrations connected to the device to which the pump is connected or to which it is attached, transmit and cause high-frequency running noise.

Zur Verminderung dieses Geräusches wurde in der DE-A1 41 07 049.6 bereits vorgeschlagen, daß der Elektromotor mittels zweier elastischer Motorlager zwischen Elektromotor und Gehäuse abgestützt ist. Bei dem in dieser Druckschrift vorgeschlagenen Pumpenlaufrad handelt es sich um ein aus mehreren Teilen zusammengesetztes Laufrad, welches ausgewuchtet werden muß.To reduce this noise, DE-A1 41 07 049.6 has already proposed that the electric motor by means of two elastic motor bearings between Electric motor and housing is supported. With the in this publication The proposed pump impeller is made up of several parts composite impeller, which must be balanced.

Aus der US-PS 2,857,849 beispielsweise ist eine Pumpenausführung bekannt, bei der mehrere Pumpenlaufräder auf einer Elektromotorwelle befestigt sind, und zwar mittels einer quer zur Pumpenlängsachse in die Pumpenlaufradnabe eingeschraubten Schraube, die gegen die Welle drückt. Daraus, daß das Gewinde für diesen Zweck ausreichend fest sein muß, kann geschlossen werden, daß die Laufräder aus Metall bestehen. Diese sind schwer und weisen Unwuchten auf.A pump version is known from US Pat. No. 2,857,849, for example several pump impellers are attached to an electric motor shaft, by means of one screwed into the pump impeller hub transversely to the longitudinal axis of the pump Screw that presses against the shaft. Given that the thread is for this purpose must be sufficiently strong, it can be concluded that the impellers are made of metal consist. These are heavy and have imbalances.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Luftpumpe mit verringertem Laufgeräusch zu schaffen, wobei darüber hinaus ein vereinfachter Pumpenaufbau erreicht werden soll. Proceeding from this, the invention has for its object an air pump with a reduced To create running noise, which is also a simplified Pump structure should be achieved.

Diese Aufgabe ist bei der angegebenen Luftpumpe durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelöst worden. Vorteilhafte Weiterbildungen sind mit den Unteransprüchen angegeben.This task is in the specified air pump by the in the characterizing part of the claim 1 specified features have been resolved. Advantageous further developments are included specified in the subclaims.

Mit der Erfindung erzielbare Vorteile sind in der nachfolgenden Beschreibung eines Ausführungsbeispiels der Erfindung angegeben, das in der Zeichnung dargestellt ist.Advantages achievable with the invention are in the following description of a Embodiment of the invention specified, which is shown in the drawing.

Diese zeigt:

  • Fig. 1
    eine Luftpumpe
  • Fig. 2
    eine Einzelheit aus Fig. 1 in einer alternativen Ausbildung.
    • This shows:
  • Fig. 1
    an air pump
  • Fig. 2
    a detail of Fig. 1 in an alternative embodiment.

    • Fig. 1 zeigt die erfindungsgemäße Luftpumpe, bestehend aus einem in Kunststoff gefertigten Gehäuse 1, das einerseits ein Pumpenwerk 2 aufnimmt und andererseits in einer Elektromotorkammer 3 einen Elektromotor 4. Das Gehäuse 1 ist auf der Pumpenseite von einem Deckel 5 verschlossen, der einen Ansaugstutzen 6 aufweist.Fig. 1 shows the air pump according to the invention, consisting of a plastic manufactured housing 1, which on the one hand accommodates a pump unit 2 and on the other hand in a Electric motor chamber 3 an electric motor 4. The housing 1 is on the pump side of closed a cover 5, which has an intake port 6.

    Erfindungsgemäß ist nun vorgesehen, daß das Pumpenwerk 2 ein oder mehrere aus Kunststoff gespritzte Pumpenlaufräder 7, 8 aufweist, wodurch eine strömungsgünstige Formgebung und ein gegenüber Metallausführung leichteres Gericht erreichbar sind. Die Pumpenlaufräder 7, 8 sind mit Laufradnaben 9, 10 auf eine Elektromotorwelle 11 aufgepreßt, wobei die Laufradnaben 9, 10 in Aufpreßrichtung gegen einen Wellenbund 12 anliegen und durch einen auf die Welle 11 gepreßten, aus Metall bestehenden Abschlußring 13 gesichert sind. Damit der relativ glatte Kunststoff auf der Welle 11 nicht gleitet, ist vorgesehen, daß einander berührende Axialflächen 14, 15 und 16 der Laufräder 7, 8 und des Abschlußringes 13 eine ineinandergreifende Verzahnung 17 aufweisen.According to the invention it is now provided that the pump unit 2 one or more Injection molded plastic pump impellers 7, 8, making a streamlined Shaping and a lighter dish compared to metal execution are accessible. The Pump impellers 7, 8 are pressed onto an electric motor shaft 11 with impeller hubs 9, 10, the impeller hubs 9, 10 in the pressing direction against a shaft collar 12 apply and by a pressed onto the shaft 11, made of metal end ring 13 are secured. So that the relatively smooth plastic does not slide on the shaft 11 provided that contacting axial surfaces 14, 15 and 16 of the impellers 7, 8 and of the end ring 13 have an interlocking toothing 17.

    Vorteilhafterweise ist vorgesehen, daß der Wellenbund 12 durch einen auf die Welle 11 gepreßten, aus Metall bestehenden Anschlagring 18 gebildet ist. Auch hier kann die Maßnahme getroffen werden, daß die einander berührenden Axialfächen 15, 19 des Laufrades 8 und des Anschlagringes 18 eine ineinandergreifende Verzahnung 20 aufweisen, wie in Fig. 2 dargestellt ist, wodurch die Laufräder 7, 8 einheitlich ausgeführt werden können. Die in der Zeichnung dargestellte Verzahnung17 erfolgt durch jeweils einen Nabenansatz 21, unterbrochen durch eine Nabenbohrung 22 und eine Nabennut 23, d. h. die eine Stirnwand 15 der Pumpenlaufradnabe 9 weist dann den Nabenansatz 21 und die andere Stirnwand 16 die Nabenut 23 auf.It is advantageously provided that the shaft collar 12 is supported by a shaft 11 pressed, metal stop ring 18 is formed. Here, too Measure are taken that the contacting axial surfaces 15, 19 of the Impeller 8 and the stop ring 18 have interlocking teeth 20, as shown in Fig. 2, whereby the impellers 7, 8 are made uniform can. The toothing 17 shown in the drawing is carried out by one Hub extension 21, interrupted by a hub bore 22 and a hub groove 23, i. H. one end wall 15 of the pump impeller hub 9 then has the hub extension 21 and other end wall 16 on the hub groove 23.

    Entsprechend dieser Ausführung weist dann der Anschlagring 18 eine Nut 24 und der Abschlußring einen Ansatz 25 auf, die entsprechend der Nabennut 23 und des Nabenansatzes 21 ausgeführt sind.
    Nach der Montage oder Teilmontage der Luftpumpe kann der Abschlußring 13 durch Laserstrahlverschweißung mit der Welle 11 verbunden und damit gegen Verdrehen gesichert sein.    According to this embodiment, the stop ring 18 then has a groove 24 and the end ring has a shoulder 25 which are designed in accordance with the hub groove 23 and the hub shoulder 21.
    After assembly or partial assembly of the air pump, the end ring 13 can be connected to the shaft 11 by laser beam welding and thus secured against rotation.

    Mit der erfindungsgemäßen Luftpumpe ist ein geräuscharmer Betrieb möglich geworden, da nun leichtere Pumpenlaufräder verwendet werden können. Darüber hinaus liegt mit der Erfindung eine sehr einfach aufgebaute Luftpumpe vor, die kostengünstig herstellbar ist und eine lange Lebensdauer haben wird.With the air pump according to the invention, low-noise operation has become possible because lighter pump impellers can now be used. Furthermore lies with the Invention a very simple air pump, which is inexpensive to manufacture and will have a long lifespan.

    Claims (5)

    1. Electrically driven air pump consisting of a casing with a pump mechanism disposed on one side and an electric motor disposed on the other side, wherein the pump side and motor side of the casing are closed by covers and the pump mechanism has pump impellers, wherein the impeller hubs rest against a shaft collar in the direction in which they are installed, wherein axial faces of the impellers that are in contact with one another have toothing systems which engage in one another, characterised in that the pump impellers (7, 8) are injection-moulded from plastic and forced onto the shaft (11) of the electric motor, wherein the impeller hubs (9, 10) are secured by an end ring (13) which is forced onto the shaft (11) of the electric motor and consists of metal, and wherein those axial faces (14, 16) of the impeller (7) and end ring (13) which are in contact with one another have toothing systems (17) which engage in one another.
    2. Air pump according to claim 1, characterised in that the shaft collar (12) is formed by a stop ring (18) which is forced onto the shaft (11) and consists of metal.
    3. Air pump according to claim 1, characterised in that those axial faces (15 and 19) of the impeller (8) and stop ring (18) which are in contact with one another have toothing systems (20) which engage in one another.
    4. Air pump according to one of claims 2 or 3, characterised in that the toothing system (17, 20) is brought about by a hub projection (21, 25) and a hub groove (23, 24).
    5. Air pump according to one of the preceding claims, characterised in that the end ring (13) is secured by laser-beam welding after the impellers (7, 8) have been fitted.
    EP96118675A 1996-03-23 1996-11-21 Electric motor driven air pump Expired - Lifetime EP0797004B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19611512 1996-03-23
    DE19611512A DE19611512A1 (en) 1996-03-23 1996-03-23 Electrically powered air pump

    Publications (2)

    Publication Number Publication Date
    EP0797004A1 EP0797004A1 (en) 1997-09-24
    EP0797004B1 true EP0797004B1 (en) 2002-08-28

    Family

    ID=7789192

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96118675A Expired - Lifetime EP0797004B1 (en) 1996-03-23 1996-11-21 Electric motor driven air pump

    Country Status (4)

    Country Link
    US (1) US5797727A (en)
    EP (1) EP0797004B1 (en)
    DE (2) DE19611512A1 (en)
    ES (1) ES2177709T3 (en)

    Families Citing this family (14)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19743069A1 (en) * 1997-09-30 1999-04-01 Pierburg Ag Electrically powered air pump
    JPH11303961A (en) * 1998-04-17 1999-11-02 Nippon Seiko Kk Toroidal-type continuously variable transmission
    DE19943816A1 (en) 1999-09-14 2001-03-15 Pierburg Ag Electrically powered air pump
    US6296459B1 (en) * 2000-02-15 2001-10-02 Intex Recreation Corp. Electric air pump having multiple impellers and method
    DE20016769U1 (en) * 2000-09-28 2000-12-14 Papst Motoren Gmbh & Co Kg Radial blowers, especially for ventilators
    US6890159B2 (en) * 2002-03-19 2005-05-10 Denso Corporation Air blower with fan unable to contact motor housing
    US6663343B1 (en) 2002-06-27 2003-12-16 Sea Solar Power Inc Impeller mounting system and method
    US8025346B2 (en) 2006-12-15 2011-09-27 Caterpillar Inc. Machine component configuration for enhanced press fit and press fit coupling method
    EP2273123B9 (en) 2009-07-08 2018-03-21 Pierburg Pump Technology GmbH Axial bearing for a pump wheel
    CA3035508A1 (en) * 2011-07-13 2013-01-17 Fisher & Paykel Healthcare Limited Impeller and motor assembly
    US10137264B2 (en) 2011-07-13 2018-11-27 Fisher & Paykel Healthcare Limited Respiratory assistance apparatus
    WO2014097030A1 (en) 2012-12-18 2014-06-26 Fisher & Paykel Healthcare Limited Impeller and motor assembly
    DE102014014287A1 (en) * 2014-09-24 2016-03-24 Ziehl-Abegg Se fan
    US11401974B2 (en) 2017-04-23 2022-08-02 Fisher & Paykel Healthcare Limited Breathing assistance apparatus

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US1173289A (en) * 1916-02-29 American Manganese Steel Co Mill-pinion.
    GB190928866A (en) * 1909-12-10 1910-11-03 Edmund Allday Improvements in Multiple Centrifugal Fans.
    US1251836A (en) * 1914-05-02 1918-01-01 Albert Stufflebeam Shaft-coupling.
    US2857849A (en) 1953-11-13 1958-10-28 Joseph R Smylie Motor driven pumping units
    US2990895A (en) * 1958-10-20 1961-07-04 Madden T Works Turbodrill
    US3084852A (en) * 1961-03-29 1963-04-09 Gen Electric Fan blade hub connector
    JPH0765597B2 (en) 1989-03-01 1995-07-19 株式会社日立製作所 Electric blower
    SE464318B (en) * 1990-02-28 1991-04-08 Flygt Ab SHAFT CONSTRUCTION FOR A PUMP WHEEL ROTARY RUBBER
    KR930000876B1 (en) 1990-03-09 1993-02-08 금성일렉트론 주식회사 HIGH ENERGY ION BEAM BLOCKING METHOD USING Si3N4 FILM
    DE4107049C2 (en) * 1991-03-06 1997-12-11 Pierburg Ag Electrically powered air pump
    US5269572A (en) * 1992-08-28 1993-12-14 Gold Star Manufacturing, Inc. Apparatus and method for coupling elongated members
    DE59301728D1 (en) * 1992-12-22 1996-04-04 Siemens Ag Blower unit consisting of a drive motor and a blower
    FR2703111B1 (en) * 1993-03-25 1995-06-30 Ozen Sa ROTOR FOR PUMP COMPRISING TWO WELDED ASSEMBLIES, OBTAINED BY INJECTION MOLDING OF THERMOPLASTIC MATERIALS, AND METHOD FOR MANUFACTURING SUCH A ROTOR.

    Also Published As

    Publication number Publication date
    DE59609589D1 (en) 2002-10-02
    US5797727A (en) 1998-08-25
    EP0797004A1 (en) 1997-09-24
    ES2177709T3 (en) 2002-12-16
    DE19611512A1 (en) 1997-09-25

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