DE102007010729B3 - Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening - Google Patents
Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening Download PDFInfo
- Publication number
- DE102007010729B3 DE102007010729B3 DE102007010729A DE102007010729A DE102007010729B3 DE 102007010729 B3 DE102007010729 B3 DE 102007010729B3 DE 102007010729 A DE102007010729 A DE 102007010729A DE 102007010729 A DE102007010729 A DE 102007010729A DE 102007010729 B3 DE102007010729 B3 DE 102007010729B3
- Authority
- DE
- Germany
- Prior art keywords
- vacuum pump
- sealing body
- pump according
- opening
- air outlet
- 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.)
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Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Die Erfindung betrifft eine Vakuumpumpe mit einem topfförmigen Gehäuse, einem exzentrisch im Gehäuse drehbar gelagerten Rotor, einem im Rotor orthogonal zur Drehachse verschieblich gelagerten Flügel, der mit seinen Flügelspitzen an einer einen Arbeitsraum begrenzenden Innenumfangsfläche des Gehäuses anliegt und dabei den Arbeitsraum in einen Saugraum und einen Druckraum unterteilt, und der Saugraum mit einer Lufteinlassöffnung und der Druckraum mit einer Luftauslassöffnung versehen sind, wobei die Luftauslassöffnung mit einem Auslassventil versehen ist, und das Auslassventil einen direkt auf der Luftauslassöffnung aufliegenden Dichtkörper aufweist.The The invention relates to a vacuum pump with a cup-shaped housing, a eccentric in the housing rotatably mounted rotor, one in the rotor orthogonal to the axis of rotation slidably mounted wings, the one with his wing tips abuts a working space limiting inner peripheral surface of the housing and doing the work space in a suction chamber and a pressure chamber divided, and the suction chamber with an air inlet and the pressure chamber are provided with an air outlet opening, wherein the air outlet opening is provided with an exhaust valve, and the exhaust valve directly on the air outlet resting sealing body having.
Vakuumpumpen
mit einem derartigen Aufbau sind zum Beispiel aus der
An
der Auslassöffnung
ist ein Auslassventil vorgesehen, welches nach Art einer Blattfeder
ausgebildet ist. Diese Blattfeder drückt von außen auf die Luftauslassöffnung und
verschließt
diese. Die Blattfeder kann über
den im Druckraum herrschenden Überdruck
nach außen
aufgebogen werden. Dadurch wird die komprimierte Luft aus dem Druckraum in
die Druckleitung ausgestoßen.
Eine derartige Vorrichtung ist zum Beispiel aus der
Aus
der
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vakuumpumpe bereitzustellen, bei welcher sichergestellt ist, dass die im Druckraum komprimierte Luft vollständig in die Druckleitung ausgestoßen und nicht in den hinter dem Flügel sich befindenden Druckraum übergeleitet wird.Of the The invention is therefore based on the object to provide a vacuum pump, in which it is ensured that the compressed in the pressure chamber Air completely ejected into the pressure line and not in the back of the wing located pressure chamber overflowed becomes.
Diese Aufgabe wird mit einer Vakuumpumpe der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Dichtkörper elastisch ausgebildet ist, am in Drehrichtung des Rotors vorderen und hinteren Ende der Luftauslassöffnung an dieser befestigt ist und permanent an dieser anliegt.These The object is achieved by a vacuum pump of the type mentioned in the present invention solved, that the sealing body is formed elastically, in the direction of rotation of the rotor front and rear end of the air outlet attached to this and is permanently applied to this.
Bei der erfindungsgemäßen Vakuumpumpe ist der elastische Dichtkörper nicht wie beim Stand der Technik nur einseitig und deshalb frei auskragend eingespannt, sondern ist in Drehrichtung des Rotors gesehen sowohl am vordern Ende als auch am hinteren Ende der Luftauslassöffnung am Gehäuse fixiert. Diese Art der Befestigung hat den wesentlichen Vorteil, dass beim Abblasen das Ventil nicht vollständig aufschwenkt sondern lediglich den Bereich frei gibt, der zum Passieren des durchströmenden Volumens erforderlich ist. Daher kann keine Luft in den nachfolgenden, d.h. hinter dem Flügel liegenden Druckraum einströmen. Dies bedeutet, dass die im Druckraum komprimierte Luft die Dichtfläche in diesem Abschnitt aufdrückt, in welchem der Überdruck herrscht. Hat der Flügel einen Teil der Luftauslassöffnung und somit auch einen Teil des Auslassventils überfahren, dann herrscht lediglich noch vor dem Flügel ein Überdruck, der ein Abheben des Dichtkörpers von der Öffnung bewirkt. Hinter dem Flügel wird der Dichtkörper jedoch nicht von der Öffnung angehoben, da hierfür der Überdruck nicht ausreicht. Der Dichtkörper ist so ausreichend elastisch, dass er nicht über die gesamte Länge der Luftauslassöffnung abhebt, sondern lediglich in dem Abschnitt, in welchem ein ausreichend großer Überdruck herrscht. Dieser befindet sich aber stets in Drehrichtung des Rotors vor dem Flügel. Im Gegensatz hierzu hebt ein aus Federstahl bestehendes Dichtelement aufgrund der hohen Steifigkeit des Federstahls stets über die gesamte Länge vom Dichtsitz ab und nicht abschnittsweise.at the vacuum pump according to the invention the elastic sealing body not as in the prior art only one-sided and therefore free cantilevered but seen in the direction of rotation of the rotor both at the front end and the rear end of the air outlet opening at casing fixed. This type of attachment has the significant advantage that when blowing off the valve does not fully swing open but only clears the area required to pass through the flowing volume is. Therefore, no air in the subsequent, i. behind the wing flow in the pressure chamber. This means that the compressed air in the pressure chamber, the sealing surface in this Section imprints in which the overpressure prevails. Has the wing a part of the air outlet opening and thus also drive over a part of the exhaust valve, then there is only still in front of the wing an overpressure, the lifting of the sealing body from the opening causes. Behind the wing However, the sealing body is not from the opening raised, as this is the overpressure not enough. The sealing body is so sufficiently elastic that he does not have the full length of the air outlet but only in the section in which a sufficiently large overpressure prevails. However, this is always in the direction of rotation of the rotor in front of the wing. In contrast, lifts a existing spring steel sealing element due to the high rigidity of the spring steel always over the whole length from the sealing seat and not in sections.
Erfindungsgemäß ist der Dichtkörper gummielastisch. Hierdurch wird ein optimales Aneinanderschmiegen und Abdichten von Dichtkörper an der Dichtfläche erreicht. Außerdem wird das oben beschriebene Öffnen dadurch ermöglicht, indem das Material des Dichtkörpers dehnbar ist.According to the invention sealing body elastic. This is an optimal nestling and sealing of sealing bodies at the sealing surface reached. Furthermore will open as described above thereby enabling by the material of the sealing body is stretchable.
Um sich optimal an die Form der Auslassöffnung anzupassen, ist das erfindungsgemäße Auslassventil ebenso wie die aus dem Stand der Technik bekannte Blattfeder in Umfangsrichtung gebogen und besitzt insbesondere eine C- oder nierenförmige Gestalt.To optimally adapt to the shape of the Auslassöff Adjustment tion, the exhaust valve according to the invention as well as the known from the prior art leaf spring is bent in the circumferential direction and in particular has a C- or kidney-shaped.
Vorteilhaft liegt der Dichtkörper an der vom Druckraum abgewandten Seite der Luftauslassöffnung an. Dadurch wird das Auslassventil und insbesondere der Dichtkörper leicht zugänglich für Reparatur- und Wartungsarbeiten.Advantageous lies the sealing body on the side facing away from the pressure chamber side of the air outlet opening. As a result, the outlet valve and in particular the sealing body becomes light accessible for repair and maintenance.
Mit Vorzug weist das Auslassventil einen den Dichtkörper übergreifenden Stützkörper auf. Dieser Stützkörper dient nicht nur zur Befestigung und Fixierung des Dichtkörpers am Gehäuse sondern auch zur Einstellung des Öffnungszeitpunktes des Ventils, indem z.B. durch mehr oder weniger weites Übergreifen die Spannung des Dichtkörpers bestimmt wird.With Preferably, the outlet valve on a sealing body cross-supporting body. This support body is used not only for fixing and fixing the sealing body on casing but also to adjust the opening time of the valve, by e.g. by more or less spreading the tension of the sealing body is determined.
Erfindungsgemäß liegt der Stützkörper im Wesentlichen in den Bereichen am Dichtkörper an, in denen der Dichtkörper am Gehäuse anliegt. Dadurch bleibt der Dichtkörper im Bereich der Öffnung flexibel.According to the invention the support body substantially in the areas on the sealing body in which the sealing body on the housing is applied. As a result, the sealing body remains flexible in the region of the opening.
Vorteilhaft weist der Stützkörper im Bereich der Luftauslassöffnung einen Abstand zum Dichtkörper auf, bzw. ist der Stützkörper in diesem Bereich ausgespart. Der Dichtkörper bleibt dort beweglich und kann sich vom Gehäuse und insbesondere vom Rand der Öffnung abheben.Advantageous has the support body in Area of the air outlet opening a distance to the sealing body on, or is the support body in spared this area. The sealing body remains movable there and may be from the case and in particular from the edge of the opening take off.
Eine Variante sieht vor, dass der Dichtkörper zwischen dem Gehäuse und dem Stützkörper angeordnet, insbesondere fest eingespannt ist. Diese stellt eine einfache Möglichkeit der Befestigung dar.A Variant provides that the sealing body between the housing and arranged the support body, especially firmly clamped. This provides an easy way the attachment.
Eine andere Variante sieht vor, dass der Dichtkörper auf den Stützkörper aufvulkanisiert ist. Dadurch können Stützkörper und Dichtkörper gemeinsam gehandhabt, d.h. befestigt oder im Reparaturfall auch ausgetauscht werden.A Another variant provides that the sealing body vulcanized onto the support body is. Thereby can Supporting body and sealing body handled together, i. attached or in case of repair too be replaced.
Vorteilhaft ist der Stützkörper im Bereich der Luftauslassöffnung randoffen ausgespart. Bevorzugt ist der Dichtkörper an den Rand der Aussparungen anvulkanisiert. Hierdurch wird eine Variante mit einer sehr flachen Bauform geschaffen.Advantageous is the support body in Area of the air outlet opening recessed at the edge. Preferably, the sealing body is vulcanized to the edge of the recesses. This creates a variant with a very flat design.
Erfindungsgemäß sind der Stützkörper und der Dichtkörper als einteiliger Ventilkörper ausgebildet, so dass sie, wie bereits erwähnt, gemeinsam gehandhabt werden können.According to the invention Supporting body and the sealing body as a one-piece valve body trained so that they, as already mentioned, are handled together can.
Bei einer anderen Variante ist vorgesehen, dass der Ventilkörper im Bereich der Luftauslassöffnung zur Ausbildung des Dichtkörpers eine geringere Materialdicke aufweist als in den angrenzenden Bereichen. Dabei ist die Materialdicke derart gering, dass der Bereich elastisch verformbar ist. Diese Variante stellt eine einfache und preiswerte Lösung für das Ventil dar.at another variant, it is provided that the valve body in Area of the air outlet opening for the formation of the sealing body has a smaller material thickness than in the adjacent areas. The material thickness is so low that the area elastic is deformable. This variant represents a simple and inexpensive solution for the Valve dar.
Um nach dem Öffnen des Ventil ein sicheres Schließen zu garantieren und um zu Vermeiden, dass sich der Dichtkörper beim Öffnen des Ventils, d.h. bim Abheben vom Rand der Öffnung, umstülpt, öffnet das Auslassventil radial nach innen.Around After opening the valve a safe closing to guarantee and to avoid that the sealing body when opening the Valve, i. bim lifting off the edge of the opening, inverted, that opens Outlet valve radially inwards.
Bei der erfindungsgemäßen Vakuumpumpe besteht der Dichtkörper aus Kunststoff, insbesondere einem Thermoplast oder Elastomer.at the vacuum pump according to the invention consists the sealing body made of plastic, in particular a thermoplastic or elastomer.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung zwei besonders bevorzugte Ausführungsbeispiele im Einzelnen beschrieben sind.Further Advantages, features and details of the invention will become apparent the dependent claims as well as the following description, with reference to FIG the drawing two particularly preferred embodiments described in detail are.
In der Zeichnung zeigen:In show the drawing:
In
der
In
der
Die
Der
Ventilkörper
Herrscht
im Druckraum
Die
Claims (15)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007010729A DE102007010729B3 (en) | 2007-01-04 | 2007-02-26 | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
EP07856378A EP2079932A1 (en) | 2007-01-04 | 2007-12-05 | Vacuum pump having an outlet valve |
PCT/EP2007/010543 WO2008080492A1 (en) | 2007-01-04 | 2007-12-05 | Vacuum pump having an outlet valve |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202007003155 | 2007-01-04 | ||
DE202007003155.6 | 2007-01-04 | ||
DE102007010729A DE102007010729B3 (en) | 2007-01-04 | 2007-02-26 | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007010729B3 true DE102007010729B3 (en) | 2008-04-24 |
Family
ID=39198654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007010729A Active DE102007010729B3 (en) | 2007-01-04 | 2007-02-26 | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2079932A1 (en) |
DE (1) | DE102007010729B3 (en) |
WO (1) | WO2008080492A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011018294A3 (en) * | 2009-08-12 | 2012-02-23 | Joma-Polytec Gmbh | Vacuum pump |
DE102013104375A1 (en) * | 2013-04-30 | 2014-10-30 | Hella Kgaa Hueck & Co. | vacuum pump |
EP3536959A4 (en) * | 2016-11-03 | 2019-09-18 | Taiho Kogyo Co., Ltd. | Vane pump |
EP3536960A4 (en) * | 2016-11-03 | 2019-09-18 | Taiho Kogyo Co., Ltd. | Vane pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3371457B1 (en) * | 2015-11-02 | 2020-12-30 | Pierburg Pump Technology GmbH | Car vacuumpump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004044431A2 (en) * | 2002-11-13 | 2004-05-27 | Luk Automobiltechnik Gmbh & Co. Kg | Vacuum pump |
DE4019854B4 (en) * | 1989-07-10 | 2004-09-16 | Saurer Gmbh & Co. Kg | Vane vacuum pump |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1667143A (en) * | 1927-07-11 | 1928-04-24 | Wayne Co | Discharge valve for ice-machine compressors |
JPS555428A (en) * | 1978-06-22 | 1980-01-16 | Nakamura Suikan:Kk | Water ring pump of side-air-port type |
DE8518157U1 (en) * | 1985-06-22 | 1986-10-16 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Vane vacuum pump |
JP2006528742A (en) * | 2003-07-23 | 2006-12-21 | ハーグレーブス テクノロジー コーポレーション | Stroke-controlled pump valve |
-
2007
- 2007-02-26 DE DE102007010729A patent/DE102007010729B3/en active Active
- 2007-12-05 EP EP07856378A patent/EP2079932A1/en not_active Withdrawn
- 2007-12-05 WO PCT/EP2007/010543 patent/WO2008080492A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4019854B4 (en) * | 1989-07-10 | 2004-09-16 | Saurer Gmbh & Co. Kg | Vane vacuum pump |
WO2004044431A2 (en) * | 2002-11-13 | 2004-05-27 | Luk Automobiltechnik Gmbh & Co. Kg | Vacuum pump |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011018294A3 (en) * | 2009-08-12 | 2012-02-23 | Joma-Polytec Gmbh | Vacuum pump |
US8794942B2 (en) | 2009-08-12 | 2014-08-05 | Joma-Polytec Gmbh | Vacuum pump with connection nipple for connection between a rotor shaft and a drive |
DE102013104375A1 (en) * | 2013-04-30 | 2014-10-30 | Hella Kgaa Hueck & Co. | vacuum pump |
EP3536959A4 (en) * | 2016-11-03 | 2019-09-18 | Taiho Kogyo Co., Ltd. | Vane pump |
EP3536960A4 (en) * | 2016-11-03 | 2019-09-18 | Taiho Kogyo Co., Ltd. | Vane pump |
US11306718B2 (en) | 2016-11-03 | 2022-04-19 | Taiho Kogyo Co., Ltd. | Vane pump |
US11346343B2 (en) | 2016-11-03 | 2022-05-31 | Taiho Kogyo Co., Ltd. | Vane pump including pressure relief groove |
Also Published As
Publication number | Publication date |
---|---|
EP2079932A1 (en) | 2009-07-22 |
WO2008080492A1 (en) | 2008-07-10 |
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Owner name: JOMA-POLYTEC GMBH, 72411 BODELSHAUSEN, DE |