EP0753666B1 - Zahnradpumpe - Google Patents
Zahnradpumpe Download PDFInfo
- Publication number
- EP0753666B1 EP0753666B1 EP96110702A EP96110702A EP0753666B1 EP 0753666 B1 EP0753666 B1 EP 0753666B1 EP 96110702 A EP96110702 A EP 96110702A EP 96110702 A EP96110702 A EP 96110702A EP 0753666 B1 EP0753666 B1 EP 0753666B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- space
- gear pump
- flange
- damping
- 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
Links
Images
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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
-
- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
Definitions
- the invention is based on a gear pump according to the closer in the preamble of claim 1 specified genus.
- DE 42 42 217 A1 also includes a gear pump two pairs of gears known, the gears in external engagement comb and with a noise reduction Combination of gears with different numbers of teeth is achieved.
- this gear pump they are Shafts journal of the gears in glasses-shaped bearing bodies stored, the entire engine of gear pairs and Bearing bodies in a suitable interior of a Pump housing is used, which on its end faces is closed by a lid and a flange.
- its pump housing as cheap Continuous casting can be produced, is a low-noise Operation only with different numbers of teeth on the Gear pairs sought; a damping room for The pressure pulsations are not suppressed here intended.
- the Pump housing has a damping space.
- the pump housing has a gear housing Interior that extends continuously between two end faces extends and the by at both ends Lid and flange is complete. In both faces are covered by the cover or the flange arched, pocket-shaped damping chambers incorporated with each other through an oblique hole are connected and on the high pressure side of the pump between their pressure connection and a connecting piece are switched.
- This pump housing is suitable due to its design only for use as a die-cast part.
- the gear pump according to the invention with the characteristic Features of claim 1 has the advantage that through the integration of the damping space in the pump housing a relatively quiet gear pump is achieved, because the pulsation damper reduces the sound radiation from the Gear pump effectively reduced.
- the gear pump is building relatively simple and compact.
- the Integration of the flow-through damping space in the gear pump additional component.
- the Gear pump with integrated damper inexpensive manufacture and also assemble easily, taking the pump housing can be produced as a continuous casting.
- FIG. 1 shows the first thing according to the invention
- Embodiment is a perspective view of a Gear pump with storage container exploded view of the components in simplified representation
- Figure 2 with the gear pump Container according to Figure 1 in the same representation from a another perspective
- Figure 3 shows a cross section through the Gear pump according to Figure 1 according to III-III in simplified Representation and on an enlarged scale
- Figure 4 a not Perspective view of a pump housing according to the invention second gear pump in a simplified representation.
- Gear pump 10 has a pump housing 11, which as Continuous casting profile is executed and opposite lying end faces 12, 13 is open. While the upper end face 12 is closed by a cover 14, the lower end face 13 is replaced by a flange 15 covered.
- the pump housing 11 is in the range cuboid housing part 16 an interior 17 is formed, in which the engine 18 of the gear pump 10 is arranged is.
- the interior 17 is here as one between the two End faces 12, 13 continuous recess 19 executed in which two gears 21, 22 in external engagement comb together.
- Each gear 21, 22 has two Shaft journals 23 and 24 with which the gear wheels 21 and 22 rotatable in glasses-shaped bearing bodies 25 and 26 are stored.
- Gears 21, 22 and bearing body 25, 26 are with its outer contour to the cross section of the recess 19 adapted and in a conventional manner in the interior 17th built-in.
- the downward shaft journal 24 des Gear 22 is extended with an extension 27 formed and thus penetrates one in the flange 15 arranged bore 28. This extension 27 is used to drive the gear machine 10 when operating as a pump.
- FIG. 1 in connection with FIG. 2 also shows, points the cuboid housing part 16 four continuous Anchor holes 29 in which not shown Tie rods can be used to cover 14 together with the Screw the pump housing 11 onto the flange 15.
- a continuously curved outer wall 31 which together with the Housing part 16 includes a damping space 32.
- the Damping chamber 32 has a somewhat crescent-shaped cross section Form and forms a between the two end faces 12, 13th extending, continuous recess 33, the runs axially parallel to the interior 17 and over their whole Length has a constant cross-section.
- the simplified Longitudinal section through the gear pump 10 according to III-III represents, in this way, the damping space 32 of the Interior 17 through a first and a second inner wall 34 or 35 separately, wherein in the first inner wall 34 of Pressure port 36 of the gear pump 10 is.
- the suction port 37 of the gear pump 10 with a suction opening 38 in connection which in a Long side 39 of the rectangular housing part 16 is located.
- the outer wall 31 of the pump housing 11 is in shape on the Adjusted container 41, the cup-shaped part 42nd is put over the gear pump 10 and with his free edge 43 is tightly and firmly attached to the flange 15.
- the container 41 thus forms a tank space 44, from which the gear pump 10 pressure medium via the Suction opening 38 can suck.
- This tank space 44 stands via a first opening 45 in the flange 15 and a Suction channel 46 with a first connecting piece 47 in Connection which is formed radially on the flange 15 and for the supply of pressure medium in the tank space 44 is used.
- the flange 15 is parallel a second connecting piece 48 to the first connecting piece 47 formed for the pressure side, from which a pressure channel 49 to a pressure opening 51 in the flange 15 leads.
- this is Pressure opening 51 inside the assembled pump housing 11 of the cross section of the damping space 32, namely on the latter one end so that the pressure medium connection from Pressure connection 36 to this pressure opening 51 one if possible long way.
- Pressure relief valve 52 is installed, which the pressure in Damping space 32 limited. Furthermore, in addition to the Pressure relief valve 52 still a suction valve 53 on Lid 14 arranged. One from the cup-shaped part 42 protruding tubular neck 54 of the container 41 is in not shown in detail by a stopper locked.
- Drive shaft serving extension 27 from one not closer shown electric motor driven.
- From one another meshing gears 21, 22 is pressure medium from the Tank space 44 via suction opening 38 to suction connection 37 sucked in.
- the pressure medium is through the gears 21, 22nd compresses and flows through the pressure port 36 in the Damping chamber 32, which is almost its full length flows through to the pressure opening 51 on the flange 15 reach. From there, the pressure medium flows over the Pressure channel 49 to the second connection piece 48, from where it is a hydraulic consumer, not shown reached.
- About a likewise not shown Return line is the pressure medium from the consumer to first connecting piece 47 is returned, from which it the suction channel 46 and the first opening 45 in the flange 15, in can flow back the tank space 44.
- the relatively big one Volume of the damping space 32 and the relatively long Path of the pressure medium flow through this damping space 32 leads to that caused by the gears 21, 22 Pressure pulsations can be reduced considerably and thus noise is also significantly reduced.
- the damping chamber 32 of the Flow of pressure medium is flowing through and immediately the pressure medium connection 36 connects, as a result particularly effective pulsation damping through a large Damping volume and a long damping path achieved becomes.
- the pump housing 11 builds despite the integrated Damper chamber 32 is relatively compact and can be done in simple Manufacture way as a continuous casting, since the interior 17 and the damping space 32 as continuous recesses between the end faces 12 and 13 with a constant cross section are trained.
- the assembly of the pump housing 11 is relatively simple, although when it is grown on Flange 15 automatically connects the pressure chamber 32 to second, pressure-side connecting piece 48 on the Pressure opening 51 is made in the flange 15.
- the compact Construction of the pump housing 11 leads to reduced Installation space of the gear pump 10 and at the same time one Material savings. Since the damper in the gear pump 10 integrated, there is no additional component like this previously with a gear pump with an external pulsation damper was common.
- FIG. 4 shows another pump housing 60 from one second embodiment of a gear pump in perspective, simplified representation, which differs from the pump housing 11 according to FIG. 1 primarily as a result distinguishes that it is designed as a die-cast part.
- the pump housing 60 as a die-cast part is not the subject of the present invention and serves only for the purpose of explanation, since such a pump housing according to the invention is also executable as a continuous casting, with the intermediate wall little additional effort is used subsequently. in the the rest are used to explain the pump housing 60 same components as on the pump housing 11 also the same Reference numerals used.
- the pump housing 60 has for receiving the engine 18 one between its two faces 12 and 13 continuous interior 17, which is in an inner Housing part 61 extends in the axial direction.
- the inner Housing part 61 is of a substantially oval extending inner wall 62 formed, the inner arch 63 in two longitudinal walls 64 and 65 merges, the first of which Longitudinal wall 64 has the pressure port 36, while in the second longitudinal wall 65 of the suction connection 37 is formed, which here via the cover 14 to the tank space 44 connection Has.
- the inner housing part 61 is in the pump housing 60 from a semicircular or U-shaped damping space 66 - seen in cross section - surrounded by the outside an approximately circular outer wall 67 of the Pump housing 60 is limited. In the outer wall 67 are three anchor holes 29 integrated.
- This damping space 66 is in the pump housing 60 through a transverse to the longitudinal axis extending partition 68 divided so that a Chamber 69 on the cover side and a chamber 71 on the flange side arises.
- the overhead chamber 69 which by a The lid is closed and has one end in the area 72 connection to the pressure port 36 while on the other End 73 of the damping chamber 66 a passage 74 in the Partition 68, the two chambers 69 and 71 with each other connects.
- the underlying chamber 71 which by a Flange is closed, stands in the area of one End 72 of the damping chamber 66 with the pressure opening 51 in Flange in connection.
- the pump housing 60 which is designed using die casting technology thus becomes the inner housing part receiving the engine 61 on three sides (longitudinal walls 64, 65, inner arch 63) of the Damping space 66 surround so that an effective Pulsation damping and thus noise damping can be achieved.
- the way of the pressure medium flow from the pressure connection 36 through the Lid-side chamber 69 through the passage 74 to flange-side chamber 71 and further to the pressure opening 51 in Flange is designed to be effective for as long as possible To achieve sound absorption.
- Figure 4 is the course simplified this way for the pressure medium flow Arrows 75 shown.
Description
Claims (12)
- Zahnradpumpe (10) mit einem in einem Pumpengehäuse (11; 60) angeordneten Zahnradpaar (21, 22), dessen Zahnräder im Außeneingriff miteinander kämmen und in einem axial verlaufenden Innenraum (17) des Pumpengehäuses (11; 60) angeordnet sind, zwischen dessen beiden Stirnseiten (12, 13) der Innenraum (17) durchgehend verläuft und welche Stirnseiten durch einen Deckel (14) und einen Flansch (15) abgeschlossen sind, wobei der Antrieb für eine Zahnradwelle durch den Flansch (15) hindurchgeführt ist, und mit einem zur Unterdrückung von Druckpulsationen dienenden Dämpfungsraum (32; 66) der mit der Hochdruckseite (36) in Wirkverbindung steht, dadurch gekennzeichnet, daß der Dämpfungsraum (32; 66) in das Pumpengehäuse (11; 60) integriert ist und zwischen einen den Innenraum (17) mit dem Dämpfungsraum (32; 66) verbindenden Druckanschluß (36) und einen zu einem Anschlußstutzen (48) führenden Druckkanal (49) geschaltet ist und daß das den Dämpfungsraum (32; 66) aufnehmende Pumpengehäuse (11; 60) als Stranggußteil ausgebildet ist.
- Zahnradpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Druckmittelstrom zwischen dem Druckanschluß (36) und einer an die Stirnseite (13) des Pumpengehäuses (11; 60) grenzenden Drucköffnung (51) eines Druckkanals (49) durch den Dämpfungsraum (32; 66) hindurchgeführt ist.
- Zahnradpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Druckanschluß (36) einerseits und andererseits die Drucköffnung (51) des Druckkanals (49) im Flansch (15) im Querschnitt durch das Pumpengehäuse (11; 60) gesehen an entgegengesetzten Enden der durch den Dämpfungsraum (32; 66) führenden Druckmittelverbindung liegen.
- Zahnradpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Pumpengehäuse (11; 60) eine den Innenraum (17) von dem Dämpfungsraum (32; 66) trennende, axial verlaufende Innenwand (34, 35; 63 bis 65) aufweist, in welcher der Druckanschluß (36) liegt, und eine den Dämpfungsraum (32; 66) nach außen hin begrenzende Außenwand (31; 67) hat, wobei der Dämpfungsraum (32; 66) die Innenwand im Querschnitt gesehen an wenigstens zwei seiner vier Seiten umschließt.
- Zahnradpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Dämpfungsraum (32) als Ausnehmung (33) ausgebildet ist, die sich axial zwischen den beiden Stirnseiten (12, 13) des Pumpengehäuses (11) erstreckt, einen im wesentlichen gleichbleibenden Querschnitt aufweist und mindestens nahezu parallel zum Innenraum (17) verläuft.
- Zahnradpumpe nach Anspruch 5, dadurch gekennzeichnet, daß der Dämpfungsraum (32) im Querschnitt gesehen im wesentlichen eine sichelförmige Form aufweist, wodurch er das das Zahnradpaar (21, 22) aufnehmende Gehäuseteil (16) im wesentlichen an zwei (34, 35) seiner vier Seiten umschließt.
- Zahnradpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Dämpfungsraum (66) im Querschnitt durch das Pumpengehäuse (60) gesehen im wesentlichen halbkreisförmig um das das Triebwerk (18) aufnehmende, innere Gehäuseteil (61) angeordnet ist und dieses an mindestens drei (63 bis 65) von vier Seiten wenigstens teilweise umschließt, daß der zu beiden Stirnseiten (12, 13) des Pumpengehäuses (60) hin offene Dämpfungsraum (66) durch eine quer zu dessen Längsachse verlaufende Zwischenwand (68) unterteilt ist in eine deckelseitige Kammer (69) und eine flanschseitige Kammer (71), die über einen Durchlaß (74) in der Zwischenwand (68) miteinander verbunden sind, wobei der Durchlaß (74) und der Druckanschluß (36) im Querschnitt gesehen an entgegengesetzten Enden (72, 73) des halbkreisförmigen Dämpfungsraums (66) liegen, während der Druckanschluß (36) und die Drucköffnung (51) des Druckkanals (49) im Flansch (15) dem gleichen Ende (72) zugeordnet sind.
- Zahnradpumpe nach Anspruch 7, dadurch gekennzeichnet, daß die Breite des Dämpfungsraums (66) zwischen Innenwand (63 bis 65) und Außenwand (67) ein Vielfaches der Wandstärke der Innenwand (63 bis 65) beträgt.
- Zahnradpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß im Querschnitt gesehen der im wesentlichen ovale Innenraum (17) an seinem abgerundeten Ende symmetrisch von dem halbkreisförmigen Dämpfungsraum (66) umfaßt ist und mindestens drei Ankerbohrungen (29) symmetrisch zum Innenraum (17) in der Außenwand (67) des Pumpengehäuses (60) vorgesehen sind.
- Zahnradpumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Zahnräder (21, 22) mit ihren Wellenzapfen (23, 24) in Lagerkörpern (25, 26) gelagert sind, die zwischen beiden Stirnseiten (12, 13) des Pumpengehäuses (11, 60) in dem axial durchgehenden Innenraum (17) angeordnet sind.
- Zahnradpumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Flansch (15) einen gegenüber dem Pumpengehäuse (11, 60) vergrößerten Querschnitt aufweist, an dem ein becherförmiger, einen Tankraum (44) umschließender Behälter (42) mit seinem freien Rand (43) anbaubar ist, der in seinem Inneren das Pumpengehäuse (11, 60) mit Deckel (14) aufnimmt und daß am Flansch (15) radial verlaufende Anschlußstutzen (47, 48) für Druck- und Saugseite angeordnet sind und daß vom saugseitigen Anschlußstutzen (47) ein Saugkanal (46) über eine Öffnung (45) im Flansch (15) mit dem Tankraum (44) Verbindung hat, während ein Druckkanal (49) über eine Drucköffnung (51) im Flansch (15) mit dem Dämpfungsraum (32, 66) verbunden ist.
- Zahnradpumpe nach Anspruch 11, dadurch gekennzeichnet, daß der Flansch (15) auf der vom Behälter (42) abgewandten Seite zum Anbau eines Elektromotors zum Antrieb der Zahnräder (21, 22) ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19524965 | 1995-07-08 | ||
DE19524965A DE19524965A1 (de) | 1995-07-08 | 1995-07-08 | Zahnradmaschine (Pumpe oder Motor) |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0753666A1 EP0753666A1 (de) | 1997-01-15 |
EP0753666B1 true EP0753666B1 (de) | 2001-11-28 |
Family
ID=7766374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96110702A Expired - Lifetime EP0753666B1 (de) | 1995-07-08 | 1996-07-03 | Zahnradpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0753666B1 (de) |
DE (2) | DE19524965A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6158983A (en) * | 1997-04-24 | 2000-12-12 | Trw Inc. | Pump having muffler for attenuating noise |
DE19735245C2 (de) * | 1997-08-14 | 1999-12-09 | Bosch Gmbh Robert | Zahnradmaschine |
DE19833372A1 (de) * | 1998-07-24 | 2000-01-27 | Zahnradfabrik Friedrichshafen | Zahnradpumpe |
FR2789446B1 (fr) † | 1999-02-04 | 2002-03-08 | Hydroperfect Internat Hpi | Pompe hydraulique du type a engrenage et groupe electro-pompe equipe d'une telle pompe |
DE10051731A1 (de) * | 2000-10-18 | 2002-05-02 | Mannesmann Rexroth Ag | Schraubenspindelpumpe |
DE202004009057U1 (de) * | 2004-06-08 | 2004-10-14 | Trw Automotive Gmbh | Motor/Pumpen-Aggregat |
FR2897399B1 (fr) * | 2006-02-16 | 2013-11-15 | Jtekt Hpi | Pompe hydraulique, notamment de groupe electro-pompe en particulier pour la direction assistee de vehicule automobile |
DE102006008029B4 (de) * | 2006-02-21 | 2017-10-19 | Trw Automotive Gmbh | Pumpeneinheit |
DE102006025697A1 (de) * | 2006-06-01 | 2007-12-13 | Trw Automotive Gmbh | Deckel für ein Motor-Pumpen-Aggregat |
DE102007020002B4 (de) * | 2007-04-27 | 2018-10-04 | Trw Automotive Gmbh | Zahnradpumpe |
DE102012212829A1 (de) * | 2012-07-23 | 2014-01-23 | Robert Bosch Gmbh | Zahnradmaschine mit Drehzahlmessung anhand der Druckpulsation |
DE102020214277B3 (de) | 2020-11-13 | 2022-03-17 | Zf Friedrichshafen Ag | Schwingungsdämpfer mit einer Pumpenanordnung |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0748939A1 (de) * | 1995-06-15 | 1996-12-18 | Hydroperfect International Hpi | Elektromotor-Pumpen-Aggregat |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB498839A (en) * | 1937-07-15 | 1939-01-16 | Fanshawe Edward Standish Tufne | Improvements in or relating to gear drive pumps |
DE2608980A1 (de) * | 1976-03-04 | 1977-09-08 | Rickmeier Pumpen | Zahnradpumpe |
DE8205932U1 (de) * | 1982-03-04 | 1982-07-08 | Pumpenfabrik Urach, 7432 Urach | Kolbenpumpe mit pulsationsdaempfer-anordnung |
US4553512A (en) * | 1985-01-17 | 1985-11-19 | Gerald Showman | Fluid pump assembly |
DE4413515A1 (de) * | 1993-05-11 | 1994-11-17 | Barmag Luk Automobiltech | Hydraulikpumpe |
DE4334228A1 (de) * | 1993-10-07 | 1994-10-27 | Bosch Gmbh Robert | Hydroaggregat |
-
1995
- 1995-07-08 DE DE19524965A patent/DE19524965A1/de not_active Withdrawn
-
1996
- 1996-07-03 DE DE59608293T patent/DE59608293D1/de not_active Expired - Fee Related
- 1996-07-03 EP EP96110702A patent/EP0753666B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0748939A1 (de) * | 1995-06-15 | 1996-12-18 | Hydroperfect International Hpi | Elektromotor-Pumpen-Aggregat |
Also Published As
Publication number | Publication date |
---|---|
EP0753666A1 (de) | 1997-01-15 |
DE19524965A1 (de) | 1997-01-09 |
DE59608293D1 (de) | 2002-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69727171T2 (de) | Motorangetriebene Hydraulikpumpe und in ihr angewendete Kupplung | |
EP0753666B1 (de) | Zahnradpumpe | |
EP1036276B1 (de) | Schraubenverdichter | |
EP1702163B1 (de) | Schraubenverdichter mit einem schalldämpfer | |
DE2554105A1 (de) | Zahnradmaschine (pumpe oder motor) | |
DE19934035C2 (de) | Zahnradpumpe mit innenverzahntem Zahnrad | |
EP1503081B1 (de) | Hydropumpe | |
DE4007371A1 (de) | Auslassventilanordnung bei einem umlaufkolben-rotationskompressor | |
DE10003882C2 (de) | Kältemittelkompressor | |
DE1528949A1 (de) | Pumpe mit in der Saugleitung eingebauter,verstellbarer Drossel | |
DE4446537A1 (de) | Flüssigkeitspumpe | |
DE3500139A1 (de) | Aggregat zum foerdern von kraftstoff aus einem vorratstank zu einer brennkraftmaschine | |
DE3510027A1 (de) | Verfahren und daempfungskammeranordnung zur unterdrueckung des pulsierens bei einem taumelscheibenkompressor | |
EP1396640B1 (de) | Schraubenverdichter | |
DE4142799C1 (de) | ||
DE4239575A1 (de) | Schalldämpfer für pneumatische Pumpen, insbesondere Flügelzellenpumpen in Kraftfahrzeugen | |
DE19517628A1 (de) | Radialkolbenpumpe | |
EP1102934B1 (de) | Zahnradpumpe | |
EP0926343B1 (de) | Schalldämpfer für einen Kältemittelkompressor | |
DE1528952A1 (de) | Zahnradmaschine | |
DE4241873A1 (en) | Oil pump for engine lubrication - has inner gear and outer gear which form pump chambers with increased suction efficiency | |
DE102006008029B4 (de) | Pumpeneinheit | |
DE3243067C2 (de) | ||
DE2414760A1 (de) | Zahnradpumpe | |
DE102005033421A1 (de) | Schalldämpfer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
|
17P | Request for examination filed |
Effective date: 19970715 |
|
17Q | First examination report despatched |
Effective date: 20000703 |
|
RTI1 | Title (correction) |
Free format text: GEAR PUMP |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
RTI1 | Title (correction) |
Free format text: GEAR PUMP |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
REF | Corresponds to: |
Ref document number: 59608293 Country of ref document: DE Date of ref document: 20020110 |
|
ET | Fr: translation filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20020208 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020530 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050620 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060703 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20060703 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20080726 Year of fee payment: 13 Ref country code: FR Payment date: 20080718 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20080925 Year of fee payment: 13 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20100331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090703 |