EP0911524A1 - Sichellose Innenzahnradmaschine - Google Patents
Sichellose Innenzahnradmaschine Download PDFInfo
- Publication number
- EP0911524A1 EP0911524A1 EP98118622A EP98118622A EP0911524A1 EP 0911524 A1 EP0911524 A1 EP 0911524A1 EP 98118622 A EP98118622 A EP 98118622A EP 98118622 A EP98118622 A EP 98118622A EP 0911524 A1 EP0911524 A1 EP 0911524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal gear
- engine
- pinion
- pump
- sealing
- 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.)
- Granted
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
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0007—Radial sealings for working fluid
- F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
- F01C21/0809—Construction of vanes or vane holders
-
- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
Definitions
- the invention is based on a sickle-free internal gear machine according to the preamble of claim 1.
- Crescentless internal gear machines have engines with an internally toothed ring gear and an externally toothed pinion meshing with this ring gear.
- This pinion is eccentrically offset from the ring gear and has a toothing with at least one around a tooth lower number of teeth than the toothing of the ring gear.
- the engine is usually driven or driven via the pinion.
- Such engines form tooth chambers, which are given a periodic change in volume during operation of the internal gear machine.
- the tooth chambers pass through a suction, a pressure and two intermediate reversal phases. A pressure medium is thereby transported in the tooth chambers from an inlet on the housing side to an outlet, energy being supplied or withdrawn from the pressure medium, depending on the operating mode of the internal gear machine as a pump or motor.
- a sickle-free internal gear machine the characterizing features of claim 1 the advantage on that the pressurized surfaces of the sealing elements and thus the forces acting on the sealing elements the pressure angle of the engine are almost constant. This is achieved with sealing elements with a defined sealing edge reached. Apart from the smoothing of the force relationships the load on the sealing elements Sealing elements reduced and thus the life of the internal gear machine elevated. Conversely, can internal gear machines designed in this way with unchanged Use the service life also for higher operating pressures. Further advantages or advantageous developments of the invention result from the subclaims and the description.
- FIG. 1 shows a cross section through a crescentless internal gear machine
- Figure 2 the detail is X according to Figure 1, which is a section of the engine at the time the changeover phase from the suction to the pressure phase shows, shown enlarged.
- the internal gear machine 10 has a housing 11, in the interior thereof an engine 12 is arranged.
- the engine 12 consists of an internally toothed ring gear 13 with a externally toothed pinion 14 combs.
- the pinion 14 is eccentric arranged to the ring gear 13 and closes with the ring gear 13 mutually sealed tooth chambers 15 a.
- the Tooth chambers 15 become in the course of one revolution of the engine 12 issued a periodic volume change, whereby a pressure medium from an inlet 17 to an outlet 18 flows.
- the inlet 17 and the outlet 18 are on the housing 11 educated.
- sealing elements 19 arranged in the tooth heads of the ring gear. These sealing elements 19 are supported in the two Reversal phases on the toothing contour of the pinion 14.
- Figure 2 shows a detail X ( Figure 1) of the engine 12 for Time of changeover from the suction to the pressure phase in an enlarged view.
- Figure 2 lie a tooth of the pinion 14 and a tooth of the ring gear 13 directly across from.
- the following description will assumed that the ring gear 13 and the pinion 14th in the direction indicated by the directional arrow D. turn and that in the leading tooth chamber 15.1 higher pressure than in the lagging tooth chamber 15.2 prevails.
- the leading tooth chamber 15.1 is over a Pressure medium connection 23 connected to a profile groove 20, in which a sealing element 19 is guided in a radially movable manner.
- a compression spring 24 is arranged in the profile groove 20 on the one hand at the bottom of the profile groove 20 and on the other is supported on the sealing element 19. The preload of the compression spring 24 acts one acting on the sealing element 19 Centrifugal force and presses together with a hydraulic force the sealing element 19 against the toothing of the pinion 14.
- the sealing element 19 has the shape of the letter J and has a transverse web 25, a shaft 26 and a foot 27. While the crosspiece 25 and the shaft 26 lie inside the profile groove 20, the foot 27 protrudes from the profile groove 20.
- the shaft 26 has two guide flanks 28, 29 which run parallel to one another and bear against the corresponding wall of the profile groove 20. In order to ensure the radial mobility of the sealing element 19, there is a slight radial play between the shaft 26 and the wall of the profile groove 20.
- the transverse web 25 of the sealing element 19 forms a stop 30 which is arranged laterally on the guide flank 28 lagging in the direction of rotation D of the ring gear 13 and which has a bevelled rear flank 33.
- This rear flank 33 interacts with a shoulder 34 of the profile groove 20 and prevents the sealing element 19 from falling out of this profile groove 20.
- the foot 27 of the sealing element 19 protruding from the profile groove 20 is beveled against the direction of rotation D of the ring gear 13 and forms the pinion on it 14 facing end face from a relatively sharp-edged sealing edge 35.
- This sealing edge 35 is formed by two rectilinear legs 36, 37 which, with the axis of the sealing element 19 lying in the direction of movement, incline angles W1, W2 of different sizes.
- the size of the two inclination angles W1, W2 is matched to the contour of the toothing of the pinion 14 in such a way that, at any point in time during the two reversing phases of the engine 12, the inclination angle W3 of a tangent T, which is at the sealing point of the sealing element 19 on the pinion 14 to the contour of this pinion 14 is greater than the angles of inclination W1 and W2 of the legs 36, 37.
- This requirement ensures that the sealing edge 35 bears against the pinion 14 during the entire reversal phase of the engine 19.
- the leg 36 lagging in the direction of rotation D is connected to the guide flank 28 via a bevel 38, while the leading leg 37 merges directly into the leading lead flank 29 of the shaft 26. Furthermore, the sealing edge 35 is offset from the trailing leading edge 28 by a distance A in the direction of rotation D forward.
- the described geometric design of the sealing elements 19 explains itself when considering the hydraulic Conditions on the sealing elements 19 during operation the internal gear machine 10.
- the geometry of the sealing elements 19 aims at one hand, these sealing elements 19 possible in both reversal phases of the engine 12 press lightly on the pinion 14 in order to minimize wear on the sealing edge 35, on the other hand but the sealing effect of the sealing edge 35 in all operating states to ensure the internal gear machine 10.
- the hydraulic loading of the sealing elements 19 as quickly as possible to changing operating conditions adjust the internal gear machine 10.
- a hydraulic counterforce acts on the sealing element 19 opposite.
- This counterforce consists of one first force component by the area of the high pressure area lying leading leg 37 generated is and a second force component, which by the hydraulic effective area of the lagging in the low pressure area Dental chamber 15.2 lying trailing leg 36 of the sealing element 19 is formed together. Because of the bevel 38 is from the total area of the leg 36 only that by the distance A between the lagging Leading edge 28 and the sealing edge 35 determined Surface section hydraulically effective. Only on this surface section a sealing element 19 there is no pressure equilibrium.
- the resulting force is therefore the pressure difference between the two tooth chambers 15.1, 15.2 and in size the pressure area of the sealing element defined by the distance A. 19 set.
- the contact pressure can be reduced of the sealing element 35 on the pinion 14 application-specific adjust over the dimension of the distance A.
- This Contact force changes its size in the course of one revolution of the engine 12 at most insignificant, since the location of the Sealing edge 35 and thus the area ratios on Sealing element 19 remain largely constant.
- the measure of the distance A can be between a minimum value and vary a maximum value.
- the minimum value has been reached if the sealing edge 35 with the trailing guide surface 28 is aligned - in this case there is sealing element 19 hydraulic balance, i.e. towards that Pinion 14 acts only on the force of the compression spring 24 on the sealing element 19 a.
- the maximum value for the distance A is dependent on the toothing contour of the pinion 14.
- Essential for the maximum value of the distance A is that the Sealing edge 35 over the entire changeover phase of the engine 12 rests on the pinion 14.
- Exceeding the maximum value leads to the sealing edge 34 of the contour of the Interlocking of the pinion 14 at least over part of the changeover phase of the engine 12 takes off, which again variable sealing conditions between the pinion 14 and would set the ring gear 13.
- the sealing element 19 is with its sealing edge 35 at the interdental spaces of the ring gear 13 (Fig.1).
- the tooth chamber leading in direction of rotation D. 15.1 is already on the pressure medium connection 23 connected to the low pressure side of the internal gear machine 10, while the trailing tooth chamber 15.2 is still under high pressure is acted upon.
- the one determined by the distance A, not pressure-balanced pressure surface of the sealing element 19 results a force directed away from the ring gear 13 caused by the the sealing element 19 acting centrifugal force is reinforced.
- the compressive force of the compression spring 24 acts on these two forces opposite.
- the compression spring 24 is dimensioned so that the amount of compressive force is greater than the centrifugal force and the hydraulic force together. This is the plant of the Sealing element 19 on the ring gear 13 also in this second reversing phase ensured.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
geringeren Zähnezahl als die Verzahnung des Hohlrads. Über das Ritzel erfolgt gewöhnlich der An- oder Abtrieb des Triebwerks. Derartige Triebwerke bilden Zahnkammern aus, denen im Betrieb der Innenzahnradmaschine eine periodische Volumenänderung erteilt wird. Die Zahnkammern durchlaufen dabei eine Saug-, eine Druck- und zwei dazwischenliegende Umsteuerphasen. In den Zahnkammern wird dadurch ein Druckmittel von einem gehäuseseitigen Zulauf zu einem Ablauf transportiert, wobei dem Druckmittel, abhängig von der Betriebsart der Innenzahnradmaschine als Pumpe oder Motor, Energie zugeführt oder entzogen wird.
Zur Abdichtung der Hochdruckseite gegenüber der Niederdruckseite weisen diese Innenzahnradmaschinen Abdichtelemente auf, die in den Zahnköpfen des Hohlrads in dafür vorgesehenen Profilnuten angeordnet sind. Diese Abdichtelemente sind pilzförmig geformt und haben einen konischen Schaft sowie einen aus der Profilnut herausragenden Kopf. Der Kopf liegt in den beiden Umsteuerphasen des Triebwerks an der Verzahnung des Ritzels an. Die dem Ritzel zugewandten Stirnflächen der Abdichtelemente sind bogenförmig gewölbt und bilden mit der Verzahnung des Ritzels jeweils eine Dichtstelle aus. Diese Dichtstelle verändert ihre Lage am Abdichtelement im Verlauf der Umsteuerphase kontinuierlich. Dies hat den Nachteil, daß sich die druckbeaufschlagten Flächen und damit die Kraftverhältnisse an den Abdichtelementen mit zunehmendem Eingriffswinkel des Triebwerks ändern. Um die wechselnden Belastungen der Abdichtelemente in definierten Grenzen zu halten, sind die im Inneren der Profilnut liegenden Stirnflächen der Abdichtelemente hydraulisch beaufschlagt. Hierzu sind allerdings eine Vielzahl von Druckkanälen und Drosseleinrichtungen notwendig, deren Wirksamkeit nicht für alle Betriebszustände einer Innenzahnradmaschine ausreichend gegeben ist. Zudem ist die Herstellung der Druckkanäle relativ aufwendig und dementsprechend teuer.
Der in Drehrichtung D nacheilende Schenkel 36 ist über eine Abschrägung 38 mit der Führungsflanke 28 verbunden, während der vorauseilende Schenkel 37 unmittelbar in die vorauseilende Führungsflanke 29 des Schafts 26 übergeht. Desweiteren ist die Dichtkante 35 gegenüber der nacheilenden Führungsflanke 28 um einen Abstand A in Drehrichtung D nach vorne versetzt angeordnet.
Diesbezüglich ist anzumerken, daß die Druckmittelverbindungen 23 zwischen den in Drehrichtung D des Triebwerks vorauseilenden Zahnkammern 15.2 und der die Abdichtelemente 19 aufnehmenden Profilnuten 20 sowohl als Bohrungen in den Zahnflanken der Zähne des Hohlrades 13, als auch als Nuten, in wenigstens einer der das Triebwerk 12 seitlich begrenzenden Wandungen ausgebildet sein können.
Claims (8)
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) mit einem Gehäuse (11), in dem ein Triebwerk (12) aus wenigstens einem innenverzahnten Hohlrad (13) und wenigstens einem mit dem Hohlrad (13) kämmenden außenverzahnten Ritzel (14) ein Druckmittel in den von dem wenigstens einen Hohlrad (13) und dem wenigstens einen Ritzel (14) eingeschlossenen Zahnkammern (15) von einem Zulauf (17) zu einem Ablauf (18) fördert, wobei die Zahnkammern (15) gegeneinander mittels Abdichtelementen (19) abgedichtet sind, die abschnittsweise radial beweglich in Profilnuten (20) des Hohlrades (13) geführt sind, dadurch gekennzeichnet, daß die Abdichtelemente (19) an ihren dem Ritzel (14) zugewandten ersten Enden jeweils eine Dichtkante (35) aufweisen, die von jeweils zwei Flanken (36, 37) des Abdichtelements (19) gebildet wird, und daß die beiden Flanken (36, 37) mit der in Bewegungsrichtung liegenden Achse des Abdichtelements (19) unterschiedlich große Neigungswinkel (W1, W2) einschließen.
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach Anspruch 1, dadurch gekennzeichnet, daß der Neigungswinkel (W3) einer Tangente (T), die an der Abstützstelle der Dichtkante (35) am Ritzel (14) an die Verzahnungskontur dieses Ritzels (14) angelegt ist, zu jedem Zeitpunkt der beiden Umsteuerphasen des Triebwerks (12) größer ist, als die Neigungswinkel (W1, W2) der beiden Flanken (36, 37).
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Abdichtelemente (19) einen im Inneren der Profilnut (20) liegenden Schaft (26) mit zwei zueinander parallelen Führungsflanken (28, 29) aufweisen, daß der Schaft (26) einen Anschlag (30) aufweist, der mit einer in der Profilnut (20) ausgebildeten Schulter (34) zusammenwirkt, und daß der Schaft (26) an seinem dem Ritzel (14) zugewandten Ende einen aus der Profilnut (20) herausragenden und entgegen der Drehrichtung (D) des Triebwerks (12) abgeschrägten Fuß (37) ausbildet.
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Dichtkante (35) zu der in Drehrichtung (D) des Triebwerks (12) nacheilenden Führungsflanke (28) des Schaftes (26) einen Abstand (A) aufweist.
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Anschlag (30) und der Fuß (37) des Abdichtelements (19) hydraulisch wirksame Rückseiten (33, 38) aufweisen.
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in der Profilnut (20) ein Federelement (24) angeordnet ist, das sich an der Profilnut (20) einerseits und am Abdichtelement (19) andererseits abstützt, und daß die Profilnut (20) über eine hydraulische Verbindung (23) mit der in Drehrichtung des Triebwerks (12) vorauseilenden Zahnkammer (15.1) verbunden ist.
- Sichellose Innenzahnradmaschine (10) (Pumpe oder Motor) nach Anspruch 6, dadurch gekennzeichnet, daß die hydraulische Verbindung (23) eine Nut ist, die in wenigstens einer der das Triebwerk (12) seitlich begrenzenden Wandungen ausgebildet ist.
- Sichellose Innnenzahnradmaschine (10) (Pumpe oder Motor) nach Anspruch 6, dadurch gekennzeichnet, daß die hydraulische Verbindung (23) eine Bohrung ist, die in der in Drehrichtung (D) des Triebwerks (12) vorauseilenden Zahnflanke des Hohlrades (13) ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19746769 | 1997-10-23 | ||
DE19746769A DE19746769C1 (de) | 1997-10-23 | 1997-10-23 | Sichellose Innenzahnradmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0911524A1 true EP0911524A1 (de) | 1999-04-28 |
EP0911524B1 EP0911524B1 (de) | 2003-03-26 |
Family
ID=7846352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98118622A Expired - Lifetime EP0911524B1 (de) | 1997-10-23 | 1998-10-01 | Sichellose Innenzahnradmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0911524B1 (de) |
DE (2) | DE19746769C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104895781A (zh) * | 2014-09-17 | 2015-09-09 | 襄阳博亚精工装备股份有限公司 | 一种内啮合齿轮泵 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221665A (en) * | 1962-01-11 | 1965-12-07 | Hartmann Mfg Co | Hydraulic pump or motor with hydraulic pressure-responsive vane |
US3279387A (en) * | 1964-02-03 | 1966-10-18 | Daniel F Mcgill | Reversable pump and motor |
EP0545424A1 (de) | 1991-12-06 | 1993-06-09 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
DE4332540A1 (de) * | 1993-09-24 | 1995-03-30 | Bosch Gmbh Robert | Flügelzellenpumpe |
EP0661454A1 (de) | 1993-12-17 | 1995-07-05 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe |
EP0686771A2 (de) * | 1994-06-08 | 1995-12-13 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE139305T1 (de) * | 1993-01-18 | 1996-06-15 | Voith Gmbh J M | Sichellose innenzahnradpumpe mit in die zahnköpfe eingesetzten dichtelementen |
-
1997
- 1997-10-23 DE DE19746769A patent/DE19746769C1/de not_active Expired - Fee Related
-
1998
- 1998-10-01 EP EP98118622A patent/EP0911524B1/de not_active Expired - Lifetime
- 1998-10-01 DE DE59807629T patent/DE59807629D1/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221665A (en) * | 1962-01-11 | 1965-12-07 | Hartmann Mfg Co | Hydraulic pump or motor with hydraulic pressure-responsive vane |
US3279387A (en) * | 1964-02-03 | 1966-10-18 | Daniel F Mcgill | Reversable pump and motor |
EP0545424A1 (de) | 1991-12-06 | 1993-06-09 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
DE4332540A1 (de) * | 1993-09-24 | 1995-03-30 | Bosch Gmbh Robert | Flügelzellenpumpe |
EP0661454A1 (de) | 1993-12-17 | 1995-07-05 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe |
EP0686771A2 (de) * | 1994-06-08 | 1995-12-13 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104895781A (zh) * | 2014-09-17 | 2015-09-09 | 襄阳博亚精工装备股份有限公司 | 一种内啮合齿轮泵 |
Also Published As
Publication number | Publication date |
---|---|
EP0911524B1 (de) | 2003-03-26 |
DE19746769C1 (de) | 1999-02-11 |
DE59807629D1 (de) | 2003-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2033201C3 (de) | Schraubenspindelmotor oder -pumpe | |
EP0563661A1 (de) | Sichellose Innenzahnradpumpe mit radial beweglichen Dichtelementen zur Radialkompensation | |
WO1989002515A1 (en) | Gearwheel motor | |
DE2016097A1 (de) | Zahnradpumpe oder motor | |
DE102012206699A1 (de) | Zahnradmaschine mit wannenartiger Vertiefung an der Außenoberfläche des Gehäuses | |
DE19924057A1 (de) | Zahnradmaschine (Pumpe oder Motor) | |
EP0911524B1 (de) | Sichellose Innenzahnradmaschine | |
WO1992008051A1 (de) | Kolbenpumpe, insbesondere radialkolbenpumpe | |
DE4421255C1 (de) | Füllstücklose Innenzahnradpumpe | |
DE10052779A1 (de) | Füllstücklose Innenzahnradpumpe | |
DE1653810A1 (de) | Druckbelastete Pumpe | |
DE2134241C3 (de) | Zweistufige außenachsige Rotationskolbenmaschine | |
DE102016213696B4 (de) | Zahnradfluidmaschine | |
EP0563608A1 (de) | Reversierbare Zahnradmaschine | |
DE102019127388A1 (de) | Fluidversorgung von Unterflügelkammern einer Flügelzellenpumpe | |
EP0802326B1 (de) | Zahnradmaschine mit kontrollierbar ausgeglichenem Druckfeld | |
DE2650908A1 (de) | Innenzahnradmaschine (pumpe oder motor) | |
DE1280056B (de) | Drehkolbenmaschine mit zwei Zahnraedern im Inneneingriff | |
DE2634065A1 (de) | Reversierbare, hydrostatische radial- oder axialkolbenmaschine | |
DE2414760A1 (de) | Zahnradpumpe | |
EP0775826A1 (de) | Schraubenverdichter | |
DE19942297A1 (de) | Zahnradmaschine | |
DE102010005984B4 (de) | Regelölpumpe | |
AT311178B (de) | Gas- und Hydromotor oder Pumpe | |
DE2701303C3 (de) | Hydraulische Zahnradmaschine |
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 FR GB IT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 19991028 |
|
AKX | Designation fees paid |
Free format text: DE FR GB IT |
|
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 |
Designated state(s): DE FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 59807629 Country of ref document: DE Date of ref document: 20030430 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ET | Fr: translation filed | ||
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 |
Effective date: 20031230 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050923 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20051118 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20061031 Year of fee payment: 9 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20061001 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20070629 |
|
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: 20061001 |
|
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: 20061031 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20071219 Year of fee payment: 10 |
|
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: 20071001 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090501 |