EP0839283B1 - Ölgedichtete drehschiebervakuumpumpe mit einer ölversorgung - Google Patents
Ölgedichtete drehschiebervakuumpumpe mit einer ölversorgung Download PDFInfo
- Publication number
- EP0839283B1 EP0839283B1 EP96926341A EP96926341A EP0839283B1 EP 0839283 B1 EP0839283 B1 EP 0839283B1 EP 96926341 A EP96926341 A EP 96926341A EP 96926341 A EP96926341 A EP 96926341A EP 0839283 B1 EP0839283 B1 EP 0839283B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- pump
- rotor
- bearing
- slide valve
- 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
- 238000004873 anchoring Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 54
- 239000000203 mixture Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- 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
- F04C29/02—Lubrication; Lubricant separation
- F04C29/025—Lubrication; Lubricant separation using a lubricant pump
-
- 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
- F01C21/0818—Vane tracking; control therefor
- F01C21/0854—Vane tracking; control therefor by fluid means
- F01C21/0872—Vane tracking; control therefor by fluid means the fluid being other than the working fluid
-
- 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
- F04C2220/00—Application
- F04C2220/10—Vacuum
Definitions
- the invention relates to an oil-sealed rotary vane vacuum pump with the features of the generic term of claim 1.
- DD-A-256540 is a vacuum pump with the features of the preamble of claim 1 is known.
- This document discloses a single-stage rotary vane vacuum pump, whose rotor at both ends by means of a journal bearing is mounted.
- the two trunnions and their end shields are with holes equipped, which are designed and arranged so that they have the effect of roosters which prevent entry and the exit of the slider gap control penetrating excess oil flow.
- the arrival or Allocation of the holes is selected so that the oil over the first journal enters the slider gap, when it has its largest volume. In this and also in the subsequent phase, in which the volume of the space reduced is the exit locked towards the oil sump.
- the present invention is based on the object a rotary vane vacuum pump of the type mentioned to be trained in such a way that oil noises are largely avoided are.
- the amount of oil entering the valve gap is briefly about the size of each rotor turn opposite mouths of the holes in the housing and adjustable in the storage section. You can in simply be chosen so that exactly one such amount of oil in the slider gap and then enters the scoop, which is the vacuum technology Conditions of the pump, e.g. also taking into account the application. It is essential that the oil enters the scooping chamber without pressure. From there it reaches the pump sump via the pump outlet back. Finally, it is enough to control the Oil passing through the valve gap only one journal from, so that the invention also with vacuum pumps can be used with an overhung rotor.
- the pump 1 shown comprises the assemblies housing 2, rotor 3 and drive motor 4.
- the housing 2 has essentially the shape of a pot with an outer wall 5, with the lid 6, with a Inner part 7 with the scoops 8, 9 and the bearing bore 11, with the end plate 12 and the bearing piece 13, which close the scoops 8, 9 at the end.
- the Axis of the bearing bore 11 is designated 14.
- Between outer wall 5 and inner part 7 is located the oil space 17, which partially during the operation of the pump is filled with oil.
- oil eyes 18, 19 in the cover 6 maximum, minimum Oil level. Oil filler and drain plug are not shown.
- the oil sump is designated by 20.
- the rotor 3 is located within the inner part 7 is formed in one piece and has two end faces Anchor sections 21, 22 and one between the Anchor sections 21, 22 located bearing section 23 on.
- the anchor sections 21, 22 are provided with slots 24, 25 equipped for two sliders 26, 27.
- the representation according to Figure 1 is chosen so that the respective slide spaces 28, 29 lie in the plane of the drawing.
- the slide slots 25, 26 are each of the associated Milled end face of the rotor, so that in exact slot dimensions can be achieved in a simple manner can.
- the bearing section 23 lies between the anchor sections 21, 22. Bearing section 23 and bearing bore 11 form the only bearing of the rotor.
- Anchor section 22 and the associated scooping space 9 have a larger diameter than the anchor section 21 with the scooping space 8.
- Anchor section 22 and scooping space 9 form the high vacuum stage.
- the inlet of the high vacuum stage 9, 22 with the intake manifold 30 in connection stands the inlet of the high vacuum stage 9, 22 with the intake manifold 30 in connection.
- the outlet of the high vacuum stage 9, 22 and the inlet of the fore-vacuum stage 8, 21 via the housing bore 31 in connection extends parallel to the axes of the scoops 8, 9.
- the outlet of the forevacuum stage 8, 21 opens into the oil space 17. There the oily gases calm down and leave the pump 1 through the outlet port 33.
- the inlet and outlet openings are clear of the two pump stages not shown in Fig. 1.
- the housing 2 of the pump is expedient from as few as possible Parts built up. At least that the two scoops 8, 9 and wall sections comprising the oil chamber 17 5, 7 should be formed in one piece.
- the bearing piece is coaxial with the axis 14 of the bearing bore 11 13 with a bore 35 for a rotor drive equipped. This can directly the shaft 36 of the Drive motor 4 be.
- the embodiment is between the free end face the drive shaft 36 and the rotor 3 a coupling piece 37 provided. The way of coupling the coupling piece 37 with the drive shaft 36 on the one hand and with the rotor on the other hand is not described in detail. It is explained in more detail in DE-A-43 25 285.
- the pump shown is with an integrated oil pump equipped. This consists of the in the bearing piece 13 scooping space let in from the engine side 45 with the rotating oval eccentric 46.
- the eccentric is a locking slide 47, which under the Pressure of the spiral spring 48 is.
- the eccentric 46 of the oil pump is part of the coupling piece 37. It is either fixed or positive - only with axial play - Connected to the coupling piece 37.
- the oil pump 45, 46 is 64 via a first channel from the oil space 17 and a second channel 65 oil from the Oil sump 20 supplied.
- the air-oil mixture leaving the oil pump enters channel 66 which enters the bearing bore 11 (mouth 67) opens.
- mouth 67 is the journal 23 with a continuous radial bore 68 provided, of which an axial bore 69 with a nozzle 70 branches in the direction of the slide gap 28.
- the location of the mouth 67 of the channel 66 on the one hand and the opening of the radial bore 68 in the journal 23 on the other hand is chosen so that oil from channel 66 only can then briefly enter the bore 68 when the sliders 26 assume their T position (see FIG 2).
- the radial bore 68 penetrates the bearing pin 23 completely, there are two mouths, so that each time when the slides take their T position, one Connection to the oil pump 45, 46 is established.
- the slider 26 take each revolution of the rotor 3 this T position twice. In this position the Slider gap 28 through its smallest volume. This for a short time through the nozzle into the slide gap 28 injected oil-air mixture flows through the slider gap 28 and passes without pressure into the scoop chamber 8.
- the inside of the lid 12 equipped with a groove 71, which extends from the slide gap 28 extends into the scooping space 8.
- the vacuum pump according to the invention is a one-stage Pump, then the relevant portion of the oil-air mixture flows over the bores 66, 68, 69 and the slide gap 28 into the scooping chamber 8 and arrives from there back into the oil space 17. Just a very small one Part of the oil gets into the bearing gap between the bearing bore 11 and journal 23 and supplies this storage with lubricating oil. It flows through the bearing gap and then also reaches the scooping chamber 8. Is the vacuum pump - As in the embodiment of Figure 1 shown - trained in two stages, a third occurs Oil-air partial flow in the bearing gap of the bearing 11, 23 in the direction of high vacuum pump stage 9, 22. Would Oil-air mixture get into the high vacuum stage, then would the air contained in the oil the final pressure behavior of the vacuum pump.
- the bearing pin 23 has a circumferential groove 74 equipped, at the height of which a bore 75 opens communicates with the intermediate vacuum (bore 31).
- the sectional view through a single-stage pump according to FIG. 2 shows further details. From that represented as a symbol Oil pump 45, 46 passes the oil-air mixture through the channel 66 to the mouth 67 in the bearing bore 11.
- the rotor 3 is shown in a position in which the slide 26 take their T position. In this position there is a connection of the channel 66 in the housing with the radial bore 68 in stock 23. A small, just sufficient Oil quantity passes through the holes 68, 69 (with Nozzle 70) in the slide gap 28, which is in the T position has its smallest volume.
- the groove 71 in the bearing piece 23 opposite Cover 12 is shown in dashed lines. It is in the Arranged near the outlet 30 so that one of the Slider 26 is always between inlet 33 and groove 71. Its inner end extends far into the area the recess 72 in the rotor 3, so that ensured is that the oil is the slide gap 28 without pressure build-up leave and over the turn 72 and the Groove 71 can get into the scoop space 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
Description
- Figur 1 einen Längsschnitt durch ein Ausführungsbeispiel für eine zweistufige Drehschiebervakuumpumpe nach der Erfindung und
- Figur 2 einen schematisierten Schnitt durch eine einstufige Drehschiebervakuumpumpe nach der Erfindung.
Claims (9)
- Ölgedichtete Drehschiebervakuumpumpe mit einem Schöpfraum (8), mit einem im Schöpfraum drehbar angeordneten Rotor (3), der mit einem Ankerabschnitt (21) und einem Lagerabschnitt (23) ausgerüstet ist, mit einem im Ankerabschnitt vorgesehenen Schieberschlitz (24), mit zwei im Schieberschlitz angeordneten Schiebern (26), die zwischen sich einen Schieberzwischenraum (28) bilden, mit einer Lagerung für den Rotor (3), welche den Lagerabschnitt (23) und eine Lagerbohrung (11) umfaßt, mit einer Ölpumpe (45, 46) zur Erzeugung eines den Schieberzwischenraum (28) durchsetzenden Ölstromes und mit einer Steuerung für das den Schieberzwischenraum (28) durchsetzende Öl über einen in die Lagerbohrung (11) mündenden Ölkanal (66) und über Radial- und Axialbohrungen (68, 69) im Lagerabschnitt (23), dadurch gekennzeichnet, daß die Lage der Mündungen des in die Lagerbohrung (11) mündenden Ölkanals (66) einerseits und der Radialbohrung (68) im Lagerab-schnitt (23) andererseits in Bezug auf die Stellung der Schieber (26) bzw. Schieberschlitze (24) so gewählt ist, daß Öl nur dann in den Schieberzwi-schenraum (28) gelangt, wenn dieser sein Volumen vergrößert, und daß für das den Schieberzwischenraum (28) verlassende Öl eine ständig offene, zum Schöpfraum (8) führende Verbindung vorgesehen ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Lage der Mündungen des Ölkanals (66) und der Radialbohrung (68) im Lagerabschnitt (23) so gewählt ist, daß Öl nur dann in den Zwischenraum gelangt, wenn dieser sein kleinstes Volumen hat.
- Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Axialbohrung (69) mit einer Düse (70) ausgerüstet ist.
- Pumpe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der dem Lagerabschnitt (23) gegenüberliegende Deckel (12) des Schöpfraumes (8) mit einer Nut (71) ausgerüstet ist, welche den Schieberzwischenraum (28) mit dem Schöpfraum (8) verbindet.
- Pumpe nach Anspruch 4, dadurch gekennzeichnet, daß die dem Deckel zugewandte Stirnseite des Rotors (21) mit einer zentralen Eindrehung (72) versehen ist.
- Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Radialbohrung (68) den Lagerabschnitt (23) vollständig durchsetzt.
- Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die ölpumpe (45, 46) mit Zuführungen für Öl (65) und Gas (64) ausgerüstet ist.
- Pumpe nach einem der vorhergehenden Ansprüche mit einem Rotor (3), der zwei stirnseitig angeordnete Ankerabschnitte (21, 22) zur Bildung einer Vorvakuumstufe (8, 21) und einer Hochvakuumstufe (9, 22) sowie mit einem zwischen den Ankerabschnitten (21, 22) befindlichen Lagerabschnitt (23) ausgerüstet ist, dadurch gekennzeichnet, daß für das von der Mündung (67) in Richtung Hochvakuumstufe (9, 22) strömende Öl Entgasungsmittel vorgesehen sind.
- Pumpe nach Anspruch 8, dadurch gekennzeichnet, daß der Lagerabschnitt (23) zwischen der Radialbohrung (68) und dem Ankerabschnitt (22) mit einer umlaufenden Nut (74) ausgerüstet ist, welche mit dem Zwischenvakuum (31) der Pumpe in Verbindung steht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19526303A DE19526303A1 (de) | 1995-07-19 | 1995-07-19 | Ölgedichtete Drehschiebervakuumpumpe mit einer Ölversorgung |
DE19526303 | 1995-07-19 | ||
PCT/EP1996/003078 WO1997004236A1 (de) | 1995-07-19 | 1996-07-12 | Ölgedichtete drehschiebervakuumpumpe mit einer ölversorgung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0839283A1 EP0839283A1 (de) | 1998-05-06 |
EP0839283B1 true EP0839283B1 (de) | 1999-06-09 |
Family
ID=7767207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96926341A Expired - Lifetime EP0839283B1 (de) | 1995-07-19 | 1996-07-12 | Ölgedichtete drehschiebervakuumpumpe mit einer ölversorgung |
Country Status (10)
Country | Link |
---|---|
US (1) | US6019585A (de) |
EP (1) | EP0839283B1 (de) |
JP (1) | JP3842292B2 (de) |
KR (1) | KR100442467B1 (de) |
CN (1) | CN1079505C (de) |
CA (1) | CA2227168C (de) |
DE (2) | DE19526303A1 (de) |
ES (1) | ES2133980T3 (de) |
TW (1) | TW438940B (de) |
WO (1) | WO1997004236A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100519567B1 (ko) * | 2003-09-22 | 2005-10-11 | 김덕겸 | 로터리 베인형 진공펌프 |
CN100362240C (zh) * | 2004-02-03 | 2008-01-16 | 孙洪乐 | 旋片式真空泵 |
ITTO20040268A1 (it) * | 2004-04-30 | 2004-07-30 | Varian Spa | Pompa da vuoto meccanica rotativa ad olio e metodo di produzione di detta pompa |
DE102004024554B4 (de) * | 2004-05-18 | 2018-01-25 | Pfeiffer Vacuum Gmbh | Ölgedichtete Drehschiebervakuumpumpe |
GB0607198D0 (en) * | 2006-04-10 | 2006-05-17 | Wabco Automotive Uk Ltd | Improved vacuum pump |
EP2020508A1 (de) * | 2007-07-30 | 2009-02-04 | VARIAN S.p.A. | Überdrucksicherung einer Vakuumpumpe |
JP5364052B2 (ja) * | 2010-07-22 | 2013-12-11 | 株式会社ヴァレオジャパン | ベーン型圧縮機 |
KR101220371B1 (ko) * | 2010-09-17 | 2013-01-09 | 현대자동차주식회사 | 베인펌프 |
US8267072B2 (en) * | 2010-11-02 | 2012-09-18 | Ford Global Technologies, Llc | Efficient vacuum for a vehicle |
US8355859B2 (en) * | 2010-11-02 | 2013-01-15 | Ford Global Technologies, Llc | Accessory drive for a stop/start vehicle |
US9103246B2 (en) | 2010-11-02 | 2015-08-11 | Ford Global Technologies, Llc | System and method for reducing vacuum degradation in a vehicle |
EP2559903A1 (de) | 2011-08-17 | 2013-02-20 | Wabco Automotive UK Limited | Verbesserte Vakuumpumpe |
US20140363319A1 (en) | 2013-06-07 | 2014-12-11 | Agilent Technologies, Inc | Rotary vane vacuum pump |
CN105626532B (zh) * | 2014-10-30 | 2017-07-04 | 上海汽车集团股份有限公司 | 真空泵 |
EP3492698A1 (de) | 2017-11-30 | 2019-06-05 | Agilent Technologies, Inc. (A Delaware Corporation) | Mit einer schallschutzanordnung ausgestattetes vakuumpumpsystem |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE256540C (de) * | ||||
DE1191070B (de) * | 1955-08-15 | 1965-04-15 | Edwards High Vacuum Ltd | Zweistufige, oelabgedichtete Drehkolben-Vakuumpumpe |
FR2120305A5 (de) * | 1970-12-29 | 1972-08-18 | Ducellier & Cie | |
US3760478A (en) * | 1971-10-04 | 1973-09-25 | Borg Warner | Method for assembling a rotary sliding vane compressor |
US4276005A (en) * | 1979-04-26 | 1981-06-30 | Varian Associates, Inc. | Oil flow metering structure for oil sealed mechanical vacuum vane pump |
JPS56143390A (en) * | 1980-04-08 | 1981-11-09 | Hitachi Koki Co Ltd | Oil supply device for oil-revolved vacuum pump |
JPS5925098A (ja) * | 1982-08-02 | 1984-02-08 | Ulvac Corp | 油回転真空ポンプの注油装置 |
DE8311647U1 (de) * | 1983-04-20 | 1984-07-05 | Westfalia Separator Ag, 4740 Oelde | Vakuumpumpe fuer melkanlagen |
IT1218467B (it) * | 1984-04-09 | 1990-04-19 | Barmag Barmer Maschf | Pompa ad alette e celle |
JPH0776553B2 (ja) * | 1986-02-14 | 1995-08-16 | 株式会社島津製作所 | 複連形油回転真空ポンプ |
DD256540A1 (de) * | 1986-12-30 | 1988-05-11 | Medizin Labortechnik Veb K | Druckoelschmierung fuer drehschieber-vakuumpumpen |
IT1207829B (it) * | 1987-02-04 | 1989-06-01 | Galileo Spa Off | Perfezionamento nel circuito di lubrificazione delle pompe rotative per vuoto. |
DE3922417A1 (de) * | 1989-07-07 | 1991-01-17 | Vacuubrand Gmbh & Co | Vakuumpumpe mit sicherung gegen belueftung des rezipienten bei stillstand |
KR950007519B1 (ko) * | 1992-09-09 | 1995-07-11 | 김영수 | 로터리 형식의 진공펌프장치 |
DE4325285A1 (de) * | 1993-07-28 | 1995-02-02 | Leybold Ag | Ölgedichtete Vakuumpumpe |
-
1995
- 1995-07-19 DE DE19526303A patent/DE19526303A1/de not_active Withdrawn
-
1996
- 1996-07-12 CA CA002227168A patent/CA2227168C/en not_active Expired - Fee Related
- 1996-07-12 US US08/983,538 patent/US6019585A/en not_active Expired - Lifetime
- 1996-07-12 DE DE59602183T patent/DE59602183D1/de not_active Expired - Lifetime
- 1996-07-12 WO PCT/EP1996/003078 patent/WO1997004236A1/de active IP Right Grant
- 1996-07-12 KR KR10-1998-0700237A patent/KR100442467B1/ko not_active IP Right Cessation
- 1996-07-12 CN CN96195668A patent/CN1079505C/zh not_active Expired - Fee Related
- 1996-07-12 ES ES96926341T patent/ES2133980T3/es not_active Expired - Lifetime
- 1996-07-12 EP EP96926341A patent/EP0839283B1/de not_active Expired - Lifetime
- 1996-07-12 JP JP50626997A patent/JP3842292B2/ja not_active Expired - Fee Related
- 1996-07-17 TW TW085108677A patent/TW438940B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA2227168A1 (en) | 1997-02-06 |
EP0839283A1 (de) | 1998-05-06 |
ES2133980T3 (es) | 1999-09-16 |
DE19526303A1 (de) | 1997-01-23 |
US6019585A (en) | 2000-02-01 |
TW438940B (en) | 2001-06-07 |
WO1997004236A1 (de) | 1997-02-06 |
KR19990028935A (ko) | 1999-04-15 |
CA2227168C (en) | 2007-09-11 |
KR100442467B1 (ko) | 2004-09-18 |
CN1191592A (zh) | 1998-08-26 |
DE59602183D1 (de) | 1999-07-15 |
JP3842292B2 (ja) | 2006-11-08 |
CN1079505C (zh) | 2002-02-20 |
JPH11509596A (ja) | 1999-08-24 |
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