DE69021370D1 - Zweistufiges Pumpsystem. - Google Patents
Zweistufiges Pumpsystem.Info
- Publication number
- DE69021370D1 DE69021370D1 DE69021370T DE69021370T DE69021370D1 DE 69021370 D1 DE69021370 D1 DE 69021370D1 DE 69021370 T DE69021370 T DE 69021370T DE 69021370 T DE69021370 T DE 69021370T DE 69021370 D1 DE69021370 D1 DE 69021370D1
- Authority
- DE
- Germany
- Prior art keywords
- pump system
- stage pump
- stage
- pump
- 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 - Fee Related
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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/497,326 US5131817A (en) | 1990-03-22 | 1990-03-22 | Two-stage pumping system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69021370D1 true DE69021370D1 (de) | 1995-09-07 |
DE69021370T2 DE69021370T2 (de) | 1996-01-25 |
Family
ID=23976408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69021370T Expired - Fee Related DE69021370T2 (de) | 1990-03-22 | 1990-12-14 | Zweistufiges Pumpsystem. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5131817A (de) |
EP (1) | EP0447716B1 (de) |
CA (1) | CA2034039C (de) |
DE (1) | DE69021370T2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE58901145D1 (de) * | 1988-06-24 | 1992-05-21 | Siemens Ag | Mehrstufiges vakuumpumpenaggregat. |
US5273412A (en) * | 1991-03-28 | 1993-12-28 | Grasso's Koninklijke Machinefabrieken N.V. | Lubricated rotary compressor having a cooling medium inlet to the delivery port |
IT1289796B1 (it) * | 1996-12-23 | 1998-10-16 | Elasis Sistema Ricerca Fiat | Perfezionamenti ad un dispositivo a pompa per l'alimentazione del carburante da un serbatoio ad un motore a combustione interna. |
US5899668A (en) * | 1997-01-30 | 1999-05-04 | The Nash Engineering Company | Two-stage liquid ring pumps having separate gas and liquid inlets to the second stage |
JP2000283024A (ja) * | 1999-03-30 | 2000-10-10 | Aisin Seiki Co Ltd | ポンプ装置 |
US20110194950A1 (en) * | 2010-02-10 | 2011-08-11 | Shenoi Ramesh B | Efficiency improvements for liquid ring pumps |
CN104632630B (zh) * | 2013-11-13 | 2017-01-11 | 中国科学院沈阳科学仪器股份有限公司 | 一种罗茨干泵热膨胀的控制***及方法 |
US11815095B2 (en) * | 2019-01-10 | 2023-11-14 | Elival Co., Ltd | Power saving vacuuming pump system based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps |
US20230096279A1 (en) * | 2021-09-27 | 2023-03-30 | Raymond Zhou Shaw | Vacuum system having condenser and root vacuum pump set |
US20230167822A1 (en) * | 2021-09-27 | 2023-06-01 | Raymond Zhou Shaw | Vacuum system having condenser and root vacuum pump set |
CN114837950B (zh) * | 2022-05-27 | 2024-06-21 | 山东省章丘鼓风机股份有限公司 | 罗茨真空泵的逆流口面积计算及位置确定的方法 |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US117626A (en) * | 1871-08-01 | Improvement in supplying water to air-pumps | ||
US1097783A (en) * | 1911-01-28 | 1914-05-26 | Burgess Sulphite Fibre Co | Process of blowing acid gases. |
US1155335A (en) * | 1912-12-30 | 1915-10-05 | Augustus Lea Bricknell | Internal-combustion engine. |
US1340165A (en) * | 1919-05-26 | 1920-05-18 | Worthington Pump & Mach Corp | Condenser system and vacuum-pump |
US1491993A (en) * | 1919-11-01 | 1924-04-29 | Delco Light Co | Rotary pressure or vacuum pump |
US2404660A (en) * | 1943-08-26 | 1946-07-23 | Wilfred J Rouleau | Air compressor |
US2489887A (en) * | 1946-07-11 | 1949-11-29 | Roots Connersville Blower Corp | Rotary pump |
FR1129872A (fr) * | 1954-08-21 | 1957-01-28 | Heraeus Gmbh W C | Pompe mécanique à vide poussé du type roots |
US2971691A (en) * | 1955-08-16 | 1961-02-14 | Heraeus Gmbh W C | Pumping system |
GB810166A (en) * | 1957-01-30 | 1959-03-11 | Hathaway Ltd L | Improvements in and relating to priming systems for centrifugal pumps |
SE317154B (de) * | 1959-01-15 | 1969-11-10 | Svenska Rotor Maskiner Ab | |
US3105630A (en) * | 1960-06-02 | 1963-10-01 | Atlas Copco Ab | Compressor units |
US3109297A (en) * | 1961-09-20 | 1963-11-05 | Gen Electric | Rotary compressor injection cooling arrangement |
DE1428248A1 (de) * | 1962-12-01 | 1969-02-13 | Svenska Rotor Maskiner Ab | Drehkolben-Kompressormaschine |
US3289591A (en) * | 1963-02-12 | 1966-12-06 | Eriksson Sven Gustaf | Device for sucking liquid, air and solid particles |
SE310751B (de) * | 1963-12-23 | 1969-05-12 | Svenska Rotor Maskiner Ab | |
US3231179A (en) * | 1964-06-02 | 1966-01-25 | Technical Ind Inc | Lobular type of pump |
GB1172993A (en) * | 1966-02-23 | 1969-12-03 | Plessey Co Ltd | Improvements in or relating to Rotary-Positive Displacement Machines |
US3575539A (en) * | 1968-11-27 | 1971-04-20 | United States Steel Corp | Apparatus for suppressing vibration in a helical-rotor axial-flow compressor supplied with sealing water |
US3642384A (en) * | 1969-11-19 | 1972-02-15 | Henry Huse | Multistage vacuum pumping system |
FR2097285A5 (de) * | 1970-07-01 | 1972-03-03 | Joy Mfg Co | |
US3910731A (en) * | 1970-07-09 | 1975-10-07 | Svenska Rotor Maskiner Ab | Screw rotor machine with multiple working spaces interconnected via communication channel in common end plate |
US3922110A (en) * | 1974-01-28 | 1975-11-25 | Henry Huse | Multi-stage vacuum pump |
US3956072A (en) * | 1975-08-21 | 1976-05-11 | Atlantic Fluidics, Inc. | Vapor distillation apparatus with two disparate compressors |
US4123203A (en) * | 1977-10-14 | 1978-10-31 | Gardner-Denver Company | Multistage helical screw compressor with liquid injection |
DE3209035A1 (de) * | 1981-03-13 | 1982-09-30 | Sullair Technology AB, 11653 Stockholm | Verfahren und vorrichtung zur zwischenkuehlung in einem oeleingespritzten mehrstufen-schraubenkompressor |
JPS58183888A (ja) * | 1982-04-21 | 1983-10-27 | Hitachi Ltd | 油冷式スクリユ−圧縮機の給油装置 |
US4812110A (en) * | 1986-08-11 | 1989-03-14 | Kabushiki Kaisha Kobe Seiko Sho | Oil-free screw compressor with bypass of cooled discharged gas |
JPH0733834B2 (ja) * | 1986-12-18 | 1995-04-12 | 株式会社宇野澤組鐵工所 | ロータ内蔵ハウジングの外周温度が安定化された内部分流逆流冷却多段式の三葉式真空ポンプ |
-
1990
- 1990-03-22 US US07/497,326 patent/US5131817A/en not_active Expired - Lifetime
- 1990-12-14 EP EP90313636A patent/EP0447716B1/de not_active Expired - Lifetime
- 1990-12-14 DE DE69021370T patent/DE69021370T2/de not_active Expired - Fee Related
-
1991
- 1991-01-11 CA CA002034039A patent/CA2034039C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69021370T2 (de) | 1996-01-25 |
US5131817A (en) | 1992-07-21 |
CA2034039C (en) | 2000-10-24 |
EP0447716B1 (de) | 1995-08-02 |
CA2034039A1 (en) | 1991-09-23 |
EP0447716A1 (de) | 1991-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: NASH_ELMO INDUSTRIES,L.L.C.(N.D.GES.D.STAATES DELA |
|
8339 | Ceased/non-payment of the annual fee |