DE239213C - - Google Patents
Info
- Publication number
- DE239213C DE239213C DENDAT239213D DE239213DA DE239213C DE 239213 C DE239213 C DE 239213C DE NDAT239213 D DENDAT239213 D DE NDAT239213D DE 239213D A DE239213D A DE 239213DA DE 239213 C DE239213 C DE 239213C
- Authority
- DE
- Germany
- Prior art keywords
- bodies
- pump
- vacuum
- cylinder
- grooves
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/168—Pumps specially adapted to produce a vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE239213C true DE239213C (da) |
Family
ID=498677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT239213D Active DE239213C (da) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE239213C (da) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989007202A1 (en) * | 1988-01-29 | 1989-08-10 | Institut Teoreticheskoi I Prikladnoi Mekhaniki Sib | Device for pumping a fluid medium |
| DE3919529A1 (de) * | 1988-07-13 | 1990-01-18 | Osaka Vacuum Ltd | Vakuumpumpe |
| EP0445855A1 (en) * | 1990-03-09 | 1991-09-11 | VARIAN S.p.A. | Improved turbomolecular pump |
| EP0643227A1 (en) * | 1993-09-10 | 1995-03-15 | The BOC Group plc | Vacuum pumps |
| EP0874159A2 (de) * | 1993-05-03 | 1998-10-28 | Leybold Vakuum GmbH | Reibungsvakuumpumpe mit einer Gaedepumpenstufe |
| US12006443B2 (en) | 2019-10-31 | 2024-06-11 | Faber-Castell Ag | Core or crayon for writing and/or coloring |
-
0
- DE DENDAT239213D patent/DE239213C/de active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989007202A1 (en) * | 1988-01-29 | 1989-08-10 | Institut Teoreticheskoi I Prikladnoi Mekhaniki Sib | Device for pumping a fluid medium |
| DE3919529A1 (de) * | 1988-07-13 | 1990-01-18 | Osaka Vacuum Ltd | Vakuumpumpe |
| EP0445855A1 (en) * | 1990-03-09 | 1991-09-11 | VARIAN S.p.A. | Improved turbomolecular pump |
| EP0874159A2 (de) * | 1993-05-03 | 1998-10-28 | Leybold Vakuum GmbH | Reibungsvakuumpumpe mit einer Gaedepumpenstufe |
| EP0874159A3 (de) * | 1993-05-03 | 1998-11-18 | Leybold Vakuum GmbH | Reibungsvakuumpumpe mit einer Gaedepumpenstufe |
| EP0643227A1 (en) * | 1993-09-10 | 1995-03-15 | The BOC Group plc | Vacuum pumps |
| US5611660A (en) * | 1993-09-10 | 1997-03-18 | The Boc Group Plc | Compound vacuum pumps |
| US12006443B2 (en) | 2019-10-31 | 2024-06-11 | Faber-Castell Ag | Core or crayon for writing and/or coloring |
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