GB1400011A - Rotary vacuum pumps - Google Patents
Rotary vacuum pumpsInfo
- Publication number
- GB1400011A GB1400011A GB235172A GB235172A GB1400011A GB 1400011 A GB1400011 A GB 1400011A GB 235172 A GB235172 A GB 235172A GB 235172 A GB235172 A GB 235172A GB 1400011 A GB1400011 A GB 1400011A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- pump
- vacuum pumps
- rotary vacuum
- lubricant
- 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
Links
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
- F04D19/042—Turbomolecular vacuum 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
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid 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
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/509—Self lubricating materials; Solid lubricants
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubricants (AREA)
Abstract
1400011 Molecular pumps BRITISH OXYGEN CO Ltd, [trading as EDWARDS HIGH VACUUM INTERNATIONAL] 17 Jan 1973 [18 Jan1972] 2351/72 Heading F1C The bearings of a turbomolecular vacuum pump are lubricated with a liquid lubricant including or consisting of one or more perfluoroalkyl polyethers. Such lubricants, consisting only of fluorine, carbon and oxygen, cannot give off hydrogen, which would reduce pumping performance. Also, the vapour given off by the lubricant is resistant to polymerization when bombarded by electrons and positive ions in an electron microscope, a sputtering deposition system or other apparatus evacuated by the pump and producing high-energy electrical particles, whereby the formation of contaminent films on electrodes, targets and other surfaces is largely avoided.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB235172A GB1400011A (en) | 1972-01-18 | 1972-01-18 | Rotary vacuum pumps |
DE2302376A DE2302376A1 (en) | 1972-01-18 | 1973-01-18 | MOLECULAR VACUUM PUMP |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB235172A GB1400011A (en) | 1972-01-18 | 1972-01-18 | Rotary vacuum pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1400011A true GB1400011A (en) | 1975-07-16 |
Family
ID=9738038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB235172A Expired GB1400011A (en) | 1972-01-18 | 1972-01-18 | Rotary vacuum pumps |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2302376A1 (en) |
GB (1) | GB1400011A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223251A2 (en) * | 1985-11-20 | 1987-05-27 | AUSIMONT S.p.A. | Use of perfluoropolyethers in mechanical pumps |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19634095A1 (en) * | 1996-08-23 | 1998-02-26 | Pfeiffer Vacuum Gmbh | Entry stage for a double-flow gas friction pump |
-
1972
- 1972-01-18 GB GB235172A patent/GB1400011A/en not_active Expired
-
1973
- 1973-01-18 DE DE2302376A patent/DE2302376A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223251A2 (en) * | 1985-11-20 | 1987-05-27 | AUSIMONT S.p.A. | Use of perfluoropolyethers in mechanical pumps |
EP0223251A3 (en) * | 1985-11-20 | 1989-07-19 | Ausimont S.P.A. | Use of perfluoropolyethers in mechanical pumps |
Also Published As
Publication number | Publication date |
---|---|
DE2302376A1 (en) | 1973-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |