FR408840A - - Google Patents
Info
- Publication number
- FR408840A FR408840A FR408840DA FR408840A FR 408840 A FR408840 A FR 408840A FR 408840D A FR408840D A FR 408840DA FR 408840 A FR408840 A FR 408840A
- Authority
- FR
- France
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR408840A true FR408840A (en) | 1900-01-01 |
Family
ID=1453027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR408840D Expired FR408840A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR408840A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE739123C (en) * | 1941-08-05 | 1943-09-11 | Joachim Jenning | Friction pump working with oil wedge effect |
| EP0545706A1 (en) * | 1991-12-04 | 1993-06-09 | The BOC Group plc | Vacuum pumps |
-
0
- FR FR408840D patent/FR408840A/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE739123C (en) * | 1941-08-05 | 1943-09-11 | Joachim Jenning | Friction pump working with oil wedge effect |
| EP0545706A1 (en) * | 1991-12-04 | 1993-06-09 | The BOC Group plc | Vacuum pumps |
| US5354172A (en) * | 1991-12-04 | 1994-10-11 | The Boc Group Plc | Molecular drag vacuum pump |