GB772999A - Improvements in or relating to roots-type mechanical high-vacuum pumps - Google Patents
Improvements in or relating to roots-type mechanical high-vacuum pumpsInfo
- Publication number
- GB772999A GB772999A GB27370/55A GB2737055A GB772999A GB 772999 A GB772999 A GB 772999A GB 27370/55 A GB27370/55 A GB 27370/55A GB 2737055 A GB2737055 A GB 2737055A GB 772999 A GB772999 A GB 772999A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- roots
- chamber
- relating
- vacuum pumps
- 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
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
772,999. Rotary pumps. HERAEUS, GES., W. C. Sept. 26, 1955 [Sept. 24, 1954], No. 27370/55. Class 110 (2). In a vacuum pump of the Roots' blower type the rotors 3a, 3b and the stationary shafts 6a, 6b are each provided with passages as shown, whereby the air gap in the contact zone of the rotors may periodically communicate with a chamber of low pressure relative to the delivery side of the pump-such as the scoop chamber 9. Several such pressure equalizing passages may be provided for each rotor. The driving motor (not shown) for the pump may also be enclosed within the pump casing which comprises inner and outer walls 1, 2 defining a chamber 11 therebetween which communicates with the inlet side of the pump.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE772999X | 1954-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB772999A true GB772999A (en) | 1957-04-17 |
Family
ID=6683048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27370/55A Expired GB772999A (en) | 1954-09-24 | 1955-09-26 | Improvements in or relating to roots-type mechanical high-vacuum pumps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB772999A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3527292A1 (en) * | 1985-07-30 | 1987-02-12 | Aerzener Maschf Gmbh | METHOD FOR COMPRESSING GAS SHAPED CONVEYOR MEDIUM AND ROOTS COMPRESSOR FOR CARRYING OUT THE METHOD |
WO2019171074A1 (en) * | 2018-03-09 | 2019-09-12 | Edwards Limited | A vacuum pump with a pressure relief valve |
-
1955
- 1955-09-26 GB GB27370/55A patent/GB772999A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3527292A1 (en) * | 1985-07-30 | 1987-02-12 | Aerzener Maschf Gmbh | METHOD FOR COMPRESSING GAS SHAPED CONVEYOR MEDIUM AND ROOTS COMPRESSOR FOR CARRYING OUT THE METHOD |
WO2019171074A1 (en) * | 2018-03-09 | 2019-09-12 | Edwards Limited | A vacuum pump with a pressure relief valve |
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