GB616609A - Improvements in vacuum or gas pump, comprising two or more screws engaging one with the other - Google Patents
Improvements in vacuum or gas pump, comprising two or more screws engaging one with the otherInfo
- Publication number
- GB616609A GB616609A GB27110/46A GB2711046A GB616609A GB 616609 A GB616609 A GB 616609A GB 27110/46 A GB27110/46 A GB 27110/46A GB 2711046 A GB2711046 A GB 2711046A GB 616609 A GB616609 A GB 616609A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- screws
- vacuum
- ports
- pipes
- 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
- F04C18/14—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 toothed rotary pistons
- F04C18/16—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Abstract
616,609. Meshing-screw pump. CRAAF, G. A. VAN DER. Sept. 10, 1946, No. 2711 Convention date, May 21, 1942. [Class 110 (ii)] A vacuum, or other type, gas pump comprises two or more meshing screws on parallel shafts 16, in which the pitch and/or depths of the threads diminishes from the suction to the delivery. Gas enters through an inlet 6 and is delivered through ports in end caps 17. Intermediate pressures at pipes 9, 12, are adjusted to give the designed pressure ratios over the sections 3, 4, 5 of the screws. Each pair of pipes 10, 101 or 13, 13<1> leads to a chamber 11 or 14 provided with two non-return valves, which may open alternately to either release gas to atmosphere, or admit atmospheric air to maintain the pressure in the chamber at a desired figure. The ratios of the thread pitch reductions of the sections 3, 4, 5 are stated to be 2 : 1¢ : 1. Gas is delivered into end chambers by way of ports 18<1>. Sealing fluid is admitted through openings 30, 30<1> and is deposited in a curved receptacle 29 formed between the bearings of the two shafts. Specification 419,338 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL616609X | 1942-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB616609A true GB616609A (en) | 1949-01-25 |
Family
ID=19788287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27110/46A Expired GB616609A (en) | 1942-05-21 | 1946-09-10 | Improvements in vacuum or gas pump, comprising two or more screws engaging one with the other |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB616609A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2922377A (en) * | 1957-09-26 | 1960-01-26 | Joseph E Whitfield | Multiple arc generated rotors having diagonally directed fluid discharge flow |
| US3112869A (en) * | 1960-10-17 | 1963-12-03 | Willis A Aschoff | High vacuum pump |
| WO2006061317A1 (en) * | 2004-12-10 | 2006-06-15 | Leybold Vacuum Gmbh | Vacuum system comprising a rotary pump with an intermediate inlet |
| CN115559903A (en) * | 2022-10-15 | 2023-01-03 | 浙江博亚精密机械有限公司 | Efficient screw-type dry vacuum pump |
-
1946
- 1946-09-10 GB GB27110/46A patent/GB616609A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2922377A (en) * | 1957-09-26 | 1960-01-26 | Joseph E Whitfield | Multiple arc generated rotors having diagonally directed fluid discharge flow |
| US3112869A (en) * | 1960-10-17 | 1963-12-03 | Willis A Aschoff | High vacuum pump |
| WO2006061317A1 (en) * | 2004-12-10 | 2006-06-15 | Leybold Vacuum Gmbh | Vacuum system comprising a rotary pump with an intermediate inlet |
| CN115559903A (en) * | 2022-10-15 | 2023-01-03 | 浙江博亚精密机械有限公司 | Efficient screw-type dry vacuum pump |
| CN115559903B (en) * | 2022-10-15 | 2023-06-09 | 浙江博亚精密机械有限公司 | High-efficiency screw dry vacuum pump |
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