IT8620580A0 - IMPROVEMENTS IN MECHANICAL PUMPS. - Google Patents
IMPROVEMENTS IN MECHANICAL PUMPS.Info
- Publication number
- IT8620580A0 IT8620580A0 IT8620580A IT2058086A IT8620580A0 IT 8620580 A0 IT8620580 A0 IT 8620580A0 IT 8620580 A IT8620580 A IT 8620580A IT 2058086 A IT2058086 A IT 2058086A IT 8620580 A0 IT8620580 A0 IT 8620580A0
- Authority
- IT
- Italy
- Prior art keywords
- mechanical pumps
- pumps
- mechanical
- Prior art date
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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0021—Systems for the equilibration of forces acting on the pump
- F04C29/0028—Internal leakage control
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB858513684A GB8513684D0 (en) | 1985-05-30 | 1985-05-30 | Mechanical pumps |
Publications (3)
Publication Number | Publication Date |
---|---|
IT8620580A0 true IT8620580A0 (en) | 1986-05-27 |
IT8620580A1 IT8620580A1 (en) | 1987-11-27 |
IT1188739B IT1188739B (en) | 1988-01-28 |
Family
ID=10579927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20580/86A IT1188739B (en) | 1985-05-30 | 1986-05-27 | IMPROVEMENTS IN MECHANICAL PUMPS |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS6217389A (en) |
DE (1) | DE3617889A1 (en) |
FR (1) | FR2582741A1 (en) |
GB (2) | GB8513684D0 (en) |
IT (1) | IT1188739B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62153592A (en) * | 1985-12-26 | 1987-07-08 | Ulvac Corp | Pressure reducing shaft seal device for two stage vacuum pump |
JPS63239389A (en) * | 1987-03-25 | 1988-10-05 | Anretsuto:Kk | Shaft seal of multiple stage roots rotor using two-piece type casing |
NL9001875A (en) * | 1990-07-17 | 1992-02-17 | Bombas Stork S A | LOBBY ROTOR PUMP. |
JP2533605Y2 (en) * | 1991-03-29 | 1997-04-23 | 株式会社島津製作所 | Phase difference pump |
DE19756838C1 (en) * | 1997-12-19 | 1999-04-15 | K Busch Gmbh Druck & Vakuum Dr | Rotary piston fluid pump |
JP2002221177A (en) * | 2001-01-24 | 2002-08-09 | Toyota Industries Corp | Shaft sealing structure of vacuum pump |
JP2008008302A (en) * | 2001-09-06 | 2008-01-17 | Ulvac Japan Ltd | Energy saving method of multistage system volume transfer type dry vacuum pump |
JP2004278381A (en) * | 2003-03-14 | 2004-10-07 | Toyota Industries Corp | Gear pump |
GB0515905D0 (en) | 2005-08-02 | 2005-09-07 | Boc Group Plc | Vacuum pump |
DE202011104491U1 (en) | 2011-08-17 | 2012-11-20 | Oerlikon Leybold Vacuum Gmbh | Roots |
FR3094762B1 (en) * | 2019-04-05 | 2021-04-09 | Pfeiffer Vacuum | Dry type vacuum pump and pumping installation |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB596064A (en) * | 1945-07-17 | 1947-12-24 | Stothert & Pitt Ltd | Improvements in or relating to rotary pumps |
DE415913C (en) * | 1922-04-01 | 1925-07-10 | Siemens Schuckertwerke G M B H | Device on rotary lobe pumps for gaseous bodies to reduce leakage losses caused by overflow |
GB790799A (en) * | 1955-08-15 | 1958-02-19 | Edwards High Vacuum Ltd | Improvements in or relating to multi-stage rotary vacuum pumps |
SE302815B (en) * | 1965-01-13 | 1968-08-05 | Svenska Rotor Maskiner Ab | |
US3976405A (en) * | 1974-10-29 | 1976-08-24 | Cominco Ltd. | Pump |
JPS5163506U (en) * | 1974-11-15 | 1976-05-19 | ||
GB1570512A (en) * | 1976-09-04 | 1980-07-02 | Howden Compressors Ltd | Meshing-screw gas-compressing apparatus |
JPS5468510A (en) * | 1977-11-11 | 1979-06-01 | Kobe Steel Ltd | Gas leak preventive method for self-lubricating screw compressor |
DE2754612A1 (en) * | 1977-12-08 | 1979-06-13 | Allweiler Ag | SCREW PUMP |
US4199304A (en) * | 1978-03-13 | 1980-04-22 | Ford Motor Company | Positive displacement compact slipper pump |
JPS55104588A (en) * | 1979-02-02 | 1980-08-11 | Shin Meiwa Ind Co Ltd | Underwater blower |
GB2088957B (en) * | 1980-12-05 | 1984-12-12 | Boc Ltd | Rotary positive-displacement fluidmachines |
DE3047699A1 (en) * | 1980-12-18 | 1982-07-01 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar | ROLLING PISTON PUMP WITH PRESSURE COMPENSATION CHAMBER |
GB2111126A (en) * | 1981-12-09 | 1983-06-29 | British Oxygen Co Ltd | Rotary positive-displacement fluid-machines |
JPS59213984A (en) * | 1983-05-20 | 1984-12-03 | Nippon Piston Ring Co Ltd | Bearing device in vane type rotary compressor |
-
1985
- 1985-05-30 GB GB858513684A patent/GB8513684D0/en active Pending
-
1986
- 1986-05-09 GB GB08611363A patent/GB2175956A/en not_active Withdrawn
- 1986-05-23 JP JP61118967A patent/JPS6217389A/en active Granted
- 1986-05-27 IT IT20580/86A patent/IT1188739B/en active
- 1986-05-28 DE DE19863617889 patent/DE3617889A1/en active Granted
- 1986-05-29 FR FR8607733A patent/FR2582741A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE3617889C2 (en) | 1991-03-14 |
GB8513684D0 (en) | 1985-07-03 |
JPH0368237B2 (en) | 1991-10-25 |
GB2175956A (en) | 1986-12-10 |
JPS6217389A (en) | 1987-01-26 |
IT1188739B (en) | 1988-01-28 |
GB8611363D0 (en) | 1986-06-18 |
FR2582741A1 (en) | 1986-12-05 |
IT8620580A1 (en) | 1987-11-27 |
DE3617889A1 (en) | 1986-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970528 |