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GB8611363D0 - Mechanical pumps - Google Patents

Mechanical pumps

Info

Publication number
GB8611363D0
GB8611363D0 GB868611363A GB8611363A GB8611363D0 GB 8611363 D0 GB8611363 D0 GB 8611363D0 GB 868611363 A GB868611363 A GB 868611363A GB 8611363 A GB8611363 A GB 8611363A GB 8611363 D0 GB8611363 D0 GB 8611363D0
Authority
GB
United Kingdom
Prior art keywords
mechanical pumps
pumps
mechanical
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.)
Withdrawn
Application number
GB868611363A
Other versions
GB2175956A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOC Group Ltd
Original Assignee
BOC Group Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BOC Group Ltd filed Critical BOC Group Ltd
Publication of GB8611363D0 publication Critical patent/GB8611363D0/en
Publication of GB2175956A publication Critical patent/GB2175956A/en
Withdrawn legal-status Critical Current

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)
GB08611363A 1985-05-30 1986-05-09 Dealing with leakage between pump stages Withdrawn GB2175956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858513684A GB8513684D0 (en) 1985-05-30 1985-05-30 Mechanical pumps

Publications (2)

Publication Number Publication Date
GB8611363D0 true GB8611363D0 (en) 1986-06-18
GB2175956A GB2175956A (en) 1986-12-10

Family

ID=10579927

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858513684A Pending GB8513684D0 (en) 1985-05-30 1985-05-30 Mechanical pumps
GB08611363A Withdrawn GB2175956A (en) 1985-05-30 1986-05-09 Dealing with leakage between pump stages

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858513684A Pending GB8513684D0 (en) 1985-05-30 1985-05-30 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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
IT1188739B (en) 1988-01-28
GB2175956A (en) 1986-12-10
GB8513684D0 (en) 1985-07-03
IT8620580A0 (en) 1986-05-27
FR2582741A1 (en) 1986-12-05
DE3617889A1 (en) 1986-12-04
IT8620580A1 (en) 1987-11-27
JPS6217389A (en) 1987-01-26
DE3617889C2 (en) 1991-03-14
JPH0368237B2 (en) 1991-10-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)