IT1188739B - IMPROVEMENTS IN MECHANICAL PUMPS - Google Patents

IMPROVEMENTS IN MECHANICAL PUMPS

Info

Publication number
IT1188739B
IT1188739B IT20580/86A IT2058086A IT1188739B IT 1188739 B IT1188739 B IT 1188739B IT 20580/86 A IT20580/86 A IT 20580/86A IT 2058086 A IT2058086 A IT 2058086A IT 1188739 B IT1188739 B IT 1188739B
Authority
IT
Italy
Prior art keywords
mechanical pumps
pumps
mechanical
Prior art date
Application number
IT20580/86A
Other languages
Italian (it)
Other versions
IT8620580A0 (en
IT8620580A1 (en
Inventor
Henryk Wycliffe
Original Assignee
Boc Group Plc
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 Plc filed Critical Boc Group Plc
Publication of IT8620580A0 publication Critical patent/IT8620580A0/en
Publication of IT8620580A1 publication Critical patent/IT8620580A1/en
Application granted granted Critical
Publication of IT1188739B publication Critical patent/IT1188739B/en

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)
IT20580/86A 1985-05-30 1986-05-27 IMPROVEMENTS IN MECHANICAL PUMPS IT1188739B (en)

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 IT8620580A0 (en) 1986-05-27
IT8620580A1 IT8620580A1 (en) 1987-11-27
IT1188739B true 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)

* 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
DE3617889C2 (en) 1991-03-14
JPH0368237B2 (en) 1991-10-25
FR2582741A1 (en) 1986-12-05
IT8620580A0 (en) 1986-05-27
DE3617889A1 (en) 1986-12-04
GB2175956A (en) 1986-12-10
JPS6217389A (en) 1987-01-26
GB8611363D0 (en) 1986-06-18
IT8620580A1 (en) 1987-11-27
GB8513684D0 (en) 1985-07-03

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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