GB0419505D0 - Vacuum pump - Google Patents

Vacuum pump

Info

Publication number
GB0419505D0
GB0419505D0 GB0419505A GB0419505A GB0419505D0 GB 0419505 D0 GB0419505 D0 GB 0419505D0 GB 0419505 A GB0419505 A GB 0419505A GB 0419505 A GB0419505 A GB 0419505A GB 0419505 D0 GB0419505 D0 GB 0419505D0
Authority
GB
United Kingdom
Prior art keywords
vacuum pump
vacuum
pump
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Withdrawn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
GB0419505A
Other versions
GB2417757A (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
Priority to GB0419505A priority Critical patent/GB2417757A/en
Publication of GB0419505D0 publication Critical patent/GB0419505D0/en
Publication of GB2417757A publication Critical patent/GB2417757A/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04C18/165—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 having more than two rotary pistons with parallel axes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
GB0419505A 2004-09-02 2004-09-02 Vacuum pump with fewer rotors at exhaust stage Withdrawn GB2417757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0419505A GB2417757A (en) 2004-09-02 2004-09-02 Vacuum pump with fewer rotors at exhaust stage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0419505A GB2417757A (en) 2004-09-02 2004-09-02 Vacuum pump with fewer rotors at exhaust stage

Publications (2)

Publication Number Publication Date
GB0419505D0 true GB0419505D0 (en) 2004-10-06
GB2417757A GB2417757A (en) 2006-03-08

Family

ID=33155924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0419505A Withdrawn GB2417757A (en) 2004-09-02 2004-09-02 Vacuum pump with fewer rotors at exhaust stage

Country Status (1)

Country Link
GB (1) GB2417757A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101985937B (en) * 2010-11-30 2012-10-17 东北大学 Triaxial claw vacuum pump
CN110500275B (en) 2019-09-23 2021-03-16 兑通真空技术(上海)有限公司 Pump housing structure of triaxial multistage roots pump
CN210629269U (en) 2019-09-23 2020-05-26 兑通真空技术(上海)有限公司 Motor connection transmission structure of roots pump
CN110594156B (en) 2019-09-23 2021-05-25 兑通真空技术(上海)有限公司 Driving structure of three-axis multistage roots pump
CN110685912A (en) 2019-10-10 2020-01-14 兑通真空技术(上海)有限公司 Structure for connecting multi-shaft multi-stage roots pump rotors

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068984A (en) * 1974-12-03 1978-01-17 H & H Licensing Corporation Multi-stage screw-compressor with different tooth profiles
KR19990083482A (en) * 1998-04-27 1999-11-25 이시카와 타다시 Single-stage roots pump and multi-stage roots pump

Also Published As

Publication number Publication date
GB2417757A (en) 2006-03-08

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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)