EP0806572A3 - Improvements in diffusion pumps - Google Patents

Improvements in diffusion pumps Download PDF

Info

Publication number
EP0806572A3
EP0806572A3 EP97302923A EP97302923A EP0806572A3 EP 0806572 A3 EP0806572 A3 EP 0806572A3 EP 97302923 A EP97302923 A EP 97302923A EP 97302923 A EP97302923 A EP 97302923A EP 0806572 A3 EP0806572 A3 EP 0806572A3
Authority
EP
European Patent Office
Prior art keywords
diffusion pumps
outer body
hollow outer
wicking material
diffusion 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Withdrawn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
EP97302923A
Other languages
German (de)
French (fr)
Other versions
EP0806572A2 (en
Inventor
Graeme Huntley
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 EP0806572A2 publication Critical patent/EP0806572A2/en
Publication of EP0806572A3 publication Critical patent/EP0806572A3/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Withdrawn legal-status Critical Current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
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F9/00—Diffusion pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A diffusion pump 1 comprises a hollow outer body 2 containing a vapour chimney 8 with at least one jet stage 12. At least a portion of the internal surface of the hollow outer body 2 is covered with a wicking material 20 for absorbing a working fluid. The use of the wicking material 20 allows the diffusion pump to be used in orientations other than the conventional upright configuration.
EP97302923A 1996-05-07 1997-04-29 Improvements in diffusion pumps Withdrawn EP0806572A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9609467.7A GB9609467D0 (en) 1996-05-07 1996-05-07 Improvements in diffusion pumps
GB9609467 1996-05-07

Publications (2)

Publication Number Publication Date
EP0806572A2 EP0806572A2 (en) 1997-11-12
EP0806572A3 true EP0806572A3 (en) 1998-06-17

Family

ID=10793279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97302923A Withdrawn EP0806572A3 (en) 1996-05-07 1997-04-29 Improvements in diffusion pumps

Country Status (3)

Country Link
EP (1) EP0806572A3 (en)
JP (1) JPH1073100A (en)
GB (1) GB9609467D0 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448750A (en) * 1973-12-28 1976-09-08 Boc International Ltd Vacuum vapour pumps
SU985415A1 (en) * 1980-11-05 1982-12-30 Предприятие П/Я А-3634 Cooled trap
SU1576737A1 (en) * 1988-09-27 1990-07-07 Предприятие П/Я А-3605 Adsorbing trap

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448750A (en) * 1973-12-28 1976-09-08 Boc International Ltd Vacuum vapour pumps
SU985415A1 (en) * 1980-11-05 1982-12-30 Предприятие П/Я А-3634 Cooled trap
SU1576737A1 (en) * 1988-09-27 1990-07-07 Предприятие П/Я А-3605 Adsorbing trap

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 8344, Derwent World Patents Index; AN 83-806362, XP002063319 *
DATABASE WPI Week 9111, Derwent World Patents Index; AN 91-079415, XP002063320 *

Also Published As

Publication number Publication date
GB9609467D0 (en) 1996-07-10
EP0806572A2 (en) 1997-11-12
JPH1073100A (en) 1998-03-17

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