FR2293609A1 - Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil - Google Patents

Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil

Info

Publication number
FR2293609A1
FR2293609A1 FR7440123A FR7440123A FR2293609A1 FR 2293609 A1 FR2293609 A1 FR 2293609A1 FR 7440123 A FR7440123 A FR 7440123A FR 7440123 A FR7440123 A FR 7440123A FR 2293609 A1 FR2293609 A1 FR 2293609A1
Authority
FR
France
Prior art keywords
vessel
coil
vapour
duct
escaping
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.)
Granted
Application number
FR7440123A
Other languages
French (fr)
Other versions
FR2293609B1 (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.)
VMDI VIDE MOLECULAIRE DANS IND
Original Assignee
VMDI VIDE MOLECULAIRE DANS IND
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 VMDI VIDE MOLECULAIRE DANS IND filed Critical VMDI VIDE MOLECULAIRE DANS IND
Priority to FR7440123A priority Critical patent/FR2293609A1/en
Publication of FR2293609A1 publication Critical patent/FR2293609A1/en
Application granted granted Critical
Publication of FR2293609B1 publication Critical patent/FR2293609B1/fr
Granted 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
    • F04B37/08—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means by condensing or freezing, e.g. cryogenic pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

A double state cryogenic trap located in a duct through which a gas is pumped, has a vessel (22) into which cryogenic liquid such as liquid nitrogen is fed through a connection (24) at the top, with a small bore outlet tube (30) also positioned near the top which passes down between the side of the vessel and the inside of the duct (10), then forms a coil (28) around a horizontal screen (26) under the base of the vessel (22), with a return portion travelling upwards parallel to the beginning of the tube, to discharge to atmosphere through a hole (32) in the duct, above the level of the vessel. The vapour given off by the fluid inside the vessel escapes through the tube and coil thus cooling the screen.
FR7440123A 1974-12-06 1974-12-06 Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil Granted FR2293609A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7440123A FR2293609A1 (en) 1974-12-06 1974-12-06 Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7440123A FR2293609A1 (en) 1974-12-06 1974-12-06 Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil

Publications (2)

Publication Number Publication Date
FR2293609A1 true FR2293609A1 (en) 1976-07-02
FR2293609B1 FR2293609B1 (en) 1977-03-25

Family

ID=9145697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7440123A Granted FR2293609A1 (en) 1974-12-06 1974-12-06 Double stage cryogenic trap - with screen under vessel cooled by vapour from vessel escaping through coil

Country Status (1)

Country Link
FR (1) FR2293609A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071890B (en) * 1959-12-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071890B (en) * 1959-12-24

Also Published As

Publication number Publication date
FR2293609B1 (en) 1977-03-25

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Legal Events

Date Code Title Description
ST Notification of lapse