GB1289905A - - Google Patents

Info

Publication number
GB1289905A
GB1289905A GB1289905DA GB1289905A GB 1289905 A GB1289905 A GB 1289905A GB 1289905D A GB1289905D A GB 1289905DA GB 1289905 A GB1289905 A GB 1289905A
Authority
GB
United Kingdom
Prior art keywords
vapour
oil
april
assembly
jet
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.)
Expired
Application number
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 filed Critical
Publication of GB1289905A publication Critical patent/GB1289905A/en
Expired 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)
  • Jet Pumps And Other Pumps (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

1289905 Vacuum diffusion pumps PRECISION SCIENTIFIC CO 2 April 1970 [4 April 1969] 15587/70 Heading F1E In a vacuum diffusion pump backstreaming of oil vapour molecules is minimized by a topmost jet assembly comprising inner and outer jets formed by caps 48, 62 respectively which direct the oil vapour away from the space to be evacuated in the general direction of an oil sump 24, and which are heated directly by a replaceable resistance heater 78 to reduce condensation of the oil vapour. The inner jet's cap 48 has at least one passageway 60 to permit flow of vapour and is mounted on and spaced by wire spacers 44 from a jet assembly 26 to permit vapour flow. The assembly is heated by conduction from the heater 78 through a plurality of spaced fins 84 connected to a heat cylinder 86 and by radiation therefrom.
GB1289905D 1969-04-04 1970-04-02 Expired GB1289905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81356569A 1969-04-04 1969-04-04

Publications (1)

Publication Number Publication Date
GB1289905A true GB1289905A (en) 1972-09-20

Family

ID=25212752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1289905D Expired GB1289905A (en) 1969-04-04 1970-04-02

Country Status (4)

Country Link
US (1) US3572973A (en)
DE (1) DE1952952A1 (en)
FR (1) FR2041979A5 (en)
GB (1) GB1289905A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4108576A (en) * 1976-07-06 1978-08-22 Varian Associates, Inc. Low cost, thermally efficient diffusion pump
CN113236612A (en) * 2021-05-12 2021-08-10 上海大学 Vacuum diffusion pump capable of regulating and controlling heating power

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840297A (en) * 1953-06-05 1958-06-24 Cons Electrodynamics Corp Vapor operated ejector vacuum pump
US2943783A (en) * 1957-04-01 1960-07-05 Cons Vacuum Corp Heater for a diffusion pump
US3224665A (en) * 1962-01-12 1965-12-21 Milleron Norman Diffusion pump
US3355093A (en) * 1965-03-15 1967-11-28 Bendix Corp Diffusion pump
US3391857A (en) * 1966-09-01 1968-07-09 Atomic Energy Commission Usa Preheater for diffusion pump
US3443743A (en) * 1966-11-15 1969-05-13 Clover Soc Vacuum pumps

Also Published As

Publication number Publication date
DE1952952A1 (en) 1971-03-25
US3572973A (en) 1971-03-30
FR2041979A5 (en) 1971-02-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees