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GB953799A - Improvements in or relating to mechanical high vacuum pumps of the roots blower type - Google Patents

Improvements in or relating to mechanical high vacuum pumps of the roots blower type

Info

Publication number
GB953799A
GB953799A GB2579260A GB2579260A GB953799A GB 953799 A GB953799 A GB 953799A GB 2579260 A GB2579260 A GB 2579260A GB 2579260 A GB2579260 A GB 2579260A GB 953799 A GB953799 A GB 953799A
Authority
GB
United Kingdom
Prior art keywords
high vacuum
relating
vacuum pumps
roots blower
mechanical high
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
GB2579260A
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of GB953799A publication Critical patent/GB953799A/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
    • 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
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • 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
    • F04C18/126—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 radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

953,799. Rotary pumps. W. C. HERAEUS G.m.b.H. July 25, 1960 [Aug. 11, 1959], No. 25792/60. Drawings to Specification. Heading F1F. A high vacuum pumping system for producing a vacuum below 20 Torr comprises a preliminary pump in series with a Roots pump the rotors of which have a cross-sectional shape which has convexly curved end portions and inter-connecting portions which are not concave i.e. the sides may be parallel or convexly curved giving oval-shaped rotors.
GB2579260A 1959-08-11 1960-07-25 Improvements in or relating to mechanical high vacuum pumps of the roots blower type Expired GB953799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0037148 1959-08-11

Publications (1)

Publication Number Publication Date
GB953799A true GB953799A (en) 1964-04-02

Family

ID=7153236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2579260A Expired GB953799A (en) 1959-08-11 1960-07-25 Improvements in or relating to mechanical high vacuum pumps of the roots blower type

Country Status (2)

Country Link
CH (1) CH389817A (en)
GB (1) GB953799A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208174A (en) * 1987-07-07 1989-03-08 Fuji Heavy Ind Ltd Roots blower
WO2005019652A1 (en) * 2003-08-18 2005-03-03 The Boc Group Plc Reducing exhaust pulsation in dry pumps

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0472751B1 (en) * 1990-08-27 1994-05-18 Leybold Aktiengesellschaft Rotor for a lobe rotor type vacuum pump
DE102006004525A1 (en) * 2006-02-01 2007-08-02 Leybold Vacuum Gmbh Improved efficiency rotary vacuum pump has the inlet time greater than the outlet time to reduce back streaming and increase pumping volume

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208174A (en) * 1987-07-07 1989-03-08 Fuji Heavy Ind Ltd Roots blower
WO2005019652A1 (en) * 2003-08-18 2005-03-03 The Boc Group Plc Reducing exhaust pulsation in dry pumps

Also Published As

Publication number Publication date
CH389817A (en) 1965-03-31

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