GB772999A - Improvements in or relating to roots-type mechanical high-vacuum pumps - Google Patents

Improvements in or relating to roots-type mechanical high-vacuum pumps

Info

Publication number
GB772999A
GB772999A GB27370/55A GB2737055A GB772999A GB 772999 A GB772999 A GB 772999A GB 27370/55 A GB27370/55 A GB 27370/55A GB 2737055 A GB2737055 A GB 2737055A GB 772999 A GB772999 A GB 772999A
Authority
GB
United Kingdom
Prior art keywords
pump
roots
chamber
relating
vacuum pumps
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
GB27370/55A
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 GB772999A publication Critical patent/GB772999A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08Rotary-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
    • F04C18/12Rotary-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
    • F04C18/126Rotary-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

772,999. Rotary pumps. HERAEUS, GES., W. C. Sept. 26, 1955 [Sept. 24, 1954], No. 27370/55. Class 110 (2). In a vacuum pump of the Roots' blower type the rotors 3a, 3b and the stationary shafts 6a, 6b are each provided with passages as shown, whereby the air gap in the contact zone of the rotors may periodically communicate with a chamber of low pressure relative to the delivery side of the pump-such as the scoop chamber 9. Several such pressure equalizing passages may be provided for each rotor. The driving motor (not shown) for the pump may also be enclosed within the pump casing which comprises inner and outer walls 1, 2 defining a chamber 11 therebetween which communicates with the inlet side of the pump.
GB27370/55A 1954-09-24 1955-09-26 Improvements in or relating to roots-type mechanical high-vacuum pumps Expired GB772999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE772999X 1954-09-24

Publications (1)

Publication Number Publication Date
GB772999A true GB772999A (en) 1957-04-17

Family

ID=6683048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27370/55A Expired GB772999A (en) 1954-09-24 1955-09-26 Improvements in or relating to roots-type mechanical high-vacuum pumps

Country Status (1)

Country Link
GB (1) GB772999A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527292A1 (en) * 1985-07-30 1987-02-12 Aerzener Maschf Gmbh METHOD FOR COMPRESSING GAS SHAPED CONVEYOR MEDIUM AND ROOTS COMPRESSOR FOR CARRYING OUT THE METHOD
WO2019171074A1 (en) * 2018-03-09 2019-09-12 Edwards Limited A vacuum pump with a pressure relief valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527292A1 (en) * 1985-07-30 1987-02-12 Aerzener Maschf Gmbh METHOD FOR COMPRESSING GAS SHAPED CONVEYOR MEDIUM AND ROOTS COMPRESSOR FOR CARRYING OUT THE METHOD
WO2019171074A1 (en) * 2018-03-09 2019-09-12 Edwards Limited A vacuum pump with a pressure relief valve

Similar Documents

Publication Publication Date Title
GB1473374A (en) Turbomolecular vacuum pump
GB809445A (en) Improvements in or relating to rotary high vacuum pumps
GB1515138A (en) Rotary positive-displacement fluid machine
EP1274942B8 (en) Vacuum pump with two co-operating rotors
GB1454014A (en) Rotary sliding vane pump
GB809443A (en) Improvements in or relating to rotary high-vacuum pumps
GB772999A (en) Improvements in or relating to roots-type mechanical high-vacuum pumps
GB625490A (en) Improvements in or relating to pumps of the rotary displacement type
GB1136129A (en) Improvements in or relating to rotary pumps and motors
ES417637A1 (en) Positive displacement machine such as a pump
GB1055517A (en) Improvements in and relating to gear pumps
GB885954A (en) Improvements in or relating to molecular pumps
GB871822A (en) Improvements in or relating to rotary compressors
GB1355727A (en) Pump units for the multistage compression of gases
GB670395A (en) Improvements in or relating to rotary screw-pumps and motors
GB782955A (en) Improvements in and relating to root's blowers
GB587849A (en) Improvements in and relating to rotary pumps, compressors and motors
GB848760A (en) Improvements in or relating to vaned rotary pumps and/or motors
SU383882A1 (en) ROTARY VACUUM PUMP COMPRESSOR
SU584094A1 (en) Fluid-ring machine
GB790799A (en) Improvements in or relating to multi-stage rotary vacuum pumps
GB796924A (en) Improvements in or relating to rotary pumps
GB953799A (en) Improvements in or relating to mechanical high vacuum pumps of the roots blower type
GB971557A (en) Improvements in or relating to rotary engines
GB616173A (en) An improved diaphragm type compressor