DE3726683C2 - - Google Patents

Info

Publication number
DE3726683C2
DE3726683C2 DE19873726683 DE3726683A DE3726683C2 DE 3726683 C2 DE3726683 C2 DE 3726683C2 DE 19873726683 DE19873726683 DE 19873726683 DE 3726683 A DE3726683 A DE 3726683A DE 3726683 C2 DE3726683 C2 DE 3726683C2
Authority
DE
Germany
Prior art keywords
control
pump chamber
roots
opening
vacuum 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.)
Expired - Fee Related
Application number
DE19873726683
Other languages
German (de)
English (en)
Other versions
DE3726683A1 (de
Inventor
Werner 7860 Schopfheim De Rietschle
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.)
Werner Rietschle Maschinen- und Apparatebau 7860 Schopfheim De GmbH
Original Assignee
Werner Rietschle Maschinen- und Apparatebau 7860 Schopfheim De GmbH
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 Werner Rietschle Maschinen- und Apparatebau 7860 Schopfheim De GmbH filed Critical Werner Rietschle Maschinen- und Apparatebau 7860 Schopfheim De GmbH
Priority to DE19873726683 priority Critical patent/DE3726683A1/de
Priority to DE8809980U priority patent/DE8809980U1/de
Publication of DE3726683A1 publication Critical patent/DE3726683A1/de
Application granted granted Critical
Publication of DE3726683C2 publication Critical patent/DE3726683C2/de
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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
DE19873726683 1987-08-11 1987-08-11 Waelzkolben-vakuumpumpe Granted DE3726683A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873726683 DE3726683A1 (de) 1987-08-11 1987-08-11 Waelzkolben-vakuumpumpe
DE8809980U DE8809980U1 (de) 1987-08-11 1988-08-04 Wälzkolben-Vakuumpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873726683 DE3726683A1 (de) 1987-08-11 1987-08-11 Waelzkolben-vakuumpumpe

Publications (2)

Publication Number Publication Date
DE3726683A1 DE3726683A1 (de) 1989-02-23
DE3726683C2 true DE3726683C2 (enrdf_load_stackoverflow) 1991-06-13

Family

ID=6333515

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873726683 Granted DE3726683A1 (de) 1987-08-11 1987-08-11 Waelzkolben-vakuumpumpe

Country Status (1)

Country Link
DE (1) DE3726683A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036698A1 (de) * 1990-11-17 1992-05-21 Pfeiffer Vakuumtechnik Verfahren zum betrieb einer waelzkolbenpumpe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489887A (en) * 1946-07-11 1949-11-29 Roots Connersville Blower Corp Rotary pump
JPS51133811A (en) * 1975-04-16 1976-11-19 Borg Warner Rotary compressors

Also Published As

Publication number Publication date
DE3726683A1 (de) 1989-02-23

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee