EP0163228A3 - Inlet shut-off valve for rotary piston pumps - Google Patents

Inlet shut-off valve for rotary piston pumps Download PDF

Info

Publication number
EP0163228A3
EP0163228A3 EP85106167A EP85106167A EP0163228A3 EP 0163228 A3 EP0163228 A3 EP 0163228A3 EP 85106167 A EP85106167 A EP 85106167A EP 85106167 A EP85106167 A EP 85106167A EP 0163228 A3 EP0163228 A3 EP 0163228A3
Authority
EP
European Patent Office
Prior art keywords
valve
seal
rotary piston
inlet
inlet shut
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.)
Withdrawn
Application number
EP85106167A
Other languages
German (de)
French (fr)
Other versions
EP0163228A2 (en
Inventor
William T. Lysko
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.)
SPX Corp
Original Assignee
General Signal Corp
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 General Signal Corp filed Critical General Signal Corp
Publication of EP0163228A2 publication Critical patent/EP0163228A2/en
Publication of EP0163228A3 publication Critical patent/EP0163228A3/en
Withdrawn legal-status Critical Current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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/021—Control systems for the circulation of the lubricant

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

A shaft lip sealed is provided as an inlet shut-off valve seal in the working fluid inlet line of a rotary piston pump between the first pumping chamber of the vacuum pump and the inlet to the operating chamber. A piston valve is provided, having an axially inclined radial face, for engaging this seal and cutting off flow therebetween even under low pressures. This piston valve is actuated into sealing engage­ ment with the shaft lip seal when operation of the vacuum pump ceases and a pressure relief vent is connected to the first pumping chamber.
EP85106167A 1984-05-21 1985-05-20 Inlet shut-off valve for rotary piston pumps Withdrawn EP0163228A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61260084A 1984-05-21 1984-05-21
US612600 1984-05-21

Publications (2)

Publication Number Publication Date
EP0163228A2 EP0163228A2 (en) 1985-12-04
EP0163228A3 true EP0163228A3 (en) 1986-03-05

Family

ID=24453849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106167A Withdrawn EP0163228A3 (en) 1984-05-21 1985-05-20 Inlet shut-off valve for rotary piston pumps

Country Status (2)

Country Link
EP (1) EP0163228A3 (en)
JP (1) JPS60249691A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1246969B (en) * 1991-06-17 1994-12-01 Galileo Vacuum Tec Spa ROTARY PUMP FOR VACUUM, WITH AUTOMATIC CONTROL SHUTTER FOR INSULATION OF THE UNDER-VACUUM ENVIRONMENT.
DE4325281A1 (en) * 1993-07-28 1995-02-02 Leybold Ag Vacuum pump with a gas ballast device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406897A (en) * 1966-07-18 1968-10-22 Leybold Holding Ag Mechanical vacuum pump
CH476921A (en) * 1967-09-21 1969-08-15 Edwards High Vacuum Int Ltd Multi-stage rotary vacuum pump
GB1195361A (en) * 1966-03-28 1970-06-17 N G N Ltd Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump
GB1323780A (en) * 1971-02-11 1973-07-18 Ingersoll Rand Co Fluid supply and control sub-system
GB1481748A (en) * 1974-10-31 1977-08-03 Pfeiffer Vakuumtechnik Vacuum pumps
DD131487A1 (en) * 1977-06-24 1978-06-28 Juergen Kaunert SHUT-OFF VALVE WITH AUTOMATIC VENTILATION DEVICE FOR VACUUM PUMPS
DD205219A1 (en) * 1981-10-15 1983-12-21 Pumpen U Verdichter Wissenscha HYDRAULIC MECHANICAL PROTECTION DEVICE FOR PUMPS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1195361A (en) * 1966-03-28 1970-06-17 N G N Ltd Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump
US3406897A (en) * 1966-07-18 1968-10-22 Leybold Holding Ag Mechanical vacuum pump
CH476921A (en) * 1967-09-21 1969-08-15 Edwards High Vacuum Int Ltd Multi-stage rotary vacuum pump
GB1323780A (en) * 1971-02-11 1973-07-18 Ingersoll Rand Co Fluid supply and control sub-system
GB1481748A (en) * 1974-10-31 1977-08-03 Pfeiffer Vakuumtechnik Vacuum pumps
DD131487A1 (en) * 1977-06-24 1978-06-28 Juergen Kaunert SHUT-OFF VALVE WITH AUTOMATIC VENTILATION DEVICE FOR VACUUM PUMPS
DD205219A1 (en) * 1981-10-15 1983-12-21 Pumpen U Verdichter Wissenscha HYDRAULIC MECHANICAL PROTECTION DEVICE FOR PUMPS

Also Published As

Publication number Publication date
JPS60249691A (en) 1985-12-10
EP0163228A2 (en) 1985-12-04

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB IT

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Effective date: 19860807

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Effective date: 19870902

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19871130

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LYSKO, WILLIAM T.