GB970900A - Improvements in and relating to rotary vacuum pumps - Google Patents

Improvements in and relating to rotary vacuum pumps

Info

Publication number
GB970900A
GB970900A GB3381762A GB3381762A GB970900A GB 970900 A GB970900 A GB 970900A GB 3381762 A GB3381762 A GB 3381762A GB 3381762 A GB3381762 A GB 3381762A GB 970900 A GB970900 A GB 970900A
Authority
GB
United Kingdom
Prior art keywords
pump
plunger
valve
oil
pressure
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
GB3381762A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3381762A priority Critical patent/GB970900A/en
Publication of GB970900A publication Critical patent/GB970900A/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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Valves (AREA)

Abstract

970,900. Valves. A. S. DARLING. Sept. 4, 1963 [Sept. 4, 1962], No. 33817/62. Heading F2V. [Also in Division F1] A two-stage rotary oil-sealed vacuum pump driven by a spindle 4 and disposed in an oil reservoir 1 supplying sealing and lubricating medium, includes between the space being evacuated and the pump, a spring-loaded, non- return valve 7 having a hollow plunger 16 formed with a head 18 slidable in a bore 14 to which pressure oil is supplied by a pump 6 driven by the spindle 4. When the vacuum pump is operative the plunger is urged upwardly by the pressure oil against its spring and air is sucked by the pump through the valve inlet 11, holes 19 in the plunger and the valve outlet 12. In the event of the vacuum pump being unintentionally or deliberately stopped, oil pressure beneath the head 18 decreases whence the plunger closes on to its seat 20 to isolate the vacuum system from the pump and so prevent oil being sucked into the system. A manuallyadjustable needle valve 9 adjusts the pressure in the bore 14. Instead of the plunger valve 7, a valve coupled to a peripherally mounted spring-loaded diaphragm may be used.
GB3381762A 1962-09-04 1962-09-04 Improvements in and relating to rotary vacuum pumps Expired GB970900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3381762A GB970900A (en) 1962-09-04 1962-09-04 Improvements in and relating to rotary vacuum pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3381762A GB970900A (en) 1962-09-04 1962-09-04 Improvements in and relating to rotary vacuum pumps

Publications (1)

Publication Number Publication Date
GB970900A true GB970900A (en) 1964-09-23

Family

ID=10357843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3381762A Expired GB970900A (en) 1962-09-04 1962-09-04 Improvements in and relating to rotary vacuum pumps

Country Status (1)

Country Link
GB (1) GB970900A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150033A1 (en) * 1981-12-17 1983-07-14 Leybold-Heraeus GmbH, 5000 Köln VACUUM PUMP WITH A SUCTION VALVE AND OPERATING PROCEDURE THEREFOR
EP0277924A2 (en) * 1987-02-04 1988-08-10 GALILEO VACUUM TEC S.p.A. Improvement to the lubrication circuit of rotary vacuum pumps
EP0391064A1 (en) * 1989-04-03 1990-10-10 Dresser Industries, Inc. Intake valve for vacuum compressor
EP0597732A1 (en) * 1992-11-13 1994-05-18 The BOC Group plc Vacuum pump with inlet oil-controlled valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150033A1 (en) * 1981-12-17 1983-07-14 Leybold-Heraeus GmbH, 5000 Köln VACUUM PUMP WITH A SUCTION VALVE AND OPERATING PROCEDURE THEREFOR
US4483667A (en) * 1981-12-17 1984-11-20 Leybold-Heraeus Gmbh Vacuum pump and method of operating the same
EP0277924A2 (en) * 1987-02-04 1988-08-10 GALILEO VACUUM TEC S.p.A. Improvement to the lubrication circuit of rotary vacuum pumps
EP0277924A3 (en) * 1987-02-04 1989-06-07 Officine Galileo S.P.A. Improvement to the lubrication circuit of rotary vacuum pumps
US4844702A (en) * 1987-02-04 1989-07-04 Officine Galileo Spa Lubrication circuit of rotary vacuum pumps
EP0391064A1 (en) * 1989-04-03 1990-10-10 Dresser Industries, Inc. Intake valve for vacuum compressor
EP0597732A1 (en) * 1992-11-13 1994-05-18 The BOC Group plc Vacuum pump with inlet oil-controlled valve
US5419689A (en) * 1992-11-13 1995-05-30 The Boc Group Plc Vacuum pump having oil-actuated inlet valve

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