GB1195361A - Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump - Google Patents

Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump

Info

Publication number
GB1195361A
GB1195361A GB1359566A GB1359566A GB1195361A GB 1195361 A GB1195361 A GB 1195361A GB 1359566 A GB1359566 A GB 1359566A GB 1359566 A GB1359566 A GB 1359566A GB 1195361 A GB1195361 A GB 1195361A
Authority
GB
United Kingdom
Prior art keywords
piston
pump
pipe
oil
vent
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
GB1359566A
Inventor
Michael Henry Cooper
Frank Hewart Latham
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.)
NGN Ltd
Original Assignee
NGN Ltd
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 NGN Ltd filed Critical NGN Ltd
Priority to GB1359566A priority Critical patent/GB1195361A/en
Publication of GB1195361A publication Critical patent/GB1195361A/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
    • 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
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation

Abstract

1,195,361. Rotary vacuum - pumps. N.G.N. Ltd. June 21, 1967 [March 28, 1966], No. 13595/66. Heading F1F. A rotary vacuum-pump 12 immersed in oil has suction pipes 22, 24 connected by a cylinder 20 for a spring-loaded spool-valve-member with a piston 26. When the pump is not operating the valve member abuts a stop 42 and the piston has to the right of a sealing ring 40 in engagement with another sealing ring 38 so as to first shut off the pipe 24 and then admit air above the oil to the pipe 22 through a small vent 34, thus preventing the oil entering the pump and the pipe 24. When pump is in operation an anxiliary vacuum pump 16 partially exhausts a space 21 to shift the valve member to the position shown. Alternatively, the piston may be controlled by either a solenoid energized directly or indirectly by a generator, Fig. 2 (not shown), or a centrifugal governor, Fig. 3 (not shown). As another alternative, the piston 26 is replaced by a piston 64 engaging with a fixed piston 70 with a hollow stem 71 connected to a hydraulic pump 60. When the pump 12 is inoperative air enters the pipe 22 through ports 74, 76, the piston 64 being shifted to the left by hydraulic pressure when the pump is operating. A vent 76 relieves pressure in the stem when the piston moves to the right. To prevent the piston 26 oscillating, the ring 40 may be replaced by two rings with an air vent there between, Fig. 5 (not shown).
GB1359566A 1966-03-28 1966-03-28 Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump Expired GB1195361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1359566A GB1195361A (en) 1966-03-28 1966-03-28 Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1359566A GB1195361A (en) 1966-03-28 1966-03-28 Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump

Publications (1)

Publication Number Publication Date
GB1195361A true GB1195361A (en) 1970-06-17

Family

ID=10025849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1359566A Expired GB1195361A (en) 1966-03-28 1966-03-28 Improvements in and relating to Vacuum Pumping apparatus including a Rotary Vacuum Pump

Country Status (1)

Country Link
GB (1) GB1195361A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289773A1 (en) * 1974-10-31 1976-05-28 Pfeiffer Vakuumtechnik VACUUM PUMP WITH BUILT-IN ISOLATED VALVE
US4483667A (en) * 1981-12-17 1984-11-20 Leybold-Heraeus Gmbh Vacuum pump and method of operating the same
EP0163228A2 (en) * 1984-05-21 1985-12-04 General Signal Corporation Inlet shut-off valve for rotary piston pumps
EP0519880A1 (en) * 1991-06-17 1992-12-23 GALILEO VACUUM TEC S.p.A. Inlet shut-off valve for rotary piston vacuum pump
EP0597732A1 (en) * 1992-11-13 1994-05-18 The BOC Group plc Vacuum pump with inlet oil-controlled valve
DE4443387C1 (en) * 1994-12-06 1996-01-18 Saskia Hochvakuum Und Labortec Twin=step mechanical vacuum pump assembly
DE3152349C2 (en) * 1980-10-10 1996-07-11 Welch Vacuum Technology Inc N Oil-sealed vacuum pump with a suction port valve
CN100360807C (en) * 2003-09-22 2008-01-09 (株)优成真空 Rotary blade vacuum pump
WO2014198524A1 (en) * 2013-06-11 2014-12-18 Oerlikon Leybold Vacuum Gmbh Vacuum pump, and method for operating a vacuum pump

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289773A1 (en) * 1974-10-31 1976-05-28 Pfeiffer Vakuumtechnik VACUUM PUMP WITH BUILT-IN ISOLATED VALVE
DE3152349C2 (en) * 1980-10-10 1996-07-11 Welch Vacuum Technology Inc N Oil-sealed vacuum pump with a suction port valve
US4483667A (en) * 1981-12-17 1984-11-20 Leybold-Heraeus Gmbh Vacuum pump and method of operating the same
EP0163228A2 (en) * 1984-05-21 1985-12-04 General Signal Corporation Inlet shut-off valve for rotary piston pumps
EP0163228A3 (en) * 1984-05-21 1986-03-05 General Signal Corporation Inlet shut-off valve for rotary piston pumps
EP0519880A1 (en) * 1991-06-17 1992-12-23 GALILEO VACUUM TEC S.p.A. Inlet shut-off valve for rotary piston vacuum pump
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
DE4443387C1 (en) * 1994-12-06 1996-01-18 Saskia Hochvakuum Und Labortec Twin=step mechanical vacuum pump assembly
CN100360807C (en) * 2003-09-22 2008-01-09 (株)优成真空 Rotary blade vacuum pump
WO2014198524A1 (en) * 2013-06-11 2014-12-18 Oerlikon Leybold Vacuum Gmbh Vacuum pump, and method for operating a vacuum pump

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees