EP0793019A3 - Improvements in vacuum pumps - Google Patents

Improvements in vacuum pumps Download PDF

Info

Publication number
EP0793019A3
EP0793019A3 EP97301303A EP97301303A EP0793019A3 EP 0793019 A3 EP0793019 A3 EP 0793019A3 EP 97301303 A EP97301303 A EP 97301303A EP 97301303 A EP97301303 A EP 97301303A EP 0793019 A3 EP0793019 A3 EP 0793019A3
Authority
EP
European Patent Office
Prior art keywords
pump
stages
vacuum pumps
effected
counter
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Withdrawn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
EP97301303A
Other languages
German (de)
French (fr)
Other versions
EP0793019A2 (en
Inventor
Ian Stones
Nigel Paul Schofield
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.)
BOC Group Ltd
Original Assignee
BOC Group 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 BOC Group Ltd filed Critical BOC Group Ltd
Publication of EP0793019A2 publication Critical patent/EP0793019A2/en
Publication of EP0793019A3 publication Critical patent/EP0793019A3/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Withdrawn legal-status Critical Current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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B25/00—Multi-stage pumps
    • F04B25/02—Multi-stage pumps of stepped piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum

Abstract

A vacuum pump which comprises a multi-stage reciprocating piston mode of operation in which piston reciprocation is effected by electromagnetic drive means and a counter-acting spring means and in which the pump stages are connected in series between a pump inlet and a pump outlet such that, in use, gas being transferred through the pump passes through the stages in turn.
EP97301303A 1996-03-01 1997-02-27 Improvements in vacuum pumps Withdrawn EP0793019A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9604645 1996-03-01
GBGB9604645.3A GB9604645D0 (en) 1996-03-01 1996-03-01 Improvements in vacuum pumps

Publications (2)

Publication Number Publication Date
EP0793019A2 EP0793019A2 (en) 1997-09-03
EP0793019A3 true EP0793019A3 (en) 1999-06-02

Family

ID=10789859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97301303A Withdrawn EP0793019A3 (en) 1996-03-01 1997-02-27 Improvements in vacuum pumps

Country Status (3)

Country Link
EP (1) EP0793019A3 (en)
JP (1) JPH102281A (en)
GB (1) GB9604645D0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9227000B2 (en) 2006-09-28 2016-01-05 Smith & Nephew, Inc. Portable wound therapy system
US9387126B2 (en) 2002-10-28 2016-07-12 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
US9452248B2 (en) 2003-10-28 2016-09-27 Smith & Nephew Plc Wound cleansing apparatus in-situ

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0008281D0 (en) 2000-04-04 2000-05-24 Boc Group Plc Improvements in reciprocating machines
US20070224058A1 (en) * 2006-03-24 2007-09-27 Ingersoll-Rand Company Linear compressor assembly
EP3360519B1 (en) 2007-11-21 2020-11-18 Smith & Nephew plc Wound dressing
GB201011173D0 (en) 2010-07-02 2010-08-18 Smith & Nephew Provision of wound filler
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
GB201020005D0 (en) 2010-11-25 2011-01-12 Smith & Nephew Composition 1-1
CN103403095B (en) 2010-11-25 2016-12-14 史密夫及内修公开有限公司 Compositions I II and products thereof and purposes
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
US20150159066A1 (en) 2011-11-25 2015-06-11 Smith & Nephew Plc Composition, apparatus, kit and method and uses thereof
CA2867969C (en) 2012-03-20 2020-03-24 Smith & Nephew Plc Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US20160120706A1 (en) 2013-03-15 2016-05-05 Smith & Nephew Plc Wound dressing sealant and use thereof
EP3237032A2 (en) 2014-12-22 2017-11-01 Smith & Nephew PLC Negative pressure wound therapy apparatus and methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715102A1 (en) * 1977-04-04 1978-10-12 Syndicat Des Coproprietaires D Two stage high pressure compressor - has stepped free piston with spring assisted linear electric motor drive
GB2040361A (en) * 1978-12-22 1980-08-28 Pierburg Gmbh & Co Kg Double-acting vacuum pump
US4699572A (en) * 1981-08-13 1987-10-13 Commonwealth Scientific And Industrial Research Organization Reciprocatory piston and cylinder machine
JPS6419189A (en) * 1987-07-14 1989-01-23 Nagano Keiki Seisakusho Kk Vacuum pump
US4832578A (en) * 1986-11-14 1989-05-23 The B.F. Goodrich Company Multi-stage compressor
US4954047A (en) * 1988-10-08 1990-09-04 Toyo Engineering Corporation Evacuation apparatus
FR2666853A1 (en) * 1990-09-19 1992-03-20 Toyo Engineering Corp Vacuum pump and pumping system comprising at least one such pump
WO1993001411A1 (en) * 1991-07-10 1993-01-21 Chen, Chongyuan Sleeve piston pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715102A1 (en) * 1977-04-04 1978-10-12 Syndicat Des Coproprietaires D Two stage high pressure compressor - has stepped free piston with spring assisted linear electric motor drive
GB2040361A (en) * 1978-12-22 1980-08-28 Pierburg Gmbh & Co Kg Double-acting vacuum pump
US4699572A (en) * 1981-08-13 1987-10-13 Commonwealth Scientific And Industrial Research Organization Reciprocatory piston and cylinder machine
US4832578A (en) * 1986-11-14 1989-05-23 The B.F. Goodrich Company Multi-stage compressor
JPS6419189A (en) * 1987-07-14 1989-01-23 Nagano Keiki Seisakusho Kk Vacuum pump
US4954047A (en) * 1988-10-08 1990-09-04 Toyo Engineering Corporation Evacuation apparatus
FR2666853A1 (en) * 1990-09-19 1992-03-20 Toyo Engineering Corp Vacuum pump and pumping system comprising at least one such pump
WO1993001411A1 (en) * 1991-07-10 1993-01-21 Chen, Chongyuan Sleeve piston pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 194 (M - 823) 10 May 1989 (1989-05-10) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9387126B2 (en) 2002-10-28 2016-07-12 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US9452248B2 (en) 2003-10-28 2016-09-27 Smith & Nephew Plc Wound cleansing apparatus in-situ
US9227000B2 (en) 2006-09-28 2016-01-05 Smith & Nephew, Inc. Portable wound therapy system
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus

Also Published As

Publication number Publication date
EP0793019A2 (en) 1997-09-03
GB9604645D0 (en) 1996-05-01
JPH102281A (en) 1998-01-06

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