GB2192676B - A magnetic fluid seal apparatus - Google Patents

A magnetic fluid seal apparatus

Info

Publication number
GB2192676B
GB2192676B GB8714376A GB8714376A GB2192676B GB 2192676 B GB2192676 B GB 2192676B GB 8714376 A GB8714376 A GB 8714376A GB 8714376 A GB8714376 A GB 8714376A GB 2192676 B GB2192676 B GB 2192676B
Authority
GB
United Kingdom
Prior art keywords
magnetic fluid
fluid seal
seal apparatus
magnetic
seal
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
GB8714376A
Other languages
English (en)
Other versions
GB2192676A (en
GB8714376D0 (en
Inventor
Heinrich Cap
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.)
Ebm Papst St Georgen GmbH and Co KG
Original Assignee
Papst Motoren GmbH and Co KG
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 Papst Motoren GmbH and Co KG filed Critical Papst Motoren GmbH and Co KG
Publication of GB8714376D0 publication Critical patent/GB8714376D0/en
Publication of GB2192676A publication Critical patent/GB2192676A/en
Priority to GB9027376A priority Critical patent/GB2236363B/en
Application granted granted Critical
Publication of GB2192676B publication Critical patent/GB2192676B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
GB8714376A 1986-06-24 1987-06-19 A magnetic fluid seal apparatus Expired - Fee Related GB2192676B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9027376A GB2236363B (en) 1986-06-24 1990-12-18 Magnetic fluid seal apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH253886A CH676740A5 (fr) 1986-06-24 1986-06-24

Publications (3)

Publication Number Publication Date
GB8714376D0 GB8714376D0 (en) 1987-07-22
GB2192676A GB2192676A (en) 1988-01-20
GB2192676B true GB2192676B (en) 1991-07-31

Family

ID=4236046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8714376A Expired - Fee Related GB2192676B (en) 1986-06-24 1987-06-19 A magnetic fluid seal apparatus

Country Status (3)

Country Link
CH (1) CH676740A5 (fr)
DE (2) DE3720024A1 (fr)
GB (1) GB2192676B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3924434A1 (de) * 1989-07-24 1991-01-31 Freudenberg Carl Fa Ferrofluid-dichtung
DE4411367A1 (de) * 1994-03-31 1995-10-05 Burgmann Dichtungswerk Feodor Spalttopfgedichtete magnetische Antriebseinrichtung
DE102014014770B4 (de) * 2014-10-10 2016-10-27 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit einem Stator und Rotor
DE102019218446A1 (de) * 2019-11-28 2021-06-02 Volkswagen Aktiengesellschaft Elektromaschine mit reibungsarmer Luftspaltabdichtung und Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB680233A (en) * 1948-12-23 1952-10-01 Adolph Razdowitz Improvements in or relating to sealing devices for joints
GB2104165A (en) * 1981-06-15 1983-03-02 Rigaku Denki Co Ltd Magnetic fluid sealing device
GB2130662A (en) * 1982-09-16 1984-06-06 Rigaku Keisoku Kk Magnetic fluid sealing device
EP0182656A2 (fr) * 1984-11-20 1986-05-28 Ferrofluidics Corporation Appareil et procédé d'étanchéité ferrofluidique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526380A (en) * 1984-01-27 1985-07-02 Ferrofluidics Corporation Single pole piece multiple-stage ferrofluid seal apparatus
US4526382A (en) * 1984-05-03 1985-07-02 Ferrofluidics Corporation Radially polarized multiple-stage ferrofluid seal apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB680233A (en) * 1948-12-23 1952-10-01 Adolph Razdowitz Improvements in or relating to sealing devices for joints
GB2104165A (en) * 1981-06-15 1983-03-02 Rigaku Denki Co Ltd Magnetic fluid sealing device
GB2130662A (en) * 1982-09-16 1984-06-06 Rigaku Keisoku Kk Magnetic fluid sealing device
EP0182656A2 (fr) * 1984-11-20 1986-05-28 Ferrofluidics Corporation Appareil et procédé d'étanchéité ferrofluidique

Also Published As

Publication number Publication date
DE3720024A1 (de) 1988-01-07
DE8708440U1 (de) 1987-09-03
CH676740A5 (fr) 1991-02-28
GB2192676A (en) 1988-01-20
GB8714376D0 (en) 1987-07-22

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000619