ATE32253T1 - Ferrofluidabdichtung und verfahren zu deren herstellung. - Google Patents

Ferrofluidabdichtung und verfahren zu deren herstellung.

Info

Publication number
ATE32253T1
ATE32253T1 AT83307451T AT83307451T ATE32253T1 AT E32253 T1 ATE32253 T1 AT E32253T1 AT 83307451 T AT83307451 T AT 83307451T AT 83307451 T AT83307451 T AT 83307451T AT E32253 T1 ATE32253 T1 AT E32253T1
Authority
AT
Austria
Prior art keywords
ferrofluid
pole piece
shaft
shaft element
radial gap
Prior art date
Application number
AT83307451T
Other languages
English (en)
Inventor
Kuldip Raj
Raoul Casciari
Original Assignee
Ferrofluidics 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 Ferrofluidics Corp filed Critical Ferrofluidics Corp
Application granted granted Critical
Publication of ATE32253T1 publication Critical patent/ATE32253T1/de

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)
  • Mechanical Sealing (AREA)
AT83307451T 1982-12-16 1983-12-07 Ferrofluidabdichtung und verfahren zu deren herstellung. ATE32253T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/450,339 US4407508A (en) 1982-12-16 1982-12-16 Single-pole-piece ferrofluid seal apparatus and exclusion seal system
EP83307451A EP0112121B1 (de) 1982-12-16 1983-12-07 Ferrofluidabdichtung und Verfahren zu deren Herstellung

Publications (1)

Publication Number Publication Date
ATE32253T1 true ATE32253T1 (de) 1988-02-15

Family

ID=23787707

Family Applications (1)

Application Number Title Priority Date Filing Date
AT83307451T ATE32253T1 (de) 1982-12-16 1983-12-07 Ferrofluidabdichtung und verfahren zu deren herstellung.

Country Status (6)

Country Link
US (1) US4407508A (de)
EP (1) EP0112121B1 (de)
JP (1) JPS59110961A (de)
AT (1) ATE32253T1 (de)
CA (1) CA1239161A (de)
DE (1) DE3375501D1 (de)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489950A (en) * 1983-05-25 1984-12-25 Ferrofluidics Corporation Ferrofluid-pole-piece-magnet apparatus
US4628384A (en) * 1983-08-26 1986-12-09 Ferrofluidics Corporation Bearing assembly with integrated ferrofluid seal
US4630943A (en) * 1983-10-27 1986-12-23 Ferrofluidics Corporation Ferrofluid bearing and seal apparatus
US4531846A (en) * 1983-12-27 1985-07-30 Ferrofluidics Corporation Compact ferrofluid seal and bearing assembly
US4526380A (en) * 1984-01-27 1985-07-02 Ferrofluidics Corporation Single pole piece multiple-stage ferrofluid seal apparatus
US4734606A (en) * 1985-11-20 1988-03-29 Hajec Chester S Electric motor with ferrofluid bearing
US4797013A (en) * 1987-02-09 1989-01-10 Ferrofluidics Corporation Compact ferrofluidic electrically conducting sealed bearing
US4898480A (en) * 1987-02-09 1990-02-06 Ferrofluidics Corporation Compact ferrofluidic electrically conducting sealed bearing
US4824122A (en) * 1987-03-02 1989-04-25 Ferrofluidics Corporation Compact magnetic fluid low pressure seal
US4830384A (en) * 1987-06-29 1989-05-16 Ferrofluidics Corporation Compact long-life magnetic fluid seal
JPH0713425Y2 (ja) * 1988-07-11 1995-03-29 日本電産株式会社 スピンドルモータ
US4927164A (en) * 1988-08-08 1990-05-22 Ferrofluidics Corporation Ferrofluid seal with epoxy pole pieces
US5161902A (en) * 1988-09-29 1992-11-10 Nippon Seiko Kabushiki Kaisha Magnetic sealing device for use between first and second magnetic members which rotate relative to each other
US4995622A (en) * 1989-02-07 1991-02-26 Nippon Pillar Packing Co., Ltd. Magnetic fluid seal device
US5018751A (en) * 1989-06-28 1991-05-28 Ferrofluidics Corporation Stacked pole-piece ferrofluid seal apparatus
US5007513A (en) * 1990-04-03 1991-04-16 Lord Corporation Electroactive fluid torque transmission apparatus with ferrofluid seal
DE69425119T2 (de) * 1993-12-14 2001-02-15 Hitachi, Ltd. Aufzeichnungsplattengerät und rotierende Halterungsstruktur dafür
US5973878A (en) * 1993-12-14 1999-10-26 Hitachi, Ltd. Recording disk apparatus and rotational supporting structure therefor, having a magnetic lubricant seal which is inclined
JPH07217747A (ja) * 1994-01-31 1995-08-15 Nok Corp 磁性流体シール装置
US5660397A (en) * 1994-09-23 1997-08-26 Holtkamp; William H. Devices employing a liquid-free medium
US5954342A (en) * 1997-04-25 1999-09-21 Mfs Technology Ltd Magnetic fluid seal apparatus for a rotary shaft
JP2001178076A (ja) * 1999-10-07 2001-06-29 Nippon Densan Corp 流体シールおよびこれを用いたスピンドルモータ、並びにこのスピンドルモータを用いたディスク装置
US7048520B1 (en) 2002-04-16 2006-05-23 Mccarthy James Multistage sealed coolant pump
US6899338B2 (en) * 2003-03-06 2005-05-31 Ferrotec Usa Corporation Ferrofluid seal incorporating multiple types of ferrofluid
US8012079B2 (en) 2004-08-13 2011-09-06 Procyrion, Inc. Method and apparatus for long-term assisting a left ventricle to pump blood
US7291287B2 (en) * 2005-05-25 2007-11-06 Ferrolabs, Inc. Method of making magnetic fluid
JP4885490B2 (ja) * 2005-06-30 2012-02-29 株式会社リガク 磁性流体シール装置
US7129609B1 (en) 2005-08-30 2006-10-31 Ferrolabs, Inc. Magneto-fluidic seal with wide working temperature range
US7758320B2 (en) 2007-05-03 2010-07-20 Tank, Inc. Two-stage hydrodynamic pump and method
CN101776149A (zh) * 2010-03-01 2010-07-14 北京交通大学 低温小直径磁性液体密封装置
JP6231355B2 (ja) 2013-11-06 2017-11-15 グローブライド株式会社 磁性流体シール付き軸受、及び磁性流体シール付き軸受を配設した魚釣用リール
ES2959221T3 (es) 2015-09-25 2024-02-21 Procyrion Inc Bomba de sangre intravascular no oclusiva que proporciona hemólisis reducida
US10443738B2 (en) * 2016-06-17 2019-10-15 Procyrion, Inc. Magnetic fluid seal for implantable devices
CN115279448A (zh) 2019-12-03 2022-11-01 普罗西里翁公司 血泵
WO2021119413A1 (en) 2019-12-13 2021-06-17 Procyrion, Inc. Support structures for intravascular blood pumps
CN111981134B (zh) * 2020-08-19 2022-05-03 黑龙江工程学院 一种磁性流体动密封装置及磁性流体的制备方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996162A (en) * 1958-04-07 1961-08-15 Henry C Lehde Devices for excluding magnetic particles from seals and bearings
GB1292338A (en) * 1968-10-28 1972-10-11 Karl-Heinz Steigwald Sealing means
US3620584A (en) * 1970-05-25 1971-11-16 Ferrofluidics Corp Magnetic fluid seals
US4171818A (en) * 1977-04-04 1979-10-23 Ferrofluidics Corporation Dynamic lip seal using ferrofluids as sealant/lubricant
SU655858A1 (ru) * 1977-11-01 1979-04-05 Ивановский энергетический институт им. В.И.Ленина Уплотнительно-опорный узел вала
JPS54108161A (en) * 1978-02-14 1979-08-24 Mitsubishi Electric Corp Magnetic fluid seal
SU781469A1 (ru) * 1979-04-10 1980-11-23 Ивановский энергетический институт им.В.И.Ленина Уплотнительно-опорный узел вала
US4335885A (en) * 1980-08-19 1982-06-22 Mechanical Technology Incorporated Plural fluid magnetic/centrifugal seal
US4357023A (en) * 1980-11-19 1982-11-02 Ferrofluidics Corporation Ferrofluid rotary-shaft seal apparatus and method

Also Published As

Publication number Publication date
DE3375501D1 (en) 1988-03-03
EP0112121A3 (en) 1985-01-16
JPS59110961A (ja) 1984-06-27
EP0112121B1 (de) 1988-01-27
US4407508A (en) 1983-10-04
EP0112121A2 (de) 1984-06-27
CA1239161A (en) 1988-07-12

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties