GB2363434B - Ferrofluidic seal between a shaft and a hub for a disk hard drive - Google Patents

Ferrofluidic seal between a shaft and a hub for a disk hard drive

Info

Publication number
GB2363434B
GB2363434B GB0119187A GB0119187A GB2363434B GB 2363434 B GB2363434 B GB 2363434B GB 0119187 A GB0119187 A GB 0119187A GB 0119187 A GB0119187 A GB 0119187A GB 2363434 B GB2363434 B GB 2363434B
Authority
GB
United Kingdom
Prior art keywords
hub
shaft
hard drive
disk hard
ferrofluidic 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
GB0119187A
Other versions
GB2363434A (en
GB0119187D0 (en
Inventor
Donald James Macleod
Robert Michael Pelstring
Marten Fredrick Byl
Jeffry Arnold Leblanc
Tan Hung Pham
Robert Alan Nottingham
Michael James Whittome
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB0119187D0 publication Critical patent/GB0119187D0/en
Publication of GB2363434A publication Critical patent/GB2363434A/en
Application granted granted Critical
Publication of GB2363434B publication Critical patent/GB2363434B/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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
GB0119187A 1999-01-22 2000-01-21 Ferrofluidic seal between a shaft and a hub for a disk hard drive Expired - Fee Related GB2363434B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11675899P 1999-01-22 1999-01-22
US11782699P 1999-01-29 1999-01-29
US12167899P 1999-02-25 1999-02-25
US12462999P 1999-03-16 1999-03-16
PCT/US2000/001567 WO2000043698A1 (en) 1999-01-22 2000-01-21 Ferrofluidic seal between a shaft and a hub for a disk hard drive

Publications (3)

Publication Number Publication Date
GB0119187D0 GB0119187D0 (en) 2001-09-26
GB2363434A GB2363434A (en) 2001-12-19
GB2363434B true GB2363434B (en) 2002-10-23

Family

ID=27494102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0119187A Expired - Fee Related GB2363434B (en) 1999-01-22 2000-01-21 Ferrofluidic seal between a shaft and a hub for a disk hard drive

Country Status (6)

Country Link
JP (1) JP2003526761A (en)
KR (1) KR100648748B1 (en)
DE (1) DE10083894T1 (en)
GB (1) GB2363434B (en)
HK (1) HK1042936A1 (en)
WO (1) WO2000043698A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004011899A (en) * 2002-06-11 2004-01-15 National Institute For Materials Science Magnetic fluid sealed rotary shaft mechanism
WO2012105301A1 (en) * 2011-02-03 2012-08-09 イーグル工業株式会社 Magnetic fluid seal
KR102599972B1 (en) * 2016-07-21 2023-11-09 엘지이노텍 주식회사 Fan motor and vehicle having the same
JP7133263B2 (en) * 2017-09-29 2022-09-08 グローブライド株式会社 Magnetic fluid seal device and bearing with magnetic fluid seal

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171818A (en) * 1977-04-04 1979-10-23 Ferrofluidics Corporation Dynamic lip seal using ferrofluids as sealant/lubricant
US4357024A (en) * 1980-11-19 1982-11-02 Ferrofluidics Corporation Ferrofluid rotary-shaft seal apparatus and method
US4444398A (en) * 1983-02-22 1984-04-24 Ferrofluidics Corporation Self-activating ferrofluid seal apparatus and method
US4478424A (en) * 1984-01-27 1984-10-23 Ferrofluidics Corporation Ferrofluid seal apparatus and method
US4506895A (en) * 1984-08-29 1985-03-26 Ferrofluidics Corporation Self-activating ferrofluid seal apparatus and method of use
US4604229A (en) * 1985-03-20 1986-08-05 Ferrofluidics Corporation Electrically conductive ferrofluid compositions and method of preparing and using same
US5018751A (en) * 1989-06-28 1991-05-28 Ferrofluidics Corporation Stacked pole-piece ferrofluid seal apparatus
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
US5238254A (en) * 1987-07-17 1993-08-24 Koyo Seiko Co., Ltd. Ferrofluid seal apparatus
US5473484A (en) * 1994-06-03 1995-12-05 Seagate Technology, Inc. Apparatus for electrically grounding a rotor hub in a disc drive motor
US5617272A (en) * 1994-05-02 1997-04-01 Seagate Technology, Inc. Adhesiveless seal assembly incorporating magnetic seal for use with disc drive
US6029978A (en) * 1996-09-17 2000-02-29 Seagate Technology, Inc. Grounding and conductivity improvement for ferrofluid seals

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171818A (en) * 1977-04-04 1979-10-23 Ferrofluidics Corporation Dynamic lip seal using ferrofluids as sealant/lubricant
US4357024A (en) * 1980-11-19 1982-11-02 Ferrofluidics Corporation Ferrofluid rotary-shaft seal apparatus and method
US4444398A (en) * 1983-02-22 1984-04-24 Ferrofluidics Corporation Self-activating ferrofluid seal apparatus and method
US4478424A (en) * 1984-01-27 1984-10-23 Ferrofluidics Corporation Ferrofluid seal apparatus and method
US4506895A (en) * 1984-08-29 1985-03-26 Ferrofluidics Corporation Self-activating ferrofluid seal apparatus and method of use
US4604229A (en) * 1985-03-20 1986-08-05 Ferrofluidics Corporation Electrically conductive ferrofluid compositions and method of preparing and using same
US5238254A (en) * 1987-07-17 1993-08-24 Koyo Seiko Co., Ltd. Ferrofluid seal apparatus
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
US5018751A (en) * 1989-06-28 1991-05-28 Ferrofluidics Corporation Stacked pole-piece ferrofluid seal apparatus
US5617272A (en) * 1994-05-02 1997-04-01 Seagate Technology, Inc. Adhesiveless seal assembly incorporating magnetic seal for use with disc drive
US5473484A (en) * 1994-06-03 1995-12-05 Seagate Technology, Inc. Apparatus for electrically grounding a rotor hub in a disc drive motor
US6029978A (en) * 1996-09-17 2000-02-29 Seagate Technology, Inc. Grounding and conductivity improvement for ferrofluid seals

Also Published As

Publication number Publication date
JP2003526761A (en) 2003-09-09
GB2363434A (en) 2001-12-19
WO2000043698A1 (en) 2000-07-27
WO2000043698A9 (en) 2001-09-20
HK1042936A1 (en) 2002-08-30
KR100648748B1 (en) 2006-11-23
DE10083894T1 (en) 2002-04-11
KR20030009036A (en) 2003-01-29
GB0119187D0 (en) 2001-09-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090121