JPS6432482A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS6432482A
JPS6432482A JP18911887A JP18911887A JPS6432482A JP S6432482 A JPS6432482 A JP S6432482A JP 18911887 A JP18911887 A JP 18911887A JP 18911887 A JP18911887 A JP 18911887A JP S6432482 A JPS6432482 A JP S6432482A
Authority
JP
Japan
Prior art keywords
hda
pressure
check valve
magnetic disk
gas
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.)
Pending
Application number
JP18911887A
Other languages
Japanese (ja)
Inventor
Seiji Takahashi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP18911887A priority Critical patent/JPS6432482A/en
Publication of JPS6432482A publication Critical patent/JPS6432482A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make the titled device small in size and light in weight, and to reduce cost by providing a first check valve for working only in the direction for exhausting inert gas, and a second check valve for working only in the direction for allowing the inert gas to flow into a magnetic head and magnetic disk assembly body HDA. CONSTITUTION:When a temperature of gas (helium gas) in an HDA 2 rises by following up an operation of a magnetic disk device, and pressure in the HDA 2 rises, gaseous helium 8 is blown off into the open air from a check valve 1. Also, when the pressure in the HDA 2 has decreased due to an operation stop of the magnetic disk device, gaseous helium is replenished through a valve 5, a filter 4 and a check valve 3 from a gas cylinder 7. Accordingly, the pressure in the HDA 2 is always kept constant. In such a way, the gaseous helium is sucked and exhausted by rising and falling of the pressure in the HDA 2, and as a result, a pressure difference between the inside of the HDA 2 and the open air comes to scarcely exist. In such a way, the closed structure of the HDA 2 can be simplified and miniaturized.
JP18911887A 1987-07-28 1987-07-28 Magnetic disk device Pending JPS6432482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18911887A JPS6432482A (en) 1987-07-28 1987-07-28 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18911887A JPS6432482A (en) 1987-07-28 1987-07-28 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS6432482A true JPS6432482A (en) 1989-02-02

Family

ID=16235688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18911887A Pending JPS6432482A (en) 1987-07-28 1987-07-28 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS6432482A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6602199B2 (en) 1999-06-09 2003-08-05 Vsm Technology Inc. Method and apparatus for measuring values of physiological parameters
JP2009043338A (en) * 2007-08-08 2009-02-26 Sharp Corp Thermal assist information recording apparatus and thermal assist information recording method
US8248724B2 (en) * 2008-06-19 2012-08-21 Hitachi Global Storage Technologies, Netherlands B.V. Disk drive and method of re-injecting low density gas in a hermetically sealed disk enclosure of a disk drive
JP2013105511A (en) * 2011-11-14 2013-05-30 Toshiba Corp Information processing device
US8705202B2 (en) 2007-01-19 2014-04-22 HGST Netherlands B.V. Reduce leakage of low-density gas during low-density gas injection into a disk drive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6602199B2 (en) 1999-06-09 2003-08-05 Vsm Technology Inc. Method and apparatus for measuring values of physiological parameters
US8705202B2 (en) 2007-01-19 2014-04-22 HGST Netherlands B.V. Reduce leakage of low-density gas during low-density gas injection into a disk drive
JP2009043338A (en) * 2007-08-08 2009-02-26 Sharp Corp Thermal assist information recording apparatus and thermal assist information recording method
US8248724B2 (en) * 2008-06-19 2012-08-21 Hitachi Global Storage Technologies, Netherlands B.V. Disk drive and method of re-injecting low density gas in a hermetically sealed disk enclosure of a disk drive
JP2013105511A (en) * 2011-11-14 2013-05-30 Toshiba Corp Information processing device

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