Magnetic disk drive, magnetic disk drive manufacturing...

Details Magnetic disk drive, magnetic disk drive manufacturing... Magnetic disk drive, magnetic disk drive manufacturing...

2011-04-12

2011-04-12

Klimowicz, William J (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C073S023200

Reexamination Certificate

active

07924527

ABSTRACT:
Embodiments of the present invention provide a magnetic disk drive that can estimate the amount of gas filled in a housing precisely and simply. According to one embodiment, a magnetic disk drive including a housing in which a magnetic disk and a magnetic head are accommodated and gas having lower density than air is filled, a heating body provided in the housing, and means for holding a reference value of a parameter representing the temperature change speed of the heating body when the heating body is heated in the housing filled with a predetermined reference amount of the gas.

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patent: 7808740 (2010-10-01), Tanabe
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patent: 2005/0270690 (2005-12-01), Gunderson
patent: 2009/0141400 (2009-06-01), Tanabe
patent: 03203011 (1991-09-01), None
patent: 06176557 (1994-06-01), None
patent: 2000-222837 (2000-08-01), None
patent: 2004-535647 (2005-11-01), None

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