Magnetic structure for erasing disk or disks within hard disk drives
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 27, 2013
Grant Date -
Oct 27, 2011
app pub date -
Apr 11, 2011
filing date -
Apr 23, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A structure for erasure of magnetic media in a hard drive includes a main field pole magnet polarized in a direction toward a drive spindle motor in the hard drive. At least two quadrature magnets are disposed adjacent the main field pole magnet and polarized in a direction toward the main field pole magnet. The main field pole magnet and the at least two quadrature magnets are shaped to provide a slot for insertion of the magnetic media. At least two inverse polarity magnets are disposed on portions of the main pole and quadrature magnets forming the slot. The inverse polarity magnets are polarized in a direction opposed to the direction of the main field pole magnet.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G11B Class
- 6.74 % this patent is cited more than
- 12 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 27, 2025 |
