Michael R Hatchett

US Patent:

7203030, Apr 10, 2007

Filed:

Mar 29, 2004

Appl. No.:

10/811682

Inventors:

Andre Sirilutporn Chan - Milpitas CA, US
Ferdinand Hendriks - Morgan Hill CA, US
Michael Robert Hatchett - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 33/14

US Classification:

360 9702, 360 9703

Abstract:

A device streamlines air flow inside a hard disk drive with a stationary afterbody that is located adjacent to each of the disks. A diverter portion of the device enhances the volumetric flow of air through the diffuser. The overall function of the device effectively expands the air flow so that the speed of the air flow gradually decreases while pressure increases. This design reduces losses in system momentum due to sudden expansion of the air in the drive. In addition, air flow moving toward the disk pack may be contracted to allow efficient energy conversion from pressure energy to kinetic energy prior to merging of the bypass air flow with the air flow among the disks.

US Patent:

7405904, Jul 29, 2008

Filed:

Feb 26, 2007

Appl. No.:

11/678875

Inventors:

Andre Sirilutporn Chan - Milpitas CA, US
Ferdinand Hendriks - Morgan Hill CA, US
Michael Robert Hatchett - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands BV - Amsterdam

International Classification:

G11B 33/14

US Classification:

360 9702, 360 9703

Abstract:

A device streamlines air flow inside a hard disk drive with a stationary afterbody that is located adjacent to each of the disks. A diverter portion of the device enhances the volumetric flow of air through a diffuser and a contraction. The overall function of the device effectively expands the air flow so that the speed of the air flow gradually decreases while pressure increases. This design reduces losses in system momentum due to sudden expansion of the air in the drive. In addition, air flow moving toward the disk pack may be contracted to allow efficient energy conversion from pressure energy to kinetic energy prior to merging of the bypass air flow with the air flow among the disks.

US Patent:

7450337, Nov 11, 2008

Filed:

Sep 30, 2004

Appl. No.:

10/956460

Inventors:

Andre Chan - Milpitas CA, US
Michael Hatchett - San Jose CA, US
Ferdinand Hendriks - Morgan Hill CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 33/14
G11B 25/04

US Classification:

360 9702

Abstract:

An apparatus and method for guiding bypass reentry flow through contraction and filter in a hard disk drive. The method provides a bypass channel for directing airflow away from a first portion of a disk of the hard disk drive and toward a second portion of the disk of the hard disk drive. A contraction portion is coupled with the bypass channel at a location wherein the bypass channel directs the airflow back toward the second portion of the disk of the hard disk drive. The contraction portion accelerates a first portion of the airflow directed toward the second portion of the disk of the hard disk drive. A filter portion integral with the contraction portion is utilized for filtering a second portion of the airflow directed toward the second portion of the disk of the hard disk drive.

US Patent:

7692891, Apr 6, 2010

Filed:

Feb 9, 2006

Appl. No.:

11/352101

Inventors:

Michael R. Hatchett - Surprise AZ, US
Kirk Price - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 33/14

US Classification:

360 9702

Abstract:

A sealed head disk assembly has a cover for enclosing major components of the head disk assembly. The cover has a hermetic seal encompassing an outer perimeter of the cover and a semi-hermetic seal inside a perimeter of the hermetic seal. The hermetic seal and semi-hermetic seal are juxtaposed to at least one complementary surface on the base casting. The base casting, which provides attachment points for the major components of the head disk assembly has at least one complementary surface.

US Patent:

7729083, Jun 1, 2010

Filed:

Feb 9, 2006

Appl. No.:

11/351440

Inventors:

Michael R. Hatchett - Surprise AZ, US
Kirk Price - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 33/14
G11B 25/04

US Classification:

360 9702

Abstract:

A sealed head disk assembly having a base casting that provides attachment points for major components of the head disk assembly and a cover for enclosing major components of the head disk assembly. The base casting has a hermetic seal encompassed by an outer perimeter of the base casting. The hermetic seal is juxtaposed to at least one complementary surface on the cover. The cover has a semi-hermetic seal inside a perimeter of the complementary surface for the hermetic seal. The semi-hermetic seal is juxtaposed to at least one complementary surface on the base casting. The sealed head disk assembly includes a screw causing deflection in a zone of the cover and provides spring force allowing registering the hermetic seal against a complementary surface of the hermetic seal on the base casting and the semi-hermetic seal against the complementary surface of the semi-hermetic seal on the base casting.

US Patent:

7911732, Mar 22, 2011

Filed:

Feb 9, 2006

Appl. No.:

11/351782

Inventors:

Michael R. Hatchett - Surprise AZ, US
Kirk Price - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies, Netherlands B.V. - Amsterdam

International Classification:

G11B 33/14

US Classification:

360 9702, 720648

Abstract:

A sealed head disk assembly has a base casting for providing attachment points for the major components of the head disk assembly. The base casting has a semi-hermetic seal encompassing an outer perimeter of the base casting and allows the semi-hermetic seal to be juxtaposed to at least one complementary surface on the cover. The cover for enclosing the major components of the head disk assembly has a hermetic seal outside a perimeter of the complementary surface for the semi-hermetic seal thus allowing the hermetic seal to be juxtaposed to at least one complementary surface on the base casting.

US Patent:

7262939, Aug 28, 2007

Filed:

Jul 30, 2004

Appl. No.:

10/903203

Inventors:

Michael Robert Hatchett - San Jose CA, US
Daniel Robert Stacer - Morgan Hill CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands, BV - Amsterdam

International Classification:

G11B 33/14
G11B 5/55

US Classification:

3602648, 3602643, 3602647, 3602649, 360265

Abstract:

A top pole piece of a voice coil motor (VCM) is attached to a hard disk drive cover without screw fasteners and with minimal loss of VCM magnetic flux capacity. A pair of leaf springs are supported at both ends, rather than by cantilever, to more uniformly distribute mechanical stress throughout the springs so that less space is required to achieve the same transverse load as a cantilevered spring of the same profile. The smaller space envelope required by this design minimizes the loss of magnetic flux capacity of the VCM. Each leaf spring has two integral legs, central portions of which are rigidly fastened to the drive cover. The end of each leg opposite the central portion applies a force against the cover in the assembled disk drive.

US Patent:

20070183087, Aug 9, 2007

Filed:

Feb 9, 2006

Appl. No.:

11/352086

Inventors:

Michael Hatchett - Surprise AZ, US
Kirk Price - San Jose CA, US

International Classification:

G11B 33/14

US Classification:

360097020

Abstract:

A sealed head disk assembly has a base casting for providing attachment points for the major components of the head disk assembly. The base casting has a hermetic seal encompassing an outer perimeter of the base casting and a semi-hermetic seal inside a perimeter of the hermetic seal, thus allowing the hermetic seal and the semi-hermetic seal to be juxtaposed to at least one complementary surface on a cover. The cover for enclosing the major components of the head disk assembly has at least one complementary surface.