Long T Nguyen

US Patent:

62719866, Aug 7, 2001

Filed:

Nov 19, 1999

Appl. No.:

9/444227

Inventors:

Albert Guerini - Gilroy CA
Syed H. Iftikar - Pleasanton CA
Frank Morris - San Jose CA
Long Nguyen - San Jose CA

Assignee:

Castlewood Systems, Inc. - Pleasanton CA

International Classification:

G11B 5012

US Classification:

360 9701

Abstract:

Devices, systems, and methods prevent rigid recording media for video and other data from rattling within a cartridge when that cartridge is removed from a disk drive. To decrease rattling (and the resulting damage to the disk), a hub of the disk is urged against an inner surface of the cartridge housing. A door translates laterally to provide access to the disk within the cartridge. A feature is defined by an inner surface of the cartridge housing, and one or more resilient arms extend from the door assembly so as to engage the feature when the door moves towards a closed position. The feature deflects the arm axially against the disk, so that the arm can act as both an actuation mechanism and a biasing spring.

US Patent:

60117737, Jan 4, 2000

Filed:

Nov 10, 1998

Appl. No.:

9/189732

Inventors:

Albert Guerini - Gilroy CA
Syed H. Iftikar - Pleasanton CA
Frank Morris - San Jose CA
Long Nguyen - San Jose CA

Assignee:

Castlewood Systems, Inc. - Pleasanton CA

International Classification:

G11B 370
G11B 584

US Classification:

369291

Abstract:

Devices, systems, and methods prevent rigid recording media for video and other data from rattling within a cartridge when that cartridge is removed from a disk drive. To decrease rattling (and the resulting damage to the disk), a hub of the disk is urged against an inner surface of the cartridge housing. A door translates laterally to provide access to the disk within the cartridge. A feature is defined by an inner surface of the cartridge housing, and one or more resilient arms extend from the door assembly so as to engage the feature when the door moves towards a closed position. The feature deflects the arm axially against the disk, so that the arm can act as both an actuation mechanism and a biasing spring.

US Patent:

56172729, Apr 1, 1997

Filed:

Oct 23, 1995

Appl. No.:

8/553960

Inventors:

Donald J. MacLeod - Santa Cruz CA
Peter G. Robinson - Capitola CA
Long V. Nguyen - San Jose CA

Assignee:

Seagate Technology, Inc. - Scotts Valley CA

International Classification:

G11B 1702

US Classification:

360 9908

Abstract:

A magnetic fluid seal is provided located in an L-shaped holder for defining the location of the seal relative to the shaft and bore. The magnetic seal is located inside the knee of the L-shaped holder, with a small magnetic fluid filled gap between the end of the magnetic seal and the fixed shaft. Immediately below the pieces and magnet of the magnetic seal is a gasket which provides for an airtight seal between the edge of the L-shaped holder and the outer wall or rotor. The entire assembly is held reliably in place by a shield which is typically press-fitted in place. The shield is designed to incorporate two key design features; (1) the outside diameter of the shield is a press-fit to the inside of the bore defined by the rotor; and (2) at its final axial location the shield presses vertically against the gasket, whereby the gasket is compressed to an approximate degree (for example about 50%) to provide press fitted contact covering the opening between the seal face outside diameter, and the bore of the rotor, thus providing a complete airtight seal at the outer diameter of the seal.

US Patent:

62820532, Aug 28, 2001

Filed:

Aug 5, 1994

Appl. No.:

8/286287

Inventors:

Donald MacLeod - Santa Cruz CA
Long Van Nguyen - San Jose CA
Alireza Rahimi - Los Altos CA
Robert Nottingham - Santa Cruz CA

Assignee:

Seagate Technology, Inc. - Scotts Valley CA

International Classification:

G11B 1708
H02K 700

US Classification:

360 9807

Abstract:

A spindle for a disc drive which can be assembled without the use of adhesives is disclosed. Stator electromagnets are encapsulated in a plastic overmold. The stator is clamped to the base with a clamp spring arrangement. An offset between the stator surface and the base flange is covered by a clamp spring such that binding of the clamp spring by a fastener allows for an adjustable biasing force to secure the stator in place. The magnet and flux shield are attached to the rotor sleeve by an easily positioned retaining ring. An elastic foam washer provides a controlled force to secure the magnet and flux shield in place on the rotor. A second elastic foam washer and a shield provide a controlled biasing force to hold magnetic fluid and magnetic poles to the rotor. Bearings are laser welded to the rotor and the shaft to rotatably mount the rotor about the shaft.