Joseph C Cardona

US Patent:

54814200, Jan 2, 1996

Filed:

Nov 9, 1992

Appl. No.:

7/973945

Inventors:

Joseph C. Cardona - San Jose CA
Michael C. McGrath - Pleasanton CA

International Classification:

G11B 1702
G11B 2303

US Classification:

360 9906

Abstract:

An interface between a removable cartridge containing a rigid disk for storage of data and a disk drive. The cartridge includes a normally closed and locked pivoting arcuately shaped shutter to cover a disk access window and an opening for a hub of the disk for spinning. The disk drive includes a shutter opener arm for unlocking and opening the shutter as the cartridge is inserted therein, a magnetic spindle with connecting mechanism for extending the spindle into contact with the hub and retracting it out of contact, and an abutment surface to deactivate a disk immobilizer when the cartridge is inserted into the disk drive.

US Patent:

D3648583, Dec 5, 1995

Filed:

Nov 9, 1992

Appl. No.:

D/001260

Inventors:

Michael C. McGrath - Pleasanton CA
Joseph C. Cardona - San Jose CA

Assignee:

Avatar Systems Corporation - Milpitas CA

US Classification:

D14114

US Patent:

56360959, Jun 3, 1997

Filed:

Apr 11, 1994

Appl. No.:

8/225737

Inventors:

Michael C. McGrath - Pleasanton CA
Joseph C. Cardona - San Jose CA
Dan Cautis - San Mateo CA

Assignee:

Avatar Systems Corp. - Milpitas CA

International Classification:

G11B 2303

US Classification:

360133

Abstract:

An engagement interface between a removable cartridge containing a rigid disk for storage of data and a disk drive. The cartridge includes an opening for a hub of the disk for spinning and the disk drive has a magnetic spindle with connecting mechanism for extending the spindle into contact with the hub and retracting it out of contact. The cartridge also includes a disk immobilizer to hold the disk with its hub centered in the opening when the cartridge is outside the disk drive, and a detachable mechanical interconnection between the hub and the housing to retain the hub generally centered in the opening when the disk immobilizer is deactivated as the cartridge is inserted in the disk drive but before the spindle has engaged the hub for instances when the cartridge is inserted in the disk drive with other than a vertical orientation.

US Patent:

48336670, May 23, 1989

Filed:

Dec 17, 1987

Appl. No.:

7/133947

Inventors:

Joseph T. Castagna - San Jose CA
Joseph C. Cardona - San Jose CA

Assignee:

Priam Corporation - San Jose CA

International Classification:

G11B 2504

US Classification:

369263

Abstract:

A mounting structure for a spindle motor assembly is disclosed that is capable of reducing acoustic noise generated by the motor assembly. Standard spindle motor assembly parts are provided with a viscoelastic stator mounting system that isolates and damps vibrations between the rotor assembly and the rest of the spindle motor assembly. Additionally, rotor slots are provided in the rotor cap. The slots are designed to ensure that the resonant frequency of the rotor cap is substantially different than the switching frequency of the motor itself.