Stephen F Martin

US Patent:

6339516, Jan 15, 2002

Filed:

Feb 7, 2000

Appl. No.:

09/499228

Inventors:

Stephen Robert Martin - Louisville CO
Brenda Kaye Drake - Louisville CO

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 1702

US Classification:

360 9912, 2960303

Abstract:

The performance of a leaf spring disc clamp can be enhanced by increasing the flatness of an annular contact surface while the clamp is in its fully deflected, installed position. Such a disc clamp exhibits substantially improved flatness at a minor expense in applied axial force. It has been determined that a lapping process can be used to achieve a desired level of performance without fully deflecting the clamp prior to installation in a disc pack.

US Patent:

6456456, Sep 24, 2002

Filed:

May 1, 1998

Appl. No.:

09/071096

Inventors:

Alan D. Romig - Broomfield CO
Stephen R. Martin - Louisville CO

Assignee:

Syquest Technology, Inc. - Fremont CA

International Classification:

G11B 5016

US Classification:

360 9902, 360 9906

Abstract:

A disk drive capable of receiving a cartridge having a disk with a diameter of about 3. 5 inches which can contain at least 105 megabytes of data includes an operating mechanism for initiating and controlling the positioning of an actuator arm upon which is mounted a read/write transducer. The position of a spindle motor which is used to spin up the disk contained in the cartridge to an operating speed, the locking of the cartridge in the disk drive in an operating mode and the ejection of the cartridge from the drive. The operating mechanism can function to eject the cartridge whether or not the drive is powered up in order to be able to remove the cartridge and transport it to another disk drive or to a secured location in a plane substantially parallel to the disk contained in the cartridge. The cartridge includes a mounting mechanism for accomplishing the motion of the door from the closed to the opened position and locking mechanism for locking the door in the closed position. Further, the cartridge includes a groove which extends rearwardly and across the cartridge in order to lockingly engage the cartridge in the drive.

US Patent:

6483661, Nov 19, 2002

Filed:

Oct 11, 2000

Appl. No.:

09/686551

Inventors:

Stephen Robert Martin - Louisville CO 80027
Brenda Kaye Drake - Louisville CO 80027

International Classification:

G11B 1702

US Classification:

360 9912, 360 9808

Abstract:

The performance of a leaf spring disc clamp can be enhanced by increasing the flatness of an annular contact surface while the clamp is in its fully deflected, installed position. Such a disc clamp exhibits substantially improved flatness at a minor expense in applied axial force. It has been determined that a lapping process can be used to achieve a desired level of performance without fully deflecting the clamp prior to installation in a disc pack. The performance of the disc clamp may be further enhanced by providing one or more slots within a central portion of the disc clamp and joining the slots with a central aperture in the central portion in order to more uniformly distribute the clamping force around a peripheral portion of the disc clamp and thereby improve disc flatness during disc drive operation.

US Patent:

20090021859, Jan 22, 2009

Filed:

Jul 19, 2007

Appl. No.:

11/880419

Inventors:

Stephen R. Martin - Louisville CO, US

International Classification:

G11B 17/02

US Classification:

360 9908

Abstract:

Accurately formed critical tolerance fit components are provided for fluid dynamic bearing motors, including disc drive memory systems. In an aspect, critical tolerance fit components are molded to a metal insert and include a portion of a hub, a disc seating surface, and a disc locating surface. The insert includes another portion of a hub, a sleeve, or a disc clamp retainer for a novel disc clamp. In an aspect, the plastic component is situated to cause the thermal expansion of the plastic to be restricted by the thermal expansion of a metal insert. Expensive machining of a stamped metal hub is minimized or eliminated by using the molded component portions. Strict component tolerances are provided as needed for perpendicularity relative to motor rotation for seating a disc with accurate flatness, a circumferential surface for centering the disc, and tight parallelism between a disc mounting surface and a center shaft.

US Patent:

D3420620, Dec 7, 1993

Filed:

Oct 15, 1991

Appl. No.:

7/776459

Inventors:

Stephen R. Martin - Louisville CO

Assignee:

SyQuest Technology, Inc. - Fremont CA

US Classification:

D14114

US Patent:

52804038, Jan 18, 1994

Filed:

Mar 11, 1993

Appl. No.:

8/029886

Inventors:

Stephen R. Martin - Louisville CO

Assignee:

SyQuest Technology, Inc. - Fremont CA

International Classification:

G11B 2303

US Classification:

360133

Abstract:

A cartridge 20 for a disk drive 130 includes a door 44 which can be urged from a closed position to an opened position which is substantially within the cartridge 20 and located in a plane substantially parallel to the disk 42 contained in the cartridge 20. The cartridge 20 includes a mounting mechanism 48 for accomplishing the motion of the door 44 from the closed to the opened position and a locking mechanism 50 for locking the door 44 in the closed position Further, the cartridge 20 includes a groove 52 which extends rearwardly and across the cartridge in order to lockingly engage the cartridge in the drive 130.

US Patent:

62227009, Apr 24, 2001

Filed:

Nov 16, 1998

Appl. No.:

9/192974

Inventors:

Stephen R. Martin - Louisville CO
Thomas M. Durrum - Broomfield CO

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 17038

US Classification:

360 9808

Abstract:

A disc mounting system for mounting the discs of a disc drive in a fixed radial relationship to the hub of a spindle motor. The disc mounting system includes a compression spring member located between adjacent discs in the disc stack. The compression spring member has a circular cross-section, and forms a wave shape such as a sinsoidal wave shape encircling the hub of the spindle motor. When the discs are positioned in an intended relationship relative to the hub, high and low peaks on the compression spring member engage chamfers adjacent the bore of the discs, and act to center the discs relative to the spindle motor hub to prevent shifting of the discs relative to the spindle motor hub due to applied mechanical shocks and differential thermal expansion of disc stack elements.

US Patent:

52185036, Jun 8, 1993

Filed:

Oct 18, 1991

Appl. No.:

7/779060

Inventors:

Stephen R. Martin - Louisville CO

Assignee:

SyQuest Technology, Inc. - Fremont CA

International Classification:

G11B 2303

US Classification:

360133

Abstract:

A cartridge 20 for a disk drive 130 includes a door 44 which can be urged from a closed position to an opened position which is substantially within the cartridge 20 and located in a plane substantially parallel to the disk 42 contained in the cartridge 20. The cartridge 20 includes a mounting mechanism 48 for accomplishing the motion of the door 44 from the closed to the opened position and a locking mechanism 50 for locking the door 44 in the closed position. Further, the cartridge 20 includes a groove 52 which extends rearwardly and across the cartridge in order to lockingly engage the cartridge in the drive 130.