1
Leon Zhao, David D Koester: Actuator assembly with enhanced bonding surface for bonding a voice coil to a yoke. Seagate Technology, Derek J Berger, January 27, 2004: US06683756 (12 worldwide citation)

An information handling system including a base, a disc rotatably attached to the base; and an actuator assembly movably attached to the base. The actuator assembly also has a main body which includes a pivoting portion, an actuator arm attached to the main body, and a yoke attached to the main body ...


2
Michael W Pfeiffer, David D Koester, Eric D Johnson, David F Borning, Kevin J Spiczka: Method for balancing a rotating assembly using eccentric rings. Seagate Technology, Westman Champlin & Kelly P A, September 20, 2005: US06947253 (9 worldwide citation)

A method for balancing a spindle assembly for compensating for dynamic imbalance of the spindle assembly. The method uses a plurality of adjustable eccentric rings for dynamically balancing the spindle assembly. The plurality of eccentric rings are preassembled with the spindle assembly and the meth ...


3
Lawrence E Hanke, Dennis R Nielsen, David D Koester: De-swaging technique for head gimbal assembly. Seagate Technology, Kinney & Lange, September 13, 1994: US05347413 (7 worldwide citation)

In a magnetic head carrying device a method and apparatus for removing a magnetic head carrying arm from a support arm wherein ball stake mounting is used to affix the magnetic head carrying arm to the support arm. Tool receiving holes are provided in the magnetic head carrying arm, in a mounting pl ...


4
Paul D Lofstrom, Stephen P LeClair, David D Koester, Michael D Schroeder: Cover including multiple cover plates with damped layers. Seagate Technology, Westman Champlin & Kelly P A, February 24, 2004: US06697213 (7 worldwide citation)

A cover for a disc drive assembly including multiple damped cover plates. The multiple damped cover plates include a first cover plate and a second cover plate. Each of the first and second cover plates includes a damped structure, such as a viscoelastic damping layer, to damp vibration of the cover ...


5
Michael W Pfeiffer, David D Koester, Eric D Johnson, David F Borning, Kevin J Spiczka: Balancing system with adjustable eccentric rings for a disc drive assembly. Seagate Technology, Westman Champlin & Kelly P A, March 16, 2004: US06707639 (6 worldwide citation)

A balancing system for a spindle assembly for compensating for dynamic imbalance of the spindle assembly. The spindle assembly includes a rotor rotatable about a shaft. The rotor includes a plurality of radially concentric channels supporting adjustable eccentric rings for dynamically balancing the ...


6
Lawrence E Hanks, Dennis R Nielsen, David D Koester: Tool for a de-swaging head gimbal assembly. Seagate Technology, Kinney & Lange P A, September 10, 1996: US05553374 (5 worldwide citation)

In a magnetic head carrying device a method and apparatus for removing a magnetic head carrying arm from a support arm wherein ball stake mounting is used to affix the magnetic head carrying arm to the support arm. Tool receiving holes are provided in the magnetic head carrying arm, in a mounting pl ...


7
David D Koester: Mechanism to dampen vibration of a stop pin of a disc drive actuator arm. Seagate Technology, Kinney & Lange P A, September 8, 1998: US05805387 (5 worldwide citation)

An E-block has an actuator arm carrying a slider; the E-block being rotatable to position the slider over a selected track of a recording disc of a magnetic disc drive. The E-block has a stop pin arranged to engage a first stop when the slider is positioned adjacent an inner track on the disc and to ...


8
Lawrence E Hanke, Dennis R Nielsen, David D Koester: De-swaging technique for head gimbal assembly. Seagate Technology, Kinney & Lange, December 5, 1995: US05471735 (4 worldwide citation)

In a magnetic head carrying device a method and apparatus for removing a magnetic head carrying arm from a support arm wherein ball stake mounting is used to affix the magnetic head carrying arm to the support arm. Tool receiving holes are provided in the magnetic head carrying arm, in a mounting pl ...


9
David D Koester: Bearing for an actuator of a disc drive. Seagate Technology, Westman Champlin & Kelly PA, February 20, 2001: US06191924 (4 worldwide citation)

An improved bearing cartridge to rotationally couple an actuator block supporting a plurality of heads to a chassis of a disc drive. The improved bearing cartridge having increased radial stiffness and including first and second concentrically aligned elongated sleeves. The first sleeve is coupled t ...


10
Peter R Janik, David D Koester, Stephen P LeClair: Housing cover with spindle cap. Seagate Technology, Westman Champlin & Kelly P A, January 7, 2003: US06504672 (4 worldwide citation)

A housing structure for a disc drive including a rigid housing having opposed inner and outer surfaces and a spindle opening. A spindle cap is sized to fit in the spindle opening and includes opposed inner and outer surfaces. The inner surface of the spindle cap is raised above or spaced from the in ...