Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2005-04-05
2005-04-05
Omgba, Essama (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S271000, C029S281100, C029S466000, C029S603030, C029S759000, C029S760000, C269S052000, C269S900000, C360S099120
Reexamination Certificate
active
06874219
ABSTRACT:
A disk clamp for securing disks to the hub of a spindle motor in a disk drive has symmetrically spaced apart countersunk apertures in the top surface of the disk clamp. The apertures enable the disk clamp to maintain a proper orientation before the fasteners are attached. This design overcomes issues related to rotation and displacement of the clamp while it is being fastened to the hub, and reduces the complexity of the tooling and fixtures required to complete the assembly. Less tooling complexity also allows multi-fastener driver systems to be employed so that all of the fasteners required to complete the assembly may be simultaneously attached arid driven into the disk clamp. The countersunk apertures on the disk clamp are designed to couple with tapered sleeves on the installation tool to quickly and precisely center the fasteners in the disk clamp while providing anti-rotation torque for the disk clamp.
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Hanssen Steven Alf
Shen Jr-Yi
Tatarakis Emmanuel N.
Wong Stanley Yen
Bracewell & Patterson L.L.P.
Hitachi Global Storage Technologies - Netherlands B.V.
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