Composite ramp structure for data storage devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 12, 2000
Grant Date -
N/A
app pub date -
May 14, 1998
filing date -
May 14, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ramp structure that is designed to reduce the amount of thermal expansion induced misalignment (changes in ramp-disk spacing) between load/unload ramps and data storage disks of a data storage device. The ramp structure has a rigid support structure and ramp units attached to the rigid support structure. The ramp units are made of plastic that is particularly suited for use as load/unload ramps. The ramps are mechanically connected only by means of being attached to the rigid support structure. The data storage disks are attached to a spindle. The rigid support structure is made of a material that has a thermal expansion coefficient that is equal to the thermal expansion coefficient of the spindle and any other parts to which the disks are attached. As a temperature change causes the spindle to expand and the spacing between disks to change, the rigid support structure expands at the same rate, thereby maintaining alignment between the ramps and the disks. Preferably, each ramp unit has two ramps, but each ramp unit can have a single ramp.
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