Appeal No. 1998-3348 Page 8
Application No. 08/541,948
coupling of the pitching mode mechanical resonance frequency
of the no-load spindle motor and the primary mechanical
resonance frequency of a plurality of disks to be loaded, so
that the first mechanical resonance frequency and the second
mechanical resonance frequency do not differ for one disk
loaded and for plural disks loaded." Similarly, claims 3-6
specify in pertinent part the following limitations: "shaft
parameters are adjusted based on ... the pitching mode
mechanical resonance frequency of a no-load spindle motor and
the primary mechanical resonance frequency of the disks loaded
has been transformed so that the mechanical resonance
frequency determined by coupling the pitching mode mechanical
resonance frequency of the disk loading spindle motor with the
primary mechanical resonance frequency of disks to be loaded
is the same for one disk loaded and for plural disks loaded.”
Also similarly, claim 7 specifies in pertinent part the
following limitations: “said spindle motor includes a
cartridge-like subassembly made by previously applying axial
opposingly directed preloads to outer and inner rings of a
bearing based on ... the pitching mode mechanical resonance
frequency of a no-load spindle motor and the primary
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