Appeal No. 1997-0397
Application 07/863,900
been appreciated that the circuit could be applied to drive any
brushless DC motor.
It is argued that Sato does not suggest the use of a capacitor
(Br9).
Since Gerfast is relied on for the capacitor, this argument is
unpersuasive. One cannot show nonobviousness by attacking the
references individually where the rejection is based on a combination
of references. In re Keller, 642 F.2d 413, 426, 208 USPQ 871, 882
(CCPA 1981).
Appellants argue that Gerfast uses a current-limiting capacitor
that matches the load to operate a DC motor from household AC, which
"is very different from the invention of claim 66 that is directed to
a combination of a motor and control, and which points out that when
the specified capacitor's value is within a predetermined range, a
given motor hardware is operable within a range of power outputs"
(Br11). It is argued that the motor hardware (rotor parameters,
stator core stack height, wire diameter, winding turn count, etc.) in
Sato and Gerfast would have to be designed to deliver a proper torque
at a speed necessary for proper operation, whereas the present
invention only requires the selection and use of a particular value
of capacitor (Br11-15).
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