Appeal No. 1998-1078 Page 10
Application No. 08/442,532
torque ripple of a brushless motor and the motor's trigger
point, are such that the invention would have been obvious.
The answer is no. The examiner fails to show that the prior
art as a whole recognized the relationship let alone its
effect on the reaction delay of the motor.
Although the examiner is correct in asserting that "Imai
et al. ... discloses (col. 10, lines 39-40) the driving
magnets being offset from the frequency generating magnetss
[sic] by 22.5 degrees to prevent faulty operation of a D
latch," (Paper No. 13 at 2), the reference does not refer to
an offset torque ripple of a brushless motor let alone its
relationship to the motor's trigger point. Recognition of the
relationship is essential to the obviousness of conducting
experiments to decide the relative positions of the stator
core, the driving magnet pole portion, the FG magnetized
portion, and the FG pattern in a circumferential direction
that will prevent the reaction delay of the motor. The
examiner offers no basis for the obviousness of the necessary
experiments apart from the appellants' disclosure.
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