Appeal No. 1999-1927
Application No. 08/499,367
clamped by the end covers, then the magnetic pole pieces are also clamped between the
end covers [answer, pages 6-7]. Appellant responds that clamping the field-frame to the
end covers does not teach clamping the pole pieces to the end covers because the pole
pieces are a unitary part of the yoke in the applied references [reply brief].
We agree with the position argued by appellant. Since the magnetic poles are
formed integrally with the yoke in De La Riboisiere, there would be no motivation to seek
to clamp these poles by converting the yoke into two C-shaped sections. Clamping would
only be used if the pole pieces were movable with respect to the clamping member. Since
the poles in De La Riboisiere are fixed with respect to the yoke, we find no motivation to
use two C-shaped end sections as taught by Perkins to clamp the magnetic poles of De
La Riboisiere.
We now consider the rejection of claim 3 based on Linder and either Perkins or
Kawada. The examiner basically finds that Linder teaches the claimed invention except
that Linder does not clamp two magnetic poles between end casings. The examiner cites
Perkins and Kawada as each teaching the use of end covers for clamping magnetic poles
therebetween. The examiner finds that it would have been obvious to the artisan to provide
separate end casings in Linder to clamp the magnetic poles for the respective purposes of
clampingly securing the stator poles to the motor casing and precisely maintaining the
shape of the stator, the bearings and the motor’s other connecting surfaces [answer,
6
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