Appeal No. 2001-1627
Application No. 09/289,420 Page 8
and 15) that the limitation regarding non-electrically isolated
primary and secondary circuit loops is not met.
Appellant asserts (brief, page 15) that figure 3a of Cuk is
illustrative of appellant's position that the primary and
secondary circuit loops of Cuk are electrically isolated by C1,
Le, C2 and Vg, and that these circuits would prevent electrical
charge from flowing from L1 to L2. We find that Cuk discloses
(col. 2, lines 55-58) that “Fig. 6 illustrates one possible
realization of the present invention for a coupled-inductor
converter with dc isolation between the input (source) circuit
and multiple output (load) circuits.” Cuk additionally discloses
that "[b]ecause the coupled-inductor configurations of Fig. 1 and
Fig. 7 do not have the isolation property of the configuration of
Fig. 6 . . .."
We find from the disclosure of Cuk that in the embodiment of
figure 6, the primary and secondary circuit loops are
electrically isolated, but that in the embodiments of figures 1
and 7, the primary and secondary circuit loops are not
electrically isolated. Accordingly, we find this limitation of
claim 1 to be met by Cuk.
Appellant further argues (brief, page 16) that the
recitation in claim 1 that "the input and output voltages have
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