Appeal No. 2003-1702 Page 5
Application No. 08/749,840
Moreover, a pressure source is connected to the working
connections of the second circuit when the changeover valve is in
a first position and connected to the working connections of the
first circuit when the changeover valve is in the second
position.
In applying the hydraulic dual steering circuit system of
Bohner to the claimed subject matter, the examiner has noted that
Bohner provides dual circuits and takes the position that
appellant’s change-over valve would read on the combination of
valves 31 and 32 as illustrated in drawing figure 3 of Bohner.
Even if we could agree with the examiner’s viewpoint
concerning that application of Bohner’s system to appellants’
claimed subject matter, the examiner has not fairly addressed in
the final rejection and examiner’s answer where Bohner provides a
description of the additionally recited pressure source and
connection of that pressure source to the working connections of
whatever circuit is deactivated by the change-over valve as
required by appellants’ independent claim 9 and as argued as a
patentable distinction by appellants in the briefs.
To the extent the examiner may have been assumingthat
independent claim 9 merely requires a change over valve position
wherein pressure from a pressure source is vented to a tank or
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