Appeal No. 1997-4373 Page 10
Application No. 08/332,656
Fujimori pump. In particular, the upstream pressure reducing
arrangement (passage 26 and variable volume chamber 39) of Abe
is intended to effect a reduction in pressure for a short
duration during the stroke to deliver a pilot pulse, as
discussed in column 7, line 33, to column 9, line 56, and
illustrated in Figures 5A through 6, directly to the engine
via a fuel injection nozzle (13). Such a pilot pulse is
desirable to reduce combustion noise and nitrogen oxide
emissions at low speed (column 1, lines 14 to 22). As
Fujimori seeks to maintain a constant pressure differential
between the intake manifold and delivery pressures, and as the
actual injection pulse delivered to the engine is determined
by the injector driving circuit (111) and not by the pump
output, one of ordinary skill in the art would not have been
motivated to provide the pressure reducing arrangement taught
by Abe on the Fujimori pump to produce such a pilot pulse at
the output of the pump.
For all of the foregoing reasons, we also reverse the
examiner's 35 U.S.C. § 103 rejections of claims 3 through 6
and 27.
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