Appeal No. 1998-1503
Application No. 08/676,907
That is, the instant claims are specifically directed to a
reciprocating pump used as a fuel injection device and that
pump comprises an excitation circuit for supplying current
pulses to an excitation coil and the excitation coil is
controlled by both the duration and amplitude of the reference
signal to the comparator. If we understand appellant’s
position, it is that the reciprocating pump would create the
pressure which the fuel is under when it flows into the
combustion chamber whereas the opening and closure of a
solenoid valve, as in Suquet and Takahashi, allows the fuel,
which is already under pressure, to flow into the combustion
chamber. Therefore, the reciprocating pump to which the
instant claims are directed would be upstream of the solenoid
valves to which Suquet and Takahashi are directed. As such,
appellant argues, it would not have been obvious to substitute
a solenoid operated pump for the solenoid valve in Suquet and
then substitute the valve-controlled circuit of Takahashi for
the valve-control circuit of Suquet and then modify those
circuits as required by claims 2 and 3. Appellant states, at
page 8 of the principal brief, “Such a substitution is neither
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