Appeal No. 1997-4053
Application 08/548,714
further in agreement with the examiner's conclusion that it
would have been obvious to use a thermoelectric Peltier heater
in the fuel injection system of Barret for the advantages that
Uddin discloses such heaters to have. Uddin discloses that
Peltier heaters are capable of extremely accurate temperature
control, typically to within plus or minus 0.1EC (Uddin,
column 2, at lines 20 through 23). Uddin further discloses
that the response time of these thermoelectric heaters are
extremely quick. See column 3, at lines 6 and 7. Therefore,
we are in agreement with the examiner's conclusion that it
would have been obvious to utilize a Peltier type heater in
the device of Barret for the advantage of accurate temperature
control and extremely quick operation.
We acknowledge that appellants argue that the device
of Barret includes an insulator for thermally insulating the
electric heater from the engine cylinder head. However, the
Peltier device functions by "pumping" heat conducted to it
from the surrounding material to the fuel contacting surface.
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