Appeal No. 99-0209
Application No. 08/643,048
spray pegs (76) located upstream of the secondary combustion
zone in the secondary air passages. In the Amos system, the
gas fuel is mixed with the air after the fuel exits the fuel
spray pegs. Essentially, with regard to the system recited in
the appellant’s claims Amos does not teach providing fuel and
air to a secondary combustion zone by means of a plurality of
spokes, each of which injects both the fuel and the air.
For this teaching the examiner looks to Bayer, which is
directed to a jet engine with an afterburner. Bayer
discloses, inter alia, a plurality of fuel/air injectors (31)
that are very similar in construction to the injectors used in
the appellant’s invention, in that they include separate
connections for fuel supply and air supply, an annular chamber
in which fuel and air are received, and a plurality of
discharge openings (51) through which fuel and air are
injected directly into a combustion chamber. It is the
examiner’s position that it would have been obvious to one of
ordinary skill in the art to replace the secondary combustion
zone fuel injectors disclosed by Amos with those of Bayer
because “[s]uch a configuration provides maximum fuel
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