Appeal No. 97-3717 Page 10
Application No. 08/397,163
A selected from among those meeting JIS standard SUS420J2 (the
type containing 0.26 to 0.40% C and 12.00 to 14.00% Cr) taking
into consideration the magnetic properties, the induction
heating suitability, and the corrosion resistance. The
armature 6a, the guide portion 6c and rod 6b are integrally
formed from this material.
Kamiya discloses an electromagnetic fuel injector. As
shown in Figure 3, the electromagnetic fuel injector 21
includes a valve housing 22 provided with a fuel injection
nozzle 23 at its front end and a guide hole 24 extending along
its axis for guiding a plunger-like valve body 31. A valve
body 31 is slidably inserted into the guide hole 24. An
armature 34 is fixed to the rear end of the valve body 31. A
fuel chamber 24a is defined between the fuel injection nozzle
23 and the front portion of the guide hole 24. Kamiya teaches
that the arrangements of electromagnetic housing 27, fixed
magnet core
28, exciting coil 29, terminal 30, O-ring seals 35, 36 and 37,
and fuel filter 38 are substantially identical with those in a
conventional electromagnetic fuel injector. The fixed magnet
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