Appeal No. 2003-1332 Page 4
Application No. 09/797,143
established by presenting evidence that would have led one of ordinary skill in the art to
combine the relevant teachings of the references to arrive at the claimed invention.
See In re Fine, 837 F.2d 1071, 1074, 5 USPQ2d 1596, 1598 (Fed. Cir. 1988) and In re
Lintner, 458 F.2d 1013, 1016, 173 USPQ 560, 562 (CCPA 1972).
Claim 15, the only independent claim on appeal, reads as follows:
A fuel injector comprising:
an actuator portion;
a nozzle portion having a fluid conduit extending therethrough and a valve
seat formed in association with said fluid conduit;
a poppet having a valve head shaped to be received by said valve seat in
sealing relation, said poppet being movable relative to said nozzle portion
between a closed position in which said fluid conduit is blocked and an open
position in which said fluid conduit is at least partially unblocked, said valve head
being made increasingly conformable to said valve seat by wear of said valve
head through repeated contacts with said valve seat, said repeated contacts
causing a contact surface of said valve head to achieve an increasingly
smoother surface finish as a result of said wear.
Gu's invention relates to an electromagnetic fuel injector for a two-stroke engine,
particularly to an electromagnetic fuel injector with compressed air and fuel injection
through a cylinder head of a two-stroke engine with improved spray injection effect and
shortened time of fuel injection. As shown in Figure 2, Gu's fuel injector has an
actuator portion (solenoid assembly 20); a nozzle portion having a fluid conduit
extending therethrough (injection head 29) and a valve seat formed in association with
the fluid conduit (the bevel 298 of injection head 29); and a poppet (mushroom valve
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