Appeal No. 96-3445
Application 08/233,088
Appellants’ claimed invention is directed to an injector
for delivering fuel and air to an engine. Claim 2 is exemplary
of the subject matter on appeal and recites:
2. An injector for delivering a charge of fuel and air to
an engine, said injector including a body having a central
passage extending to a valve seat, a poppet valve secured on a
valve stem extending through the central passage and engageable
with the valve seat to control flow therethrough, an air inlet
opening into the central passage, a fuel nozzle opening into the
central passage near the valve seat, a valve periodically
metering fuel through the nozzle into the central passage to
create a fuel-air charge in the central passage, and an actuator
periodically disengaging the poppet valve from the valve seat to
deliver the fuel-air charge from the central passage, wherein the
valve stem includes a valve disc that sealingly engages the
central passage, and wherein the volume of the central passage
between the valve seat and the valve disc is in the range of
about ten to about twenty times the maximum volume of the fuel
delivered through the nozzle during a fuel metering event.
THE REFERENCE
The following reference was relied on by the examiner in a
rejection of the claims under 35 USC § 103:
McKay 4,841,942 Jun. 27, 1989
THE REJECTION
Claims 2 and 3 stand rejected under 35 U.S.C. § 103 over
McKay.
The examiner found that the claimed invention differs
from the McKay patent by its recitation of a disc valve but that
2
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