Appeal No. 2004-1811
Application 10/253,785
demands of modern diesel engines where cylinder pressures can
reach as high as 300 bar. To that end, appellants have devised a
monobloc piston having a piston body fabricated of two steel
parts joined by a weld line. Details of the piston construction
are set forth in independent claim 1 and a copy of that claim can
be found in Appendix A of appellants’ brief.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Ballheimer et al. (Ballheimer) 5,040,454 Aug. 20, 1991
Jarrett 6,155,157 Dec. 5, 2000
“Basic Features of Good Piston Design” Automotive
Industries, (May 1, 1954), pp. 54-56, 106
Claims 1 and 2 stand rejected under 35 U.S.C. § 103(a) as
being unpatentable over Jarrett in view of the Automotive
Industries article and Ballheimer.
Rather than reiterate the conflicting viewpoints advanced by
the examiner and appellants regarding the above-noted rejection,
we refer to the examiner's answer (Paper No. 9, mailed January 8,
2
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