Appeal No. 2004-1395 Page 4
Application No. 09/407,053
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).
Claims 15, 19 and 20
Claim 15 reads as follows:
A bearing pad assembly comprising:
a first housing having a bore extending through said first housing;
a first load bearing member coupled to said first housing and defining an
abutment surface opposite to said first housing;
a second housing having a bore extending through said second housing,
adapted to telescopically receive said first housing;
a second load bearing member coupled to said second housing and
defining an abutment surface opposite to said second housing; and
at least one compression spring in the shape of a toroid positioned within
said first housing bore, the toroid having an outside diameter minus an inside
diameter equal to or greater than a height when positioned in the bearing pad
assembly.
Carlston's invention relates to railroad cars and particularly to articulated railroad
cars and to side bearing units used therewith. A side bearing unit is attached to the
bolster of each truck thereby regulating independent movement of the body of the car
and impeding truck hunting. Side bearing units have been used to regulate movement
between the body of a railroad car and the trucks for a substantial period of time.
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