Appeal No. 1999-2444
Application 08/842,088
includes a cylinder block 27, a vertically oriented
crankshaft 29 “supported for rotation within a crankcase
chamber 31 formed by the skirt of the cylinder block 27 and
a crankcase member
32 that is affixed in any suitable manner to the cylinder
block 27” (column 3, lines 12 through 15), and bearings 33
and 34 “which are formed at least in part by the crankcase
member 32 [and in part by the cylinder block 27 as shown in
Figure 3] for rotatably journaling the crankshaft 29”
(column 3, lines
18 through 20). As described by Fukuoka, the engine’s
lubrication system
include[s] a lubricant pump 48, which is
driven off the lower end of the crankshaft 29 and
which may be of any conventional type. This oil
pump draws lubricant from a lubricant reservoir .
. . and distributes it through a main discharge
passage 49 formed in the lower front portion of
the crankcase member 32. This delivers lubricant
to a full flow oil filter 51, which is mounted on
the lower or front side of the crankcase member 32
. . . .
The oil filter 51 then discharges the
lubricant that has been filtered to a main oil
gallery 52 formed integrally in the base of the
crankcase member 32 and which extends vertically.
This main oil gallery 52 is intersected by a
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Last modified: November 3, 2007