US PATENT SUBCLASS 123 / 55.5
.~.~.~.~ Cylinders opposite and aligned

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

52.1  DF  MULTIPLE CYLINDER {7}
54.1  DF  .~ Cylinders radiating {4}
55.2  DF  .~.~ Cylinders opposite {3}
55.4  DF  .~.~.~ Four-stroke cycle {1}
55.5.~.~.~.~ Cylinders opposite and aligned

DEFINITION

Classification: 123/55.5

Cylinders opposite and aligned:

(under subclass 55.4) Multiple cylinder engine wherein the axes of a first and a second cylinder are spaced from each other by 180 deg. about the crankshaft and wherein the first and second cylinder axes are collinear.