US PATENT SUBCLASS 123 / 53.3
.~.~ Cylinders opposite

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

52.1  DF  MULTIPLE CYLINDER {7}
53.1  DF  .~ Cylinder offset from crankshaft axis {3}
53.3.~.~ Cylinders opposite {1}
53.4  DF  .~.~.~> Two-stroke cycle

DEFINITION

Classification: 123/53.3

Cylinders opposite:

(under subclass 53.1) Multiple cylinder engine wherein the axes of a first and a second cylinder are spaced from each other by 180 deg. about the crankshaft.