US PATENT SUBCLASS 182 / 67.3
.~.~.~.~.~ By use of gear

Current as of: June, 1999
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182 /   HD   FIRE ESCAPE, LADDER, OR SCAFFOLD

63.1  DF  HAVING TRANSPOSITIONING BASE AND ERECTING MEANS {4}
64.1  DF  .~ Ladder pivotably mounted on transpositioning base (e.g., on vehicle) {2}
65.1  DF  .~.~ About vertical axis {3}
66.1  DF  .~.~.~ Extension ladder (i.e., ladder having sliding section) {2}
67.1  DF  .~.~.~.~ Manually operated {2}
67.3.~.~.~.~.~ By use of gear

DEFINITION

Classification: 182/67.3

By use of gear:

(under subclass 67.1) Device wherein the ladder is extended by manually rotating a toothed wheel in meshing engagement with another toothed wheel or with a toothed segment.