US PATENT SUBCLASS 114 / 155
.~.~ Screw


Current as of: June, 1999
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114 /   HD   SHIPS

144 R  DF  STEERING MECHANISM {14}
154  DF  .~ Wheel-shaft gearing {2}
155.~.~ Screw {2}
156  DF  .~.~.~> Intermediate gear
157  DF  .~.~.~> Right and left {1}


DEFINITION

Classification: 114/155

Wheel-shaft gearing in which screws or worms are used. This subclass also includes multiple screw devices in which a plurality of screws or worms is used, provided one of them is upon the wheel-shaft and said shaft turns another through intermediate gear, all screws being of the same type.