US PATENT SUBCLASS 440 / 12.51
.~ Having separated propulsion means for land and water

Current as of: June, 1999
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440 /   HD   MARINE PROPULSION

12.5  DF  SELF-PROPELLED VEHICLE HAVING LAND AND WATER PROPULSION MEANS (E.G., AMPHIBIOUS VEHICLE) {5}
12.51.~ Having separated propulsion means for land and water {4}
12.52  DF  .~.~> Propulsion means moveable to stowed position {1}
12.55  DF  .~.~> Operator powered drive for propulsion means
12.56  DF  .~.~> Flexible endless track propulsion means
12.57  DF  .~.~> Motor driven screw propeller shaft {2}

DEFINITION

Classification: 440/12.51

Having separated propulsion means for land and water:

(under subclass 12.5) Subject matter wherein (a) the vehicle has a distinct means for moving it under its own power on land and a distinct means for moving it under its own power through a body of water, (b) the distinct means for moving it on land and the distinct means for moving it through the body of water being spaced apart from each other.

(1) Note. The distinct means may be connected to a common axle, such as a wheel and a set of paddles driven by a common axle, however, the paddles may not contact the ground when the ground engaging wheel propels the vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12.66+, for wheel-type land propelling means having a blade integrally mounted on or forming a part of the wheel.