US PATENT SUBCLASS 440 / 90
PADDLE WHEEL

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

90PADDLE WHEEL {2}
91  DF  .~> Having means to reposition paddle wheel assembly
92  DF  .~> Having means to retract paddle or change paddle attitude {1}

DEFINITION

Classification: 440/90

PADDLE WHEEL:

(under the class definition) Device wherein the means to provide the motive force for a vessel is an engine or motor-driven wheel having a number of planar water contacting blades extending therefrom.

(1) Note. This subclass provides for paddle wheel-type devices involving more than the structure of the paddle wheel per se, or which is otherwise excluded by definition from Class 416, Fluid Reaction Surfaces (i.e., Impellers).