US PATENT SUBCLASS 440 / 17
.~ Having nonpropelling cycle segment

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

13  DF  OSCILLATING PROPELLING MEANS {3}
17.~ Having nonpropelling cycle segment {3}
18  DF  .~.~> Piston and cylinder
19  DF  .~.~> With means to move propelling element to nonpropelling position
20  DF  .~.~> With reversing means

DEFINITION

Classification: 440/17

Having nonpropelling cycle segment:

(under subclass 13) Device wherein the propelling means supplies no motive force on one portion of its back and forth movement.