US PATENT SUBCLASS 440 / 65
.~.~ With means to lift propeller when an obstruction is hit

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

49  DF  SCREW PROPELLER {12}
53  DF  .~ With means effecting or facilitating movement of propulsion unit or a segment of the propulsion unit (e.g., tilting or steering) {9}
65.~.~ With means to lift propeller when an obstruction is hit

DEFINITION

Classification: 440/65

With means to lift propeller when an obstruction is hit:

(under subclass 53) Device wherein a means associated with the propeller is provided to move the propeller in an upward direction when said means encounters an impediment.