Marine propulsion device including propeller protection means

Details Marine propulsion device including propeller protection means Marine propulsion device including propeller protection means

1978-02-21

1980-11-25

Kazenske, Edward R.

Marine propulsion

Screw propeller

Propeller guard

440 75, B63H 513, B63H 2126

Patent

active

042351839

ABSTRACT:
Disclosed herein is a marine propulsion device including a lower unit having a gear case, a laterally extending anti-cavitation plate extending above a propeller carried on a propeller shaft rotatably mounted in the gear case, and a pair of generally flat side fins, each of which has a laterally extending trailing edge located wholly forwardly of the propeller and which either extend laterally in coplanar relationship from the opposite sides of the gear case, extend laterally in coplanar relationship from the opposite sides of the lower unit at a location between the anti-cavitation plate and the gear case, extend outwardly and downwardly in an angular relationship from the opposite sides of the gear case, or extend laterally in coplanar relationship from the opposite sides of the lower end portion of a vertical fin extending downwardly from the gear case.

REFERENCES:
patent: 1181634 (1916-05-01), Bivert
patent: 1549564 (1925-08-01), Slocum
patent: 1869977 (1932-08-01), Modin
patent: 2140099 (1938-12-01), Wise
patent: 2335597 (1943-11-01), Mathewson
patent: 2690728 (1954-10-01), Cavanaugh
patent: 2706461 (1955-04-01), Smith
patent: 2748400 (1956-06-01), Kregall
patent: 2791196 (1957-05-01), Strang
patent: 2894477 (1959-07-01), Brown
patent: 3433195 (1969-03-01), Poole

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