Prop-saver (propeller guard device)

Details Prop-saver (propeller guard device) Prop-saver (propeller guard device)

1990-07-19

1991-04-16

Basinger, Sherman

Marine propulsion

Screw propeller

Propeller guard

114274, 440 66, 440900, B63H 516

Patent

active

050078690

ABSTRACT:
Disclosed herein is a propeller guard device, including a laterally extending fin and a vertical extension, or sleeve. The fin and sleeve could be manufactured as a singular item. The vertical sleeve is attached to the midline area of the fin, with the leading edge of the sleeve being generally co-terminus with the leading edge of the fin. The fin is at least as wide as the rotational path of the propeller blades. The singular fin extends laterally on either side of the sleeve in a generally coplanar relationship. The leading edge of the fin is elevated from three to five degrees higher than the trailing edge of the fin. The trailing edge of the fin is located forwardly of the rotational path of the propeller blades, or is lengthened and extends towards the rear of the device to the extent of being even with the midline of the rotational path of the propeller blades.

REFERENCES:
patent: 1226400 (1917-05-01), Smith
patent: 1549564 (1925-08-01), Slocum
patent: 1869977 (1932-08-01), Modin
patent: 2717570 (1955-09-01), Willoughby
patent: 3099240 (1963-07-01), Montague
patent: 3433195 (1969-03-01), Poole
patent: 4205618 (1980-03-01), Olsson
patent: 4235183 (1980-11-01), Evinrude
patent: 4597742 (1986-07-01), Finkl

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