Multi-element, line cutting and prop holding system for a marine

Details Multi-element, line cutting and prop holding system for a marine Multi-element, line cutting and prop holding system for a marine

1999-07-08

2000-09-05

Avila, Stephen

Marine propulsion

Screw propeller

Self-clearing

416146R, B63M 128

Patent

active

061134457

ABSTRACT:
A marine system using a number of different cutting and grinding members positioned at different parts of a marine screw prop shaft adjacent or around the prop for clearing away any line or rope entanglements, particularly for marine props on large commercial vessels. The cutting/grinding edges and surfaces are positioned in differing directions and angles, some with supplemental, opposed members to assist in the rope cutting/abrading, severing process. The rope cutting/abrading structure likewise holds the prop to the vessel should the shaft driving the propeller break, preventing its loss. The preferred embodiment includes a set of outer, aft directed arms and a nested set of inner, substantially forwardly directed arms, each carrying, interactive, side edge cutting or abrading surfaces, with the number of arms coinciding with the number of blades on the associated propeller. The inner set of arms are fixed to the hub of the propeller, with its arms positioned at the open spaces between the prop blades, with its forward ends terminating in a sidewardly directed or angled set of extensions having cutting edges and extending down past the back side of an interactive, circular, abrading wheel, producing an interlocking, interfacing of the two together, preventing a propeller from being lost should a propeller shaft break.

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