Patent ID: 8974260
Filing Date: 2015-03-10
Classification: B63H

Abstract:
1. A cutter assembly for a motor propeller, the cutter assembly comprising in combination: a) cover halves comprising external surfaces and internal surfaces sized to fit around a cylindrical motor housing, the cover halves joined one cover half to the other cover half by at least one top hinge assembly and at least one bottom releasable external fastener assembly that allow the cover halves to open and receive the cylindrical motor housing, to close around the cylindrical motor housing, and lock onto the cylindrical motor housing, thus forming a cylindrical cover around the cylindrical motor housing, the cylindrical cover around the cylindrical motor housing comprising a cylindrical cover longitudinal central axis, a cylindrical cover top side opening comprising a diameter large enough to receive a shaft attached to a top side of the cylindrical motor housing, a cylindrical cover internal surface, a cylindrical cover external surface, a cylindrical cover forward end, and a cylindrical cover aft end proximate to a propeller; and b) four equal sized cutting blades, each equal sized cutting blade comprising a cutting blade base, dual cutting blade cutting edges, a cutting blade surface comprising a concave portion, a cutting blade surface comprising a convex portion, and a cutting blade tip end, the four equal sized cutting blades equally spaced around the cylindrical cover external surface, and attached to the cylindrical cover external surface at equal distance from the cylindrical cover aft end proximate to the propeller, such that each cutting blade is ninety degrees from adjacent cutting blades with respect to the cylindrical cover longitudinal central axis, such that an orientation of each cutting blades is forty-five degrees from a vertically oriented plane extending through the cylindrical cover longitudinal central axis, such that each cutting blade surface concave portion faces the cylindrical cover forward end, and such that each cutting blade surface convex portion faces the cylindrical cover aft end proximate to the propeller.