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US 6,152,693 AGranted
Folding propeller
AssigneeGori marine as
InventorsSteen Christian Olsen, Sune Ehrenskjold
Life of this patent
Estimating the term…
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AssigneeGori marine as
InventorsSteen Christian Olsen, Sune Ehrenskjold
Estimating the term…
A propeller (1) for commercial vessels as well as sailing ships with an auxiliary engine, having a hub (2) and at least two propeller blades (1) which are pivotally mounted in the hub (2). The blades (1) are pivotable between unfolded operating positions and at least one passive position in which the shaft does not rotate, and the blades extend axially rearwardly in extension of the hub (2). The blades (1) are moveover adapted to pass each other in said passive position. In the passive position, the blades (1) extend axially away from the hub (2) with the same side edge (15) of the two side edges (14, 15) of the blades facing each other. The propeller can hereby have either the front edge (14) of the blades or the rear edge (15) of the blades as the leading one so that the propeller can operate in ordinary gear or in "low gear" thereby enabling optimal efficiency in several operating situations. Further, the propeller offers minimal water resistance in the passive position.
Folding propeller having a hub (2) and at least two propeller blades (1) which are pivotally mounted in the hub (2) about pivot axes (13), said pivot axes extending outwards from a central area in the hub (2) and being disposed in a plane which is at right angles to the axis of rotation of the propeller, said blades (1) being pivotable about their pivot axes between unfolded, radially protruding operating positions in which the propeller during rotation propels the ship through the water, and one passive position in which the shaft does not rotate, and in which the blades extend axially rearwards in extension of the hub (2) with the same side edge (15) of the two side edges (14, 15) of the blades (1) facing each other, and wherein said blades (1) are adapted to pass each other in said passive position, so that the blades are movable to both sides of the passive position.
Dependencies are inferred from the claim text.