Folding boat propeller
AssigneeAB Volvo Penta
InventorsLennart H. Brandt, Ingvar O. Hultmark, Lars H. Petersson, Carl U. Soderbaum
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Abstract
A boat propeller with foldable blades, a so-called folding propeller, in which the mounting axes of the blades in the hub are inclined towards the rotational axis of the hub, so that the blades are movable between their folded and unfolded positions by rotating essentially one-half turn.
Claims9
Boat propeller comprising a hub for attachment to a propeller shaft and at least two propeller blades carried by said hub, each of which blades has a suction side and a pressure side, and which are pivotally mounted in the hub so that they are movable between an unfolded operating position and a folded position in which the blades extend rearwards in the direction of the shaft, characterized in that the mounting axes of the blades are arranged at such an angle relative to the rotational axis of the hub that the blades are movable between the unfolded and the folded positions by rotation about the respective mounting axis at least essentially one-half turn, the hub having means for permitting limited rotation of the hub relative to a said propeller shaft, and transmission means arranged, upon said relative movement, to transmit torque to the propeller blades for rotating them between the folded and the unfolded positions.
Dependencies are inferred from the claim text.