Folding propeller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 28, 2000
Grant Date -
N/A
app pub date -
Nov 18, 1996
filing date -
Dec 23, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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