Patent ID: 8449256
Filing Date: 2013-05-28
Classification: B63H

Abstract:
1. A variable-pitch propeller comprising at least one blade rotatably pivoted to a propeller casing, a shaft being coupled to an engine and coaxial to said propeller casing, a kinematic system coupled to said shaft, or to said propeller casing, and to said at least one blade, for regulating the rotary motion of said at least one blade around its own pivot axis to said propeller casing, to vary the pitch, as well as means for transmitting the rotary motion of said shaft to said propeller casing, said propeller being shaped to provide at least one not null angular range for the free relative rotation of said at least one blade around its pivot axis relative to said propeller casing, further comprising one elastic element directly or indirectly countering the relative rotation of said at least one blade relative to said propeller casing, wherein the at least one free rotation angular range comprises a free rotation angular range of said shaft relative to said propeller casing, the elastic element countering the relative rotation of the shaft relative to the propeller casing.