Patent ID: 8757334
Filing Date: 2014-06-24
Classification: F16F

Abstract:
1. A damping device comprising: a first cylindrical member extending axially along a longitudinal axis; a second cylindrical member extending axially along the same longitudinal axis and having grooves separating said second cylindrical member into angular sectors, said second cylindrical member being slidable in said first cylindrical member; a plurality of friction elements extending radially between the first and second cylindrical members and connecting them completely to each other by friction in an axial translational direction for any force below a threshold of a predetermined value, said force tending to create a relative translational movement of the first and second cylindrical members along said longitudinal axis; an adjustment device comprising a plurality of piezoelectric actuators, each acting in a radial direction and adjusting the predetermined value of said threshold; and means, remote from the first and second cylindrical members, for controlling contact pressure of the plurality of friction elements on a surface of at least one of the first and second cylindrical members, in a range that includes zero and non-zero contact pressure.