Patent ID: 6827343
Filing Date: 2004-12-07
Classification: A61F

Abstract:
Torsion device of an exoprosthesis, with a proximal part (1) which, counter to the action of a resilient torsion element, can be turned in positive and negative directions of rotation (5, 6) in relation to a distal part (2), the torsion element having, in the positive direction of rotation (5), a torsion characteristic different than that in the negative direction of rotation (6), characterized in that the torsion element comprises two separate torsion spring elements (3, 4) which have different spring characteristics and are each fitted, with prestressing, between associated abutments (7, 8 and 7, 9, respectively) in such a way that in each case only one of the two torsion spring elements (3 or 4) is active in one of the two directions of rotation (5 or 6), namely only in the positive direction of rotation or only in the negative direction of rotation.