Patent ID: 6796984
Filing Date: 2004-09-28
Classification: A61B,A61F

Abstract:
A device for displacing a first body (1) relative to a second body (2), the device comprising: first and second parts (11, 12), means (15) for applying a force between said first and second parts, a projecting portion (14), means (100) for connecting said projecting portion (14) to the first part (11), a cavity (13) made in the second or other part (12), said cavity (13) being complementary in shape to at least a fraction of said projecting portion (14), the second part (12) in which said cavity (13) is made being of a first material suitable for passing from a non-deformable first state to a deformable semisolid second state, and vice versa, the non-deformable solid state being a state in which said projecting portion (14) cannot deform said first material under drive from said force, and the deformable semisolid state being a state in which said projecting portion (14) is capable, under drive from said force, of penetrating into said first material so that said first material creeps around said projecting portion (14), while the first part (11) carrying said projecting portion (14) is made of a second material that is substantially non-deformable, said first and second parts (11, 12) being mounted to move relative to each other in such a manner that said first portion (14) penetrates into said cavity (13), and means for controlling the transition of the portion of first material surrounding said cavity (13) from said first state to the second, and vice versa, the device being characterized by the fact that said projecting portion (14) forms a closed loop made of an electrically conductive material which completely surrounds a magnetic core (101), which core is not completely surrounded by the means (100) for connecting said projecting portion (14) to the first part (11).