Patent ID: 8255058

Claim:
A medical device comprising: an external component having a first magnet; and an implantable component having a second magnet, wherein the first and second magnet provide magnetic alignment between the external component and the implantable component, wherein the implantable component includes at least one recess and the second magnet includes at least one engagement member extending outwardly of said second magnet, the at least one recess being configured for cooperatively engaging the at least one engagement member to enable replacement of the second magnet, wherein the at least one engagement member is linked to the second magnet such that rotation of the second magnet also rotates the at least one engagement member with the second magnet, wherein the implantable component has a mounting for the second magnet, said mounting comprising a ring member, wherein said at least one recess is positioned on the ring member and comprises at least one receiving slot to receive the at least one engagement member of the second magnet, wherein the at least one receiving slot is positioned on an inner surface of the ring member and extends from an upper surface of the ring member to a lower surface of the ring member, and wherein the engagement member is longitudinally movable through the receiving slot from a position outside the upper surface of the ring member to a position beyond the lower surface of the ring member.