Patent ID: 8398691

Claim:
A surgical device for treating the pathology of flat feet, comprising: an expansible outer casing having an inside surface; an expansion member having a central passageway and an outside face shaped so as to come into surface abutment against the outer casing inside surface, the expansion member being suitable for moving inside the outer casing in a compression direction, the outer casing and the expansion member being shaped so that moving the expansion member in the compression direction causes the outer casing to expand radially; a guide member comprising a central rod extending substantially at the center of the outer casing shaped to co-operate with the expansion member so as to guide said expansion member in translation inside the outer casing, the central rod being adapted to slide along the expansion member central passageway, the guide member further including a blocking head suitable for limiting movement in translation of the expansion member in the compression direction; a non-return check means disposed on the inside surface and the outside face, the check means comprising a first engagement means associated with the expansion member and second engagement means associated with the outer casing, the first and second engagement means have first and second engagement faces extending slantingly relative to the compression direction and adapted to slide axially against each other while the expansion member is moving towards its operating position, the check means being shaped to allow the expansion member to slidingly move in the compression direction towards an operating position inside the outer casing, and to irreversibly prevent axial sliding movement of the expansion member in the reverse direction once the operating position is reached, the check means and the blocking head being adapted to lock the expansion member in the operating position; and, a graspable member adapted to connect mechanically with a fitting instrument designed to clip together the components making up the surgical device by exerting a traction force on the graspable member, wherein the graspable member is formed by an extension to the central rod, at the end thereof that is situated opposite from the blocking head.