Patent ID: 9357986
Filing Date: 2016-06-07
CPC Classification: A61B

Claim Text:
1. A medical instrument for dilating osseous structures, with a shaft on whose distal end a tool point is positioned and on whose proximal end a handle is positioned, such that the handle and the tool point are in active connection with one another by means of an actuating element in such a way that by actuating the handle the tool point is spreadable radially at least partly and that a distal end of the actuating element is configured as thickened, wherein the tool point consists of several segments that are configured to pivot radially outward by the thickened distal end of the actuating element into a tulip-shaped opened position of the tool point, which is open towards the distal end and wherein the thickened distal end of the actuating element is configured spherical and acts directly on inner surfaces of the pivotable segments and that the pivotable segments essentially completely enclose the thickened distal end of the actuating element when the tool point is in closed position, and wherein the pivotable segments are mounted on a proximal end of the tool point so that the pivotable segments are each configured to pivot about one pivot axis wherein the pivot axes are formed as pivot pins which are mounted in the proximal end of the tool point and which are aligned transverse with respect to the longitudinal axis of the instrument, and wherein, with the tool point in opened position, proximal portions of the pivotable segments are configured with outer sides that are parallel to one another, the parallel configuration limiting slippage of the tool point within the osseous structures, and distal portions of the pivotable segments are configured with outer sides that are oriented inwardly, the proximal portions being portions proximal relative to the distal portions of the pivotable segments.