Patent ID: 6918914
Filing Date: 2005-07-19
Classification: A61B

Abstract:
1. An acetabular reamer comprising a reaming head comprising a plurality of arcuately-shaped segments, the plurality of segments being generally symmetrically distributed about a center point, and being extendable or retractable about the center point to create a variable dimensioned recess in an acetabular region; further comprising an actuator for selectively extending or retracting the segments so that the segments remain generally symmetrically distributed about the center point as the segments are expanded or retracted; wherein the actuator further comprises; a plurality of translating mechanisms, each mechanism having a first end and second end, the first end attached to a respective segment on a side opposite a convex surface of the segment, each translating mechanism providing translational movement of the respective segment; a transmission, mechanically coupled to each of the translating mechanisms at the second end, for transferring a rotational movement to the translating mechanism; an adjustment rod for applying the rotational movement to the transmission; wherein the translating mechanism further comprises; a screw coupled to the transmission for transferring the rotational movement; and a threaded sleeve, having a first sleeve end for attaching the segment and a second sleeve end for receiving the screw, the threaded sleeve being engaged with the screw for converting the rotational movement to a translational movement of the segment.