Patent ID: 8021370

Claim:
An instrument for positioning a cup component of an orthopedic joint prosthesis, the cup component having a mouth and an inner surface with a circumferential groove, the instrument comprising: an elongate shaft defining an axis, and having a distal end; a housing attached to the distal end of the shaft, the housing extending from the shaft transversely relative to the shaft axis, the housing comprising a base plate; at least two flange portions carried on the shaft, each of the at least two flange portions being configured to move relative to the base plate in a direction transverse to the shaft axis between an in-use position, where at least a portion of each of the at least two flange portions is received in the groove of the cup component, and a retracted position where the at least a portion of each of the at least two flange portions is moved towards the shaft axis so as to allow the cup component to be released from the instrument; and a unitary spring element disposed about the shaft axis and disposed between the at least two flange portions and the axis of the shaft, the spring element biasing each of the at least two flange portions towards the in-use position.