Patent ID: 8956366
Filing Date: 2015-02-17
Classification: A61F

Abstract:
1. A prosthetic acetabular cup inserter and impactor comprising an expandable annular cup engaging element for engaging an inner surface of the prosthetic acetabular cup to be inserted, a handle having a first end, a second end, and a hollow or partly hollow extension portion, a conically tapered expander for expanding the cup engaging element which is connected to the first end of the handle via the hollow or partly hollow extension portion, the second end of the handle provided with an anvil, an elongate operating rod located within the hollow or partly hollow extension portion and connected to the cup engaging element, and a means for moving the elongate operating rod to move the cup engaging element towards the conically tapered expander in which the elongate operating rod has a screw threaded end portion to engage a threaded retainer located in the cup engaging element, in which an anti-rotation element is provided on each of the cup engaging element and the engageable conically tapered expander to prevent the cup engaging element from rotating in relation to the conically tapered expander and wherein the anti-rotation elements comprise an arm attached to the conically tapered expander engaging a slot in the cup engaging element, the conically tapered expander having a first locking element formed thereon, a second locking element connected to the handle for operatively engaging the first locking element, a spring positioned between the first and second locking elements, the elongate operating rod moving the cup engaging element toward the conically tapered expander against a force of the spring to a first position wherein the prosthetic acetabular cup is fixed on the cup engaging element and thereafter to a second position where the first locking element is in engagement with the second locking element to prevent relative rotation between the handle and the conically tapered expander.