An instrument for implanting an acetabular cup prosthesis in a patient's acetabulum. The cup is gripped on the base of the instrument and is aligned and inserted in accordance with a plane normal to the plane in which a patient is positioned and normal to a line between the right and left anterior/superior...http://www.google.ca/patents/US4994064?utm_source=gb-gplus-sharePatent US4994064 - Instrument for orienting, inserting and impacting an acetabular cup prosthesis
