The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2008
Filed:
Feb. 18, 2005
Gregory E. Plaskon, Clifton, NJ (US);
Gregory E. Plaskon, Clifton, NJ (US);
Howmedica Osteonics Corp., Mahwah, NJ (US);
Abstract
The invention relates to a device which is used for solidly connecting an acetabular cup shell to bone using at least one screw. According to the invention, the screw passes through a hole housing a ring mounted in the shell of the acetabular cup. The ring is mounted within an aperture of the shell and can be rotated therein about the longitudinal axis of the screw. The ring is a split-ring comprising a non-circular outer profile which co-operates with the non-circular profile of the hole which is disposed in the shell. In this way, when the ring is rotated in the hole and wedged in place therein, it is constricted thereby locking the screw to the shell in the desired position. Alternately the screw can have an enlarged thread adjacent it's head end to expand an internally threaded split-ring.