Endoprosthetic bone joint devices
Patent 3992726 Issued on November 23, 1976. Estimated Expiration Date: 
November 23, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 23, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3608096 3651521 InventorsAssigneeApplicationNo. 600475 filed on 07/30/1975US Classes:623/23.4Ball and socket jointExaminersPrimary: Frinks, Ronald L.Attorney, Agent or FirmForeign Application Priority Data1974-08-07 UKAbstractAn endoprosthetic bone joint device, particularly suitable for a finger or toe joint, comprises two cups and a ball or other roller freely located in and between the cups in articulatory engagement. Normally the cups do not wholly encompass the ball, and so allow flexion-extension simulating articulation limited by mutual abutment of relevant portions of the cup rims. For this purpose, at least one of the cup rims is contoured from planar form to provide two mutually-inclined, diametrically-opposed stop surfaces. Various requirements for abduction-adduction function simulation can also be accommodated by curved profiling of said one cup rim between its stop surfaces. | |
