Variable angle spinal screw
Patent 5499983 Issued on March 19, 1996. Estimated Expiration Date: 
February 23, 2014. 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.
February 23, 2014. 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 3343612 Sacral fixation device Spinal fixation device Spinal joint Orthopaedic device with angularly adjustable anchor attachments to the vertebrae Lateral offset connector for spinal implant system Three dimensional spine fixation system Top tightening clamp assembly for a spinal fixation system Patent #: 5282801 InventorAssigneeApplicationNo. 200635 filed on 02/23/1994US Classes:606/61, Spinal positioner or stabilizer403/298, Fluted or splined section606/73Threaded fastener elementExaminersPrimary: Pellegrino, Stephen C.Assistant: Markow, Scott B. Attorney, Agent or FirmInternational ClassesA61B 017/70A61B 017/86 AbstractA spinal fastening apparatus for use in spinal fixation systems, comprising a bone screw, a collar and a locking pin. The bone screw has a threaded shaft portion with a generally longitudinal axis and a head portion having an eyelet with a central bore. The collar is generally U-shaped with a transverse axis and a slot adapted for placement over the eyelet portion of the screw. The elongated locking pin has an outer surface with gripping means on at least a portion of the outer surface and is sized and shaped to be slidably inserted through the eyelet. Surface portions of the collar and eyelet each include means for engaging the gripping means of the pin when the pin is inserted through the eyelet bore and the eyelet occupies the slot of the collar. The collar is capable of pivoting in relation to the eyelet to adjust for angulation between the longitudinal axis of the threaded shaft and the transverse axis of the collar and being locked into a selected angled position. | |
