Patent ID: 9730804
Date: 2017-08-15
CPC Classifications: A61B,A61F

Claim:
1. A spinal fusion device for implantation between spinal vertebrae, the spinal fusion device comprising: a cage member having a wall with opposed upper and lower surfaces, an outer side surface, and an inner side surface defining a central opening, wherein the wall includes an aperture; an anchoring fastener; a locking fastener; a locking member comprising a head positioned within the central opening such that the head engages the inner side surface, the locking member comprising a shaft that extends from the head and into the aperture; and a generally planar plate member attached to the outer side surface, the plate member having an inner surface that is fixed relative to a body of the plate member and defines an angled aperture for receiving the anchoring fastener, the body comprising a central aperture for receiving the locking fastener, wherein the anchoring fastener includes a head portion and a shank portion that is inserted into the angled aperture at a predetermined angle such that an outer surface of the head portion engages the inner surface, wherein the locking fastener includes a head portion and a shank portion that is inserted through the central aperture of the plate member and into the shaft such that the head portion of the locking fastener partially overlaps the head portion of the anchoring fastener to prevent the anchoring fastener from becoming displaced and lock the spinal fusion device in position, the shank portion of the locking fastener comprising first and second threaded portions that are spaced apart by an unthreaded lag portion.