Patent ID: 8523946
Filing Date: 2013-09-03
Classification: A61F

Abstract:
1. A spinal cage device for fusion of spinal vertebrae comprising: a cage body having upper, lower, and side walls that a define a cavity, said upper and lower walls having bone growth openings therethrough, said side walls including a posterior sidewall with a piston opening therethrough and an anterior sidewall; a piston having a piston body with anterior and posterior ends, said piston body being insertable along a longitudinal axis into said cavity through said piston opening, wherein said piston body comprise at least two angled surfaces adjacent to said anterior end; at least two fastening member channels extending through said upper and lower walls; at least two fastening members moveable within said at least two fastening member channels between a first disengaged position and a second engaged position; at least one longitudinal guiding member extending into said cavity from at least one of said upper wall and said lower wall; at least two shoulder formed in the piston body, said at least two shoulder having a first thickness; at least two engagement surfaces positioned between said at least one shoulder and said at least two angled surfaces;