Patent ID: 8403990

Claim:
An expandable spinal implant, comprising: a cage body extending along a longitudinal axis and including at least two movable branches each having first end portions that are interconnected to one another and opposite second end portions that are movable relative to one another, said movable branches including inner surfaces having a plurality of notches configured to mate with complimentary ridges on an expansion member, said inner surfaces cooperating with one another to define a hollow interior of said cage body and including: a first shell portion having a first pair of longitudinal edges and defining a first hollow region between said first pair of longitudinal edges; a second shell portion having a second pair of longitudinal edges and defining a second hollow region between said second pair of longitudinal edges, said first hollow region of said first shell portion cooperating with said second hollow region of said second shell portion to define at least a portion of said hollow interior of said cage body; and the expansion member slidably engaged simultaneously along said first and second pairs of longitudinal edges of said first and second shell portions to transition said cage body toward a transversely expanded configuration as said expansion member is axially displaced between opposing ones of said first and second pairs of longitudinal edges, so that said ridges engage said plurality of notches to lock the expansion member in predetermined axial positions.