US Patent 7465317 Expandable spinal implant

An expandable spinal implant including a first member and a second member. The first member has first and second arms. The first and second members are pivotally coupled to each other for relative movement about a rotation axis between a closed position for inserting the implant into a spine and an expanded position for providing structural support to the spine. The expandable implant includes a locking mechanism for arresting relative movement between the first member and the second member.