Patent ID: 8083777

Claim:
A bone anchor assembly securable to an elongated member, the bone anchor assembly comprising: a bone screw comprising a threaded portion and a head portion; a coupling member comprising a first bore, the first bore comprising a seat shaped to polyaxially adjustably receive the head portion, a second bore, and a channel proximally positioned relative to the first bore and in direct communication with the first bore, wherein the channel is shaped to receive the elongated member; and a locking mechanism actuatable to lock the elongated member in a fixed position relative to the channel, the locking mechanism comprising a locking member and an engagement member shaped to slide transverse to the locking member in response to actuation of the locking member to retain the elongated member, wherein the locking member is actuatable within the engagement member and is engaged with the second bore; wherein the engagement member is a wedge member comprising a first oblique surface, wherein the coupling member further comprises a second oblique surface oriented oblique to the first bore, and wherein the first oblique surface is urged transversely along the second oblique surface in response to actuation of the locking member, wherein the coupling member is J-shaped comprising a first wall and a second wall, the second wall including the second oblique surface and being shorter and wider than the first wall, wherein the second bore is located in the second wall, and wherein the engagement member is positionable on the second oblique surface of the second wall.