Patent ID: 8679116

Claim:
An external bone fixing member comprising: an external reconstruction plate having multiple locking portions and each locking portion having an inner threaded hole and a through hole which shares a common axis and communicates with the inner threaded hole, a diameter of the through hole being smaller than that of the inner threaded hole; a connection member being a ring-shaped member and having an outer threaded section and a polygonal section, the connection member having an inner threaded hole and a reception hole which communicates with the inner threaded hole of the connection member, the reception hole having a concaved and curved inner wall, the connection member connected to the external reconstruction plate by engaging the outer threaded section with the inner threaded hole of the locking portion of the external reconstruction plate; a screw having a shank which has outer threads, a head connected to an end of the shank and having a convex and curved outer wall, a first recess defined in a top of the head, the screw extending through the connection member and the external reconstruction plate, the head of the screw being accommodated in the reception hole of the connection member, the concaved and curved inner wall being matched with the convex and curved outer wall so that the screw is pivotable; a pressing plate having a locking member contact surface defined in a top thereof and a concaved screw contact surface defined in an underside thereof, the pressing plate located in the connection member, the concaved screw contact surface being in contact with the head of the screw, and a locking member having outer threads in an outside thereof and a second recess defined in a top thereof, a washer contact surface ( 53 ) defined in an underside of the locking member, the locking member connected to the connection member by engaging the outer threads with the inner threaded hole, the washer contact surface providing a compression force to the pressing plate to connect the external reconstruction plate, the connection member, the screw and the pressing plate.