Patent ID: 8641737

Claim:
A bone anchoring device comprising: a bone anchoring element having a shaft to be anchored in a bone and a head having a spherical surface portion; a receiving part for receiving a rod to be connected to the bone anchoring element, the rod having a longitudinal axis, the receiving part being formed in one piece and comprising: a first bore extending from a first open end to a second end along a first bore axis; two legs having first free ends at the first open end of the bore and extending from the first free ends in a direction of the first bore axis to second ends of the legs wherein the legs are joined to define a U-shaped recess shaped and sized to receive the rod; a second bore having a second bore axis, the second bore being in communication with the first bore and being sized to receive the head with a part of the shaft extending through the second bore; wherein the second bore is configured to block the shaft of the bone anchoring element, when the bone anchoring element is seated within the receiving part, from moving to a position wherein a longitudinal axis of the shaft is alianed with the first bore axis; wherein an angle between the second bore axis and a plane defined by the first bore axis and the longitudinal axis of the rod is approximately 90°; and a pressure member acting onto the head to lock the position of the head relative to the receiving part.