Patent ID: 11963698
Assignee: BIEDERMANN TECHNOLOGIES GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A bone anchoring device comprising:
a bone anchoring element comprising a head and a shank;
a receiving part for coupling a rod to the bone anchoring element, the receiving part having a first end, an opposite second end below the first end, a central axis extending through the first end and the second end, a channel at the first end for receiving the rod, and an accommodation space for receiving the head; and
a pressure element positionable in the receiving part to exert pressure on the head;
wherein a seat for the head has at least a first portion that is movable relative to the pressure element and relative to other portions of the receiving part;
wherein when the head and the pressure element are in the receiving part and the pressure element is at a first position, a flexible section is in a flexed configuration while the pressure element and the first portion of the seat act together to exert a compressive pre-load including axially upwardly and downwardly directed forces on the head to hold the head at a temporary angular position relative to the receiving part, while the head remains movable in the receiving part to a configuration where the head is substantially free from one of the axially upwardly or downwardly directed forces to release the compressive pre-load thereupon; and
wherein the pressure element is movable from the first position to a locking position where the angular position of the head relative to the receiving part is locked, and wherein the flexible section is positioned farther radially from the central axis when the pressure element is at the locking position than when the pressure element is at the first position.