US 12,465,409 B2
Bone anchoring device
Lutz Biedermann, VS-Villingen (DE); Wilfried Matthis, Weisweil (DE); and Martin Meer, Vöhringen (DE)
Assigned to BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed by BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed on May 3, 2024, as Appl. No. 18/654,633.
Application 18/654,633 is a continuation of application No. 17/403,343, filed on Aug. 16, 2021, granted, now 11,992,243.
Application 17/403,343 is a continuation of application No. 16/552,661, filed on Aug. 27, 2019, granted, now 11,123,109, issued on Sep. 21, 2021.
Application 16/552,661 is a continuation of application No. 13/336,708, filed on Dec. 23, 2011, granted, now 10,433,877, issued on Oct. 8, 2019.
Claims priority of provisional application 61/426,776, filed on Dec. 23, 2010.
Claims priority of application No. 10196880 (EP), filed on Dec. 23, 2010.
Prior Publication US 2024/0350177 A1, Oct. 24, 2024
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7037 (2013.01) [Y10T 29/49826 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A bone anchoring device comprising:
an anchoring element having a shaft for anchoring in a bone and a head;
a receiving part having a first end and a second end, a recess for receiving a rod, and a bore extending from the first end in the direction of the second end and configured to pivotably receive the head near the second end;
a pressure element movable in the bore to directly engage and exert pressure on the head for locking an angle of the head relative to the receiving part, wherein when the pressure element directly engages the head, respective central axes of the pressure element and the receiving part are configured to stay substantially coaxial such that the pressure element is pivotable together with the receiving part relative to the head; and
a ring that is radially expandable and compressible;
wherein when the head, the pressure element, and the ring are in the receiving part, the pressure element is movable from a first axial position where the ring has a first outer width, towards a second axial position where the pressure element is configured to directly engage diametrically opposite sides of the ring at the same time to cause the ring to adjust to a second outer width different from the first outer width to hold a position of the head relative to the receiving part, and wherein when the pressure element is at the second axial position, at least part of the pressure element is at a same axial height as at least part of the ring to restrict the outer width of the ring from returning to the first outer width.