External fixator system
AssigneeStryker European Operations Holdings LLC
InventorsManoj Kumar Singh, Yves Stephane Crozet, Vinzenz Andreas Burgherr, Mark Thomas Dahl
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Abstract
Disclosed herein are external fixation frames for correcting bone deformities. The external fixation frames include a top fixation ring and a bottom fixation ring coupled to one another by at least two struts. A half ring is coupled to bottom fixation ring. The bottom fixation ring is u-shaped. One or more rocker members may be coupled to the bottom fixation ring. The half ring may be hingedly coupled to the bottom fixation ring such that it can rotate with respect to the bottom fixation ring from a first position to a second position.
Claims20
An external fixation frame for correcting a bone deformity, comprising:
- a first fixation ring having a medial portion and a lateral portion;
- a U-shaped bottom fixation ring including a medial anterior projection, a lateral anterior projection, and a rounded posterior section connecting the medial anterior projection to the lateral anterior projection;
- a medial strut coupling the medial portion of the first fixation ring to the medial anterior projection of the U-shaped bottom fixation ring;
- a lateral strut coupling the lateral portion of the first fixation ring to the lateral anterior projection of the U-shaped bottom fixation ring;
- a half ring having a first free end, a second free end, and a transition portion extending between the first free end and the second free end, the half ring coupled to the U-shaped bottom fixation ring so that the half ring is positioned between the first fixation ring and the U-shaped bottom fixation ring;
- a fixation member coupling the half ring to the first fixation ring;
- a first ground-contacting support having a first threaded connecting pin extending proximally therefrom, and a first tread on a bottom surface thereof;
- and
- a second ground-contacting support separate from the first ground-contacting support, the second ground-contacting support having a second threaded connecting pin extending proximally therefrom, and a second tread on a bottom surface thereof;
- wherein in an assembled condition of the external fixation frame, the first threaded connecting pin extends through a first through-hole in the lateral anterior projection of the bottom fixation ring and a first locking nut engages the first threaded connecting pin to couple the first ground-contacting support to the bottom fixation ring, and the second threaded connecting pin extends through a second through-hole in the medial anterior projection of the bottom fixation ring and a second locking nut engages the second threaded connecting pin to couple the second ground-contacting support to the bottom fixation ring.
Dependencies are inferred from the claim text.