Strut joint for an external fixator

Details Strut joint for an external fixator Strut joint for an external fixator

2008-10-17

2011-11-22

Robert, Eduardo C (Department: 3733)

Surgery

Instruments

Orthopedic instrumentation

Reexamination Certificate

active

08062293

ABSTRACT:
A ball joint for use with an external fixator has a sleeve in engagement with a rod of a strut for the external fixator. A ring insert and a blocking element are provided, having a combined circumferential surface being able to be introduced into a hole of a ring of an external fixator. The ring insert and blocking element have complementary wedge surfaces allowing a relative radial displacement therebetween to enlarge the diameter of the combined circumferential surface for blocking the ball joint inside the hole. Additionally the sleeve comprises a spherical hollow ball portion with concentrical inner and outer spherical portions, wherein the outer spherical portion engages a complementary spherical socket of the blocking element and wherein the inner spherical portion is engaged by a ball nut. A connection element extends through the sleeve, blocking element and ring insert, wherein a radial displacement and axial displacement of the ring insert and blocking element are activated by the connection element.

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