Spinal instruments, particularly for a rod
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United States of America Patent
Stats
-
Aug 17, 1999
Grant Date -
N/A
app pub date -
Sep 5, 1997
filing date -
Mar 6, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a spinal instrument for essentially smooth adjustable connecting rods. The spinal instrument has a nut (5) that clamps receiving and locking assembly (8) to a multi-threaded bone anchor member (1). The receiving and locking assembly (8) has a compressible ring (24) disposed within a clamp (9) having a lower branch (10) and an upper branch (11) coupled between a connecting area (12). The connecting rod fits into the compressible ring (24). With the cavity-ring assembly forming a ball joint, the connecting rod may be clamped into the required angular position. Other features are disclosed.
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