Ratchet lock for an intramedullary nail locking bolt
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United States of America Patent
Stats
-
Dec 26, 1995
Grant Date -
N/A
app pub date -
Dec 23, 1991
filing date -
Dec 23, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention includes a ratchet wheel carried by the locking bolt and engaged by a pin carried by the targeting guide. The pin and ratchet wheel permit the locking bolt to rotate in a tightening direction and prevent the bolt from rotating in a direction to cause the bolt to loosen. Therefore, during impact, the bolt is prevented from loosening. After the IM rod is inserted and the surgeon wants to remove the targeting guide, the pin is shifted and locked into a disengaged position with the ratchet wheel to permit the locking bolt to rotate without obstruction. The ratchet pin may be locked in its retracted position.
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