Surgical fixation pin tension adjuster
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United States of America Patent
Stats
-
May 8, 1990
Grant Date -
N/A
app pub date -
Apr 17, 1986
filing date -
Apr 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tension adjuster is mounted on and is part of an external fixation device comprising frame segments rigidly supporting fixation pins that pass through and immobilize fractured bones during rehabilitation. This tension adjuster securely attaches the fixation pins to the frame segments and adjustably applies tension along the fixation pins to more rigidly secure the fixation pins and to improve the immobilization of the fractured bones. The tension adjuster comprises a threaded slotted screw attached to the fixation pins and comprises a mounting nut having an aperture through which is drawn the threaded slotted tension screw while adjusting the tension along the fixation pins. A tapered pin extending into the aperture of the mounting nut and into a chamfered slot of the threaded slotted tension screw, guides the threaded slotted tension screw through the mounting nut during tension adjustments. A tension nut rotating upon the threaded slotted tension screw and buttressing the tension mounting nut operates by simple turning motion to draw the threaded slotted tension screw through the tension mounting nut and thereby applying tension along the fixation pins.
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