Transcutaneous pin for fixation of a bone part or fragment
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United States of America Patent
Stats
-
Dec 18, 1990
Issued Date -
N/A
app pub date -
Jan 23, 1990
filing date -
Oct 13, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transcutaneous fixation pin includes a threaded portion with flutes evenly spaced over the circumference of the pin at the anterior end of the threaded portion so as to perform a tapping operation when the end of the threaded portion penetrates a bone fragment. The flutes take the form of a notch creating a cutting edge of the tap, with clearance relief being provided behind the cutting edge of the tap which approaches the centerline of the pin until it reaches the next notch, so as to form a clearance angle. In a modification the flutes are disposed helicoidally in relation to the axis of the thread, with the helix and the thread being pitched in the same direction.
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