Patent ID: 6261292
Filing Date: 2001-07-17
Classification: A61B

Abstract:
A pin comprising:a body with a distal end and a proximal end, wherein said distal end has a first thread presenting crests, said proximal end has a second thread presenting crests, said first thread and said second thread are spaced apart by a smooth portion,the first and second threads being such that the pitch X of the first thread and the pitch Y of the second thread both decrease from the distal end (X.sub.1, X.sub.2 ; Y.sub.1, Y.sub.2) towards the proximal end (X.sub.n, X.sub.n-1 ; Y.sub.n, Y.sub.n-1), and wherein the diameters (d) of the crests of the first thread and the diameters (D) of the crest of the second thread both increase from the distal end (d.sub.1, d.sub.2 ; D.sub.1, D.sub.2) towards the proximal end (d.sub.n, d.sub.n-1 ; D.sub.n, D.sub.n-1), with the values being such that X.sub.1 >X.sub.2 >X.sub.n-1 >X.sub.n >Y.sub.1 >Y.sub.2 >Y.sub.n-1 >Y.sub.n and D.sub.n >D.sub.n-1 >D.sub.2 >D.sub.1 >d.sub.n >d.sub.n-1 >d.sub.2 >d.sub.1.