Bone saw blade and a method for manufacturing a bone saw blade
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United States of America Patent
Stats
-
Dec 2, 2003
Grant Date -
Oct 23, 2003
app pub date -
Apr 22, 2002
filing date -
Apr 22, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bone saw blade includes a blade body having a cutting section, a hub section and a shank located between the cutting section and the hub section. The blade body is first formed having a substantially uniform Rockwell hardness between approximately R.sub.c 49 and R.sub.c 63 throughout. Next, a cathodic arc process is used to coat the cutting section with a hard, wear-resistant metal nitride coating. During the coating process, ion impingement on the surface of the cutting section creates heat that beneficially anneals the cutting section. Significant annealing of the shank and hub section is prevented during the coating process by stacking the blade bodies together with blade blanks that are formed without cutting sections. The heat generated during coating is insufficient to raise the temperature of the large mass above the annealing temperature of the blade material. The resultant blade has a high strength shank and hub section.
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