Transition Metal Nitride Coated File
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United States of America Patent
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Issued Date -
Jun 28, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 23, 2005
priority date (Note) -
Abandoned
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Abstract
A hand operated file is provided with a thin ceramic coating of a transition metal nitride, such as vanadium nitride and/or zirconium nitride, on its teeth. The coating may be 20 um or less, thereby not altering the macro dimensions of the file. The coating may be applied using a vapor deposition process such as physical vapor deposition, and advantageously via a physical vapor deposition process where the file body does not exceed a temperature of about 300.degree. F. The coating helps prevent galling, thereby increasing the useful life of the file.
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