Surgical cutting instrument with titanium nitride coating on an inner tubular member
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United States of America Patent
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-
May 8, 1990
Grant Date -
N/A
app pub date -
Feb 23, 1989
filing date -
Feb 23, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A surgical cutting instrument having elongate inner and outer tubular members with distal ends cooperating to cut bodily tissue and aspirate the cut bodily tissue through the inner tubular member includes a coating of titanium nitride formed on the inner tubular member by physical vaport deposition to extend from the distal end of the inner tubular member to the proximal end of the inner tubular member such that the titanium nitride coating forms an elongate bearing surface extending along the length of the surgical cutting instrument preventing cocking or skewing of the inner tubular member relative to the outer tubular member while also preventing galling and possible seizure by distributing or dispersing heat along the surgical cutting instrument.
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