초록

A medical or dental drill bit with one or more colored bands to indicate the drilling depth. The colored bands include groove portions filled with a color material. The invention also relates to a method of making such a drill bit.

대표청구항 ▼

[ I claim:] [1.] A medical drill bit comprising:an elongated shaft having a longitudinal axis, a cutting end at one of its ends and a rotation attachment end at its opposite end, said shaft further including a flute area extending from near its cutting end toward said rotation attachment end and a n

[ I claim:] [1.] A medical drill bit comprising:an elongated shaft having a longitudinal axis, a cutting end at one of its ends and a rotation attachment end at its opposite end, said shaft further including a flute area extending from near its cutting end toward said rotation attachment end and a non-flute area extending from near its cutting end toward said rotation attachment end;a plurality of depth indicating colored bands extending circumferentially around said elongated shaft in said non-flute area between said cutting end and said rotation attachment end, said colored bands being distinguishable from the color of said elongated shaft and at least two adjacent bands of said plurality of bands being of contrasting colors.