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US 5,941,706 AGranted
Variable depth medical drill and method of making the same
OwnerRobert S. Urainventor
Life of this patent
Estimating the term…
Abstract
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.
Claims20
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.
A medical drill bit comprising:
- an elongated shaft having a cutting end and an attachment end;
- a material removal flute extending from said cutting end toward said attachment end wherein said elongated shaft includes a flute area where said material removal flute is present and a non-flute area where said material removal flute is not present;
- and
- at least one depth indicating colored band extending circumferentially around a portion of said elongated shaft, said colored band including a circumferentially extending groove in said non-flute area and a color material in said groove.
1 more element
A method of making a medical drill bit comprising the steps of:
- forming an elongated shaft with a cutting end and an attachment end;
- cutting at least one circumferential groove in said elongated shaft;
- cutting an axial flute portion in said elongated shaft so that it intersects with said at least one circumferential groove;
- and
- filling at least a portion of said groove with colorant material.
2 more elements
Dependencies are inferred from the claim text.