US 8,021,085 B1 · Engraving tool with a very strong cutter tip to reduce breakage

Abstract

A conical shaped engraving tool has a tip configuration for increased strength that is especially desirable when engraving stainless steel. The improved conical tip consists of a thin V or U shaped slot or channel that touches the central axis of the tool and provides the cutting edge while leaving the maximum amount of material on the tip of the tool for maximum tool strength. A back angle is rotated 90 degrees to the cutting edge so that cutting forces are directed along the cutting edge instead of just on a point for further increasing the tip strength to prevent it from breaking. Also the thin slot is tilted on a slight angle away from a central axis thereby creating a downward force on the cutting edge of the tool when the tool is rotated, which results in pushing burrs into the cut creating an engraved line with better appearance.

Claims10

Dependent claims

A rotary engraving tool comprising:

(a) a cylindrical shaft having a conical end portion terminating in a tip portion positioned at a central axis about which the shaft rotates in a given rotational direction;
(b) a single thin slot formed in said conical end portion and touching said tip portion said single thin slot having a relief to form a cutting edge;
and
(c) wherein said tip portion has a side angle which places the lowest part of the tip portion on the outer periphery of its cutting edge;
and
(d) wherein said tip portion also has a back angle formed into the end of said tip portion;
and
(e) wherein said back angle is rotated 90 degrees to the cutting edge so that cutting forces are directed along the cutting edge instead of just on a point.

5 more elements

Dependencies are inferred from the claim text.

Engraving tool with a very strong cutter tip to reduce breakage

Life of this patent

Engraving tool with a very strong cutter tip to reduce breakage

Life of this patent

Abstract

Claims10