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US 5,099,933 AGranted
Drill bit for drilling along arcuate path
AssigneeVermont American Corporation
InventorsThomas O. Schimke, Wilfred M. McCord, Jr.
Life of this patent
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Abstract
A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of a unique two piece construction permitting selective materials to be utilized in the shank an cutting head portions.
Claims5
A drill bit for drilling along an arcuate path, comprising:
- a shank;
- and
- a cutting head, defining
- a. a forward-projecting central point;
- and
- b. a forward cutting edge;
- a side cutting edge;
- and a rear cutting edge;
- wherein the forward cutting edge and side cutting edge intersect at a rounded corner, and the side cutting edge and rear cutting edge intersect at a rounded corner to form a single, continuous cutting edge.
6 more elements
Dependencies are inferred from the claim text.