Back to results
US 2017/0216979 A1Published application
Drilling Tool
AssigneeSharon-Cutwell Co., Inc.
InventorsJeffrey Prom, Andrew Brill
Life of this patent
Estimating the term…
Abstract
Methods of forming a drill bit or boring tool having a cutting edge that includes a pair of generally smooth curvilinear shaped portions that are positioned near the radial outer portions of the cutting edge and connected to one another by a pair of generally linear portions that traverse a longitudinal centerline of the tool.
Claims16
A method of forming a boring tool comprising:
- providing an elongate body that extends along a longitudinal axis, the elongate body having a first end configured to cooperate with a drive tool and a cutting point formed at a second end of the elongate body opposite the first end;
- forming a first linear portion and a second linear portion along a distal edge of the cutting point, the first linear portion and the second linear portion being on opposite sides of the longitudinal axis;
- and
- forming a first curvilinear contour and a second curvilinear contour in the distal edge of the cutting point, each curvilinear contour being offset in a radial direction from the longitudinal axis of the elongate body and located radially outboard of a respective first linear portion and the second linear portion, such that an only non-tangential discontinuity of the cutting point is defined by a transition between the first linear portion and the second linear portion at an intersection of the longitudinal axis.
1 more element
A method of forming a boring tool, the method comprising:
- providing an elongate body that extends along a longitudinal axis that extends from a first end that is configured to cooperate with a drive tool to a second end that is opposite the first end;
- forming a cutting edge that is defined by the second end of the elongate body;
- and
- shaping the cutting edge to include a first linear portion and a second linear portion that extend in opposite outward radial directions relative to the longitudinal axis of the elongate body and a first curvilinear contour and a second curvilinear contour that are oriented radially outward of a respective one of the first linear portion and the second linear portion such that each curvilinear contour is offset in a radial direction from the longitudinal axis of the elongate body and located radially outboard of a respective first linear portion and the second linear portion and each of the first curvilinear portion and the second curvilinear portion have a similar shape relative to rotation of elongate body about the longitudinal axis.
1 more element
Dependencies are inferred from the claim text.