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US 2010/0310332 A1Published application
Quick core removal hole cutting product
OwnerHenry Serbainventor
Life of this patent
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Abstract
The invention comprises a hole-cutting product with a cup-shaped body and a cutting edge along an open end. The cutting edge comprises a diminishing-radius portion for removing an annular band of material from a workpiece and produces a core remainder in the body that is easy to remove.
Claims3
A hole-cutting product comprising:
- a closed-curvilinear toothed cutting edge enclosing an axis of rotation;
- the cutting edge being positioned substantially on a cutting plane where the cutting plane is perpendicular to the axis;
- the cutting edge having a diminishing-radius portion connected to a constant-radius portion;
- the diminishing-radius portion extending increasingly towards the axis from the constant-radius portion;
- a skirt connected to the cutting edge and enclosing the axis of rotation;
- the skirt extending away from the cutting edge along the axis;
- the skirt transitioning in shape from the closed-curvilinear cutting edge to a substantially circular cylinder as the skirt extends away from the cutting edge.
4 more elements
Dependencies are inferred from the claim text.