Hole cutter with axially-elongated aperture defining multiple fulcrums
AssigneeIrwin Industrial Tool Company
InventorsJoseph Thomas Novak, Matthew Christopher Green
Life of this patent
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Abstract
A hole cutter has a cylindrical blade body including a cutting edge and one or more axially-elongated apertures formed within a side wall of the blade body. The axially-elongated aperture is configured to receive a lever, such as a screwdriver, therethrough. Each axially-elongated aperture includes a first fulcrum axially spaced adjacent to the cutting edge, a second fulcrum axially spaced further away from the cutting edge than the first fulcrum, and a third fulcrum axially spaced between the first and second fulcrums. A lever, such as a screwdriver, can be inserted into the aperture and placed against each of the fulcrums to lever slugs out of the interior of the blade body.
Claims37
A hole cutter, comprising:
- a substantially cylindrical blade body defining a cutting edge;
- and
- at least one axially-elongated aperture formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and the axially-elongated aperture,
- wherein the axially-elongated aperture is configured to receive therethrough a lever for removing a work piece slug from an interior of the blade body, and the blade body defines within the axially-elongated aperture a plurality of fulcrums configured for engaging the lever and for levering slugs out of the interior of the blade body by applying a sufficient levering force against the fulcrums to lever a slug towards the cutting edge, the plurality of fulcrums including a first fulcrum axially spaced adjacent to the cutting edge, a second fulcrum axially spaced further away from the cutting edge than the first fulcrum, and a third fulcrum axially spaced between the first and second fulcrums.
A hole cutter, comprising:
- a substantially cylindrical blade body defining a cutting edge;
- and
- at least one axially-elongated aperture formed through the blade body and spaced from the cutting edge such that a portion of the blade body extends between the cutting edge and the axially-elongated aperture,
- wherein the at least one axially-elongated aperture is configured to receive therethrough a lever for removing work piece slugs from an interior of the blade body, and the blade body defines within the at least one aperture first means axially spaced adjacent to the cutting edge for engaging the lever and for levering slugs having thicknesses within a first range of thicknesses out of the blade body by applying a sufficient levering force against the first means to lever a slug towards the cutting edge, second means axially spaced further away from the cutting edge than the first means for engaging the lever and for levering slugs out of the blade body having thicknesses within a second range of thicknesses greater than the first range of thicknesses by applying a sufficient levering force against the second means to lever a slug towards the cutting edge, and third means axially spaced between the first and second means for engaging the lever and for levering slugs out of the blade body having thicknesses within a range of thickness between the first and second range of thicknesses by applying a sufficient levering force against the third means to lever a slug towards the cutting edge.
Dependencies are inferred from the claim text.