Precessional drilling and reaming
OwnerMichael J. Scianambloinventor
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Abstract
This document provides novel drills and/or reamers that are well-suited for making holes in a variety of materials including, but not limited to, metals, ceramics, glass, wood, plasterboard, plastics, stone, composites, synthetics, silicon or multi-layered or hybridized substrates. In some embodiments, these drilling devices have some centers of mass that are offset from the axis of rotation. Accordingly, such drills and/or reamers may rotate and cut using a precessional pattern of motion. Precessional cutting devices may display a mechanical wave pattern in relationship to the longitudinal axis of the device. If the cutting device is fabricated from a flexible material, for example Nickel-Titanium, bodily deflection of the device may result during rotation.
Claims35
A cutting instrument configured for industrial usage, the cutting instrument comprising:
- a shank configured to be releasably attachable to a motor to rotate the cutting instrument about an axis of rotation;
- and
- a drill body configured for industrial drilling extending from the shank, the drill body including a shank end where the drill body extends from the shank, a free end at an end of the drill body that is opposite of the shank end, and at least two flutes each extending continuously between the shank end and the free end, each flute of the at least two flutes defined at a respective location around a circumference of the shank end such that the at least two flutes are equispaced around the circumference with respect to each other, the drill body including a cutting portion between the shank end and the free end, the drill body comprising a plurality of transverse cross-sections, each transverse cross-section of the drill body having a center of mass, the drill body having a center of mass path that is defined by the centers of mass of all transverse cross-sections of the body, wherein a center of mass of a transverse cross-section at the shank end is offset from the axis of rotation, and a center of mass of a transverse cross-section at the free end is closer to the axis of rotation than the center of mass of the transverse cross-section at the shank end.
Dependencies are inferred from the claim text.