Hole saw slug removal device
OwnerAbelardo Jassoinventor
Life of this patent
Estimating the term…
Abstract
The hole saw slug removal device is constructed to fit within a hole saw and provides for automatic ejection of waste slugs from within the hole saw. The hole saw slug removal device has two discs affixed on either end of a compression spring. The device is inserted into the hole saw, and one disc retains the compression spring within the hole saw by locking onto the drill bit or against the inner surface of the hole saw. Upon operation of the hole saw, the spring compresses and the other disc is pushed down by the force of the sawing, the spring expanding to automatically eject the slug from within the hole saw when the saw is withdrawn from the workpiece. The hole saw pilot bit may have an annular groove on the shank between the flat(s) and fluted cutting edges that is engaged by one of the discs.
Claims17
A hole saw slug removal device for automatic slug ejection, comprising:
- a hole saw pilot drill bit having an upper shank portion defining at least one flat, a lower portion having fluted cutting edges, and an annular groove disposed between the upper and lower portions;
- a helical compression spring having opposed first and second ends;
- a first annular disc attached to the compression spring at the first end of the spring, the first disc being slidable over the fluted cutting edges;
- and
- a second disc attached to the second end of the compression spring, the second disc being annular and defining an inner circumference, the second disc releasably engaging the groove defined in the pilot drill bit, the compression spring being concentrically disposed around the bit and the first disc slidably disposed about the fluted cutting edges.
A hole saw slug removal device for automatic slug ejection, comprising:
- a hole saw pilot drill bit having an upper shank portion defining at least one flat, a lower portion having fluted cutting edges, and an annular groove disposed between the upper and lower portions;
- and
- an ejector assembly having:
- a helical compression spring having opposed first and second ends;
- a first annular disc attached to the compression spring at the first end of the spring, the first disc being slidable over the fluted cutting edges;
- and
- a second disc attached to the second end of the compression spring, the second disc being annular and defining an inner circumference, the second disc having means for releasably engaging the groove defined in the pilot drill bit in order to attach the ejector assembly to the pilot drill bit, the compression spring being concentrically disposed around the bit and the first disc slidably disposed about the fluted cutting edges.
A hole saw slug removal device for automatic slug ejection, comprising:
- a hole saw pilot drill bit having an upper shank portion defining at least one flat, a lower portion having fluted cutting edges, and an annular groove disposed between the upper and lower portions;
- and
- an ejector assembly having:
- a helical compression spring having opposed first and second ends;
- a slug bearing surface attached to the first end of the compression spring;
- and
- means for releasably attaching the second end of the compression spring to the pilot drill bit, the second disc being annular and defining an inner circumference, the means for releasably attaching engaging the groove defined in the pilot drill bit, the compression spring being concentrically disposed around the bit and the first disc slidably disposed about the fluted cutting edges.
Dependencies are inferred from the claim text.