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US 8,025,466 B2Granted
Removable countersink bit
OwnerMarty D. Huntinventor
Life of this patent
Estimating the term…
Abstract
A removable countersink bit comprises a body, a flange, at least one clamp, and a plurality of cutting teeth. The removable countersink bit creates countersink holes for receiving manhole fixtures and the like.
Claims19
A countersink bit comprising:
- a substantially cylindrical body having a first end, a second opposite end and at least one longitudinal split traversing the body between said ends;
- at least one clamp attached to the body at the split;
- a flange attached to one end of the body, said flange comprising at least one cutter.
A removable masonry countersink bit comprising:
- a substantially cylindrical body having a first end and a second opposite end, wherein said body is defined by two halves further comprising a first split traversing the body between said ends and a second split traversing the body between said ends substantially opposite the first split;
- at least one clamp attached to the body at the first split for connecting each of said halves;
- at least one hinge disposed at the second split and connected to each of said halves;
- at least one flange attached to one end of the body, said flange comprising at least one cutter.
1 more element
A method of drilling a countersink hole comprising:
- attaching a countersink bit to a primary bit wherein said countersink bit comprises a substantially cylindrical body, at least one longitudinal split traversing the body, at least one clamp attached to the body at the split;
- and a flange attached to one end of the body, said flange comprising at least one cutter;
- drilling a primary hole with said primary bit;
- and
- advancing said countersink bit to the substrate and rotating said countersink bit about the primary hole thereby causing said countersink bit to drill a countersink hole in the substrate.
2 more elements
Dependencies are inferred from the claim text.