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US 4,093,394 AGranted
Dowel hole-boring jig
OwnerArthur Adamsinventor
Life of this patent
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Abstract
A boring jig is provided having at least one drill bit guidance hole and having two clamps for holding the work. Provision is made for passing the drill bit through the guidance hole in one direction to drill a first work piece held under one clamp, then consecutively to pass the drill through the same guidance hole in the opposite direction to drill a mirror-image hole in a second work piece held under the other clamp.
Claims8
A dowel hole boring jig comprising:
- at least one right circular cylinder longitudinally pierced by at least one round cross-section hole having a selected diameter equal to a dowel hole bit diameter, said hole extending from a first end of the cylinder to the other end thereof;
- a portable base;
- a frame secured to said base and provided with at least one circular cross section aperture shaped, sized and positioned to hold said cylinder in a horizontal position above and parallel to the base;
- first clamp means secured in said frame above and beyond said cylinder's first end whereby a first work piece can be clamped adjacent to the cylinder's first end in positon to be bored by a bit passed through said hole from said other end thereof;
- and
- second clamp means secured in said frame above and beyond said cylinder's other end whereby a second work piece can be clamped adjacent to the cylinder's other end in position to be bored by a bit passed through said hole from said first end thereof.
3 more elements
Dependencies are inferred from the claim text.