Hole saw guide
OwnerRamon William Chaney, Sr.inventor
Life of this patent
Estimating the term…
Abstract
A hole tool guide assembly (10) for use with a hole saw (20) includes a conically shaped core member (12) with a central longitudinal aperture (24) and an offset parallel aperture (32) to receive a pilot of a hole saw. A coil spring (18) biases the member (12)--against a work piece within an existing hole (62) to resize and reposition a new hole (67) through the work piece (60).
Claims9
A hole saw guide assembly for use in combination with a hole saw for enlarging an existing hole in a work piece, said hole saw guide assembly comprising:
- a generally conically shaped core member having a conically shaped first side wall section and a first longitudinally extending central aperture therethrough from a top end to a bottom end and being sized to slidably receive a pilot of the hole saw;
- said core member having a second longitudinal aperture radially spaced from said central aperture and also extending from the bottom end and extending through the conically shaped side wall section;
- a second wall section diametrically opposite said second longitudinal aperture and being generally arcuate in shape to be in proximity to an inner diameter surface of the hole saw;
- a first spring for seating against said bottom end and interposable between said member and the hole saw to provide bias of said member outward from the hole saw to engage the existing hole in the work piece as said hole saw is pressed against said work piece with its pilot extending through a select one of said first and second longitudinal apertures.
A hole saw and guide assembly for use for enlarging an existing hole in a work piece, said hole saw and guide assembly comprising:
- a hole saw having a cylindrical shaped cutting edge at the forward edge of a cylindrical shaped body, said hole saw body having a rearward end wall connected to a mounting mandril with a central aperture therethrough;
- a cylindrical pilot shank extending through the central aperture in said mandril and passing through said hole saw and extending forwardly beyond said forward cutting edge;
- a coil spring seat mounted on said rear wall for seating a rear end of a coil spring about said cylindrical pilot;
- a generally conically shaped core member having a conically shaped side wall section and a longitudinally extending aperture therethrough from a forward end to a rearward end sized to freely slidably engage and receive said cylindrical pilot shank and to disengage from said pilot shank at its forward end;
- said rearward end of said core member seatable against said spring to provide bias of said core member outward from the hole saw to engage the work piece at the peripheral edge of the existing hole in the work piece as said hole saw is pressed against said work piece with its pilot extending through said longitudinal aperture.
Dependencies are inferred from the claim text.