Drill bit dresser
OwnerLawrence M. Douglasinventor
Life of this patent
Estimating the term…
Abstract
A drill bit dresser having a dresser body, a holding clamp slidably joined to the dresser body, and a sanding shoe pivotally attached to the dresser body. The dresser body has means for changing the rake angle of the sanding shoe to accommodate different drill types. A drill bit, leading end first, is inserted into the dresser body and held in a desired positioned by the holding clamp. The sanding shoe is pivoted to the dresser body and engages the drill bit leading end in a vertical up and down motion.
Claims6
A drill bit dresser for a twist drill having an elongated, generally cylindrical body with a rear shank end, adapted to being held in a chuck, and a pointed leading end, said drill bit body having two helical channels extending substantially the length of the body and each terminating in a drill bit face, and angling up to a point forming the drill bit leading end, said drill bit faces providing drill bit cutting edges, comprising:
- a dresser body having a front, rear, left side, right side, top, and bottom, said front, rear, sides, top and bottom defining a hollow dresser body interior, further comprising:
- a generally planar flange inserted into the dresser body top and extending forwardly from the dresser body front and lying in a plane coincident with a dresser body top plane, said flange having a bottom surface with two apertures formed therein, a first aperture adjacent the dresser body front and right side and a second aperture positioned directly forward of the said first aperture;
- a V-shaped chute within the dresser body interior extending from the dresser body rear downwardly to the dresser body front;
- a bottom aperture well formed in the dresser body bottom, said the bottom aperture well having a protrusion formed therein and extending downwardly;
- a sanding guide pin holder fixedly attached to the dresser body right side and extending forward of the dresser body front and downwardly past the dresser body bottom, said pin holder bottom having a pin holding aperture formed therein;
- an elongated pin with two ends, one end inserted into the pin holding aperture and the other pin end is inserted into one of the flange apertures;
- a holding clamp slidably joined to the dresser body and having a front wall, rear wall, left side, right side, top, and bottom, said front, rear, sides, top and bottom defining a hollow holding clamp interior, wherein said holding clamp front wall has a cross bar adjacent the holding clamp top and extending from left side to right side, wherein said holding clamp front wall has a generally rectangular aperture formed centrally therein below the holding clamp front wall cross bar, wherein the holding clamp rear wall has a cross bar adjacent the holding clamp top and extending from left side to right side, said rear wall cross bar having an inverted “V” shaped groove facing downward toward the holding clamp bottom, wherein the holding clamp rear wall has a generally rectangular aperture formed centrally therein and extending from the rear wall cross bar to the holding clamp bottom, wherein the holding clamp interior has a protrusion formed on the holding clamp bottom, wherein a compression spring having two ends is inserted into the holding clamp interior and fitted, at one end, over the holding clamp interior bottom protrusion, the other spring end being fitted over the dresser body, bottom aperture well protrusion;
- and
- a sanding shoe pivotally attached to the dresser body, said sanding shoe having a front, an open rear, left side, right side, top, and bottom, said front, rear, sides, top and bottom defining a hollow sanding shoe interior, wherein the sanding shoe has an elongated sleeve formed at the junction of the sanding shoe front and right side, said sanding shoe sleeve slidably fitted over and engaging the dresser body pin.
Dependencies are inferred from the claim text.