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,
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.
대표청구항▼
I claim: 1. 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 i
I claim: 1. 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. 2. A drill bit dresser as recited in claim 1, wherein: the dresser body interior has an elongated vertical interior channel formed therein on each dresser body side at the dresser body front, extending from the dresser body bottom to the flange; wherein each dresser body side has an elongated vertical exterior channel formed at a junction of each side and the dresser body rear, each elongated vertical exterior channel extending from the dresser body bottom to a point below the dresser body top; wherein the holding clamp front wall has two opposite side walls extending rearward a desired distance toward the holding clamp rear, said opposite side walls adapted to fit into the dresser body interior channels; wherein the holding clamp rear wall has two opposite side walls extending rearward a desired distance toward the holding clamp front, said side walls forming a portion of the holding clamp sides, said rear wall side walls adapted to fit over the dresser body exterior channels. 3. A drill bit dresser as recited in claim 2, wherein: the holding clamp front wall cross bar has a forward element attached thereto, said forward element having the shape of an inverted "V" facing downward toward the holding clamp bottom. 4. A drill bit dresser as recited in claim 3, wherein: an elongated, upright cradle in said sanding shoe interior and extending from the sanding shoe bottom to top, said cradle having an elongated opening parallel to the sanding shoe longitudinal axis and opening toward the sanding shoe rear, wherein the sanding shoe front has two vertical longitudinal front channels opening into the sanding shoe interior, each said front channel being adjacent a sanding shoe side. 5. A drill bit dresser as recited in claim 4, further comprising: a roll of sand paper in said cradle, said sand paper being drawn out of the cradle opening and threaded through the sanding shoe front channels across the sanding shoe front. 6. A drill bit dresser as recited in claim 4, wherein: the sand paper has an aluminum oxide grit.
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