Flat drill bit with opposing vertical cutting edges

A drill bit for use with a drill to perform a cutting operation, comprising:

• a shaft having first and second ends, said first end being shaped to be engaged by the drill, and a second end opposite said first end, said shaft having a longitudinal axis of rotation about which the drill bit rotates during the cutting operation;
• and
• a drill bit head integrally connected to said second end of said shaft, said drill bit head having:
• a top portion attached to said second end of said shaft;
• a substantially flat front face parallel to said longitudinal axis of rotation;
• a substantially flat back face opposite said front face and parallel to said longitudinal axis of rotation;
• a straight and flat left side portion between said front and back faces, said left side portion being parallel to said longitudinal axis of rotation, said left side portion being at an angle relative to said front and back faces, said left side portion intersecting said back face and defining an acutely angled, continuous left cutting edge therebetween, said left side portion intersecting said front face defining a first obtuse angle therebetween;
• a straight and flat right side portion between said front and back faces, said right side portion being parallel to said longitudinal axis of rotation, said right side portion being at an angle relative to said front and back faces, said right side portion intersecting said front face and defining an acutely angled, continuous right cutting edge therebetween, said right cutting edge being opposite said left cutting edge, said right side portion intersecting said front face defining a second obtuse angle therebetween opposite said first obtuse angle;
• and
• a bottom portion opposite said top portion and extending between said left and right side portions, said bottom portion having a bottom left section connected to said left side portion defining one of an obtuse angle and a right angle therebetween and a bottom right section connected to said right side portion defining one of an obtuse angle and a right angle therebetween, said bottom left section and said bottom right section meeting at approximately said longitudinal axis of rotation, said bottom left section being at an angle relative to said front and back faces, said bottom left section intersecting said back face and defining an acutely angled left bottom cutting edge therebetween, said left bottom cutting edge being continuous with said left cutting edge, said bottom left section intersecting said front face defining an obtuse angle therebetween, said bottom right section being at an angle relative to said front and back faces, said bottom right section intersecting said front face and defining an acutely angled right bottom cutting edge therebetween, said right bottom cutting edge being continuous with said right cutting edge and being continuous with said left bottom cutting edge, said bottom right section intersecting said front face defining an obtuse angle therebetween.

A method of cutting a depression in a work piece with a drill bit having an axis of rotation and a flat drill bit head with first and second side cutting edges parallel to the axis of rotation and a bottom cutting edge extending between the first and second side cutting edges, comprising the steps of:

• positioning the drill bit head with the bottom cutting edge adjacent to the work piece;
• rotating the drill bit head about the axis of rotation, the drill bit head being rotated by a drill mechanism with the first and second side cutting edges and the bottom cutting edge moving about the axis of rotation;
• moving the bottom cutting edge of the rotating drill bit head into engagement with the work piece;
• cutting and removing material from the work piece with the rotating bottom cutting edge to form a bottom of a depression;
• cutting and removing material from the work piece with each of the first and second side edges to form sidewalls of the depression, the depression having a first width;
• and
• after initially forming the sidewalls of the depression, moving the rotating drill bit head in a lateral direction into engagement with the sidewalls to cut with each of the first and second side cutting edges material from the sidewalls and increase the width of the depression greater than the first width.