Drill bit sharpener
OwnerSophin Lininventor
Life of this patent
Estimating the term…
Abstract
A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener housing is attached to the motor assembly, and the grinding wheel assembly is rotatably mounted in the sharpener housing and is rotated by the driven assembly. The bit guide assembly is mounted in the sharpener housing above the grinding wheel assembly. An adjusting screw in the bit guide assembly is used to adjust the grinding wheel assembly relative to the bit guide assembly. Multiple bit guide holes correspond to the grinding wheel assembly are defined in the bit guide assembly and allow a drill bit to pass through to abut the grinding wheel.
Claims13
A drill bit sharpener comprising:
- a motor assembly comprising
- a motor with a drive shaft, the motor electrically connected to a power cord and the drive shaft having an upper keyed end that extends vertically out of the motor;
- an upper housing having a top with a hole, a clamping device and a grinder assembly seat, the grinder assembly seat formed on the top of the upper housing and having a sidewall, a center and an inner opening with a diameter, the hole defined in the top of the upper housing at the center of the grinder assembly seat and the upper keyed end of the drive shaft passing through the hole;
- the clamping device attached to the sidewall and adapted to adjust the diameter of the inner opening;
- and
- a lower housing attached to the upper housing to house the motor;
- and a drill bit grinding assembly comprising
- a hollow sharpener housing having a open top and a bottom, a sleeve formed at the bottom of the sharpener housing and the sleeve mounted in the grinder assembly seat of the upper housing;
- a driven assembly comprising
- a spindle having an upper end and a lower end and rotatably mounted in the sharpener housing with the lower end attached to the upper keyed end of the drive shaft and a spring mounted axially to the spindle at the upper end;
- a grinding wheel assembly comprising
- a hollow adjustment shaft has an inner space, a closed upper end and an open lower end, and mounted over the spring on the upper end of the spindle;
- and
- a grinding wheel securely attached to the adjustment shaft;
- and a bit guide assembly comprising
- a guide block mounted in the open top of the sharpener housing, and having a top, a bottom and a center through which passes a vertical axis, a vertical protrusion formed at the center of the guide block, a threaded hole defined in the protrusion at the center of and through the guide block, multiple bit guide holes defined in the top of the guide block and through the guide block;
- and
- an adjusting screw has two ends with a disk attached to one end and the other end screwed into and extending out of the threaded hole to press against the adjustment shaft;
- wherein the guide holes correspond to the grinding wheel so a drill bit can pass through one of the bit guide holes and abut the grinding wheel when the adjustment shaft is rotated.
Dependencies are inferred from the claim text.