Patent ID: 7849766

Claim:
A method for driving a screw with a screwdriver during a surgical procedure, comprising: Gaining access to a bone inside a human body; engaging a screwdriver with a screw, wherein the screwdriver comprises a shaft adapted to engage the screw, a handle, and a gearbox; and rotating the handle at a first rate, thereby causing the shaft to rotate at a second rate, wherein the screw is driven into the bone at the second rate, wherein the gearbox comprises an input end attached to the handle and an output end attached to the shaft, the gearbox further including an input gear affixed to the input end, an output gear affixed to the output end, a first connecting gear and a second connecting gear connected to each other, the first connecting gear being operatively engaged with the input gear and the second connecting gear being operatively engaged with the output gear, the gears being arranged so as to cause rotational motion of the output end at a first rate due to rotational motion of the input end at a second rate.