Power drill

Abstract

A power drill shiftable between at least two operational modes has a drill housing, a brushless dc motor in the housing, a drive spindle rotatable about an axis, and a chuck body adjacent the housing. Two elements interconnected by a screwthread are relatively axially shiftable on relative rotation about the axis, and gripping jaws between the chuck body and one of the elements are relatively shiftable radially of the axis on relative axial shifting of the elements. A drive sleeve rotatable by the motor about the axis is connected to the other of the elements. A member is shiftable between positions corresponding to the operational modes of the power drill. A sensor detects which mode the power drill is in, and motor-control means connected between the sensor and the motor adjusts a parameter of the motor as a function of the mode detected by the sensor.

Dependencies are inferred from the claim text.