Patent ID: 7958944
Filing Date: 2011-06-14
Classification: B25B

Abstract:
1. A discontinuous drive power tool assembly for generating rotational torque, the tool assembly comprising: a spindle having a first end portion and a second end portion, the first end portion being configured to engage and rotate an object; a pulse hammer selectively engagable with the second end portion of the spindle; a motor including a motor shaft having a first end portion engagable with the pulse hammer, the motor being configured to rotate the pulse hammer; and a rotational position sensor disposed adjacent the motor, the rotational position sensor being configured to measure the rotational position of a second end portion of the motor shaft which is opposite the first end portion of the motor shaft during operation of the tool assembly, wherein the rotational position sensor comprises a magnet mounted to the second end portion of the motor shaft and an integrated circuit constructed and arranged to detect a rotational position of the magnet relative to a longitudinal axis of the motor shaft.