Abstract: An impact tool includes a housing that includes a motor housing portion, a front housing portion coupled to the motor housing portion, and a D-shaped handle portion extending from the motor housing portion in a direction opposite the front housing portion. The impact tool includes an electric motor supported in the motor housing portion, a battery pack supported by the housing for providing power to the motor, and a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece capable of developing at least 1,700 ft-lbs of fastening torque.

Abstract: A preserved vessel isolated from a human umbilical cord or placenta and lyophilized for use as an allograft which improves blood supply to human tissue without antigenicity.

Abstract: A thread forming screw for cold forming, using primarily compressive forces, internal threads in a workpiece comprised of a low ductility material, such as magnesium and the like, comprises a shank having an entering end and a head end. External threads are disposed on the shank between the entering end and the head end. The external threads define an angular configuration with the angular configuration defining an angle measuring substantially within the range of ninety degrees to one hundred and twenty degrees.

Abstract: The invention relates to the area of machine tools and more particularly relates to an attachment device for detachably mounting an electrode on an electrical discharge machine including a detachable head assembly incorporating an electric drive motor means for selectively rotating the electrode about its longitudinal axis relative to the workpiece.