Abstract: This disclosure relates to a tool for rotating elements, such as nuts, bolts, screws or like fasteners, and includes a ring having ratchet teeth, the ring being driven by a lever, a pawl carried by the lever for engaging the ratchet teeth, a flexible tension-applying member in at least partial surrounding relationship to the ring, means for supporting the pawl, and the tension-applying member being disposed between the supporting means and the lever whereby upon movement of the lever in a first direction the pawl rotates the ring through the engagement of a tooth of the ring and the tension-applying member deforms slightly to frictionally grip the ring.

Abstract: A power wrench having at least a partially annular drive head connected at first and second pivots through a first of a pair of telescopic members and to a third member, respectively, the third member being connected by a third pivot to the second member, and upon a relative linear telescopic motion of the first and second members, the drive head is rotated through a predetermined arc under the control of the third member.

Abstract: Methodwise this disclosure relates to the manufacture of workpieces having polygonal inner or outer contours based upon radii of predetermined inner and outer circles with n being the number of angles of the desired polygon, the method including the steps of rotating a workpiece about its axis, moving the tool along an ellipsoidal path while in contact with the rotating workpiece with tool travel along the ellipsoidal path having velocity varying generally sinusoidally as a function of tool location, said ellipsoidal paht is radially offset from the workpiece axis of rotation and its width generally corresponds to the difference between said inner and outer radii, and rotating the workpiece about its axis for a duration of time longer than the duration of movement of the tool along the ellipsoidal path by said factor n.