Patent ID: 7354350

Claim:
A tool for finishing a previously created thread, such as an internal thread, without cutting, comprising: a) at least one thread-forming portion that rotates about a tool axis, the thread-forming portion having multiple forming wedges; b) wherein the forming wedges in cross-section comprise two flanks that diverge from one another beginning at a forming wedge tip, the forming wedge tip being shaped as any of an acute angle, a rounded region, or a flattened region; c) wherein at least one of the two flanks include at least one expansion for positioning the forming wedge in the previously created thread; d) wherein the plurality of forming wedges exhibits substantially the same expansion with substantially the same cross-sectional shape in a forming region that extends from the forming wedge tip of each forming wedge to the expansion, such that the cross-sectional shape is convexly curved in a first section, concavely curved in a second section, and convexly curved again in a third section.