Patent ID: 7634844

Claim:
A prewinder apparatus selectively attachable to a drive tool for installation of a helical coil insert, the prewinder apparatus comprising: an adapter member attachable to the drive tool having at least one window opening; a stop regulator having: a first tubular portion adapted to be slidably received within the adapter member and rotatable with respect to the adapter member; a second tubular portion having a diameter larger than a first tubular portion diameter and extending outwardly through the at least one window opening to permit manual contact with an outer face of the second tubular portion to manually rotate the stop regulator; first and second end faces of the second tubular portion that are both axially restrained and rotatably disposed within the adapter member; an axial threaded through aperture; and opposed edges defined by the window opening, the opposed edges operating to independently contact one of the first and second end faces of the second tubular portion to prevent axial displacement of the stop regulator with respect to the adapter member; and a stop member having a flange defining a stop face, a tubular body extending from the flange having continuous external threading, and a smooth wall internal aperture extending throughout a stop member length, the external threading engageable in the threaded through aperture of the stop regulator permitting infinitely adjustable axial displacement of the stop member throughout a tubular body length by manual rotation of the stop regulator; a tubular sleeve rotatably disposed in the internal aperture and adapted to engage a drive element of the tool, the tubular sleeve including a hollow portion having a longitudinal slot; and a mandrel slidably disposed within the hollow portion of the sleeve having a threaded first end adapted to engage the helical coil insert and a second end, the second end having a transversely extending pin slidably received in the longitudinal slot, the mandrel co-rotatable with the tubular sleeve and axially displaceable until the pin contacts the stop face defining a selectable displacement of the threaded first end.