Patent ID: 8495807
Filing Date: 2013-07-30
Classification: B25B,Y10T

Abstract:
1. A prewinder apparatus attached to a drive tool for installation of a helical coil insert, the prewinder apparatus comprising: a body connected to the drive tool; an adapter rotatable with respect to the body and releasably connected to the body at operator selected ones of a plurality of rotated positions, the adapter having a plurality of insert engagement threads created on an internal diameter of the adapter and a longitudinal cavity; a prewinder portion slidably displaceable into and out of the body coaxial to a longitudinal axis of the body and the adapter, and biased by a first biasing member toward an extended position; a mandrel axially extensible from the prewinder portion when the prewinder portion is slidably displaced into the body against a biasing force of the first biasing member, the mandrel adapted to engage the helical coil insert to rotatably insert the coil insert; and a threaded insert having outwardly facing threads engaged with the insert engagement threads, the threaded insert non-rotatably retained within the longitudinal cavity of the adapter allowing infinitely adjustable axial displacement of the threaded insert in the longitudinal cavity by rotation of the adapter causing engagement of the insert threads with the insert engagement threads to longitudinally displace the threaded insert.