Patent ID: 8893586
Filing Date: 2014-11-25
Classification: B25B,Y10T

Abstract:
1. A fastener extraction device for attachment to a driver tool having a rotating shank to drive a fastener into a surface, the fastener extraction device comprising: an elongated main body adapted to be attached to the driver, said main body including a plurality of electromagnets; a carriage carried within said body; a plurality of grasping arms each having an extraction guide extending therefrom, said plurality of grasping arms pivotably attached to said carriage with each said grasping arm biased by a bias spring; an actuation collar rotatably attached to said elongated main body and in operative contact with said grasping arms, said actuation collar including a plurality of collar magnets in operative communication with said electromagnets; a switch; and a controller coupled to said switch and said electromagnets, said controller supplying a train of electrical pulses to said electromagnets to control the magnetic orientation of said electromagnets relative to the magnetic orientation of said collar magnets to rotate said actuation collar; wherein said elongated main body, said carriage, and said actuation collar are configured to receive the rotating shank therethrough, such that when said switch is placed in a first state, said controller generates a first pulse train to rotate said actuation collar to a first position, whereby said grasping arms are pivoted to form an extraction aperture about the fastener, and when said switch is placed in a second state said controller generates a second pulse train to rotate said actuation collar to a second position, whereby said grasping arms are pivoted away from the fastener.