Patent ID: 9421676
Filing Date: 2016-08-23
CPC Classification: B25B,Y10T

Claim Text:
1. An extraction tool for extracting a tangless spiral coil insert from a work to which the coil insert is attached, the coil insert having a notch at an end coil section thereof positioned on a surface side of the work, the extraction tool comprising: a mandrel having: a pivotal claw constructed of a plate member, the pivotal claw having: an attachment groove formed in the small-diameter shaft section and the tubular shaft section of the mandrel, the attachment groove extending a predetermined length from an end face of the small-diameter shaft section in an axial direction of the mandrel, the pivotal claw being movably received in the attachment groove; and a biasing means housed within the tubular shaft section and acting on the support section of the pivotal claw, the biasing means having: