Patent ID: 9254516
Filing Date: 2016-02-09
CPC Classification: B21B,B21H,F16B

Claim Text:
1. A method of forming anchors, comprising: roll forming a workpiece having a rod shaped body, that comprises a longitudinal axis running between a first end and a second end thereof, by penetrating the workpiece with two wedge-shaped tools at two points, wherein the two points are arranged on opposite sides of and axially separated by a plane perpendicular to the longitudinal axis of the workpiece, and wherein the two wedge-shaped tools are configured to axially approach the plane as the workpiece is revolved around the longitudinal axis to displace material and cause a diameter of the workpiece to increase in a central region between the two wedge-shaped tools as the workpiece is roll formed; dividing the roll-formed workpiece along the plane to form a first anchor bolt and a second anchor bolt;