Self-undercut expansion anchor system with improved cutters

Abstract

The present disclosure provides a system to optimally set an anchor and a bullet within a bore hole. The anchor is comprised of at least two cutters connected to and positioned below spreading lamellae of the anchor. The cutters are comprised of a wide edge and a narrow edge, the wide edge having a width that is wider than the circumference of the spreading lamellae to facilitate the setting of the anchor. A space is also initially provided between each of the cutters and the bullet to reduce friction of anchor on the bullet during expansion. During setting, the spreading lamellae of the anchor spread radially over the bullet to set the undercut anchor within the pre-drilled bore hole. In another embodiment, the anchor is comprised of at least two angular cutters having a taper of several degrees to facilitate cutting through the cementitious material of the bore hole.

Dependencies are inferred from the claim text.