US Patent 10935067 Reverse-thread insert anchor for masonry applications

A fastener anchoring system is disclosed. The fastener anchoring system provides for an anchor with first-direction external threading, while a bore through the anchor provides second-direction internal threading. Thus, the anchor is screwed/secured to a substrate in the first direction and unscrewed in the second direction, while the fastener being anchored in the bore is screwed/secured in the second direction and unscrewed in the first direction. As a result, unscrewing the fastener does not urge the unscrewing of the anchor from the substrate.