US Patent 9458639 Metal roof safety anchor device

A safety anchor device attachable to a metal roof is provided in one-piece construction and is noninvasively attached to a metal roof. The device leaves no marks or flaws in or on the roof or roof structure. The device has a substantially tetragonal beam. Rods extended from the beam slidingly engage raised ridges in a metal roof panel, typically at a roof ridge or at any other open-ended roof panel. A closed rounded end of a u-loop is permanently affixed to the tetragon beam and faces downwardly toward the metal roof panel. Objects, equipment and people can be linked to the u-loop to prevent falling.