US Patent 9976298 Concealed structural post fastening device and method

A post fastening device for mounting a post to a construction surface, the device comprising a base having a planar top surface and a threaded rod extending from the top surface, a tubular member for insertion into a longitudinal axial bore on the bottom end of the post, the tubular member having an upper end and a lower end with internal threads complementary to the threads of the rod, and a dowel rod for insertion into a transverse bore extending through a portion of the post and the tubular member when the tubular member is in the longitudinal bore, the dowel rod being sized to pass through the tubular member and a portion of the post on both sides of the tubular member.