Patent ID: 8348242

Claim:
A coupling system comprising: a plurality of wooden vertical posts, each of the posts having a common length with a horizontal upper end and a horizontal lower end, each of the ends having a post hole, each of the post holes having a common diameter and a common axial length and terminating with an interior closed end, the posts adapted to couple with rail holes each having an axial length in a rail above or to couple with base holes each having an axial length in a base below; and a plurality of coupling component assemblies, each assembly comprising: a cylindrical rod with opposed ends; first and second coil springs, each disposed at a respective one of the opposed ends of the cylindrical rod such that the cylindrical rod is coaxially received within the first and second coil springs, each coil spring having an exterior end fixed to the cylindrical rod, and an interior end of a reduced diameter; a first fastener coaxially received within the interior end of the first coil spring and extending therefrom; and a second fastener coaxially received within the interior end of the second coil spring and extending therefrom; the rod having an axial length greater than the length of each coil spring and less than the axial length of each respective post hole, rail hole or base hole; wherein the first coil spring is positioned within and attached within the post hole of a respective one of the plurality of posts by the first fastener, the second coil spring is positionable within and fastenable within a respective rail hole or base hole by the second fastener such that the exterior end of each coil spring extends a short distance outside of the respective post hole, rail hole or base hole; and wherein exterior end of adjacent opposing coil springs disposed at the opposing upper and lower ends for each post are adapted to rotatably interlock and join the plurality of posts with the rail or base when rotated with respect to each other about a common axis of rotation.