Patent ID: 8684622

Claim:
A coupling pin for fastening together multiple sections, said pin comprising: a carriage member; and a riding member secured to the carriage member, wherein each of said carriage member and said riding member comprises an inclined planar mating surface and form a uniform cylindrical pin when said carriage member and said riding member are mutually inclined longitudinally over inclined planar mating surfaces in a flush manner, the carriage member and the riding member being complementary with respect to each other, and wherein said pin is configured to: (i) position said riding member and said carriage member such that said carriage member and said riding member are mutually inclined longitudinally over the inclined planar mating surfaces to form a uniform cylindrical pin; (ii) assume an insertion/retraction position whereby said carriage member is axially shifted with respect to said riding member; (iii) be inserted into an aperture through said sections; and (iv) assume a load-bearing position whereby said carriage member substantially overlaps said riding member, and wherein the coupling pin is changeable between the insertion/retraction position and the load-bearing position by applying an external axial force at one end of said riding member, and locking mechanism inserted into coaxial bores extending radially through the riding member and the carriage member, securing the riding member to the carriage member when the pin is in the load-bearing position and maintaining engagement between the riding member and carriage member when the pin is in the insertion/retraction position.