Patent ID: 8702362

Claim:
A fastening device using an unconventional bolt, to connect two nested profiled components that include a first component and a second component, the first component and the second component having same shape and size and forming a hollowed column body, the first component comprises a first edge and a second edge substantially parallel to each other; the second component comprises a third edge and a forth edge substantially parallel to each other; the first edge connecting to the third edge forming a first twin-layers side wall, and the second edge connecting the forth edge forming a second twin-layers side wall; wherein the unconventional bolt comprises a main body with a first cross section and two ends, each end comprises a head coaxially connected to the main body, and a threaded rod coaxially connected to the head, the head has a noncircular cross section, and the first cross section of the main body is contained within the noncircular cross section of the head, and two nuts for connecting to the two ends of the unconventional bolt, the first twin-layers side wall is provided with a first through hole, and the second twin-layers side wall is provided with a second through hole aligned with the first through hole, the first through hole and the second through hole having a shape and a size adapted to receive the noncircular cross section of the heads of the unconventional bolt; each head of the unconventional bolt rests against an inner surface of a twin-layers side wall after being inserted through the through holes and rotated to be misaligned with the through holes; two nuts are respectively screwed on two threaded rods of the unconventional bolt that extend to outside of the twin-layers side walls of the column body.