Patent ID: 7896569

Claim:
A joint arrangement comprising: a first joint part having two mutually parallel portions with substantially flat opposed faces defining between them a gap, one of the opposed faces including a first sawtooth profile extending around a joint axis substantially perpendicular to the opposed faces; a shaft journal extending across the gap between the two parallel portions along the joint axis of said first joint part; a tensioning mechanism operatively connecting the two parallel portions of said first joint part, and actuable via said shaft journal to tension together the two parallel portions; and a second joint part formed as a flat ring with a radial slot and having a side face perpendicular to an axis of the flat ring and formed with a second sawtooth profile extending around the axis of the flat ring; wherein said second joint part can be assembled into the gap of said first joint part by slipping the radial slot of said second joint part over said shaft journal with the second sawtooth profile facing the first sawtooth profile such that said second joint part is rotatable within the gap about said shaft journal, and such that actuating said tensioning mechanism engages the first sawtooth profile formed on said first joint part with the second sawtooth profile formed on said second joint part for restraining said second joint part relative to said first joint part.