Abstract: An element forming a suspension joint and torsion spring, characterized in that it comprises an outer tubular sub-frame, an inner tubular sub-frame and an intermediate connecting sleeve made from an elastomer material which is joined without any possible slippage of the outer and inner sub-frames; said elastomer sleeve comprises at least two cell structures extending along the circumference thereof, whereby the radial rigidity of the joint is reduced in a significant manner in at least a number of directions without significantly reducing the torsional rigidity thereof.

Abstract: The tire mold having a surface 5 of open porosity which covers at least in art certain of the molding surfaces 10 and 20 in order to assure the venting of the mold.