Automobile vehicle seat featuring a hinge mechanism attached to a flange on the seat back or seat pan by a joining system

In an automobile seat, a hinge joining system comprising:

• a seat back flange;
• a seat pan flange;
• a hinge mechanism attached to a selected one of the flanges;
• an assembly fastener component connected to the hinge mechanism and passing through an opening in the selected flange, the opening including a raised frusto-conically tapered ductile collar;
• thrust component means connected to the assembly fastener component, the thrust component means having a bore for radially gripping the raised tapered collar and axially pressing the collar against the selected flange;
• the assembly fastener component including a tapered male section fitting into the tapered collar;
• and
• wherein the bore of the thrust component means is also tapered for gripping the tapered collar between the bore and the tapered male section and deforming the tapered collar when the thrust component means is pressed against the selected flange.