fixed to a metal fitting portion 22 of the seat cushion frame as seen in fig3 and 4 the lower end of the upper hinge arm 18 is pinned at 24 to the lower hinge arm 20 a suitable coiled torsion spring reclining mechanism is generally indicated in phantom outline at 26 in fig2 an example of a typical recliner mechanism is shown in u s pat no 4 337 978 and reference may be had to that patent for an explanation thereof the hinge member 16 may also include an inertia latch system that permits free movement of the seat back 14 while preventing its forward movement when a predetermined relative acceleration occurs as the inertia latch mechanism forms no part of the present invention it has been deleted from the drawings for the purpose of clarity an example of one type of inertia latch system suitable for use with the present invention is shown in u s pat no 4 358 155 issued nov 9 1982 to osterhold et al a similar hinge member not shown is provided at the inboard side of the seat back 14 the hinge arms 18 and 20 coact to mount the seat back 14 for pivotal movement relative to the seat cushion 11 the.