Interlocking structural track

Claim 1

A track assembly comprising a fixed track having two sides a top and a bottom engaged with a moveable track slidable with respect to the fixed track, the moveable track having two sides a top and a bottom and having disposed therewith anchoring means for securing a passenger to the moveable track, the fixed track having first and second portions engaging and being substantially U-shaped in cross-section, the fixed track having substantially inwardly extending second engaging portions disposed proximate the tops of the U-shaped fixed track extending inwardly towards one another and having a disposed proximate the terminus of each inwardly extending second engaging portion a substantially downwardly extending portion extending towards the bottom of the track and having disposed proximate the terminus of each downwardly extending portion first engaging portions extending towards each side of the fixed track in a direction away from one another and laterally towards the moveable track proximate the opening of the U-shaped cross-section, the moveable track having a top, bottom and sides and being of substantially double J form in cross-section, one of the J structures being a mirror image of the other, each J structure having a larger leg extending from proximate the bottom to proximate the top of the moveable track, and angled smaller leg extending substantially from proximate the bottom toward the top of the moveable track, wherein the smaller leg having disposed proximate the terminus thereof remote from the bottom of the J structure a third engaging portion disposed in a direction extending inwardly and then downwardly towards each larger leg of the double J form terminating with a hooking portion, each third portion being an extension of the smaller leg extending towards the larger leg, the bottom of each J structure providing a fourth engaging portion, the third and fourth engaging portions for interengagement with each first engaging portion of the U-shaped fixed track disposed substantially between each third and fourth engaging portions of the double J form moveable track in use, each fist and second engaging portion of the fixed track for interengagement with each third engaging portion of the moveable track disposed substantially between each first and second engaging portions of the fixed track in use; whereby when a force is exerted upon the track assembly through the anchor means in a direction tending to separate the tracks, the second engaging portions of the fixed track will engage the third engaging portions of the moveable track causing the third engaging portions to collapse towards the fourth engaging portions thus interlocking the first engaging portions therebetween and resisting the force tending to seperate the tracks, wherein bearing means is disposed between the fixed and moveable track between each second and third portions of the track assembly to assist in the collapse of the third portions toward the fourth portions when the track assembly is subjected to a force tending to separate the track assembly, normally the bearing means assisting movement of the moveable track engaged with the fixed track.