Patent ID: 7258317

Claim:
In a pull-out display shelf assembly of the type comprising laterally spaced-apart side support structures engageable at inner ends thereof with a vertical shelf mounting structure, a display shelf extending laterally between and slideably engaged by said spaced-apart side support structures, whereby said display shelf is movable in relation to said side support structures between a normal, fully retracted position and an extended position in which said shelf is positioned forwardly of its fully retracted position, and a position locking mechanism for fixing said display shelf in any of its adjusted positions and comprising a vertically disposed, rotatable locking bar of polygonal cross section with opposed locking edges engageable with a locking track, the improvement characterized by (a) said side support structures each comprising a stiff sheet metal element having front and back ends and an intermediate portion, (b) said intermediate portion being of generally L-shaped cross section comprising a generally vertical outer wall portion and a generally horizontal wall portion joined integrally and in one piece with said outer wall portion and extending laterally inward from said outer wall portion, (c) said generally horizontal wall portions each having an elongated slot formed therein defining said locking track, (d) said elongated slots having width dimensions greater than a minimum cross sectional dimension of said locking bars and less than a maximum cross sectional dimension of said locking bars, and (e) said locking bar having a portion extending vertically into said locking track for engagement of said locking edges with side edges of said locking track.