Pull-out guide assembly for drawers, shelves or the like

Claim 1

In a pull-out guide arrangement for use on opposite sides of a drawer, shelf or the like for guiding movement thereof into and out of a body of a piece of furniture, said arrangement being of the type including, for use on respective opposite sides of the drawer, shelf or the like, first and second assemblies each comprising a supporting rail adapted to be mounted on a side panel of the body of the piece of furniture, a pull-out rail adapted to be mounted on the respective side of the drawer, shelf or the like, a roller carrier positioned between said supporting and pull-out rails, and rollers retained by said roller carrier, the improvement wherein: said first assembly comprises: a said supporting rail having spaced outer and inner vertical flanges and spaced upper and lower horizontal flanges; a said pull-out rail having outer and inner vertical flanges extending in opposite directions from opposite ends of a horizontal flange; a said roller carrier positioned between said supporting and pull-out rails; said rollers including plural cylindrical vertical load bearing rollers retained by said roller carrier, at least one said vertical load bearing roller being in rolling contact with said upper horizontal flange of said supporting rail and said horizontal flange of said pull-out rail, and at least one said vertical load bearing roller being in rolling contact with said horizontal flange of said pull-out rail and said lower horizontal flange of said supporting rail; and said rollers further including plural cylindrical, lateral guide rollers retained by said roller carrier, at least one said guide roller being above said horizontal flange of said pull-out rail and in rolling contact with a first said vertical flange of said supporting rail and a first said vertical flange of said pull-out rail, and at least one said guide roller being below said horizontal flange of said pull-out rail and in rolling contact with a second said vertical flange of said supporting rail and a second said vertical flange of said pull-out rail; and said second assembly comprises said supporting and pull-out rails each having only a single vertical flange; whereby said first assembly provides precise lateral stability for the drawer, shelf or the like, and said second assembly is laterally open to allow for manufacturing tolerances of the drawer, shelf or the like.