Abstract: A shelving system features two spaced apart pairs of support rods deployed roughly vertically with a number of shelf assemblies supported thereby. Each shelf assembly is constructed from an open ended, molded polymer shelf having two openings in the upper surface adjacent to each of the open ends, and two suspension inserts engageable within the open ends. Each suspension insert has a pair of vertical bores, aligned with the openings when assembled, which are configured for forming suspension joints with the support rods. Since the precision vertical bores are contained within the separate suspension inserts, the main body of the shelf can be molded by techniques employing primarily longitudinal movement of mold parts, i.e., along the longest dimension of the shelves. In a preferred embodiment, each shelf is formed with support elements of closed cross-section extending along most or all of its length. Also disclosed is a snap-on drawer assembly for attachment to the underside of one of the shelves.

Abstract: A wheel assembly for use with carts employs a sleeve element as an intermediate member between a central axle and both the wheel and the cart body. The sleeve element has an inner recess shaped to receive an end portion of the axle and a first external surface for rotatably engaging within a hole in the cart such that a part of the sleeve element functions as a bearing disposed between the axle and the hole. The sleeve element also has a resilient catch element for retaining it within the hole such that the axle is prevented from moving longitudinally while being free to rotate relative to the cart body. The sleeve element also provides a substantially cylindrical external surface for rotatable mounting of the wheel.