| 摘要 |
A stackable cart comprises a base comprising perimetral edges, front, middle, and rear portions, and an internal wired base support structure with a network of support wires. A plurality of front wheels is provided to support the front portion, wherein a chord of the front wheel corresponds to a stacking space defined between a plurality of front transverse wires of the network support wires. A plurality of rear wheels is provided to support the rear portion, wherein a chord of the rear wheel corresponds to a stacking space defined between a plurality of rear transverse wires of the network support wires. The cart is removably coupled to another equivalent cart by positioning the rear wheels of the cart adjacent to the stacking space of the rear transverse wires of the equivalent cart and positioning the front wheels of the cart adjacent to the stacking space of the front transverse wires of the equivalent cart. |
| 主权项 |
1. A cart, comprising:
a base comprising a front portion, a middle portion, and a rear portion, the base comprising a frame comprising perimetral edges defined by the front, middle, and rear portions of the base; a plurality of front wheels supporting the front portion of the base above a lower surface; a plurality of rear wheels supporting the rear portion of the base above the lower surface; and an internal support structure positioned in the frame, the internal support structure comprising:
a plurality of front transverse support members adjacent to the front portion extending between lateral edges of the perimetral edges, wherein two or more of the front transverse support members comprise a stacking space corresponding to a chord of the front wheel; anda plurality of rear transverse support members adjacent to the rear portion extending between lateral edges of the perimetral edges, wherein two or more of the rear transverse support members comprise a stacking space corresponding to a chord of the rear wheel;a plurality of middle wheels supporting the middle portion of the base, wherein a chord of the middle wheel is greater than the chord of the front and rear wheels, andwherein the internal support structure comprises middle transverse support members extending between the lateral edges along the middle portion of the base, wherein the middle transverse support members comprise a space greater or deeper than a diameter of the middle wheel so that the middle wheel is suspended when stacked, andsuch that the middle wheel hangs between and does not touch the middle transverse support members when the cart is stacked directly on top of an equivalent cart. |
