Waste container

What is this patent about?

’773 is related to the field of waste management hardware, specifically the design of refuse bins intended for use with automated collection vehicles. In residential and municipal settings, hydraulic lifters employ mechanical grippers to seize a container, elevate it, and invert it over a hopper. While standard containers often feature a top lip to prevent the bin from falling during the initial lift, they frequently lack sufficient geometry to prevent the bin from sliding out of the grippers once the unit is turned upside down, especially if the container lacks wheels or a tapered profile.

The underlying idea behind ’773 is to create a mechanical stop on the lower half of the container body that acts as a safety catch during the inversion cycle. By integrating specific outward-facing geometry below the primary gripping zone, the inventor ensures that if the bin begins to slide while upside down, the grippers will collide with these protrusions rather than letting the bin fall into the truck. This insight transforms the container body from a simple smooth vessel into a keyed structural component that works in tandem with the lifter’s clamping force.

The claims of ’773 focus on a container body featuring a radial lip at the top and at least one integrally molded protrusion positioned further down the sidewall to define a dedicated gripping area. The independent claims specifically describe the use of vertically extending splines on the body wall, where the safety protrusions extend outward from these splines. Furthermore, the claims detail the specific geometry of these stops, often defining them as triangular bosses or a combination of large primary stops and smaller friction-enhancing circular bosses.

In practice, the invention utilizes a series of triangular bosses arranged in pairs around the circumference of the bin, typically located midway down the body. These bosses are oriented with a straight edge facing upward to provide a flat surface for the grippers to seat against during inversion. To further increase the reliability of the hold, the design incorporates stripes of smaller circular bosses above and below the main stops, which increase the coefficient of friction and provide a tactile surface for the gripper pads to bite into.

This approach differs from prior solutions by providing a reliable stop mechanism for traditionally shaped, wheel-less containers that otherwise have smooth, vertical, or non-tapered walls. Unlike heavy municipal bins that rely on complex tapered geometries or bins that use wheels as a makeshift stop, this design uses integrally molded stops that are specifically positioned to trap the gripper. This ensures that the container remains securely held throughout the entire 180-degree rotation, regardless of the weight of the waste or the slickness of the container surface.