Trash can assembly and improvements thereto

What is this patent about?

’943 is related to the field of household waste management systems, specifically focusing on the mechanical design of step-actuated trash cans. The background context involves improving the ergonomics and hygiene of refuse containers by addressing common failures in lid-opening mechanisms, the physical footprint of foot pedals, and the sanitary challenges associated with removing internal liners for emptying.

The underlying idea behind ’943 is to optimize the physical interaction between the user and the container by integrating the actuation and maintenance components into the shell's geometry. Rather than having a pedal that protrudes awkwardly, the invention utilizes a toe-kick recess that allows the pedal to be positioned partially inside the shell's periphery. This design shift not only prevents accidental tripping but also moves the pivot point inward, creating a more efficient lever that requires less force to lift the lid.

The claims of ’943 focus on several distinct structural embodiments, including a shell with a unitary frame that is offset to create a shoulder for the lid, featuring specific cut-outs for grasping the liner. Other independent claims protect a handle mechanism utilizing a link strip with a hooked end that engages an indent in the liner to lift it mechanically, as well as a base assembly where the pedal is pivotally secured to a skirt and remains radially flush with the container's bottom profile.

In practice, the invention works by utilizing a multi-axis link assembly that translates the downward pressure of a foot into vertical lift for the lid. The use of a curved recess panel, often made of a different material than the main shell, allows the pedal to sit deep within the unit's footprint. For maintenance, the handle mechanism employs an over-center locking geometry; when the external handle is flipped up, the internal hooked link pulls the rigid liner upward and holds it in a raised position, allowing the user to change bags without reaching into the contaminated interior.

This approach differs from prior solutions by eliminating the protruding hardware that typically characterizes step cans. By making the pedal flush with the annular skirt and integrating the liner-lift mechanism directly into the shell's side wall, the design achieves a smaller effective footprint while increasing mechanical advantage. Furthermore, the inclusion of specialized frame recesses ensures that trash bags remain completely hidden when the lid is closed, providing a cleaner aesthetic and a more secure seal against odors compared to traditional designs.