Trash can with power operated lid

What is this patent about?

’969 is related to the field of power-operated receptacles, specifically automated trash cans equipped with motorized lids. The background context involves the evolution of hands-free waste management, where infrared sensors are used to trigger lid movement. However, traditional systems often suffer from false triggers caused by ambient sunlight or flickering fluorescent lights, and they frequently fail to provide consistent lid speed as battery levels fluctuate or when users need the lid to remain open for extended tasks.

The underlying idea behind ’969 is to enhance the reliability and responsiveness of the automated lid through a combination of physical shielding and intelligent signal processing. By recessing the light receiver deeper into a specialized housing than the emitters and utilizing a multi-bit encryption for the light pulses, the system effectively filters out environmental noise. Furthermore, the invention introduces a dynamic sensitivity model that adjusts the detection field and motor power in real-time based on the lid's current state and the available battery voltage.

The claims of ’969 focus on a sensor assembly architecture that utilizes a protective covering with specific geometry to prevent interference. Independent claim 1 specifies a structure where the light receiver is embedded deeper into an opening of the covering than the light emitter to shield it from ambient light. Independent claim 12 describes a multi-stage emitter array where a central group of emitters covers a narrow zone, while a secondary outer group expands the detection field to the full width of the receptacle when higher sensitivity is required.

In practice, the invention works by emitting a pulsed, encrypted infrared signal that must be reflected by a user's hand and recognized by the recessed receiver. To prevent the lid from accidentally reopening while it is closing, the controller enters a high filter mode, requiring a higher threshold of successful signal matches. If the system detects a sustained presence, it enters an extended chore mode, holding the lid open for a longer duration to accommodate bulkier disposal tasks without requiring repeated triggers.

This approach differs from prior solutions by addressing the mechanical and electronic inconsistencies of battery-powered motors. While older systems might slow down as batteries drain, this invention employs a speed compensation module that applies voltage offsets to maintain a uniform opening and closing velocity. Additionally, the use of V-shaped openings and oblong viewing angles ensures the sensor is highly sensitive to intentional movements directly above the can while remaining indifferent to people simply walking past the unit.