Trash can with power operated lid

What is this patent about?

’980 is related to the field of power-operated receptacles, specifically automated trash cans equipped with motorized lids. The background context involves the transition from manual waste bins to hands-free systems that utilize sensors to improve hygiene and convenience. However, traditional automated lids often suffer from motor strain when obstructed by overfilled trash, inconsistent sensor performance due to varying ambient light or user skin tones, and rigid operational cycles that frustrate users who need to reopen a lid while it is in the process of closing.

The underlying idea behind ’980 is a multi-stage motion control strategy combined with a mechanical safety release to protect the drive system. Instead of a simple binary open-close operation, the invention uses a sequence of position sensors to modulate motor speed, ensuring the lid approaches its maximum extension gently rather than slamming against a mechanical stop. Crucially, the inventor realized that by using a magnetic coupling between the motor and the lid, the drive system can complete its cycle even if the lid is physically blocked by a pile of trash, preventing the motor from stalling or burning out.

The claims of ’980 focus on a control architecture that utilizes three distinct position sensors—a home sensor, a pre-sensor, and a top sensor—to manage the lid's trajectory. The independent claim specifically protects a system where the controller triggers a braking module once the lid hits the intermediate pre-sensor. This creates a transitional movement where the lid shifts from a high-speed travel phase to a slower, controlled approach as it nears the fully open position, all while maintaining a releasable connection via magnets.

In practice, the system functions by monitoring the time elapsed between these sensor triggers. If the motor runs for a predetermined period without the lid reaching the next sensor, a fault detection module kills the power to prevent hardware damage. This timing logic works in tandem with the magnetic interface; if the lid is obstructed, the magnets simply detach, allowing the internal gears to reach the 'home' or 'top' sensors independently of the lid's actual position. This ensures the electronics remain synchronized with the mechanical state of the drive assembly.

This approach differs from prior solutions by replacing rigid mechanical linkages with a flexible, software-monitored drive path. By incorporating a scaled motor drive value calculated under load, the system also compensates for battery voltage fluctuations, ensuring consistent lid speed regardless of battery age. Furthermore, the integration of ambient light calibration allows the infrared sensors to distinguish between a deliberate user gesture and shifting room shadows, significantly reducing accidental activations and extending the operational life of the power supply.