Trash can with power operated lid

What is this patent about?

’995 is related to the field of power-operated receptacles, specifically automated trash cans equipped with motorized lids. Traditional motion-sensing trash cans often suffer from high power consumption, inconsistent sensitivity due to varying light conditions or user skin tones, and accidental triggering. The background context emphasizes the need for a more energy-efficient and reliable sensing and drive system that can handle the mechanical stresses of automated lid movement while preserving battery life.

The underlying idea behind ’995 is a sophisticated power management and motion control strategy that optimizes the efficiency of a battery-powered motorized lid. Rather than running sensors and motors at a fixed rate, the system uses dynamic power scaling and intermittent polling to minimize energy waste. The inventor realized that by sampling battery voltage only at the moment of activation and selectively powering position sensors only during active movement, the device could maintain consistent performance even as the batteries discharge, while significantly extending their operational lifespan.

The claims of ’995 focus on a controller architecture that integrates a power supply voltage monitor with a variable motor drive module. This system is designed to detect the available voltage upon a trigger command and adjust the motor's duty cycle to compensate for both battery depletion and the varying mechanical force required at different stages of the lid's opening arc. The independent claims specifically protect the use of a braking module that reverses motor polarity for a short duration to ensure smooth stops, alongside a fault detection timer that cuts power if the motor stalls or encounters an obstruction.

In practice, the invention utilizes an encoder wheel and an optical interrupt sensor to track the lid's precise angular position. This feedback loop allows the controller to apply a specific power profile—often stored in a data map—to ensure the lid moves at a substantially constant speed. To further save energy, the main user-detection sensor, which may be located in a foot recess at the base of the unit, operates in a pulsating mode rather than drawing continuous current. This combination of low-power standby and high-precision active control ensures the lid feels responsive and premium throughout the life of the batteries.

This approach differs from prior solutions by moving away from simple on/off motor logic and continuous-drain sensors. By implementing active braking via motor reversal, the system avoids the mechanical jarring common in cheaper motorized bins. Furthermore, the mechanical linkage is designed to be non-binding, allowing a user to manually lift the lid without damaging the internal gear train. This dual-mode capability, paired with the intelligent voltage compensation, provides a level of reliability and user-experience consistency that traditional sensor-based receptacles fail to achieve.