Abstract: Disclosed is a wearable propulsion device including an upper defining an interior cavity configured to receive a human foot, a sole, one or more piezoelectric elements, and a plurality of plungers. The upper includes a bottom surface. The sole is coupled to that bottom surface. The one or more piezoelectric elements are disposed within the sole and configured to generate energy when the sole contacts a surface.

Abstract: Disclosed is a piezoelectric wearable device that simultaneously harvests and utilizes energy. In one embodiment, the present invention includes footwear having piezoelectric elements and a plurality of plungers on the outer sole thereof. In operation, the plungers act in alternate sequences such that a first set of rows retracts or rises off of the ground while a second set of rows extends or drops towards the ground. The piezoelectric elements include piezoelectric transducers, each having a sensor and a piezoelectric ceramic embedded therein. When activated, the sensor captures the electrical charge produced therefrom. Thereafter, the piezoelectric ceramic can convert the electric charge into energy, which is then stored and used to propel the footwear in any direction, wherein the wearer may control the direction via an external electronic device.