Abstract: An electrical energy generator comprising a housing having a longitudinal axis and opposite ends, an electromagnetically active mass positioned within the housing reciprocally movable along at least a portion of the longitudinal axis, an electrically conductive material within the housing, a body engaged with the electromagnetically active mass, and at least one spring positioned between at least one of an end of the housing and an end of the body, or between an end of the body and the electrically conductive material.

Abstract: Disclosed is an implantable biomedical device that incorporates an electrical energy generator. The electrical energy generator harvests kinetic energy from voluntary motor activity of a human or animal and converts the kinetic energy to usable electrical energy which is used to power the biomedical device. In certain embodiments, the electrical energy generator includes a housing, an electrical conductor, an electromagnetically active mass, springs connecting the mass to the housing, and electrically circuitry to generate a usable source of electrical power for the biomedical device.

Abstract: An electrical energy generator including a housing, an electromagnetically active mass positioned within the housing, an electrically conductive material within the housing, a body positioned within the housing wherein the body and the electromagnetically active mass move relative to each other, and at least one spring for imparting restorative forces to the electromagnetically active mass and the body.