Patent ID: 8222754
Filing Date: 2012-07-17
Classification: F03G,H02K,H02N

Abstract:
1. A vibration-based power generator comprising: a base; a variable stiffness oscillator connected to the base, the oscillator comprising an inertial mass, the inertial mass moving relative to the base in response to vibrations transmitted to the base, the oscillator having a neutral position corresponding to a position of the oscillator relative to the base when no vibrations are transmitted to the base, the oscillator being movable to a first position where the inertial mass is at a first distance in a first direction from a position of the inertial mass when the oscillator is at the neutral position, the oscillator being movable to a second position where the inertial mass is at a second distance in the first direction from the position of the inertial mass when the oscillator is at the neutral position, the second distance being greater than the first distance, a stiffness of the oscillator at the second position being greater than a stiffness of the oscillator at the first position; and an electric energy transducer associated with the oscillator, the electric energy transducer generating electric power in response to movement of the inertial mass relative to the base.