Patent ID: 7667375

Claim:
An energy harvesting apparatus configured to be positioned in vibration receiving communication with a structure, the energy harvesting apparatus comprising: a housing adapted to connect to a structure carrying a plurality of environmentally produced vibration frequencies distributed over a frequency range; a base beam formed of a resilient material defining a resilient common backbone having a proximal fixed portion fixedly connected to the housing, a non-fixed distal portion, and a non-fixed medial portion extending therebetween to thereby form a cantilever; and a plurality of cantilevered beams each fixedly connected to a non-fixed portion of the resilient common backbone and defining a corresponding plurality of energy harvesting generators, each energy harvesting generator having a preselected different resonant frequency defining a mode and configured to resonate at each of a plurality of frequencies adjacent the respective preselected resonant frequency defining a generator bandwidth, the plurality of generators collectively configured to provide energy harvesting over each of the plurality of generator bandwidths to thereby enhance energy harvesting.