Patent ID: 8564144

Claim:
A human powered electricity generator, comprising: a suspension system including a compliant mechanism that permits a first portion of said suspension system to be displaced relative to a second portion of said suspension system as a result of an application of force to the first or second portions of the suspension system; a generator that converts a mechanical displacement of said first portion of said suspension system with respect to said second portion of said suspension system into electrical energy; and displacement means connected to either said first portion or said second portion of said suspension system for enabling a user to manually displace the first portion of said suspension system with respect to said second portion of said suspension system, wherein the displacement means includes a seat adapted to accept the weight of a user to displace said first portion of said suspension system with respect to said second portion of said suspension system in response to the application of the user's weight to the seat at the top of a displacement stroke and to buoy the user back up at the bottom of the displacement stroke when the user extends his legs, wherein the displacement means comprises a spring and adjustment means for adjusting a spring constant of the spring to alter a natural displacement stroke frequency to an optimum value so as to accommodate different weights of users.