A human powered centrifuge has independently established turntable angular velocity and human power input. A control system allows excess input power to be stored as electric energy in a battery or dissipated as heat through a resistor. In a mechanical embodiment, the excess power is dissipated in a...http://www.google.ca/patents/US5616104?utm_source=gb-gplus-sharePatent US5616104 - Human powered centrifuge
