System for harvesting energy from door or door hardware movement
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United States of America Patent
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Aug 30, 2016
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N/A
app pub date -
May 7, 2013
filing date -
May 7, 2012
priority date (Note) -
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Abstract
An electrical generation system for a doorway including a door includes a lock mechanism movable between an engaged position and a disengaged position to allow the door to move between a closed position and an open position and a cam coupled to the door. A piezo-electric generator is coupled to the cam. The cam is rotatable with respect to the piezo-electric generator. The piezo-electric generator is operable to produce an electrical current in response to rotation of the cam with respect to the piezo-electric generator, and the electrical current has a frequency that is greater than the number of revolutions made by the cam with respect to the piezo-electric generator.
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