System for harvesting energy from door or door hardware movement
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United States of America Patent
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Aug 29, 2017
Issued Date -
N/A
app pub date -
Aug 29, 2016
filing date -
May 7, 2012
priority date (Note) -
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Abstract
An electrical generation system for a door positioned in a doorway includes a hinge arranged to support the door for rotational movement with respect to the doorway between a closed position and an open position, and a cam that is one of coupled to the door for movement with the door, and fixed with respect to the doorway. A piezo-electric generator is the other of coupled to the door for movement with the door, and fixed with respect to the doorway. The piezo-electric generator and the cam cooperate such that rotation of the cam with respect to the piezo-electric generator is operable to produce an electrical current in response to rotation of the door, and wherein 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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