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Method and apparatus for scavenging and using energy caused by changes in pressure

  • US 7,178,389 B2
  • Filed: 12/17/2004
  • Issued: 02/20/2007
  • Est. Priority Date: 12/17/2004
  • Status: Active Grant
First Claim
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1. An apparatus to scavenge energy caused by changes in interior pressure of a container, comprising:

  • a pneumatic container having the interior pressure;

    at least one flexible chamber containing a fluid at a predetermined pressure; and

    a piezoelectric element coupled to the at least one flexible chamber and communicatively coupled to the interior pressure of the pneumatic container so as to generate electricity when the flexible chamber is flexed by a change in the interior pressure of the pneumatic container;

    wherein the piezoelectric element is formed to surround the flexible chamber.

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