Forced vibration piezo generator and piezo actuator

Details Forced vibration piezo generator and piezo actuator Forced vibration piezo generator and piezo actuator

2008-12-12

2011-10-18

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S311000, C310S331000

Reexamination Certificate

active

08040022

ABSTRACT:
Piezoelectric elements for power generation and/or actuation are described. An aspect is directed to generators utilizing piezoelectric elements for electrical power generation. Such a generator can use one or more arrays of piezoelectric cantilevers for electrical power generation in conjunction with modulated air pressure used for exciting the cantilevers. The pressure level/modulation and cantilever area can be controlled variables for maximizing the bending, and hence energy generation, of the cantilevers. A further aspect is directed to hydraulic fluid actuators utilizing a pumping mechanism that includes a piezoelectric element. The linear actuators can advantageously utilize the high force and high frequency characteristics of a piezoelectric membrane in conjunction with a large stroke and actuation direction conversion afforded by hydraulic transmission.

REFERENCES:
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patent: 4752053 (1988-06-01), Boetzkes
patent: 6011346 (2000-01-01), Buchanan et al.
patent: 6424079 (2002-07-01), Carroll
patent: 7246660 (2007-07-01), Fripp et al.
patent: 2002/0043895 (2002-04-01), Richards et al.
patent: 2005/0280334 (2005-12-01), Ott et al.

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