Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-04-24
1998-11-03
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310330, H01L 4108
Patent
active
058313710
ABSTRACT:
A piezoelectric snap-actuator includes a piezoelectric bender element with electrodes disposed on each major face, a spring member for causing the device to snap from a first neutral position to a second neutral position, a prestress layer for applying a compressive force to the piezoelectric bender element, and adhesive layers is provided. The piezoelectric bender element and the spring member are each bonded to the opposite faces of the prestress layer by an adhesive layer. The device assumes one of two neutral positions when not electrically energized. Due to the direction of poling of the piezoelectric bender element, when the piezoelectric bender element is electrically energized it strains in a longitudinal direction. This strain causes the device to deform. When the electrical energy is turned off, the device returns to one of the two neutral positions.
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Clark Stephen E.
Dougherty Thomas M.
Face International Corp.
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