Protective Encapsulation
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United States of America Patent
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Issued Date -
Dec 10, 2009
app pub date -
Apr 24, 2007
filing date -
Apr 25, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An electrical device such as a piezoelectric actuator is protected against permeation by injurious fluids such as fuel (diesel/gasoline) and water by encapsulating the device with a shape memory metallic material. The shape memory metallic material may be in the form of a tube manufactured to the required dimensions for encapsulation of the device. The tube may then be plastically deformed, such as by stretching, before being placed over the device and heated above its transformation temperature to recover its original shape. The invention is particularly suitable for protecting passivated piezoelectric actuators.
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