Measuring and testing – Instrument proving or calibrating – Apparatus for measuring by use of vibration or apparatus for...
Reexamination Certificate
2005-10-20
2008-09-16
Williams, Hezron (Department: 2856)
Measuring and testing
Instrument proving or calibrating
Apparatus for measuring by use of vibration or apparatus for...
Reexamination Certificate
active
07424818
ABSTRACT:
An ultrasonic inspection reference standard for composite materials having porosity may include a member, having at least one thickness and defined by a plurality of holes, that is manufactured from a fiber-free polymer resin. The ultrasonic inspection reference standard may have similar acoustic properties to prior art, porous, fiber-reinforced, composite reference standards, at lower manufacturing cost. A photo-polymer resin reference standard, having at least one thickness and defined by a plurality of holes, may be created using a stereo lithography process. The polymer resin reference standard may replace more costly porous, fiber-reinforced, composite reference standards. The ultrasonic inspection reference standard, manufactured from a polymer resin, may be used for ultrasonic inspection of porous, fiber-reinforced composite parts in the aircraft industry and in other non-aircraft applications.
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Lilienthal David
Vaccaro Christopher M.
Bellamy Tamiko
Boeing Company
Wildman Harrold Allen & Dixon LLP
Williams Hezron
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