Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress
Reexamination Certificate
2006-07-28
2008-08-19
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Threaded fastener stress
C073S849000
Reexamination Certificate
active
07412898
ABSTRACT:
A fastener or other structural component for wireless sensing of applied tensile load. The fastener includes an elongate body with a bore that extends within the body. A grounding pin is positioned within the bore and attached to the body within the bore. The fastener includes a wireless transponder, such as a radio frequency identification (RFID) transponder or tag, that is mounted on a head provided at the end of the body and exposed to the bore, such as by positioning the RFID tag in a recessed surface of the head or extending the bore through the head. The transponder generates a response signal with a unique identifier in response to a radio frequency signal from a transmitter. The grounding pin contacts and grounds the transponder to block transmittal of the response signal when a tensile load applied to the fastener is less than a minimum tensile load value.
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