G - Physics – 01 – L
Patent
G - Physics
01
L
85/5, 349/56.1
G01L 1/16 (2006.01) F16B 31/02 (2006.01) G01L 5/24 (2006.01)
Patent
CA 2034291
ABSTRACT This invention relates to a load indicating member comprising a shank having at least one groove and an ultrasonic transducer means coupled to a load indicating member so that an ultrasonic wave is directed to the groove. A surface can be formed adjacent to one longitudinal end of the shank and the ultrasonic transducer means can be coupled to this surface. Further, the ultrasonic transducer means can be coupled to this surface so that the ultrasonic wave is also directed to the other longitudinal end of the shank which is remote from the surface. The groove may be located on the shank at a predetermined distance from the surface for identification of the member. Moreover, the surface can have a recess, with the ultrasonic transducer means being located in the recess. Advantageously, the groove can be an annular groove or the groove can be comprised of threads disposed on the shank. Also, the shank can have two or more annular grooves. These grooves can be located on the shank at a predetermined distance apart for identification of the load indicating member. Preferably, the ultrasonic transducer means is a piezoelectric film transducer. Additionally, the preferred load indicating member is a fastener in accordance with the present invention.
Sps Technologies Inc.
Swabey Ogilvy Renault
LandOfFree
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