Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-07-05
2011-07-05
Wu, Daniel (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S680000, C340S687000, C340S686400, C340S691700, C340S539100, C116S200000, C116S208000, C411S001000, C411S002000, C411S008000
Reexamination Certificate
active
07973671
ABSTRACT:
A wireless breakage indicator for a shear pin having an axial bore. The indicator (10) comprises a stem (20) having a head (22) and a foot (24) at opposite ends thereof; a sleeve (32) around a portion of the stem between a first (28) and second (30) axial positions, the stem (20) and sleeve (32) adapted to be broken by the shear pin (12) in the event of its breakage; a spring (26) compressed between the head (22) of the stem (20) and a first end (34) of the sleeve (32); the foot (24) of the stem (20) being retained to the second end (36) of the sleeve (32). The breakage of the stem (20) frees the head (22) to be displaced by the spring (26) and indicate breakage of the shear pin (12). The indication can be direct, by visual inspection of the displaced head, or indirect by the displacement of the head activating a transmitter.
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Cloutier Marius
Pronovost Jean
Ogilvy Renault LLP
Tang Son M
Vibrosystm Inc.
Wu Daniel
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