Self-diagnosing pierce nut installation apparatus
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United States of America Patent
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Mar 20, 2012
Grant Date -
Nov 29, 2007
app pub date -
Dec 3, 2003
filing date -
Mar 19, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A self-diagnosing pierce nut installation apparatus including an installation head attached to an upper die member of a die press having a reciprocating plunger driving a pierce nut against a panel, piercing a slug from the panel upon closing of the press and a rod telescopically received in the plunger resiliently biased through the nut bore if a slug is pierced from the panel or against the panel if not pierced, and a sensor sensing axial movement of the rod, stopping the press if the rod engages the panel. A die located in the lower die member includes a slug sensor confirming receipt of the panel slug through the die member.
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