Multi-lobular lockbolt and system
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United States of America Patent
Stats
-
Mar 16, 2010
Grant Date -
Mar 2, 2006
app pub date -
Aug 29, 2005
filing date -
Aug 30, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lockbolt which includes a head portion and a shaft which extends from the head portion. The shaft includes at least a portion which is threaded and has a multi-lobular profile. A collar is swageable onto the multi-lobular threaded portion, and thereafter the lobes provide that the collar does not tend to vibrate loose from the threading. The fact that the section which has a multi-lobular profile is also threaded provides that the collar (or a conventional threaded nut) can be selectively rotatably removed and re-installed on the lockbolt. Before swaging, the collar may initially include a cylindrical bore, or a bore which is multi-faceted, preferably generally corresponding to the profile of the multi-lobular portion of the lockbolt. The lockbolt may or may not include a frangible pintail.
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