Method and apparatus for pull-through blind installation of a tubular member
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United States of America Patent
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May 31, 1994
Issued Date -
N/A
app pub date -
Jan 3, 1992
filing date -
Mar 17, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for the pull-through blind installation of a headless tubular ferrule in a hole in a workpiece at a position therealong spaced from the nearer face of the workpiece includes an annular anvil for supporting the ferrule inside the workpiece hole; anvil supporting means for initially supporting the anvil at a position inside the workpiece hole; a mandrel having a stem extending through the anvil aperture; and an enlarged head. The apparatus further includes a pneumatically-operated retraction device for retracting the mandrel stem through the anvil aperture thereby to draw the mandrel head into the adjacent part of the bore of the ferrule while the ferrule is supported inside the workpiece hole by the annular anvil, thereby to enlarge the part of the ferrule more remote from the anvil into engagement with the workpiece; and a pneumatically-operated withdrawal device for withdrawing the anvil away from the ferrule to allow the mandrel head to be withdrawn completely through the remainder of the bore of the ferrule, to complete installation of the ferrule.
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