Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1986-12-16
1988-03-22
Wolfe, Robert L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411108, 411177, F16B 3704
Patent
active
047325186
ABSTRACT:
The fastener includes a nut, a basket, and a sleeve, the latter being received in an opening in a workpiece with its outer end flared to form an attaching flange. Spaced rounded lobes on the sleeve extend the full length of the opening and become embedded in the wall of the opening. The sleeve includes a corner surface adjacent its head which compresses and deforms the workpiece at one corner of the opening. A tool having an annular bulge is forced into the sleeve to expand it against the wall of the opening. When the end of the sleeve is flared to form the attacking flange, the other corner of the opening in the workpiece is compressed and cold-worked. The forces exerted by the sleeve on the workpiece greatly increase the fatigue life of the workpiece.
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Deutsch Fastener Corp.
Dino Suzanne L.
Wolfe Robert L.
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