Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Including a series of elements – one element restricting two...
Patent
1979-06-20
1981-06-23
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Including a series of elements, one element restricting two...
411353, 411424, F16B 3900
Patent
active
042744601
ABSTRACT:
There is disclosed a structural joint comprising a workpiece in the form of a section of sheet material and a fastener assembly, wherein the components of said joint are constructed to retain the fastener assembly in mounted relation with respect to the sheet material and confine the fastener against rotation upon the attachment of an additional fastener component thereto. The section of sheet material includes an aperture having a multi-lobular periphery. The fastener assembly includes a head portion and a shank portion extending axially therefrom. The head portion has an end cap section which is of a greater dimension than the sheet material aperture, and an intermediate section extending axially from the cap section and having a multi-lobular peripheral dimension to be received in the multi-lobular aperture formed in the section of sheet material. The end cap section also includes a third section extending axially from the intermediate section to the shank portion, which third section has a circumferential groove formed therein with a resilient split retaining ring loosely mounted in said groove. The retaining ring is caused to be reduced in dimension from its free form dimension upon engaging the sheet aperture and to be returned to its free form dimension after the head portion intermediate section is received by the aperture. As a result, the fastener is retained within the aperture with the sheet material confined between the fastener end cap and the retaining ring while the multi-lobular aperture and intermediate section peripheries co-act to prevent rotation of the fastener.
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Britts Ramon S.
Textron Inc.
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